PS
S7.1
7110
001
OE35
Version no
T-code
F-code
Section
C-code
Mast, 3 Stage
272
Service Manual
1996-10-15
5. Attach hoist to top of inner column and hoist to
loosen lift chain. This will allow removal of lift chain
anchor pins.
6. Before disconnecting hoses and fittings from inner
column, thoroughly clean off all outside dirt around
fittings. After disconnecting hoses, immediately
cap ports on tubes
and hoses to
prevent
contaminants from entering the hydraulic system.
7. Raise inner column.
8. Determine the number of shims required by prying
inner column to one side and slipping shims
between bearings and web on column. Add shims
by hand until no more may be added.
9. Divide shims as equally as possible between the
two bearings on both top and bottom of column
and install under bearings.
10. Lower inner column down and out the intermediate
column to expose two bottom bearings and install
shims under bearings.
11. Divide shims as equally as possible between the
two bearings on top of intermediate column and
install under bearings.
12. Raise inner column up intermediate column as far
as it will go under normal operation. Check bearing
shimming as inner 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 lowered position by prying column to
one side and check with 0.030 in. shim. Maximum
clearance must not exceed 0.030 in.
13. Attach a hoist to top of both inner and intermediate
column.
NOTE! Make note of which port the hoses are from
for easier installation.
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