Removal And Installation Of Control Valve Assembly - Komatsu PC88MR-10 Shop Manual

50 Disassembly and assembly
Hydraulic system

Removal and installation of control valve assembly

a Special tools
S-
y-
Part No.
mbol
2796-460-1210 Oil stopper
D
796T-460-1240 Lot
Place the machine on a level ground and
lower the work equipment to the ground in a
stable posture.
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".)
Set the lock lever in LOCK position.
Loosen the cap of the hydraulic tank to
release the pressure inside the hydraulic
tank.
Release the remaining pressure in the
hydraulic circuit referring to "Testing and
adjusting", "Releasing remaining pressure
from hydraulic system".
Disconnect the cable from the negative (-)
terminal of the battery.
a Note the position where the hose and wiring
connector were disconnected so that they can
be installed correctly.
Removal
(PC88MR-C030-520-K-00-A)
1. Loosen mounting bolt (1), and remove cover
(1a).
2. Loosen drain plug (1b) of the hydraulic tank, and
drain the oil. [*2]
50-148
Part name
t 1
1
(PC88MR-C030-924-K-00-A)
Hydraulic oil:
56 l l (specified capacity: 100 l l )
a When using tool D, remove the hydraulic
tank strainer, install tool D and stop draining
the oil.
3. Disconnect hoses (2) and (3).
4. Disconnect tube (4).
5. Disconnect connector M06 (4a).
6. Remove clamp (5).
7. Remove mounting bolts (6), and remove the
tank together with bracket (7).
a Keep bracket (7) out of the way of the work.
PC88MR-10