4000 SRM 482
Two-Stage Mast Assembly
Legend for Figure 11
1.
INNER WELDMENT
2.
OUTER WELDMENT
3.
BUSHING
4.
SCREW
5.
NUT
6.
LOAD ROLLER
7.
SNAP RING
8.
PLUG
9.
PIN
LIFT CYLINDERS, REMOVE AND INSTALL
DUAL-LIFT CYLINDERS
NOTE:
It is necessary to remove the mast assembly
from the truck to remove the lift cylinders.
1.
Remove the mast assembly as described in Re-
move.
WARNING
The mast weldments can move and cause an
injury even if the mast assembly has been re-
moved from the lift truck. Make sure the mast
assembly is level to prevent the components
from moving without being moved. Use safety
chains to prevent movement after components
are in the correct position.
2.
Remove the safety chains that fasten the mast
weldments together and use a pry bar to move
the inner weldment approximately 75 mm (3 in.)
out of the outer weldment carefully and slowly.
3.
Remove the capscrews, washers, and lock plate
at the base of the lift cylinder.
WARNING
Be careful when removing or installing snap
rings.
These snap rings are large and can
come loose during removal or installation with
enough force to cause an injury. Always use
the correct snap ring pliers and wear eye and
face protection during removal or installation.
4.
Remove the snap ring, backup washer, rubber
bushing, and shims (if applicable) that fasten one
cylinder rod to the inner weldment.
See Fig-
ure 12. If shims are used, make a note of the
shim arrangement. Normally, the shim arrange-
ment for the replacement cylinder will be similar.
5.
Remove the hose or tube between the lift cylinder
and the flow regulator. See Figure 10. Install a
cap on the regulator fitting to prevent leakage.
1.
INNER WELDMENT
LIFT CYLINDER
3.
OUTER
WELDMENT
4.
SNAP RING
5.
WASHER
6.
RUBBER BUSHING
7.
SHIMS (IF
REQUIRED)
8.
RETAINER
9.
LOCK PLATE
Figure 12. Lift Cylinder Removal
13
Summary of Contents for MAST N30XMH
Page 14: ...Two Stage Mast Assembly 4000 SRM 482 Figure 10 Two Stage Mast Assembly Dual Lift Cylinders 10 ...
Page 27: ...4000 SRM 482 Three Stage Mast Assembly Figure 18 Three Stage Mast Assembly 23 ...
Page 34: ...Three Stage Mast Assembly 4000 SRM 482 Figure 21 Hose and Cable Assemblies Outer Weldment 30 ...
Page 51: ......