Daewoo B20S-2 Disassembly/Assembly page 21

IDCD039P
8. In case of standard and full free mast, inner lower
bearings can be easily extruded by pulling down
the inner mast from the bottom of staionary mast.
If intermediate mast is stuck and do not move
rolling up and down, there might be excessive
shim. Pull out the intermediate mast from the
stationary mast and remove shim 0.5 mm to both
intermediate lower bearings. Repeat same
procedure of aboves until properly shimmed.
There is to be contact zero clearance (C) between
intermediate lower bearings and stationary
channel at approximately 475 mm (18.7 in)
channel lap.
B. Upper Bearing Adjustment of Stationary
Mast
IDCD033P
9. Lifting by crane, and pull out intermediate mast
from stationary mast. Install 1 mm shim to each
bearing of stationary mast upper basically. Bearing
should be selected D581814 under size bearing.
Vehicle Systems
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IDCS124S
Mast Adjustment Upper Bearings
(D) Zero clearance. (E) 0.80 mm (.031 in) Clearance maximum.
(F) Zero clearance. (7) Pads. (8) Shims. (9) Shims. (10) Shims.
IDCD038P
10. Make sure whether stationary mast upper
bearings are properly shimmed by rolling up and
down and moving intermediate mast to right and
left. If clearance between both masts can be
detected, pull out the intermediate mast from the
stationary mast with crane and add shim 0.5 mm
or 1 mm to both stationary upper bearings.
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Disassembly & Assembly
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