4000 SRM 764
Forks
General
This manual has the repair procedures for the
two-stage and three-stage masts. A section for trou-
bleshooting and a section for checks and adjustments
is given at the end of the section. The description
and operation of the masts are given in the section
MAST, Description 4000 SRM 763. Repair pro-
cedures for the operator platform are also in this
section.
Forks
REPLACE
WARNING
Lower the lift mechanism completely. Never al-
low anyone under a raised operator platform
or forks. Do not put any part of your body in
or through the mechanism unless all parts of
the mast are completely lowered and the key
switch is OFF.
Before making any repairs, use blocks and
chains on the mast weldments and operator
platform so they cannot move. Make sure the
moving parts are attached to a nonmoving
part.
WARNING
Forks are heavy and can cause an injury. Do
not try to remove forks without using a lifting
device.
Each of these forks is connected to the operator plat-
form by a pin near the edge of the platform. See
Figure 1 and Figure 2. The pin fits through a tube
welded to the top of the fork. The forks can be re-
moved by raising the operator platform for access.
WARNING
Before replacing forks, use blocks and chains
on the mast weldments and operator platform
so they cannot move. Make sure the moving
parts are attached to a nonmoving part.
Use blocks and chains to prevent movement of the
mast or operator platform. Support the fork, remove
the snap ring on the end of the pin, and remove the
pin. Install the forks using the reverse procedure.
Make sure the hook at the end of the fork engages
the plate of the platform. Do not install any shims at
this time. Make sure the operator platform is fully
lowered. Adjust the lift chains of the operator plat-
form so the tip of the highest fork is within the speci-
fication. See Lift Chain Adjustment at the end of this
section. After the chains are adjusted, use shims on
the top of the fork (lowest fork tip) at the hook so the
fork tips are aligned within 3.2 mm (1/8 in.).
1.
FORK
2.
PIN
3.
SNAP RING
4.
SHIM
5.
SPACER
6.
WASHER
7.
WASHER
Figure 1. Fork Assembly
1