Operation, Maintenance Manual, and Logbook for Propeller Systems HM-5V1-B1000-A, HM-6V1-A1000-A (2018)

Page 3-6

Rev. 1 Sep/13

INSTALLATION AND REMOVAL

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Propeller System Components

Figure 3-1

Blade

Hub

Blade Retention

Bearing

Preload Plate

Lubrication

Fitting -

5 Blade Only

Fork

Stub Shaft

Flange

Beta Tube

Assembly

Pitch Change

Rod

Mounting Bolt

Engine Flange

Mounting

Stud

Pitch

Change

Rod Spring

Balance Ring

Cylinder

Pitch Lock

Bracket

Anti-rotation Rod

TI-300-001

5 Blade Propeller shown for reference

Pitch Lock Ring

Blade Seal

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2. Propeller Assembly Pre-Installation

A. Inspection of Shipping Package

(1) Examine the exterior of the shipping container for signs of shipping damage,

especially at the box ends around each blade.

(2) A hole, tear, or crushed appearance at the end of the box (at the propeller tips)

may indicate the propeller was dropped during shipment, possibly damaging

the blades.

B. Uncrating

(1) Place the propeller container on a firm support.

(2) Remove the banding and any external wood bracing from the shipping

container.

(3) Remove the blades from the cardboard box.
(4) Remove the hub from the wooden container.

CAUTION:

DO NOT STAND THE PROPELLER ON A BLADE TIP.

(5) Put the propeller on a padded surface that supports the entire length of the

propeller.

(6) Remove the plastic dust cover cup from the propeller mounting flange, if

installed.

C. Inspection after Shipment

(1) After removing the propeller from the shipping container, examine the propeller

components for shipping damage.

Page 3-8

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Torque Values

Table 3-3

Part Number

Description

Torque

5 Blade

6 Blade

Ft-Lb

In-Lb

N•m

103093

Preload set screw

13-15

103192

1/2-20 Thin hex nut,

Preload jam nut

103137

Bolt, 1/4-28, hex head

Cylinder mounting to hub

12-14

103133

Cylinder mounting ring to

hub

Snug

A-2043-1

Nut, hub parting line

30 Initial torque

A-2043-1

Nut, hub parting line

38-42 final torque

51-57

A-279

Lubrication fitting

Snug

102683

Plug, lubrication fitting

Snug

B-3808-3

Bolt, balance ring

30-36

3.3-4.6

A-3527

Nut, propeller mounting

drive shaft to propeller

120-130, Wet

163-176, Wet

104993

Bolt, drive shaft to

propeller

175-180, Wet

237-244, Wet

B-3347

Bolt, propeller mounting

stub to propeller

120-130, Wet

163-176, Wet

C-6474

Bolt, propeller mounting

stub to propeller

34-38, Wet

46-51, Wet

103004

Pitch change rod to fork,

L.H. Thread

76-84, Wet

103-114, Wet

103067

Piston to pitch change rod,

L.H. Thread

40-42, Wet

54-57, Wet

B-3384-( )

Screw, balance weight

10-12

14-16

B-3384-1H

Bolt, 1/4-28, (Beta

Manifold Ass'y Housing)

4-6

5.5-8.1

CAUTION 1: TORQUE VALUES ARE BASED ON NON-LUBRICATED THREADS, UNLESS SPECIFIED

IN TABLE 3-3, TORQUE VALUES.

CAUTION 2: FOR TORQUE READING WHEN USING A TORQUE WRENCH ADAPTER, REFER TO

FIGURE 3-9, DETERMINING TORQUE VALUE WHEN USING A TORQUING ADAPTER.

NOTE: Torque tolerance is ± 10 percent unless otherwise noted.

Page 3-9

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PART NUMBER

PART DESCRIPTION

WHERE USED

5 Blade

6 Blade

C-3317-255

O-ring

Hub/cover plate

C-3317-239-2

C-3317-378

O-ring

Mounting flange to drive shaft

C-3317-168

C-3317-170

O-ring

Cover plate - outer

C-3317-160

O-ring

Cover plate - inner

C-3317-425-2

C-3317-425-2 O-ring

Piston

C-3317-223-2

C-3317-223-2 O-ring

Pitch change rod to cover plate

C-3317-341-8

C-3317-341-8 O-ring

Blade shank

C-3317-322

O-ring

Cylinder mtg. flange

C-3317-239-2

O-ring

Mounting flange to drive shaft

and

Stub shaft to cylinder

C-3317-134-2

C-3317-134-2 O-ring

Stub shaft/beta manifold

A-1037-4

3/8-24 Hex Head Bolt

Hub clamping bolt

A-2043-1

3/8-24 Self-locking Hex Nut

Hub clamping nut

B-3834-0632

Washer

Hub clamping washer

103093

1/2-20 Oval Point Set Screw

Preload plate

103192

1/2-20 Thin Hex Nut

Preload plate

103137

1/4-28 Hex Head Bolt

Cylinder to Hub

103136

1/4 Washer Seal

Cylinder to hub

and

Cylinder to beta manifold

B-3347

9/16-18 12 pt. Mounting Bolt

Stub shaft to propeller

A-3257

9/16-18 Self-locking Hex Nut

Drive shaft to propeller flange

104993

Bolt, 5/8-18, 12 point

Drive shaft to propeller flange

C-6474

Bolt, 3/8-24, 12 point

Stub shaft to cylinder

A-2048-2

9/16 Countersunk Mounting Washer Stub shaft to cylinder

104994

Countersunk Mounting Washer

Drive shaft to propeller

103096

Spiral Retainer Ring

To secure the seal housing

B-3384-1H

Bolt, 1/4-28

Beta manifold ass'y housing

O-ring and Propeller Mounting Hardware Identification

Table 3-4

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D. Reassembly Procedures when Blades Have Been Removed for Shipment

(1) All blades are removed from the propeller after assembly at the factory to

facilitate shipment.

(2) In such cases the propeller has been fully assembled, tested, inspected, and

statically balanced at the factory before blade removal and shipment.

(3) Before starting reassembly, review any of the following information and

instructions that are applicable:
(a) Table 3-3, Torque Values

(b) Table 3-4, O-ring and Propeller Mounting Hardware Identification

(c)  Approved consumables in Table 3-2, Consumables Materials
(d)  Cleaning procedures in the Maintenance Practices chapter of this manual
(e)  Inspection and check procedures in the Inspection and Check chapter of

this manual

(f) Checking blade track in the Inspection and Check chapter of this manual

(4) The propeller hub has been shipped assembled. Disassemble the hub in

accordance with the following procedure:

(a) Put the hub on the rotatable fixture of the assembly table.

(b) Remove cylinder mounting bolts and seal washers that attach the cylinder

mounting flange.

attaching holes equally spaced.

(d)  Remove the cylinder.
(e)  Unscrew and remove the piston.
(f)  Unscrew the pitch change rod.
(g)  Remove the cover plate.

CAUTION:

THE CAP HEAD SCREWS ARE INTENTIONALLY LEFT

LOOSE IN THE CYLINDER MOUNTING RING TO FACILITATE

ALIGNMENT DURING ASSEMBLY. DO NOT TIGHTEN OR

REMOVE THEM AT THIS TIME.

(h)

Do not remove

the smaller cap head screws that secure the cylinder

mounting ring to the hub.

(i)  Remove the anti-rotation rods.
(j)   Remove the hub bolts, self locking nuts, and washers from the hub.
(k)   Separate the hub halves.
(l)  Remove the fork.

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CAUTION:

DO NOT REMOVE GREASE FROM THE BLADE SOCKETS.

(5) Using solvent CM23 or equivalent, remove all traces of grease from the parting

line face. Do not remove grease from the blade sockets.

(6) Using grease CM12, apply a light layer to the hub blade arm O-ring grooves

before installation of the blades.

(7) Locate blade number one.

NOTE: Blade and corresponding blade socket are pre-marked at the factory

for identification during reassembly.

(8) Carefully remove the packaging over the blade bearing. Any excess grease

remaining on the packaging should be wiped on the blade bearing.

(9) Make sure that the preload set screws and jam nuts are installed in the preload

plates before propeller assembly.

CAUTION:

DO NOT REMOVE THE PRELOAD SET SCREWS.

(10) Using grease CM12, apply a light layer to each blade O-ring.

CAUTION:

MAKE SURE THE BLADE SEAL IS INSTALLED ON THE BLADE

AND IS NOT TWISTED WHEN INSTALLING IT.

(11) Using grease CM12, apply a light layer to each blade seal.
(12) Install the blade seal on the blade outboard of the pitch lock ring with the

narrow side of the blade seal to the hub. Do not permit the blade seal to twist.

(13) Position the two blade O-rings on the blade shank. Refer to Table 3-4, O-ring

and Propeller Mounting Hardware Identification.

(14) Set up the blade support stand TE126, or equivalent, to support the blade.

(a) Place the support stand approximately ten inches (25.4 cm) inboard of

where the blade tip will be.

(15) Carefully position the blade into the corresponding numbered socket of the hub.

(a) Make sure the blade O-rings are properly positioned in the hub O-ring

grooves.

(16) Rotate the hub side bearing race until the race split line is located toward the

blade trailing edge, 90 degrees from the hub parting line. Refer to

Figure 3-2.

(17) As needed, rotate the preload plate so that the cutout is centered on the hub

parting line. Refer to Figure 3-3.

(a) Rotate the blade to the midpoint of its travel until the blade is lying flat on

the stand.

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CAUTION:

MAKE SURE THAT THE CHAMFERS ON THE PRELOAD PLATES

ARE ALIGNED.

(18) Repeat steps 2.D.(11) through 2.D.(17) for blade number two if assembling a 5

blade propeller and for blade two and three if assembling a 6 blade propeller.

(19) Install the fork onto the cam followers of the blades.
(20) Apply anti-seize CM118 to the pitch change rod and temporarily thread it by

hand into the fork in a counterclockwise direction (left-hand threads) until it

bottoms out into the fork.

(21) Make sure the alignment mark on the fork is in line with the alignment mark on

the hub.

(22) Move the blades to reverse pitch blade angle to raise the fork, so that the cam

follower slots and the fork are above the parting line of the hub.

(23) Repeat steps 2.D.(11) through 2.D.(17) for remaining blades.

CAUTION:

MAKE SURE THAT THE CHAMFERS ON THE PRELOAD

PLATES ARE ALIGNED.

(a) Carefully position the remaining blades into the engine side hub half.
(b) Insert each blade cam follower into its appropriate position in the fork and

rotate the blade into place.

(24) After all blades are installed, rotate each blade to the midpoint of its travel until

the blade is lying flat on the stand, camber side up.

(25) Make sure that the blade O-rings, refer to Table 3-4, O-ring and Propeller

Mounting Hardware Identification, are seated properly in the hub grooves and

that each blade bearing split line is located toward the blade trailing edge,

90 degrees from the hub parting surface. Refer to Figure 3-2.

NOTE: If needed, use a smooth edged wooden tounge depressor to carefully

help position and seat the blade O-rings.

Page 3-14

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5 Blade Hub Assembly

Figure 3-4A

Cover Plate

Cylinder

Pitch Change

Rod O-ring

Pitch Change

Rod O-ring

Cylinder

O-ring

Cover Plate

O-ring

(Inside)

Cover Plate

O-ring

(Outside)

Balance Ring

Bolt

Washer

TI-300-0130

Hub Half

Anti-Rotation

Rod

Pitch

Change

Rod

Hub

Clamping

Bolt

Piston

Washer

Pitch Lock

Bracket

Hub Half

Lubrication

Plug

Fork

O-ring, Cover

Plate to Hub

Page 3-15

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Cover Plate

Cylinder

Pitch Change

Rod O-ring

Pitch Change

Rod O-ring

Cylinder

O-ring

Cover Plate

O-ring

(Inside)

Cover Plate

O-ring

(Outside)

Balance Ring

Bolt

Washer

TI-300-0131

Hub Half

Anti-Rotation

Rod

Pitch

Change

Rod

Hub

Clamping

Bolt

Piston

Washer

Pitch Lock

Bracket

Hub Half

Lubrication

Plug

Fork

O-ring, Cover

Plate to Hub

6 Blade Hub Assembly

Figure 3-4B

Page 3-16

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TI-301-0141

E. Hub Assembly

CAUTION:

WHEN APPLYING SILICONE SEALANT CM257 TO THE HUB

PARTING LINES, MAKE SURE THAT EXCESS SILICONE

SEALANT CM257 DOES NOT SEEP INTO THE HUB/BLADE

O-RING GROOVE WHEN THE HUB CLAMPING BOLTS ARE

TORQUED.

(1) Put a bead of silicone sealant CM257 on the hub mating surfaces. Refer to

Figure 3-5.
(a) Smooth the bead of silicone sealant CM257 to coat the entire hub parting

line surface of the cylinder side hub half with a thin coat of silicone sealant

CM257.

(b) Use only enough silicone sealant on the mating surfaces so that a small

amount will be squeezed out along the entire parting surface when the

hub nuts are properly torqued.

grooves.

(d) Install the cylinder side hub half within 6 minutes of the application of

silicone sealant CM257.

Applying Sealant Between the Hub Halves

Figure 3-5

Page 3-17

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(2) Using the hub guide bushings, line up the hub halves and seat the cylinder half

of the hub in place.
(a) Make sure that the blade O-rings are in the hub blade O-ring grooves

before trying to seat the hub in place.

(3) Install the inner hub clamping bolts, washers, and self locking nuts. Refer

to Table 3-4, O-ring and Propeller Mounting Hardware Identification for hub

clamping bolts, washers, and self locking nuts part numbers.

CAUTION:

DO NOT TORQUE THE HUB CLAMPING BOLTS AT THIS TIME.

(4) Using a staggered sequence, tighten the hub clamping nuts until snug.
(5) Move the propeller blades to the feather position so that the fork is on the

bottom of the hub. This will provide room to permit the torquing of the preload

set screws.

(6) Remove the pitch change rod.
(7) Remove the blade stands TE126, or equivalent.

Tightening Preload Plate Set Screw and Jam Nut

Figure 3-6

Pitch Change Knob Bracket (720)

Preload Plate (500)

Nut (510)

Torque Wrench

TE495

TI-301-0139

Page 3-18

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(8) Set the blade preload.

WARNING:

DO NOT ATTEMPT TO REUSE A PREVIOUSLY USED SET

SCREW.

CAUTION:

MAKE SURE THAT THE PRELOAD PLATES ARE FULLY

SEATED. USING YOUR HAND, MOVE THE BLADES UP AND

DOWN IN THE HUB SOCKET.

(a) Using a torque wrench TE495, remove the installed preload set screws

and jam nuts.

(b) Thoroughly coat the threads of the preload set screws with thread locking

compound CM21.

(c) Install the preload set screws into the preload plate threads.
(d) Using a torque wrench TE495, torque each preload set screw in

accordance with Table 3-3, Torque Values. Refer to Figure 3-6.

(e) Install the preload jam nuts onto the set screws.
(f) Using torque wrench TE495, torque the preload jam nuts in accordance

with Table 3-3, Torque Values. Refer to Figure 3-6.

(g) The blades must turn freely in the hub after setting preload with no

evidence of in-and-out movement.

(9) Using a staggered sequence, tighten the inner hub clamping nuts to the initial

torque indicated in Table 3-3, Torque Values.

(10) Visually check to make sure some of the silicone sealant CM257 has squeezed

out from between the hub halves at the mating surfaces between each blade.

CAUTION:

MAKE SURE THE HEADED VALVE PINS ARE SECURELY IN

PLACE IN THE PITCH CHANGE ROD BEFORE INSTALLING THE

PITCH CHANGE ROD.

(11) Carefully thread the pitch change rod by hand into the fork by spinning the pitch

change rod unit counterclockwise (left-hand threads) as far as possible.
(a) If necessary, using the propeller blades, adjust the position of the fork to

seat the pitch change rod properly.

NOTE: The pitch change rod and fork have left-hand threads.

Page 3-19

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Installation of the Blade Seal

Figure 3-7

Installation of Hub Clamping Bolts and Pitch Lock Bracket

Figure 3-8

Blade

Blade Seal (240)

Pitch Lock Ring

TI-300-004

Propeller Hub

Pitch Lock Bracket (230)

Washer (220)

Bolt (220)

Narrow Edge of the Blade Seal (240)

Pitch Lock Ring

Page 3-20

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(12) Rotate the blades from reverse to full forward to make sure full travel can be

achieved.

(a) Using a digital protractor TE97, zero it out on the cylinder mounting flange.

(b) Line up the protractor with the reference tape on the blade.
(c) Check the total blade travel from full forward to full reverse.

Acceptable blade tolerance at full forward pitch is 35 degrees

+/- 5 degrees.

Acceptable blade tolerance at full reverse pitch is -35 degrees

+/- 5 degrees.

(d) If full travel is not achieved, remove the cylinder side hub half and find the

source of the problem.

(13) Tighten the hub clamping nuts to the final torque indicated in Table 3-3, Torque

Values.

(14) Using solvent, remove excess silicone sealant from the seal line between the

hub mating surfaces.

(15) Install a pitch lock bracket on each hub socket. Refer to Figure 3-7 and

Figure 3-8.

(16)  Install a washer under each end of the pitch lock bracket. Refer to Figure 3-7.
(17)  Insert the remaining hub clamping hub bolts and washers.
(18)  Install the hub clamping self-locking nuts and washers on the hub bolts.
(19)  Tighten the hub clamping self-locking nuts to the initial torque indicated in

Table 3-3, Torque Values, using a staggered sequence to make sure that a

uniform pull-down on the hub halves.

(20) Using a staggered sequence, torque the hub clamping self locking nuts to the

final torque indicated in Table 3-3, Torque Values.

(21) Move the blade seal between the pitch lock ring and the hub. Make sure that

the wide side of the blade seal is next to the pitch lock ring. Refer to Figure 3-8.

NOTE: Do not permit the blade seal to twist.

(22) Rotate the blades to full forward, so that the fork rests on the hub.
(23) Make sure that the blades turn freely in the hub after setting preload and after

final torque of the hub clamping nuts with no evidence of in-and-out movement.

(24) Rotate the blades to the reverse position, toward the top of the hub.

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(25) Put the small end of the anti-rotation rod in place on the fork.

(a) Make sure that the rods engage in the engine side hub half.
(b) Apply a small amount of lubricant CM12 on the top of each anti-rotation

rod.

(26) Install threaded, headless alignment pins TE159 through the hub unit and into

the cylinder mounting ring.

(27) Tighten the threaded, headless alignment pins TE159 until snug.
(28) Using grease CM12, apply a light layer to the O-ring on the side of the cover

plate that will seat between the hub and the cover plate.

(29) Using grease CM12, apply a light layer to the O-ring in the hub that is between

the hub and the cover plate.

(30) Rotate the blade pitch to approximately 3/4 reverse pitch. Make sure that the

anti-rotation rods do not move.

(31) Align the cover plate marking to the marking on the hub. (The marks will be

made by the manufacturer.)

CAUTION:

IF THE GAP BETWEEN THE COVER PLATE AND THE HUB IS

GREATER THAN 0.100 INCH, (2.54 MM) DO NOT ATTEMPT

TO TORQUE THE ASSEMBLY SCREWS. DAMAGE TO THE

COMPONENTS MAY RESULT.

(32) Install the cover plate over the threaded, headless alignment pins TE159 until it

is within 0.100 inch (2.54 mm) of the hub surface.

(33)  Install the O-ring on the face side of the cover plate.
(34)  Install the check cylinder tool TE509 on the cover plate. Refer to Figure 3-9.
(35)  Using two (2) bolts and two (2) seal washers, attach the check cylinder tool

TE509 to the cover plate.

(36) Remove the threaded, headless alignment pins TE159.
(37) Using the remaining bolts and seal washers, attach the check cylinder tool

TE509 to the cover plate.

(38) Tighten the bolts, using a staggered pattern, until the cover plate is flush with

the hub. Refer to Figure 3-9

Page 3-23

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(39) Perform a pressure check - 6 Blade Only

(a) Install the leak check manifold TE506 with adapter TE507 to the check

cylinder tool TE509.

(b) Apply 50 PSI (3.44 Bar) air pressure through the leak check

manifold TE506.

NOTE: Pressure will drop, but must maintain a minimum of 45 psi.

(e) If a minimum of 45 PSI (3.10 Bar) is not maintained, reapply 50 PSI

(3.44 Bar) and using leak detector CM122 troubleshoot the leak.

(f) If a minimum of 45 PSI (3.10 Bar) is maintained, remove the leak check

manifold TE506 and adapter TE507.

(g) Remove the check cylinder tool TE509, the two (2) bolts, and two (2)

washers.

(h) Install the two (2) threaded, headless alignment pins TE159.
(i) Remove the remaining bolts and washers.

(40) Torque the pitch change rod in accordance with Table 3-3, Torque Values.
(41) Stretch the O-ring and install the O-ring in the ID of the cover plate between the

cylinder and the cover plate.

NOTE: To prevent the O-ring from getting cut during installation of the

cylinder, stretch the O-ring before installing in the groove.

(42) Make sure that the O-ring is completely seated in the O-ring groove.

(a) If the O-ring is not 100% seated in the groove, remove the O-ring and

repeat the stretch.

(b) If the O-ring cannot be 100% seated in the groove, replace the O-ring.

(43) Apply anti-seize CM118 to the external threads of the pitch change rod.

CAUTION:

MAKE SURE THE WRENCHING FLATS ON THE PISTON ARE

TOWARDS THE TOP WHEN INSTALLING IT OVER THE PITCH

CHANGE ROD.

(44) Install the piston over the pitch change rod, wrenching-flats towards the top.

NOTE: The piston has left-handed threads.

(45) Torque the piston in accordance with Table 3-3, Torque Values.

Page 3-25

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CAUTION:

MAKE SURE THE O-RING IS 100% SEATED IN THE O-RING

GROOVE BEFORE INSTALLATION OF THE CYINDER.

(46) Carefully align the bolt holes in the cylinder over the alignment pins.
(47) Attach the cylinder to the hub with washers and bolts, evenly spaced. Refer to

Table 3-4, O-ring and Propeller Mounting Hardware Identification.

(48)  Tighten the bolts until snug.
(49)  Remove the threaded, headless alignment pins TE159.
(50)  Install the remaining washers and bolts, except two.
(51)  Torque the cylinder mounting bolts in accordance with Table 3-3, Torque

Values.

(52) Check the blade travel

(a) Using a digital protractor TE97, zero it out on the cylinder mounting flange.

(b) Line up the protractor with the reference tape on the blade.
(c) Check the total blade travel from full forward to full reverse.

Acceptable blade tolerance at full forward pitch is 35 degrees

+/- 5 degrees.

Acceptable blade tolerance at full reverse pitch is -35 degrees

+/- 5 degrees.

(53) Sealing the parting lines between the hub, cover plate, and cylinder - 6 Blade

Only
(a) Using masking material, mask the area outside of the seams between the

cover plate, the cylinder mounting flange, and the hub.

(b) Apply sealant CM8 or CM9, to the edges of the cover plate and the

cylinder mounting flange.

(54) Oil fill the hub - 6 Blade Only

(a) Using masking material, mask the edges of the cylinder mounting flange

to prevent red-dyed oil from leaking onto the hub surfaces.

(b) Mix 3.75 quarts of oil CM302 and red dye CM210 to a ratio of 256 to 1.
(c) Using one of the cylinder attaching bolt holes without a bolt and washer

installed, insert the red-dyed oil into the hub cavity.

(d) Remove the masking material.
(e) Using solvent, remove any excess red-dyed oil from the threads of the bolt

hole.

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(actual torque required) X (torque wrench length)

Torque wrench reading

(torque wrench length) + (length of adapter) = to achieve required actual

torque

Determining Torque Value When Using Torquing Adapter

Figure 3-11

APS0212A

0.50 foot

(152.0 mm)

1.00 Ft.

(305.0 mm)

Standard Torque

Wrench

Torquing

Adapter

100 ft-lb (136 N•m) x 1 ft. (305 mm)

1.00 ft. (305.0 mm) + 0.50 ft. (152.0 mm)

reading on torque wrench

with 6-inch (152.0 mm)

adapter for actual torque

of 100 ft-lb (136 N•m)

EXAMPLE:

66.7 ft-lb

(90 N•m)

The correction shown is for an adapter that is aligned with the centerline of the torque

wrench. If the adapter is angled 90 degrees relative to the torque wrench centerline,

the torque wrench reading and actual torque applied will be equal.

Page 3-27

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Diagram of Torquing Sequence for Propeller Mounting Bolts

5 Blade - Cylinder and Engine Flanges

6 Blade - Cylinder Flange Only

Figure 3-12 (1 of 2)

SEQUENCE A

SEQUENCE B

Use Sequence A for steps one and two.

Use Sequence B for step three.

Step 1

- Torque all bolts to 40 ft-lbs (54 N•m).

Step 3

-Torque all bolts in accordance with

Step 2

- Torque all bolts to 80 ft-lbs (108 N•m).

Table 3-1.

SEQUENCE A

TI-300-016

SEQUENCE B

TI-300-016

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Diagram of Torquing Sequence for Propeller Mounting Bolts

6 Blade - Engine Flange

Figure 3-12 (Page 2 of 2)

SEQUENCE A

SEQUENCE B

Use Sequence A for steps one and two.

Use Sequence B for step three.

Step 1

- Torque all bolts to 40 ft-lbs (54 N•m).

Step 3

-Torque all bolts in accordance with

Step 2

- Torque all bolts to 80 ft-lbs (108 N•m).

Table 3-1.

SEQUENCE B

SEQUENCE A

TI-300-104972

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(f)  Install the two bolts and washers in the remaining cylinder attaching holes.
(g)  Torque the bolts in accordance with Table 3-3, Torque Values.
(h)  Safety the cylinder/cover plate bolts with 0.020 inch (0.50 mm) or

0.032 inch (0.82 mm) stainless steel safety wire.

3. Propeller Assembly Installation

A. Propeller Installation

CAUTION 1: DO NOT USE METHYL-ETHYL-KETONE (MEK) TO CLEAN

PROPELLER SURFACES OR BLADE PARTS. MEK CAN WEAKEN

PAINT AND SEALANTS USED ON THE PROPELLER.

CAUTION 2: SURFACES MUST BE COMPLETELY CLEANED TO AVOID

FOREIGN OBJECT DAMAGE TO THE HUB AND FLANGE MATING

SURFACES.

(1) Using solvent CM23, clean the propeller flanges, stub shaft flange, and drive

shaft flange of oil and dirt.

(2) Permit solvent CM23 to dry.
(3) Lubricate and install one each of the manufacturer's supplied O-rings on the

drive shaft flange and on the stub shaft flange.

(4) Install the previously removed Hovercraft stub shaft onto the cylinder mounting

flange in accordance with the Hovercraft manufacturer's instructions.

(5) Install the washers and the bolts on the stub shaft flange and tighten in a

cross-wise pattern. Refer to Table 3-4, O-ring and Propeller Mounting Hardware

Identification

for mounting hardware.

(6) Use a torque wrench and a torque wrench adaptor TE5, TE155, or equivalent

to torque all bolts in sequences and steps shown in Figure 3-12. Refer to

Table 3-3, Torque Values and Figure 3-11 to determine the proper torque value.

(7) Safety wire the bolts with 0.020 inch (0.50 mm) or 0.032 inch (0.82 mm)

stainless steel safety wire.

(8) Install the drive shaft onto the propeller assembly in accordance with the

Hovercraft manufacturer's instructions.

(9) Install the washers and the lock nuts on the drive shaft and tighten in a

cross-wise pattern. Refer to Table 3-4, O-ring and Propeller Mounting Hardware

Identification

for mounting hardware.

(10) Torque the lock nuts in sequences and steps shown in Figure 3-12, in

accordance with Table 3-3, Torque Values.

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WARNING:

MAKE SURE THAT ANY SLING USED RATED UP TO 800 LBS

(363 KG) TO SUPPORT THE WEIGHT OF THE PROPELLER

ASSEMBLY DURING INSTALLATION.

CAUTION:

EXTREME CARE MUST BE TAKEN WHEN INSTALLING THE

PROPELLER ON THE HOVERCRAFT TO PREVENT DAMAGE TO

THE SHAFT AND/OR MOUNTING STUDS AND BLADES.

(11) Install the drive shaft, propeller, and stub shaft assembly onto the Hovercraft in

accordance with the Hovercraft manufacturer's instructions.

B. Beta Manifold Assembly Installation

(1) If not already installed, apply a thin coating of oil to the beta manifold assembly

O-rings, refer to Table 3-4, O-ring and Propeller Mounting Hardware

Identification, and install them in the grooves of the beta manifold support

assembly.

(2)  Carefully clean the inner side of the stub shaft with solvent.
(3)  Permit the solvent to dry.
(4)  Apply a thin coat of aviation grade engine oil to the beta manifold assembly.
(5)  With the housing seal and spiral ring removed, slide the beta manifold

assembly onto the propeller stub shaft.

(6) Align the attachment holes in the stub shaft with the holes in the beta manifold

assembly.

(7) Apply sealant CM46 to the washer and screw and attach the beta manifold

assembly. Refer to Table 3-4, O-ring and Propeller Mounting Hardware

Identification.

(8) Torque the bolts in accordance with Table 3-3, Torque Values.
(9) Safety the bolts with 0.020 inch (0.50 mm) safety wire.

CAUTION:

MAKE SURE THE SEAL HOUSING IS INSTALLED CHAMFER

SIDE UP.

(10) Apply a thin coat of aviation grade engine oil to the seal housing (not a Hartzell

Propeller Inc. part) and carefully slide it into position, chamfer side up.

(11) Secure the sleeve with the spiral retainer ring, refer to Table 3-4, O-ring and

Propeller Mounting Hardware Identification.

(12) Attach the drain hose to the manifold in accordance with the Hovercraft

manufacturer's instructions.

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C. Beta Tube Installation

(1) Prepare the beta tube for installation.

CAUTION:

USE CARE TO AVOID SCRATCHING OR DAMAGING THE

BETA TUBE WHILE INSTALLING IT.

(a)  Remove the cover from the beta tube.
(b)  Using solvent CM23, clean the beta tube.
(c)  Permit the solvent CM23 to dry.
(d)  Apply a thin coating of aviation grade engine oil over the entire length of

the beta tube.

CAUTION:

THE PROPELLER MUST NOT REACH THE INTERNAL HARD

STOPS DURING NORMAL OPERATION OF THE PROPELLER.

THE MAXIMUM PITCH MUST BE LIMITED BY THE TRAVEL OF

THE BETA TUBE.

(2) Before operating the propeller, turn the blades several times by hand from

reverse pitch to forward pitch position to make sure the blades will turn freely.

(3) Move the blades to flat pitch.

(4) Install the beta tube into the beta manifold assembly and move it in and out,

rotate it to make sure it moves with no binding.

(5) Connect the beta tube to the linkage in accordance with the Hovercraft

manufacturer's instructions.

CAUTION:

USE CARE NOT TO BEND OR DAMAGE THE BETA TUBE WHILE

PERFORMING HYDRAULIC CONNECTIONS.

(6) Complete all necessary hydraulic connections in accordance with the

Hovercraft manufacturer's instructions.

D. Propeller Operation

WARNING 1: BEFORE OPERATING THE PROPELLER, CHECK ALL BOLTS,

SCREWS, AND NUTS FOR PROPER TORQUE AND SECURE

THE HOVERCRAFT IN ACCORDANCE WITH THE HOVERCRAFT

MANUFACTURER'S INSTRUCTIONS.

WARNING 2: MAKE SURE OF THE SAFETY OF PERSONNEL AND CLEAR THE

DECK IN FRONT OF THE PROPELLER BEFORE OPERATING THE

HOVERCRAFT.

CAUTION:

MAKE SURE THE PRESET HYDRAULIC PRESSURE IS AT THE

CORRECT LEVEL BEFORE OPERATING THE HOVERCRAFT

ENGINE.

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4. Propeller Assembly Removal

A. Beta Tube Removal

CAUTION:

USE CARE NOT TO BEND OR DAMAGE THE BETA TUBE WHILE

DISCONNECTING HYDRAULIC CONNECTIONS.

(1) Disconnect all necessary hydraulic connections in accordance with the

Hovercraft manufacturer's instructions.

(2) Disconnect the beta tube from the linkage in accordance with the Hovercraft

manufacturer's instructions.

(3) Remove the beta tube.

B. Beta Manifold Removal

(1)  Remove and discard the spiral retainer ring that secures the seal housing.
(2)  Remove the seal housing.
(3)  Remove and discard the screws and washers attaching the beta manifold

assembly.

(4) Remove the beta manifold assembly.

C. Propeller Removal

WARNING:

MAKE SURE THE SLING IS RATED UP TO 800 LBS (363 KG)

TO SUPPORT THE WEIGHT OF THE PROPELLER ASSEMBLY

DURING REMOVAL.

CAUTION:

EXTREME CARE MUST BE TAKEN WHEN REMOVING THE

PROPELLER ON THE HOVERCRAFT TO PREVENT DAMAGE TO

THE SHAFT AND/OR MOUNTING STUDS AND BLADES.

(1) With the drive shaft and stub shaft attached, remove the propeller assembly

from the Hovercraft.

(2)  Remove the safety wire from the bolts on the stub shaft.
(3)  Remove and discard the bolts and washers from the stub shaft.
(4)  Remove and discard the lock nuts and washers from the drive shaft.
(5)  Remove the drive shaft in accordance with the Hovercraft manufacturer's

instructions.

(6) With a propeller sling and mobile hoist, carefully remove the propeller assembly

from the stub shaft.

(7) Place the propeller on a suitable cart for transportation.

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5. Disassembly of a Propeller for Shipment

A.  Place the propeller on the build bench or stand.
B.  Remove and discard the safety wire from the cylinder mounting bolts.
C.  Remove the cylinder mounting bolts from the hub.

CAUTION:

USE CAUTION WHEN REMOVING THE CYLINDER FROM THE

COVER PLATE. EXCESS OIL MAY SPILL OUT.

D.  Remove the cylinder from the cover plate.
E.  Install four (4) headless pins in the cover plate, evenly spaced.
F.  Rotate the blades to reverse pitch to expose the piston.
G.  Break the torque on the piston.
H.  Remove the piston.
I.  Remove the propeller from the build stand and place the propeller assembly over a

large bucket or container.

J. Break the torque on the pitch change rod.
K. Remove the pitch change rod and permit the oil to drain into the large bucket or

container.

L.  Place the propeller on the build bench stand.
M.  Remove the headless pins.
N.  Using a rubber hammer, put a delrin wedge between the cover plate and hub and

gently tap the wedge to remove the cover plate.

O.  Remove the anti-rotation rods.
P.  Move the blades to the full forward position.
Q.  Loosen the jam juts and set screws on the preload plate.

R. Move the blades to flat pitch.

S.  Put the blade stands TE126, or equivalent, in place to support the blades.
T.  Remove the inner hub clamping bolts.
U.  Remove the hub clamping bolts and pitch lock brackets.
V.  Remove the cylinder side hub half.
W.  Remove two blades.

(1) Carefully wrap or tape the blade shank of each blade to keep the bearings and

races together.

X. Remove the fork.

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Y. Remove the remaining blades.

(1) Carefully wrap or tape the blade shank of each blade to keep the bearings and

races together.

Z. Put a round cardboard template piece in each blade socket of the hub.
AA. Install the fork inside the hub.
AB. Put the anti-rotation rods in the fork to hold it in place.
AC. Attach the cylinder side hub half.
AD. Install the inner hub bolts in the hub and tighten until just snug.

AE. Install the cover plate on the hub, flush with the hub.

AF. Install the pitch change rod.
AG. Install the piston (left-hand threads).
AH. Turn the pitch change rod (left-hand threads) until the rod bottoms out on the fork.
AI. Install the cylinder.
AJ. Install the cylinder mounting bolts and tighten until snug.
AK. Install all remaining hub bolts and tighten until snug.
AL. Put the remaining components in a bag and tag accordingly.
AM. Carefully package all components for shipment.

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1. Operational Tests

WARNING:

REFER TO THE HOVERCRAFT MAINTENANCE MANUAL FOR

ADDITIONAL PROCEDURES THAT MAY BE REQUIRED AFTER

PROPELLER INSTALLATION.

A. Initial Run-Up

(1) Following propeller installation, and before use, the propeller hydraulic system

must be purged of air and proper operation verified.

(2) Perform engine start and warm-up in accordance with the Hovercraft

manufacturer's operating instructions.

NOTE: Air trapped in the propeller hydraulic cylinder will cause pitch control

to be imprecise and may result in propeller surging.

(3) Cycle the propeller control throughout its operating blade angle range from

reverse or low, to high (Hovercraft manufacturer's operating instructions).

(4) Repeat this procedure at least three times to purge air from the propeller

hydraulic system and to introduce warmed oil to the cylinder.

(5) Verify proper operation from reverse pitch to forward pitch and throughout the

operating range.

(6) Shut down the engine in accordance with the Hovercraft manufacturer's

operating instructions.

B. Post-Run Check

(1) After engine shutdown, check the propeller for signs of engine oil leakage.

Operation, Maintenance Manual, and Logbook for Propeller Systems HM-5V1-B1000-A, HM-6V1-A1000-A (2018) - page 2