pins of transverse and vertical steer鄄
ing pull rods, release bearing of
clutch, parking brake and door
hinges.
(芋) 2nd class maintenance
2
nd
class maintenance concentrates
on inspection, adjustment, lubrica鄄
tion; besides items in 1
st
class main鄄
tenance, the following items should
be done:
1. Check air pressure in the cylinder,
remove carbon deposits in the com鄄
bustion chamber, and measure
abrading degree of the cylinder.
2. Check seal condition of the valve,
adjust valve clearance, do adjusting
and rubbing if necessary, and then
readjust.
3. Replace engine oil, fine mesh filter
element and seal rings, and wash lu鄄
brication system of engine.
4. Check and adjust angle of ad鄄
vance of the diesel engine; check
injection pressure and atomization
condition of the fuel injector; wash
the oil tank.
5. Check whether the thermostat
works normally; check drip condition
of the draining hole of the water
pump.
6. Check whether vent -pipe of the
crankcase is complete and fastened.
7. Check working condition of the
generator and starter; especially
check whether electric brush and
commutators abrade.
8. Check and adjust separating
clearance of the clutch
9. Readjust clearance between fric鄄
tion disc of service brake and the
brake as well as clearance between
friction disc of parking brake and the
brake.
10. Tighten bearing cover of trans鄄
mission; check whether shifting of
transmission is normal. Check and
lubricate odometer hose.
11. Clean and replace gear oil for
transmission, rear axle and steering
gear.
12. Check the frame for cracks,
check the bolts for looseness, check
whether parts of cab and carriage
are complete, check whether the de鄄
vices are fixing.
13. Jack up the vehicle to make front
and rear wheel off ground; start the
engine, after the engine is heated,
accelerate in interval and listen
whether there is any abnormal noise
in the engine, watch whether there is
any abnormal noise in the transmis鄄
sion system, shaking and swaying of
the wheels, and other parts.
(郁)Seasonal maintenance
In order to make some parts meet
the requirements of climate change
in aspects of technique and working
requirement, seasonal maintenance
should be added in summer and
winter.
At the beginning of summer:
1. Clean cooling system up and re鄄
move scale in it.
2. Use lubricant for summer.
3. Fueling with #0 light diesel oil
specified in GB252.
4. Clean up the battery and adjust
the specific gravity of electrolyte.
At the beginning of winter:
1. Clean up the accumulator and ad鄄
just the specific gravity of electrolyte,
and then remove the accumulator
and charge it.
2. Install cold -proof devices; install
antiskid devices if necessary.
3. Fueling with #10 light diesel oil
specified in GB252.
( 吁 ) Items to notice in
breaking-in period
Proper breaking -in of new vehicle
has a great influence on prolonging
vehicle lifespan and improving relia鄄
bility and economy of vehicle.
Mileage of breaking -in is 2000 -
2500km, and the following specifica鄄
tions should be executed during
breaking-in period.
1. Before breaking-in period
1) Wash the vehicle with water, and
check whether all bolts and nuts are
tightened.
2) Check whether there is enough
water in the radiator, and whether
quantity of lubricants in engine,
transmission, rear axle, and steering
gear as well as liquid levels in bat鄄
tery and oil reservoir conform to
specification; Check pipeline joints
for leak.
3) Check whether start system尧driv鄄
ing system, and steering system
work normally.
HFC1045
series trucks
72
73