Possible Failures And Instructions For Their Troubleshooting; Possible Clutch Failures And Instructions For Their Troubleshooting - Belarus 922.6 Operator's Manual

6. POSSIBLE FAILURES AND INSTRUCTIONS FOR THEIR TROUBLE-
SHOOTING

6.1 Possible clutch failures and instructions for their troubleshooting

The list of possible failures of tractor "BELARUS-922.6" and instructions for their
troubleshooting are shown in table 6.1.1.
Table 6.1.1.
Failure,
external manifestation, cause
Clutch coupling does not transmit full torque ("clutch skidding")
There is no clearance between the clutch
release bearing and release levers –
"clutch is half disengaged" (insufficient
clutch pedal free travel)
Partial engagement of clutch coupling
(clutch lever 35 (Figures 5.4.19) fails to
return to its initial position) when the
clutch pedal is released, due to failure in
clutch operation control
Clutch driven disk facings are worn out
Clutch driven disk facings are oiled-up
due to ingress of oil into the dry section
Poor compression spring force (spring
shrinks due to continuous skidding and
clutch overheating)
Clutch coupling cannot be fully disengaged ("clutch grabs and shudders")
Clearance between the clutch release
bearing and release lever is increased
(increased clutch pedal free travel)
Insufficient clutch lever 25 travel (Figure
5.4.19) when the clutch pedal is fully de-
pressed
Misalignment of release levers
Excessive warping of driven disks
Blocking of driven disk hub on transmis-
sion shaft splines
Damaged transmission shaft support
bearing in the flywheel
Clutch lever 25 (Figure 5.4.19) fails to go back to its initial position when the clutch
There is no clearance between piston 10
(Figure 5.4.19) and pusher 9 of piston 10
of main cylinder 11
Sticking of the main cylinder 11 piston 10
(Figure 5.4.19) due to piston cup expan-
sion, resulting in closure of compensating
port "А" (Figure 6.1.1) of cylinder NP LLC
FENOX.
Blocking of the main cylinder piston due
to piston cup and O-ring expansion
Adjust the clearance as specified in clause
5.4.2.11 "Operation 29. Check / adjustment of
clutch control"
Detect and eliminate the cause of failure, per-
forming the operations indicated for trouble-
shooting "Clutch lever 25 (Figure 5.4.19) fails to
return to its initial position while releasing the
clutch pedal"
Change facings or driven disks assembled
Detect and eliminate the cause of oil ingress into
the dry compartment
Change compression springs
Adjust the clearance between the clutch release
bearing and release lever according to clause
5.4.2.11 "Operation 29. Check / adjustment of
clutch control"
Ensure the clutch lever full travel performing the
operations specified for troubleshooting "Clutch
lever 25 (Figure 5.4.21) full travel is not provided
when the clutch pedal is depressed"
Adjust the position of release levers
Replace driven disks
Condition the surface of splines by grinding en-
suring free movement of disks on the transmis-
sion shaft
Replace the transmission shaft support bearing
pedal is released
Adjust the clearance according to point 5.4.2.11
"Operation 29. Check / adjustment of clutch con-
trol"
Use of incorrect hydraulic-brake fluid or ingress
of mineral oil, petroleum, kerosene, diesel fuel
into hydraulic-brake fluid. Rinse the hydraulic
drive system with brake fluid. Replace the main
and operating cylinders. Replace brake fluid.
Bleed the hydraulic system with brake fluid
167
922.6-0000010 OM
Troubleshooting