Specifications

Vehicle System Testing & Adjusting 71
Quad Mast
To make the carriage clearance adjustments, carriage
must be removed from the mast.
Use the procedure that follows to adjust carriage load
bearings.
Carriage Adjustment
(3) Upper Bearings. (4) Shims. (5) Bolt. (6) Screw.
(7) Middle Bearings. (8) Lower Bearings. (A) Zero Clearance.
(B) 6.0 to 9.0 mm. (.236 to .354 in) Clearance.
(C) Minimum Clearance.
1. Select lower bearings from the chart to obtain
minimum clearance (B) between bearings and
channel leg for full channel length. Use same
bearing in all six locations.
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 inner mast in
the area where the bearings make contact.
3. Install enough shims (4) that have been divided
into two equal groups behind bearings (3). At
installation, there is to be contact [zero clearance
(A)] between the bearings and the narrowest
point of inner mast.
4. Do step 2 through 3 for other sets of bearings.
IDCS125S
A
5
3
C
6
4
B
A
B B
C C
C
A
8 A
7
A
C
VIEW C-C
VIEW B-B
VIEW A-A
IDCD015P