Possible Failures In Gearbox And Instructions For Their Troubleshooting - Belarus 2022.6 Operator's Manual

6.2 Possible failures in gearbox and instructions for their troubleshooting

The list of possible failures in gearbox and instructions for their troubleshooting are
shown in Table 6.2.1
Table 6.2.1
Failure,
external manifestation, cause
Tractor fails to start in any gear, the transmission hydraulic system
Wear of clutch shaft spline joint,
primary shaft or a coupling bushing
Wear of transmission yoke plate or
clutch
Synchronizer damage
"L-H" pass of GB reduction unit can not be engaged
Sticking or failure of the hydraulic
cylinder valve for control of switch-
ing of GB reduction unit pass
The cylinder of GB reduction unit
pass shifting is not adjusted
Synchronizer for GB reduction unit
shifting is damaged
Not enough oil in the transmission
Wear or damage of bearings and
other transmission components
The engine fails to start when the range shifting lever is set in neutral position or
Faulty switch for engine start-up
lock with the range engaged
The switch for engine start-up lock
with the range engaged is not ad-
justed
A range can not be engaged or becomes self-disengaged
Wear of transmission yoke plate or
clutch
Incomplete clutch coupling disen-
gagement (clutch grabs and shud-
ders)
Wear of synchronizer conic sur-
faces
Oil leakage in the dry compartment of the clutch coupling casing
Oil leakage through connection:
bowl ⎯ cover ⎯ case, or through
connection: shifter
clutch coupling case
Oil leakage through cups
operates properly
Disconnect the tractor, disassemble the clutch
case and gear-box casing, replace worn-out parts
A gear can not be engaged
Disconnect the tractor, dismount the gearbox and
replace worn-out parts
Disconnect the tractor, dismount the gearbox and
replace worn-out parts
Rinse the valve spool. Replace the valve if neces-
sary
Adjust the cylinder of GB reduction unit pass shift-
ing
Replace the synchronizer and worn-out parts
Increased noise
Refill oil up to the required level mark
Replace worn-out bearings and other damaged
parts
starts when a range is engaged
Replace the switch for engine start-up lock with the
range engaged
Adjust the switch for engine start-up lock with the
range engaged
Disconnect the tractor, dismount the gearbox and
replace worn-out parts
Noisy gear shifting
Adjust clutch coupling according to subsection 6.1
Replace worn-out parts
Disconnect the tractor in order to detach the en-
gine from clutch coupling case and stop leakage
⎯
bracket
Disconnect the tractor in order to detach from
clutch coupling case and replace the cups
189
2022.6-0000010 OM
Troubleshooting