MACHINE CONFIGURATION
HYDRAULIC SYSTEM
III-38TB53FR
Filling with Hydraulic Oil
1. Fill the tank with the specified amount of hydrau-
lic oil through the filler inlet.
2. Bleed the air from the hydraulic pump.
“Bleeding the air”
3. Run the engine for 2~3minutes at low speed.
4. Retract the arm and bucket cylinders fully, lower
the boom and lower the bucket to the ground.
5. Lower the dozer blade to the ground.
6. Check if the oil level is proper using a level gauge.
Bleeding the Air
Bleed the air after replacing the hydraulic oil or
reassembling hydraulic devices or hoses.
1. Remove the vent plug (7), on the hydraulic pump,
bleed the air from the housing, and tighten plug
(7) once hydraulic oil begins to come out.
• Be sure to stop the engine.
2. Start the engine and run the engine at low idle.
3. Slowly operate the cylinders until the air is bled.
4. Bleed the air from the cylinders.
a. With the engine running at slow, extend and
retract the cylinders 4 or 5 times.
• Move the piston rods to 100 mm before the
stroke end. DO NOT extend them com-
pletely.
b. Repeat step “a” above with the engine running
at full, then run it at slow and extend the piston
rods completely to the stroke end.
J1C108
7
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