BT OE35, Service Manual

Page: 281 / 332

Mast, 3 Stage
PS S7.1 7110
F-code Section C-code
Version no T-code
001 OE35
279
Service Manual 1996-10-15 © BT Products
8. Determine the number of shims required by prying
the inner column to one side and slipping shims
between bearing and web on the mast. Add shims
by hand until no more can be added.
9. Divide shims as equally as possible between the
two bearings and install under bearings.
10. Extend inner column through intermediate column
as far as it will go under normal operation. Check
bearing shimming as column is extended. Remove
shims as required, if tight spots are encountered
where assembler cannot roll mast by hand.
Check for excessive clearance with columns in the
fully closed position by prying column to one side
and checking with a 0.060 in. shim. Maximum
clearance must not exceed 0.060 in.
Check for excessive bearing clearance with
columns in the fully extended position by prying
column to one side and checking with a 0.030 in
shim. Maximum clearance must not exceed 0.030
in.
11. Install column stops in outer column and torque to
260 ft-lb. (350 N•m).
12. Install staging lift cylinder assembly in intermediate
column lower end.
13. Press roller bearings in lift chain sheaves, grease
roller bearings, and slide inner races in roller
bearings.
14. Install shim washers on either side of lift chain
sheaves and install in intermediate column. Slide
pins through sheaves and secure pins with two cap
screws and lockwashers. Do this to both chain
sheave pins.
15. Install bearing in electrical sheave, grease bearing
and install spacers on either side of bearing.
16. Install electrical sheave on intermediate column
and secure with a cap screw and lockwasher.
17. Push intermediate and outer columns together and
install cap screw in intermediate column to secure
staging lift cylinder.
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