4-6.3 Frame Assembly: Fork Section And Lift Linkage Repair And Replacement - Big Joe PPT 45 Series Operation, Maintenance, Repair Parts

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Figure 4-21. Load Wheel Assembly
4-6.3 Frame Assembly: Fork Section and Lift
Linkage Repair and Replacement.
1. Lift Linkage repair and replacement:
a. Lift complete truck to height sufficient to permit
access to lift linkage under forks. Provide
blocking under power section frame and at
tips of forks.
b. Remove screws (11, Figure 4-22) that secure
the lower support pins (9) to the pivot
weldment (8). Remove both support pins from
the pivot weldment.
c. Drive roll pin (2) from pivot weldment (8).
d. Remove lift link support pin (5) from pivot
weldment.
NOTE: Using a fine tip marker, draw a match
mark line across the end of the lift link
support pin and onto the pivot
weldment. This line will assist in
realigning the pin hole in the shaft with
the pin hole in the link lift shaft.
e. Remove the roll pin (2) and remove the pivot
shaft (7) from power section. Remove pivot
weldment (8) and lower the pull rod assembly
(6) and link shaft to the floor.
f. Replace worn or damaged lift link components
g. Reassemble lift linkage by reversing steps "a"
through "e" above.
2. Pull Rod Removal and Installation (Figure 4-22)
a. Remove roll pin (2) from the fork section and
remove shaft (1).
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b. Pull wheel housing out of fork section to gain
access to the keeper pin (5). Remove lock
screw and keeper pin (5).
c. Drive out roll pin (2) from shaft (7). Remove
shaft from the power section end of the pull
rod.
NOTE: It may be necessary to either extend
or retract the hydraulic cylinder to gain
access to the roll pin.
Using a fine tip marker, draw a match
mark line across the end of the lift link
support pin and onto the link lift shaft.
This line will assist in realigning the
pin hole in the shaft with the pin hole
in the link lift shaft.
d. If replacing one pull rod assembly (6), take the
initial measurement from the remaining good
rod. Adjust the new rod assembly to match the
measurement. If replacing both pull rods,
rotate the turnbuckles to set a 37 ¾"
measurement on the 48" fork.
e. Install wheel housing end of replacement rod
first. Secure pull rod to wheel HSG assembly
using keeper pin (5). Secure keeper pin with
lock screw . Shim as needed (3).
f. Install the other end of the pull rod into the
pivot weldment and secure with shaft (7).
Secure shaft (7) with roll pin (2). Shim as
needed (3).
NOTE: If the holes do not line up, rotate the
turnbuckle
properly.
g. Rinstall shaft (1) and roll pin (2) to reconnect
pull rod to wheel HSG assembly.
h. Insert pivot shaft (9) to secure the pull rod
assembly to the pivot tube. Secure pivot shaft
with screw (11) and washer (10). Shim as
needed (3).
i. Visually compare the position of the load
wheels (4). If necessary, adjust turnbuckle on
new pull rod to match position of the other load
wheel.
j. Remove supports from truck and lower the unit
to the ground. Check to make sure that both
wheel housings retract at the same time and
that the forks are level when the lift truck is fully
raised.
k. After confirming adjustment, tighten jamb nut
against the turnbuckle on the new pull rod.
until the holes align
PPT0104-901336