Service Repair Manual
330, 330L EXCAVATOR
Model: 330 L EXCAVATOR 6WJ
Configuration: 330, 330L TRACK-TYPE EXCAVATORS 6WJ00001-UP (MACHINE) POWERED BY 3306 ENGINE
Disassembly and Assembly
330,330 L & 330 LN EXCAVATORS MACHINE SYSTEMS
Media Number -SENR5498-01
Publication Date -01/10/2004
Date Updated -19/01/2005
SMCS - 4351-017; 4351-010
Remove & Install Travel Motors
NOTE: Prior to removing the travel motor, drain the oil from the final drive into a suitable
container. To drain the oil, put the drain plug in the final drive at the bottom position by moving
the machine. Remove the drain plug to drain the oil. The capacity of the final drive is 13 liters
(3.4 U.S. gal).
At operating temperature, the hydraulic oil tank is hot and under
pressure. Hot oil can cause burns. To prevent possible personal injury,
release the pressure in the implement hydraulic circuits (boom, stick
and bucket) before any hydraulic lines or components are disconnected
1. Release the pressure in the hydraulic system as follows:
a. Fully retract the rod in the stick cylinder.
b. Adjust the position of the bucket so it will be flat on the ground when the boom is
d. Lower the boom until the bucket is flat on the ground.
d. Shut off the engine, and put the hydraulic activation control lever in the "Lock" position.
e. Move the control levers for the boom, bucket, stick and swing through their full travel
strokes. This will relieve any pressure that may be present in the pilot system.
f. Slowly loosen the air breather cap on the hydraulic oil tank to release the pressure.
g. Tighten the air breather cap on the hydraulic oil tank.
h. The pressure in the hydraulic system has now been released. Lines and components can
now be removed.
2. Remove two covers (1) from the rear of the undercarriage frame assembly.