5-4 4262930-Rev A
POWER TRAIN
5
Troubleshooting
Condition Probable Cause Remedy
Traction drive does not engage when OPC
bail is engaged.
System voltage too low. Check battery pack voltage.
Park brake engaged. Release park brake. (Refer to Operator’s
Manual.)
Speed paddle setting is too low. Increase machine speed. (Refer to
Operator’s Manual)
OPC cable damaged. Replace OPC cable. (See “OPC Cable” on
page 6-10.)
OPC rotary switch malfunction. Check OPC rotary switch. (See “Bail
Potentiometer Test” on page 4-55.)
Traction drive belts not tensioned properly. Adjust traction drive belt tension. (See
“Traction Drive Belt Tension Check and
Adjustment” on page 5-5.)
Traction drive belts worn, stretched, or
damaged.
Replace drive belt(s). (See “Traction Drive
Belts” on page 5-7.)
Key damaged or missing on traction motor
shaft.
Repair or replace key as needed. (See
“Traction Motor” on page 4-63.)
Key damaged or missing on traction drum
shaft pulley.
Repair or replace key as needed. (See
“Traction Drive Drum and Bearing
Housing Assembly” on page 5-10.)
Traction drum differential damaged. Repair or replace differential assembly.
Traction drive does not reach full speed. Traction drive belts not tensioned properly. Check traction drive belt tension. (See
“Traction Drive Belts” on page 5-7.)
Traction drive belts worn, stretched, or
damaged.
Replace drive belt(s). (See “Traction Drive
Belts” on page 5-7.)
Traction drive pulls to one side. Traction drum differential damaged. Repair or replace differential assembly.
(See “Differential Assembly” on
page 5-17.)
Park brake cable not adjusted properly or
not fully releasing.
Adjust park brake cable. (See “Park Brake
Check and Adjustment” on page 7-4.)
Traction drum bearing binding, worn, or
damaged.
Replace traction drum bearing.
(See “Traction Drive Drum and Bearing
Housing Assembly” on page 5-10 and
“Traction Drum Left Bearing Housing”
on page 5-11 or “Traction Drum Right
Bearing Housing” on page 5-13.)
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