Adjustment
1. Adjustment of front hub bearing.
To adjust front hub bearing in axial
retightening force, tighten fastening
nut with wrench, and loosen knuckle
nut for about 120毅 . Rotate the hub
clockwise and anti-clockwise, make
sure that roller against the tapered
face of bearing outer race properly,
then tighten nut to the position where
the rabbet aims the split pin hole.
Check the hub if it can rotate freely
and don't swing a lot. Now, distort
the split pin and fix it.
2. Adjustment of clearance between
knuckle and front axle. The clearance
is adjusted via adjusting shim, it
should less than 0.1mm, and the
number of shim should not more than
2 pieces.
3. Adjustment of toeing-in. The toe鄄
ing-in can be adjusted via adjusting
tie rod. Park the vehicle on a flat
ground, jack up its header and orient
front wheels just as vehicle run for鄄
ward. Loosen locking nuts of tie rod,
rotate the tie rod utile the toeing-in fit
the sp ecified size. Then tighten the
locking nuts with torque of 107 ~
127N窑m.
Steering system
General structure
The steering system of this series of
truck is non-power steering system.
The s teering system composed of
steering control mechanism, linkage
mechanism and steering gear. See
the figure on the right.
Operation inspection for ste -
ering mechanism
1. Put front wheels on a swivel table.
2. Rotate steering wheel clockwise
1尧steering wheel;
2尧steering shaft and
universal joint assembly
3尧adjustable bracket; 4尧steering gear
5尧dust cover;
6尧column cover
7尧longitudinal member; 8尧drag link
steering system
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HFC1020
series trucks
and anti -clockwise to its limit posi鄄
tion, to detect if it is fluent.
3. Let engine run in idle speed and
check steering wheel for free play.
The limit value of this free play is 10~
15mm. Rotate the adjusting screw
clockwise to decrease the free play,
while rotate anti -clockwise to in鄄
crease.
4. When engine run in idle speed,
the torque of steering wheel should
be around 19.5N.
Use & Maintenance
1. Don't steer when parking, since it
will shorten useful life of parts.
2. Check free play of steering wheel
every 1000km (always let engine run
in idle speed when do this opera鄄
tion). The limit value of this free play
is 10~15mm. Rotate adjusting screw
if the free play beyond this limit. Ro鄄
tate it clockwise to decrease the free
play, while rotate anti -clockwise to
increase.
3. Check steering gear box for oil
level every 3000km. Oil level should
not be 20mm below the lower edge
of filler hole. Disassemble and clean
steering wheel two times every year
at beginning of spring and autumn,
replace oil and adjust seasonally.
4. The free play of steering play
should not be too small, since a
small free play will make it hard to
return and bring a worse stability in
high speed.
5. Fill the steering gear box with hy鄄
perbolic -gear oil, don't mix it add
other oil.
Brake system
The brake system of this series truck
is composed of parking brake sys鄄
tem and running brake system.
Parking brake system
General Structure
The parking brake system includes
control lever, pull wire, and parking
brake, as the last figure. Parking
1尧control lever 2尧pull wire
3尧frame
4尧parking brake
parking brake system
control mechanism
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