Specifications

Vehicle System Testing & Adjusting 59

Mast and Carriage

Mast Adjustment - STD, FFL & FFT

NOTE: The Standard, Full Free Lift and Full Free

Triple Lift mast load bearings are all adjusted the

same way. The mast shown in the following

illustrations is the Full Free Triple Lift mast.

To make the mast clearance adjustments, mast

must be removed from the lift truck.

Carriage, chain and lift cylinder must be removed

from the mast for easy adjustments.

Use the procedure that follows to adjust the load

bearings.

A. Lower Bearing Adjustment of Intermediate Mast

Mast Adjustment Lower Bearings

(A) Zero clearance. (B) Minimum clearance. (C) Zero clearance.

(3) Bearing. (4) Bearing. (5) Shims. (6) Shims.

1. Select lower bearings (3) and (4) from the chart to

obtain minimum clearance (B) between bearing and

channel leg for full channel length. 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(4.135 in)

D581816 Over Size 110.7 mm(4.358 in)

* Permissible tolerance ±0.08mm (.003in)

2. Find narrowest point by ruler on the stationary

mast in the area where the bearings make

contact at 475 mm (18.7 in) channel lap.

IDCS123S