BT OE35, Service Manual

Page: 275 / 332

Mast, 3 Stage
PS S7.1 7110
F-code Section C-code
Version no T-code
001 OE35
273
Service Manual 1996-10-15 © BT Products
14. Remove cap screws which secure lift staging
cylinders at the top of the intermediate column.
Once columns are lifted with hoist, the lift cylinders
is free to move or fall. Secure lift cylinders in place.
15. Determine the number of shims required by prying
intermediate column to one side and slipping shims
between bearing and web on column. Add shims
by hand until no more may be added.
16. Divide shims as equally as possible between the
two bearings on both top and bottom of column
and install under bearings.
17. Lower intermediate column down and out the outer
column to expose the two bottom bearings and
install shims under bearings.
18. Raise intermediate column up outer column as far
as it will go under normal operation. Check bearing
shimming as intermediate column is raised.
Remove shims as required if tight spots are
encountered where assembler cannot move mast
smoothly. Check for excessive bearing clearance
with columns in the fully lowered position by prying
column to one side and check with a 0.030 in.
shim. Maximum clearance must not exceed 0.030
in.
Check for excessive bearing clearance with inner
column in fully raised position by prying column to
one side and checking with a 0.030 in. shim.
Maximum clearance must not exceed 0.030 in.
19. Push intermediate and outer columns together and
install cap screw in intermediate column to secure
lift staging cylinder and attach a hoist to top of lift
platform frame into place in inner column.
20. Hoist platform up inner column to attach lift chain
anchor pins. When installing lift chains, chains are
to be free of twists and adjusted for equal tension
with adjusting nuts (wheel nut) and locknuts (jam
nuts) torqued to 200 ft-lb. (271 N •m). Chains are to
be centered on sheaves within 1/32 in.
21. Connect electrical cable and attachment hydraulic
hoses.
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