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50 Disassembly and assembly
Hydraulic system
Hydraulic system
Removal and installation of center swivel joint assembly
Stop the engine, turn the battery disconnect
switch to OFF position, and remove the key.
(For details, see "Testing and adjusting",
"Handling battery disconnect switch".)
Place the machine on a level ground, lower
the work equipment to the ground, stop the
engine, and set the lock lever in LOCK
position.
Loosen the cap of the hydraulic tank to
release the pressure inside the hydraulic
tank.
Removal
(PC88MR-J8E0-520-K-00-A)
1. Disconnect the hose from the center swivel joint.
(1): Drain hose (band color: white/blue)
(2): Right reverse travel hose (band color: green/
yellow)
(3): Left reverse travel hose (band color: orange/
yellow)
(4): Blade RAISE hose (band color: yellow/blue)
(5): 2nd travel speed selector hose (band color:
yellow/yellow)
(6): Right forward travel hose (band color: black/
yellow)
(7): Left forward travel hose (band color: brown/
yellow)
(8): Blade LOWER hose (band color: red/black)
2. Remove pin (9) from the center swivel joint.
50-138
(ALL-C000-001-K-50-A)
3. Disconnect hoses (10) to (19) between the
bottom of the center swivel joint and travel
motor.
4. Remove elbow (20).
5. Sling the swivel joint , and remove mounting
bolts (21) (4 pieces). [*1]
6. Sling center swivel joint assembly (22) and
remove it.
Center swivel joint assembly:
17 kg
Installation
(PC88MR-J8E0-720-K-00-A)
Perform installation in the reverse order to
removal.
[*1]
Center swivel joint mounting bolt:
98 to 123 Nm {10.0 to 12.5 kgm}
Refill with oil (Hydraulic tank)
Refill it with oil to the specified level through the
oil filler port. Run the engine to circulate the oil
through the piping. Then check the oil level
again.
Hydraulic oil:
56 l (Specified capacity: 102 l)
Bleed air
(PC88MR-J8E0-924-K-00-A)
PC88MR-10
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