Service Manual

Malfunction Check Cause Measures
Vehicle does not move
forward and reverse.
Input speed
of pump unit
Defective of input
from engine
Wear of input spline Exchange input shaft
Repair parts between
engine and pump unit
Normal
Opening of bypass valve
or damage of O-ring
Close bypass valve or
exchange bypass valve
Bypass valve of pump
2
*1
Abnormal
Oil quantity in tank
Lack of
oil quantity
Supply oil to tank
*2
Motion of linkage
to pump unit
Defective of linkage
to pump unit
Oil condition in tank
Damage piping
(suction)
Exchange piping
(suction)
Increase of
oil viscosity by
low temperature.
Warming up
Increase of
oil viscosity
by deterioration.
Exchange oil of tank
and examine cooler
Containing air with oil Supply oil to tank
Suction line
Oil leakage from
piping or hose
Damage of
seal surface
Exchange case
or joint
Damage of piping
or hose
Exchange piping
or hose
Opening of check valve
by contamination
Close bypass valve or
exchange bypass valve
CR valve cmp of pump
Repair or adjust
linkage