3522.5-0000010 РЭ
155
The force applied to the carrier mounting bolts should be between 140 and 160 N. .
It is necessary to repeat force check operation three times in each direction to determine
average value.
If force of wheel hub drive turning is under 60 N, before pivot bearings 36 preload
adjustment it is necessary to dismount bottom axle 37 and to check technical condition of
bottom pivot bearing.
If force of turning is between 60 N and120 N, it is necessary to make pivot bearings
preload adjustment in the following order:
– check up bolts 4 tightening force, that should be between 160 and 180 Nm×;
– turn out four bolts 4 fastenings upper pivot axle;
– by means of extracting bolts raise upper axle 37 and reach the necessary bear-
ings 36 preload by removal of shim washers 2 of identical thickness from both parties of
axle flange;
– tighten axle fastenings bolts 4 with a moment of 160…180Nm and the bolts
should be tightened crosswise with obligatory turning from side to side of wheel hub drive;
–check again pivot bearings preload by means of check of reduction unit turning
force in both directions;
– repeat above mentioned work for the other wheel reducer.
After adjustment make lubrication of a wheel hub drive. Pump lubrication through
oilier 6 as long as it will come through special hole located in end face of a sealing holder
39.
After bearings adjustment and lubrication of pivot connection mount removed from
FDA parts in reverse order. Tighten nuts fastening steering cylinder with moment of 180 …
200 Nm and nuts fastening of steering rod with the moment of 110 …130 Nm×.
Next checkings and, if necessary, adjustments of axial preload in pivot conic bear-
ings make every:
- 250 hours at tractor operation with doubled front wheels;
- 500 hours at operation with single wheels.
ATTENTION: NON-OBSERVANCE OF MAINTENANCE REGULATIONS FOR
PIVOT BEARINGS CAN LEAD TO THEIR PREMATURE FAILURE, ESPECIALLY, AT
USE OF DOUBLED FRONT WHEELS. AT OPERATION WITH DOUBLED FRONT
WHEELS IT IS NECESSARY TO OBSERVE STRICTLY THE REQUIREMENTS STATED
IN SUBSECTION 3.14 “UNDERCARIGE AND TRACTOR WHEELS “!
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