JLG X20JP - X600AJ Service Manual - Manual (Page 47)

SECTION 3 - CHASSIS & TURNTABLE
3121623 – JLG Lift – 3-23
TROUBLESHOOTING
The following table is a guideline to identify the troubles in
the track drive.
Table 3-5.
Anomalies Causes Remedies
External oil leakage:
From the lifetime seal a) Lifetime damaged a) Replace lifetime seal
From the end cover a) O-ring seal damaged a) Replace O-ring seals
From the plugs of the cover a) Plug seal damaged
b) Plugs or screws loose
a) Replace plug seal
b) Tighten the plugs/screws
From hydraulic motor a) O-ring seals damaged
b) Plugs or screws loose
c) Internal motor parts damaged
a) Replace O-ring seals
b) Tighten the plugs/screws
c) Check the hydraulic motor
Too much noise:
Inside the hydraulic motor (mechani-
cal noise) a) Internal motor parts damaged a) Check the hydraulic motor
Hydraulic noise (during the slowing
down of the motor speed) a) Internal motor parts damaged
b) Hydraulic circuit malfunctioning
a) Check the hydraulic motor
b) Check the pressure to the motor
ports is ≥ 3 bar Verify hydraulic circuit
Inside the gearmotor (reductions) a) Internal damage a) Check the gearbox
Other:
Overheating a) Insufficient oil level
b) Hydraulic oil too warm
c) Brake not fully released
a) Check the oil level and refill if nec-
essary
b) Check the hydraulic circuit
Insufficient power a) Internal motor parts damaged
b) Malfunctioning valves
a) Check the hydraulic motor
b) Check valves
Insufficient braking torque Parking brake malfunctioning
a) Motor feed not correct
b)Low volumetric efficiency
a) Check the hydraulic circuit
b) Check the hydraulic motor
Sprocket locked a) Hydraulic motor locked
b) Parking brake locked
c) Mechanical components damaged
a) Check hydraulic motor
b) Check the complete brake release
c) Replace damaged parts