Disassemble
1.
Remove upper and lower bearings from inner
frame. See Clean and Inspect section for proce-
dures. See Figure 12.
2.
If damaged, remove lube fittings from outer
frame. See Figure 12.
3.
Dissemble the integral sideshift cylinder. See
the Cylinder Repair manual listed in the
General section of this manual for procedures.
NOTE: OUTER FRAME SHOWN MAY BE DIFFER-
ENT FROM WHAT IS ON YOUR LIFT TRUCK. HOW-
EVER, REMOVING THE OUTER FRAME FROM
THE INNER FRAME IS THE SAME.
1. OUTER FRAME
2. LIFTING HOOK (M12 X 1.75)
3. LIFTING DEVICE
Figure 13. Remove Outer Frame
Clean and Inspect
1.
Inspect lower mounting hooks for wear. Replace
hooks if they are worn beyond the wear limit.
The wear limit clearance range is
0.76 mm (0.03 in.) minimum and
1.52 mm (0.06 in.) maximum. See A in Fig-
ure 14.
CAUTION
Improper welding procedures can damage the
structure of the mast or cause incorrect function
of the mast. Consult your Hyster lift truck dealer
for more information before welding on the mast.
2.
Clean and inspect carriage bars for damage and
smoothness. Ensure carriage bars are parallel
and ends are flush. If carriage bars have any
protruding welds or damaged notches, repair by
grinding, filing, or welding.
3.
Clean bearing areas. Inspect sideshift bearings
for wear as follows:
a.
If either upper bearing is worn to less than
2.5 mm (0.1 in.) thickness, replace both up-
per bearings by driving the upper bearings
from the inner frame.
b.
If either lower bearing is worn to less than
2.5 mm (0.1 in.) thickness, replace lower
bearings by prying the lower bearings from
the inner frame.
4.
Inspect the sideshift cylinder. See Cylinder
Repair manual listed in the General section of
this manual for procedures.
5.
Inspect load rollers for wear or damage. If load
rollers must be replaced, make a note of the lo-
cation and number of shims. Install shims, load
rollers and snap rings. See section Carriage Ad-
justments for correct adjustment.
Carriages Repair, Two-Stage LFL Mast 4000 SRM 1999
16
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