Hydraulic System; Check The Accumulator Function; Relieve Hydraulic System Pressure; Check Hydraulic Oil Level - SANY SY35U Operation And Maintenance Manual

Maintenance

Hydraulic System

Check the Accumulator Function

1. Lower the work equipment to 18 in.–24 in. (0.45 m–0.6 m) from the ground.
2. Shut down the engine.
3. Turn the key switch to the ON position.
4. Move the hydraulic lockout control lever to the unlocked (open) position.
5. Fully cycle each pedal, joystick, and travel control lever two or three times within 15 seconds in order to
release any pressure remaining in the hydraulic lines.
NOTE: If there is no movement, contact a SANY dealer.

Relieve Hydraulic System Pressure

NOTE: Hydraulic system pressure must be relieved before disconnecting or servicing hydraulic system
components.
1. Prepare the machine for service. See "Maintenance
Safety" on page 2-8.
2. Turn the key switch to the ON position. Do not start the
engine.
3. Set the hydraulic lockout control lever to the unlocked
(open) position.
4. Fully cycle each pedal, joystick, and travel control two
or three times to release pressure remaining in the
hydraulic lines.
5. Turn the key switch to the OFF position.
6. Move the hydraulic lockout control lever to the locked
(closed) position.
7. Open the right front access door.
8. Remove the wing nut cover (1) and press the relief valve button (2) to release pressure in the hydraulic tank.
9. Install the wing nut cover.

Check Hydraulic Oil Level

See "Check the Hydraulic Oil Level" on page 4-11.
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Operation and Maintenance Manual — 0120
SY35U Excavator OMM
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Fig. 5-56
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SANY