Komatsu 830E-AC Shop Manual page 499

PIVOT PIN
Removal
1. Park truck on firm, level surface and block front
and rear side of all tires.
Truck body must be empty and down against
frame before attempting this procedure.
2. Release all brakes.
3. Charge rear suspensions with nitrogen until pis-
tons are fully extended.
4. Place blocks or stands under each frame mem-
ber beneath the hoist cylinders.
Blocks must be securely in place before lowering
the frame. Check blocks on wheels to make sure
they are in place.
5. Release nitrogen out of front suspensions.
6. Release nitrogen out of rear suspensions.
7. Place a jack below the pivot pin to control any
downward movement when the pin is removed.
8. Disconnect pin lube line. Remove ground wire
between pivot structure and frame.
9. Remove cap screw and lockwasher (3, Figure
4-1). Remove cap screws (4). Remove retainer
plate (2).
10. Install puller using tapped holes in head of pin.
Remove pin (6).
NOTE 1: Placement of a jack between mounting
structure and pivot eye may be necessary to push
the pivot eye down away from frame structure. Pivot
eye may also need to be moved to one side to clear
welded spacer.
NOTE 2: If the bore for the Pivot Pin (6, Figure 4-1) in
the Mounting Structure (1, Retainer Plate side) has
been damaged, a rework procedure to install a
sleeve is available. The rework drawing, EG4670, is
available in AK4952 Nose Cone Repair Kit.
G04022
REAR AXLE HOUSING ATTACHMENT
Rear Axle Housing Attachment
Installation
1. Raise pivot eye into position.
2. Be certain spherical bearing inner race (7) is
aligned. Install spacers (5, Figure 4-1) and pin
(6).
3. Line up cap screw holes in pin with cap screw
holes in retainer plate (2). Install cap screws (4).
4. Rotate pin and retainer plate to align cap screw
holes in frame mounting structure.
a. Install cap screws and lockwashers (3).
b. Tighten cap screws (3) to 170 N-m (125 ft
lbs) torque.
c. Tighten cap screws (4) to 2325 N-m (1715 ft
lbs) torque.
FIGURE 4-1. PIVOT PIN INSTALLATION
1. Mounting Structure
2. Retainer Plate
3. Retainer Cap Screw &
Lockwasher
4. Cap Screw (12pt. - G9)
& Hardened Flat-
washer
5. Bearing Spacer
6. Pivot Pin
7. Bearing
8. Bearing Retainer
9. Pivot Eye Structure
10. Bearing Carrier
11. Cap Screw (12pt. - G9
12. Locknut
G4-3