Removal And Installation Of Work Equipment Assembly - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02640-00
Removal and installation of work
equipment assembly
Special tools
Part number
796-670-1100 Remover
796-670-1110 • Sleeve
796-670-1120 • Plate
796-670-1130 • Screw
791-775-1150 • Adapter
P
01643-33080 • Washer
01803-13034 • Nut
Puller
790-101-4000
(490 kN {50 t} long)
Pump
790-101-1102
(294 kN {30 t})
Removal
k
Extend the arm and bucket fully. Lower the
work equipment to the ground and set the work
equipment lock lever to the lock position.
k
Release the residual pressure. For details,
see Testing and adjusting, "Releasing
residual pressure from hydraulic circuit".
1. Disconnect grease hose (1).
2. Sling boom cylinder assembly (2), and remove
lock bolt and nut (3).
3. Remove plate (4), then remove head pin (5).[*2]
a Check the number as well as locations of
the shims used.
2
Part name
t 1
1
1
1
1
1
1
t 1
t 1
[*1]
4. Start the engine and then retract the piston rod.
a Fasten the piston rod with wire and place
1
it on the stand so that it may not slip out,
or place a support to prevent the cylinder
from hanging toward the bottom.
a In the latter case, remove the bottom side
grease nipple.
a Remove the boom cylinder on the other
side in the same manner.
a When the work equipment assembly is
lifted up, if the sling touches the working
lamp, remove the working lamp.
5. Disconnect intermediate connector A42 (6) for
the working lamp.
6. Disconnect 3 arm cylinder hoses (7) and 2
bucket cylinder hoses (8).
a Apply the oil restraining plug and then fix
the hoses to the valve side by use of ropes.
7. Lift the work equipment, and then remove plate
(9).
8. Using tool P, remove foot pin (10)
a Check the number as well as locations of
the shims used.
50 Disassembly and assembly
PC300, 350-8
[*3]