OPERATOR'S MANUAL MAINTENANCE

Section 3 - Maintenance
Routine Maintenance
Hydraulic System
3-89 3-89
9803/JSM-0412
Draining Water and Sediment from the
Hydraulic Tank
1 Prepare the machine.
K Prepare the Machine for
Maintenance ( T 3-29).
2 Release tank pressure,
K Releasing Tank
Pressure ( T 3-81).
3 Draining the water and sediment. Carefully loosen the
drain plug C on the bottom of the tank and drain the
sediment and water accumulated at the bottom of the
tank.
Note: Have a drain pan ready. The task is complete when
clean hydraulic oil flows out.
4 Seal the system. Tighten the drain plug C.
Air Bleeding Procedures
After replacing the hydraulic oil or repairing or replacing
hydraulic components or removing hydraulic pipes, bleed
air from the hydraulic circuit
Bleeding Air from the Hydraulic Pump
1 Prepare the machine.
K Prepare the Machine for
Maintenance ( T 3-29).
2 Locate the hydraulic pump,
K Machine
Description ( T 1-5).
3 Temporarily loosen the hose connection at A to check
that oil does not come out of the pump.
4 If oil comes out re-tighten the connection, if it does not
come out remove the hose and pour hydraulic oil into
the pump case through the port. When oil comes out
of the port refit the hose connection.
5 Run the machine at idle for five minutes.
Fig 67. JS115-190
A