Replace High-Pressure Strainer - Hitachi EX 3600-6 Operator's Manual

Replace High-Pressure Strainer

--- every 12000 hours
1. Park the machine on a level surface.
2. Lower the bucket to the ground.
3. Turn the auto-idle switch off.
IMPORTANT: The turbocharger may be damaged if the
engine is not properly shut down.
4. Run the engine at slow idle speed without load for
five minutes.
5. Stop the engine. Remove the key from the key
switch.
6. Pull the pilot control shut-off lever to the LOCK posi-
tion.
WARNING: Hydraulic oil and components may be
hot just after operation. Be sure to allow oil and
components to cool before starting work.
WARNING: Keep body and face away from cap
(1). Turn cap (1) slowly and remove the cap (1)
only after releasing the internal pressure com-
pletely.
7. Insert the wrench as shown and turn the wrench
clockwise and hold the wrench.
8. Turn cap (1) counter-clockwise about 30°, at which
point stop cap to release the air.
9. Turn cap (1) further and remove cap (1).
10. Align the projected part of cap with the projected part
of the case and install cap (1).
11. Remove bolts (2), cover (3) and strainer assembly
(6) from housing (7).
12. Discard O-rings ((4) and (5)) and strainer assembly
(6).
13. Install new strainer assembly (6) into housing (7) with
the rubber seal down and the welding bead line on
strainer assembly (6) away from the housing inlet.
14. Install cover (3) with new O-rings ((4) and (5)).
15. Install and tighten bolts (2) to 265 N m (27 kgf m, 195
lbf ft).
16. Repeat steps 11 to 15 for the other strainer.
MAINTENANCE
Rubber Seal
7-67
Wrench 4 mm
2
3
4
5
6
7
Inlet
1
M146-07-031
1
Arrow (b)
Projection
Case Assembly
Projection
Side Hole
M110-07-022
M146-07-036
Welding Bead
Line Side
M114-07-062