KPS-18T
Trouble shooting
2006.7.19
1
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
Malfunction Check Cause Measures
3
Defective of
charge pump
Exchange charge pump
assy or rotor cmp
Main pressure of pump
Defective of
charge relief valve
Exchange charge
relief valve cmp
Defective of
check valve
Exchange CR-valve
Exchange valve plate
or pump unit
Examine cooler and oil
Damage of
valve plate
Defective of charge
Damage of
piston
Excessive inside leakage
Exchange cylinder
block cmp or
Pump unit
Examine cooler and oil
Damage of
cylinder block
*3
clogging of filter
Exchange filter
and oil of tank
Defective of motion
in motor unit
Exchange motor unit
or inner parts of motor
Motor unit
Motion of linkage
to pump unit
Defective of linkage
to pump unit
Adjust linkage
to pump unit
Stroke of
pump lever
Damage of
pump lever
Tightening screw of
lever or exchange
pump lever
Defective of motion
in pump unit
Exchange pump unit
or inner parts of pump
Although vehicle moves
forward and reverse,
moves at low speed only.
Oil leakage from
piping or hose
Damage of
seal surface
Exchange case
or joint
Damage of piping
or hose
Exchange piping
or hose
Malfunction Check Cause Measures
Opening of bypass valve
or damage of O-ring
Close bypass valve or
exchange bypass valve
Bypass valve of pump
4
Opening of check valve
by contamination
Close bypass valve or
exchange bypass valve
CR valve cmp of pump
*1
*2
*3
Defective of motion
in motor unit
Exchange motor unit
or inner parts of motor
Motor unit
Vehicle does not stop
when lever of vehicle
is neutral position.
Remove linkage
from pump lever
Defective of
linkage
Difference of
neutral adjustment
Adjust pump lever
to neutral position
Repair or adjust
vehicle linkage
Defective of
lever
Tightening screw of
lever or exchange
pump lever
Abnormal sound,
abnormal vibration
Piping or linkage
contacting of piping
or linkage
Repair or adjust or
exchange piping
or linkage
*2
*1
Malfunction Check Cause Measures
5
Oil leakage Piping and hose
Looseness of
piping or hose
Tightening
piping or hose
Plug or bolt or filter
Looseness of plug
or bolt or filter
Tightening plug
or bolt or filter
Seal Damage of seal Exchange seal
Case Damage of case Exchange case
Damage of
piping or hose
Exchange piping
or hose
Porosity of case Exchange case
Efficiency decline
of oil cooler
Maintain present
condition,
observe progress
Cleaning, repair,
exchange of oil cooler
Temperature rise
by over load
Abnormal rise
of oil temperature
Oil cooler
Confirm whether
the abnormal rise
of oil temperature
reproduces.
*1
*2
*3
Defective of motion
in motor unit
Exchange motor unit
or inner parts of motor
Motor unit
Malfunction Check Cause Measures
Malfunction of
solenoid valve
Exchange
solenoid cmp or
spool cmp or spring
Malfunction of
pressure valve
Exchange
pressure valve cmp
PTO pressure
Damage of pipe
or O-ring
Exchange piping
or O-ring
Damage of
clutch cylinder
friction plates
Exchange
clutch cylinder cmp
Malfunction of
solenoid valve
Exchange
solenoid cmp or
spool cmp or spring
PTO pressurePTO shaft doesn’t stop
Damage of brake
friction plates
Exchange friction plates
Clutch cylinder
Brake of inertia
Defective of
connection
Connect or repair of
electric wire
Vehicle can move
forward and reverse
normally.
However PTO shaft
doesn’t turn
Connection of
electric wire
Abnormality of
the voltage
Exchange battery or
charge of battery
The voltage
of battery
6
Loading...