DISASSEMBLY AND ASSEMBLY
HYDRAULIC TANK
3
4
HYDRAULIC TANK 4H0AX00
Inspecting and refilling the oil in the hydraulic tank
Inspection
The oil level changes with the oil temperature. Inspect
the oil while maintaining the machine at the attitude for in-
specting the oil level.
Machine attitude for inspecting the hydraulic oil level
1. Start the engine, and run it at low speed.
2. Fully retract the arm cylinder and the bucket cylinder,
and then lower the bucket to the ground.
3. Stop the engine.
4. Inspect the oil level using the sight gauge (12).
When the oil temperature is about 20°C (68°F): The
level should be halfway between the upper limit (H)
and the lower limit (L). If it is below the lower limit (L),
replenish.
When the oil temperature is about 50 to 80°C (122 to
176°F): The level should be near the upper limit (H).
Refilling the oil
Important: Do not refill to above the (H) mark. Doing so
may cause damage to the hydraulic circuit or cause oil to
spurt out. If the oil level is accidentally filled to above the
(H) mark, stop the engine and allow the hydraulic oil to
cool down before draining off the excess oil from the drain
plug (13).
Important: Failure to pressurize the hydraulic tank may
cause the pump to suck in air, which will adversely affect
the hydraulic units.
1. Slowly loosen the oil plug (6) to release the internal
pressure in the hydraulic tank.
2. Add the specified volume of hydraulic oil through the
oil filler port.
Tank pressure
Fully extend each cylinder as far as it will go, and insert
the oil plug with the cylinders extended to close off the
port. (The dozer blade should be lowered down to the
ground.)
• After finishing adding oil, make sure to increase the
pressure in the tank.
WARNING
• Oil may spurt out if caps or filters are removed or pipes
are disconnected before the pressure in the hydraulic
system is released.
• Slowly loosen the oil plug (6) to release the internal
pressure in the hydraulic tank.
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