48
cross shaft gimbals with it; upper
section and lower section of it are
connected with square splines, ex鄄
tension journey of which is 100mm to
ensure cab tilting. Redirector of this
kind is highly efficient, operates ag鄄
ilely, wears little and durable.
Using and maintenance
1. Turning the steering wheel to ex鄄
treme end at starting position is for鄄
bidden.
2. Check free stroke of the turning
angle of the steering wheel after ev鄄
ery 1000km爷s running as the vehicle
is under loading; the turning angle
should be 依150, if beyond this scale,
it should be adjusted. Check con鄄
necting points of the redirector for
looseness before adjusting; when
adjusting, adjust the clearance be鄄
tween segment gear of the rocker
arm shaft and gear of the steering
nut, namely, loose tightening nut of
the adjusting screw. Turn the screw
clockwise to make turning angle of
the free stroke of the steering wheel
less than 依150 , and then tighten the
tightening nut. If free stroke of the
steering wheel is still more than 依150
after adjusting, remove redirector
from the vehicle, and remove the up鄄
per cover, decrease thickness of the
adjusting shim properly to eliminate
axial clearance of the steering screw,
at last, install the upper cover.
3. Check oil level of the redirector af鄄
ter every 3000km爷s running; the
redirector should be removed and
washed in spring and autumn and
seasonal oil replacing should be ad鄄
justed.
4. Gear oil for hyperbola gear should
be filled into the redirector, and lu鄄
bricant not conforming to the require鄄
ment is forbidden to use.
Power steering system渊Optional冤
1. Brief description of structure
Power steering system is mainly
made up of steering control mecha鄄
nism, integrated power steering (as
shown in the right diagram), power
steering cylinder and power steering
pipeline.
Steering energy source of the power
steering mechanism comes from en鄄
ergy of the driver as well as engine
power. Usually, when the power de鄄
49
vice is ineffective, the driver can ex鄄
ecute steering independently. There鄄
fore, comparing with common me鄄
chanical steering system, power
steering system is agile, reliable and
safe, which will reduce fatigue of the
driver greatly.
2. Inspection process of working con鄄
dition of the steering mechanism.
1) Place front wheel of the vehicle on
the swivel table.
2) Turn the steering wheel to extreme
ends of both sides to check whether
the steering wheel gets stuck or
there is any abnormal impedance in
turning.
3) Check free stroke of the steering
wheel as the engine is idling. Free
stroke of the steering wheel should
be 10要15mm, if it is more than 10要
15mm, turn the adjusting screw
clockwise, it decreases; while turn
anticlockwise, it increases.
4) The measured rotating force of the
steering wheel should be about
19.6N as the engine idles.
5) Check working condition of the
following switches: Start switch,
wiper switch, exhaust braking switch,
horn switch and combination switch.
3. Steps of air deflation for power
steering system
1) Add steering oil to power steering
oilcan (specified oil should be used)
2) After jacking up the front axle,
prop the frame with brackets.
3) Turn the steering wheel to extreme
ends of both sides for several times.
4) Check oil level in the power steer鄄
ing oilcan, add oil if insufficient. Check
whether the oil level is in the scale of
oil level in normal temperature.
5) Start the vehicle, and turn the
steering wheel to extreme ends for
several times as the engine is idling.
HFC1045
series trucks