CAR RUNNING-IN
Service life and reliability of the units and devices, exploitation efficiency of the truck mostly
depends on the work of the truck parts during the initial period of exploitation.
During the car running-in it is necessary to watch over the fixtures condition, to tighten the
loosened bolted and other connections, to watch over the aggregate heat and if it is high to find the
reason of the disrepair and eliminate it.
On new trucks and after wheel changing it is necessary to tighten the wheel nuts when the
mileage is about 50 kilometers. And at first it is necessary to tighten the wheel nuts with the same
tightening torque until proper bearing won’t be reached.
The car running period for new trucks is 2000 kilometers.
For the car running period the following restrictions are established:
– it is necessary to run the truck in the spare condition;
– the mass of the carried cargo shouldn’t overtop 60% of the nominal mass of the cargo;
– it is necessary to drive the track on each gear at speed not exceeding ¾ of the limit top
speed or acceptable engine speed.
– After the haul of 2000 kilometers speed can be increased up to full speed or up to maximum
acceptable motor speed.
It is necessary to service the engine, the clutch and the gear box during and after the car-running
in accordance with the manufacturer instruction.
During the initial period when the haul is 2000 kilometers it is necessary to:
1 check the flange fixture of the driveshaft and the needle bearing
2 check the bearing fixture of the driveshaft
3 check hermiticity of the: cooling system, steering control system, driving axels, pneumatic
brake system, lifting system of the cabin platform and platform, heating system, drive clutch.
4 check the nut splinting of the steering link ball stud, of the brake chamber crutch studs.
Eliminate disrepairs (if necessary).
5 check the backlash in the hinges of the steering links and if necessary regulate it.
6 check the wheel nuts (including the nuts of the spare wheel and of the spare wheel bracket)
and tighten them if necessary.
7 check visually the tires and discs; check and regulate air pressure in the tires.
8 check the nuts gripping of the U-bolt.
9 check the nuts gripping of the front spring figure wedges.
10 check the bolt torqueing of the rear suspension :
– for the spring: of the wheel bolt nuts of the centerpoint suspension to the frame, of the rod
nuts, of the rod bracket nuts, of the shaft stabilizer nuts;
– for the pneumatic suspension: of the torque rod nuts, of the bolts of the pneumatic tanks
covers, of the suspension bar bolts.
11 check visually the fixation and the splinting of the shock absorber. And if it’s necessary to
eliminate the faultiness.
12 check the state and the tightening of the rubber pipe joints of the engine system by air and
if it is necessary to tighten the joints.
13 serve the storage battery (Произвести обслуживание АКБ ( it is necessary to dust, to check
the level and density of acid, to check the cable terminals joint with the binding posts and their
oiling).
14 check the nuts gripping of the bracket fixation and frame crossbars, and tighten the if
necessary.
15 check and if necessary regulate clutch pedal free travel.
16 check the gearbox actuator arm for play in the gearbox actuator, regulate it if necessary and
eliminate the plays.
17 check the petrol volume and change oil in the units and automobile systems according to the
lubrication chart.
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