Relief Valve; Relief Valve - Pressure Test (H.40.B.16 - F.40.A.30); 435, 445, 445Ct - Case 445CT Repair Manual

Relief valve - Pressure test (H.40.B.16 - F.40.A.30)

435, 445, 445CT

PRIMARY HYDRAULIC POWER SYSTEM - Special tools (A.10.A - D.20.A.40)
1. Park the machine on a level surface.
2. Lower all attachments to the floor.
3. Stop the engine.
4. Move the control levers in all directions to release
any circuit pressure.
5. The best way to connect the hand pump is directly
to the control valve. Disconnect the tube from the
port of the control valve and connect the hand pump
to the port. By connecting directly to the control
valve, you avoid the possibility of a bad reading
because of cylinder movement.
6. Remove all dirt and grease from the connecting
point.
7. Connect the hose of the hand pump to the
connecting point, but do not tighten the connection.
8. Make sure that the hand pump is filled with oil. The
temperature of the oil must be at least 21°C (70°F).
9. Operate the hand pump to fill the hose of the hand
pump with oil. Then tighten the connections.
10. Operate the hand pump and read the pressure
gauge. Record the highest indication. Check
the pressure several times to make sure that the
indications are correct.
11. Compare the indication with the specification
Relief valve - General specification (H.20.B.16 -
D.40.A.10). If the indication is not correct, replace
the circuit relief valve.
NOTE: The circuit relief valves for the loader circuit are
not adjustable and must be replaced if they do not meet
the specification.
12. Repeat this test after installing a new circuit relief
valve.
WORKING ARM - SINGLE ARM Lift
1 04/05/2005
H.40.B / 35