jcb JS210 Service Manual

Fault Finding
Table 1.
95 - 1
Section E
Hydraulics
9803/6400
Section E
95 - 1
Issue 2*
Slew Motor
Symptom Cause External Inspection Countermeasure Repair
Internal damage to the Measure the oil drain High possibility of Refer to Table 2.
motor. volume. damage to the sliding
surfaces if the supply
volume is approximately
equal to the drain
volume. Dismantle and
inspect.
Internal damage to the Open the motor inlet and High possibility of Renew damaged parts
motor. outlet ports and apply internal damage to the or renew the motor
20 kgf/cm
2
(284 lbf/in
2
) motor if the supply shaft assembly.
pilot pressure to the does not rotate smoothly
brake release port. Try when this torque is
to rotate the shaft with applied. Dismantle and
a torque of approx. inspect.
39.32 Nm (29 lbf ft).
Relief valve in circuit not Measure pressure. Reset to the prescribed
set correctly. setting.
Wear or damage to the Measure the oil drain Leakage is too high if the Refer to table 2.
motor sliding surfaces or volume. oil drain volume exceeds
to the high-pressure seal. 5 l/min (1.1 gal/min).
Dismantle and inspect.
Oil hot and excessive Measure the oil Reduce the oil Refer to table 2.
leakage in the motor. temperature. temperature.
Seizure of motor sliding Check for any metallic If metallic matter is Repair or renew the
parts or circuit. matter deposited in discovered or the supply damaged parts. Renew
motor drain oil or drain shaft does not rotate the motor assembly.
filter. Apply a 30 kgf/cm
2
smoothly when torque is
(427 lbf/in
2
) pilot pressure applied, there is a high
to the brake release port possibility of internal
and try to rotate the shaft damage to the motor.
with a torque of approx. Dismantle and inspect.
39.32 Nm (29 lbf ft).
Damage or wear to oil Renew the oil seals.
seal lip.
Damage or wear of the Repair the problem or
shaft seal. renew the motor
assembly.
Abnormal pressure in the Check the pressure in the Set the pressure in the Renew the oil seal.
casing. casing and measure the casing below 3 kg/cm
2
. Repair or renew the
drain volume. (43 lbf/in
2
) Dismantle damaged parts. Renew
and inspect if drain the motor assembly.
volume is excessive.
Motor does not run
Excessive slipAbnormal heating
Leakage from oil seals

jcb JS210 Specifications

General

Brand	jcb
Model	JS210
Category	Excavators
Language	English