Gehl 503Z, Руководство оператора

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Printed in U.S.A. 4-20 918070/FP0811
Hydraulic Cooling System
The hydraulic system uses a hydraulic cooler to keep
the hydraulic fluid at the proper temperature. The
cooler is located inside the engine compartment near
the engine radiator. Inspect the cooler for leaks or
damage.
Pilot Valve
Checking Pilot Control Valve Filter:
1. Position the machine on a level surface.
2. Fully extend the bucket and boom, retract the arm
and position as shown in Figure 4-13.
3. Lower the bucket and dozer blade to the ground.
Move the joysticks in all directions to verify the
hydraulic system is de-pressurized.
4. Shut off the engine. Remove the ignition key and
take it with you. Lock-out the controls by raising
left control console.
5. To relieve pressure, slowly open the hydraulic oil
filler cap (4). Re-tighten the filler cap after reliev-
ing pressure.
6. Tilt the cab/canopy according to “Tilting the Cab
or Canopy” on page 3-15.
7. Disconnect hose (A, Figure 4-17) connected to the
pilot control filter/restrictor fitting (B) on the side
of a joystick control valve.
8. Disconnect the pilot control filter/restrictor fitting
(B) from the valve.
Figure 4-17 Pilot Control Filter/Restrictor
9. Check the filter/restrictor fitting filter screen (C)
for contamination/dirt and clean if necessary.
Replace the filter/restrictor if it is damaged.
10. Replace filter/restrictor fitting (B) back into the
valve, and reconnect hose to the filter/restrictor
(C). Tighten securely.
11. Repeat steps 7-10 for the other joystick control
valve.
12. Tilt the cab/canopy down according to “Tilting the
Cab or Canopy” on page 3-15.
IMPORTANT
Hydraulic oil contamination can damage
pilot valve control spools. Check the pilot
control valve filter/restrictor every 1000
hours and clean if necessary. Replace the
filter/restrictor if it is damaged in any way.
IMPORTANT
Hydraulic oil will leak during this proce-
dure. Place absorbent material under valve
to catch leaking oil. Always dispose of
hydraulic fluids according to environmental
laws or take to a recycling center for proper
disposal.
B
B
C
A