Removal And Installation Of Revolving Frame Assembly - Komatsu PC88MR-10 Shop Manual

50 Disassembly and assembly
Undercarriage and frame

Removal and installation of revolving frame assembly

Loosen the cap of the hydraulic tank to
release the pressure inside the hydraulic
tank.
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".)
Release the remaining pressure in the
hydraulic circuit referring to "Testing and
adjusting", "Releasing remaining pressure in
hydraulic cylinder circuit".
Removal
(PC88MR-H110-520-K-00-A)
1. Remove the work equipment assembly. For
details, see "Removal and installation of work
equipment assembly".
2. Disconnect hoses (2 pieces) from the boom
cylinder.
(1): Boom cylinder head hose (band color: red)
(2): Boom cylinder bottom hose (band color:
yellow)
3. Remove the lock plate, pull out pin (3), and
remove boom cylinder assembly (4).
a Check the quantity and installing positions of
installed shims in advance.
4. Remove engine hood (7).
50-134
Engine hood assembly:
25 kg
5. Remove the operator's cab assembly. For
details, see "Removal and installation of
operator's cab assembly."
6. Disconnect the hose from the center swivel joint.
a Check the connection positions with the band
colors.
(8): Drain hose (band color: white/blue)
(9): Right reverse travel hose (band color: green/
yellow)
(10): Left reverse travel hose (band color:
orange/yellow)
(11): Right forward travel hose (band color:
black/yellow)
(12): Left forward travel hose (band color: brown/
yellow)
(13): Blade LOWER hose (band color: red/black)
(14): Blade RAISE hose (band color: yellow/
blue)
(15): 2nd travel speed selector hose (band color:
yellow/yellow)
7. Remove pin (16) from the center swivel joint.
(PC88MR-H110-924-K-00-A)
PC88MR-10