Possible Failures In Rear Power Take-Off Shaft And Instructions For Their Troubleshooting - Belarus 1523.5 Operator's Manual

6.5 Possible failures in rear power take-off shaft and instructions for their trouble-
shooting
The list of possible failures of rear power take-off shaft and instructions for their trouble-
shooting are shown in Table 6.5.
Table 6.5
Failure, external manifestation,
cause
Rear PTO shaft end extension fails to rotate while activation
PTO mode shifting handle is not en-
gaged in the independent drive posi-
tion
Improper adjustment of valve control Adjust valve control
There is no oil pressure at valve in-
put or at valve output to PTO fric-
tion coupling
Rear PTO shaft fails to transmit full torque ("skidding")
Improper adjustment of valve control Adjust valve control
Low oil pressure in the transmission
hydraulic system
Low oil pressure at valve output to
PTO friction coupling due to exces-
sive internal leakage
Friction coupling operation failure
due to piston deadlock or wear and
tear of frictional disks
While the PTO brake engagement, the shaft end extension goes on rotating
There is no oil pressure at valve in-
put or at the output to the PTO
brake
Low oil pressure at the output to the
PTO brake due to excessive internal
leakage
Brake operation failure due to piston
deadlock or wear and tear of fric-
tional disks
Heavy bending load on the shaft
end extension from the coupled im-
plement drive (out-of-limit angles of
cardan shaft and etc.)
Twisting of splines (teeth) of the PTO shaft end extension
Impact load generated by coupled
implement, that is transmitted to the
PTO shaft end extension
Application of the PTO shaft end
type having unsuitable horsepower
capacity for the coupled implement
drive
Check and shift the handle in upper position
Check pressure at control valve input, in case there
is no pressure correct the failure of the transmission
hydraulic system. In case there is no pressure at
valve output to PTO friction coupling - replace the
control valve
Adjust pressure reducing valve of the transmission
hydraulic system or correct other failures in the
transmission hydraulic system
Check oil pressure running to PTO friction coupling,
replace friction coupling O-rings, if necessary
Rinse friction coupling components in pure diesel
fuel, replace frictional disks, if necessary
Check pressure at control valve input, in case there
is no pressure – eliminate the transmission hydraulic
system failures. In case there is no pressure at valve
output to the PTO brake - replace the control valve
Check oil pressure running to the PTO brake, replace
brake piston O-rings, if necessary
Rinse brake components in pure diesel fuel, replace
frictional disks, if necessary
Bent fracture of the PTO shaft end extension
Eliminate breaks of coupling requirements. Correct
failures in the machine, replace the PTO shaft end
extension
Check availability and operability of safety elements
of the coupled implement (torque-limiting clutch,
shear bolt) and eliminate the failure, replace the PTO
shaft end extension
Install the PTO shaft end of corresponding horse-
power capacity required by the implement drive (from
the set supplied with SPTA)
Troubleshooting
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1523.5-0000010 OM