Hyster MAST N30XMH, Руководство по ремонту

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Three-Stage Mast Assembly 4000 SRM 482
MAIN CYLINDERS (STANDARD), REMOVE
AND INSTALL
Read and follow the Safety Procedures When Work-
ing Near Mast, as well as all WARNINGS and CAU-
TIONS.
NOTE: It is necessary to remove the mast assembly
from the truck to remove the main cylinders.
1. Remove the mast assembly as described in
Three-Stage Mast Assembly, Remove.
WARNING
The mast weldments can move and cause an in-
jury. Make sure the mast assembly is level with
the carriage side on top to prevent unexpected
movement of the mast weldments.
2. Remove the safety chains that fasten the mast
weldments together and use a pry bar to move
the
intermediate 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 one main 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 the
cylinder rod to the intermediate weldment. See
Figure 12 and Figure 18. If shims are used, make
a note of the shim arrangement. Normally, the
shim arrangement for the replacement cylinder
will be similar.
5. Remove the hose or tube between the main cylin-
der and the flow regulator. See Figure 18. If nec-
essary, use a pry bar to move the carriage and
mast weldments carefully for access. Install a
cap on the regulator fitting to prevent leakage.
6. Install a sling and crane to support the cylinder.
Remove the main cylinder retainer, capscrews,
and washers.
7. Push the cylinder toward the top of the mast as-
sembly to move the main cylinder off the locating
dowel pin. Continue to push the cylinder until
the rod moves into the cylinder to allow removal
from the intermediate weldment.
8. Repeat Step 2 through Step 7 to remove the other
main cylinder.
NOTE: See the section Lift Cylinders 4000 SRM 481
to disassemble and repair the cylinder.
9. Reverse the procedure to install the main cylin-
ders.
MAIN CYLINDERS N30XMH, N30XMH
2
(C210) AND V30ZMD (D210/E210),
REMOVE AND INSTALL
Read and follow the Safety Procedures When Work-
ing Near Mast as well as all WARNINGS and CAU-
TIONS. See Figure 12 and Figure 18.
NOTE:
It is not necessary to remove the mast assem-
bly from the truck to remove the main cylinders.
1. Raise the mast until the secondary upright has
raised approximately 30 cm (1 ft).
NOTE:
The carriage will raise before the secondary
upright.
2. Remove the capscrews, washers, and lock plate
at the base of one main cylinder.
3. Place blocks securely between the stationary and
secondary uprights.
4. Lower the secondary upright onto the blocks and
continue lowering until the carriage is fully low-
ered as well.
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
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