Specifications

Vehicle System Disassembly & Assembly 34
Assemble Quad Mast
1. Make sure all parts are clean and free of dirt and
foreign material.
2. Check all parts for damage, use new parts for
replacement.
A. Lower Bearing Adjustment of Outer
Intermediate Mast
Mast Adjustment Lower Bearings
(A, B, C) Zero clearance. (D) Minimum clearance.
(3, 4, 5) Bearing (6, 7, 8) Shims.
3. Select lower bearings (3), (4) and (5) from the chart
to obtain minimum clearance (D) between bearing
and channel leg for full channel length. Must use
same bearing on left and right side.
Mast And Carriage Bearings
Part No. Bearing Size Bearing O.D. *
D581814 Under Size 108.6 mm (4.276 in)
D581815 Standard 109.6 mm (4.276 in)
D581816 Over Size 110.7 mm (4.358 in)
* Permissible tolerance ± 0.08 mm (.003 in)
4. Find narrowest point by ruler on the staionary mast
in the area where the bearings make contact at 475
mm (18.7 in) channel lap.
NOTE: When installing shims (2) behind bearings (1),
make sure the amount of shim is divided equally when
positioned behind each bearing (1).
5. Install the correct amount of shim (2) behind rollers
until contact (zero clearance) is made between the
rollers.
IDCD036P