Hyster MAST N30XMH, Repair Manual

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Two-Stage Mast Assembly 4000 SRM 482
Legend for Figure 6
A. OLD STYLE LATCH PIN ASSEMBLY B. NEW STYLE LATCH PIN ASSEMBLY
1. FORK
2. LATCH PIN
3. SPRING
4. WASHER
5. WASHER
6. WEDGE
7. KNOB
8. LEVER
9. ROLL PIN
10. LATCH PIN ASSEMBLY
Remove
Lift the latch lever and slide the fork to the fork re-
moval notch on the carriage. The removal notch is in
the bottom crossmember of the carriage as shown in
Figure 2. Lower the carriage with a block under the
fork or raise the fork tip. See Figure 7. The bottom
hook of the fork will move through the fork removal
notch. Lower the carriage further or raise the fork so
that the top hook of the fork is disengaged from the
top crossmember. Move the carriage away from the
fork, or use the lifting device to move the fork away
from the carriage. Follow the same procedure to re-
move the other fork.
Install
Move the fork or carriage so that the top hook on
the fork engages the top crossmember of the carriage.
Raise the carriage or lower the fork to move the lower
hook through the removal notch. Slide the fork on
the carriage so that both upper and lower hooks are
engaged and the latch pin engages a notch.
1. CARRIAGE BARS
2. HOOK FORK
3. BLOCKS
Figure 7. Hook Fork Removal
Two-Stage Mast Assembly
REMOVE
Read and follow the Safety Procedures When Work-
ing Near Mast, as well as all WARNINGS and CAU-
TIONS.
NOTE:
If the mast assembly will be disassembled af-
ter it is removed from the truck, first remove the
standard carriage or the reach carriage as a complete
assembly. See Carriage Assembly, Remove and In-
stall. If the reach carriage will be removed with the
mast assembly, operate the REACH/RETRACT con-
trol button to retract the forks fully. Install safety
chains so that the forks cannot extend. Install the
safety chains around the center plates of the scis-
sor arm weldment and a crossmember of the mast.
Make sure a safety chain does not touch the mount
for the hose sheave, lift chains, chain or hose sheaves,
hoses, tubes, or fittings.
If installed, operate the
SIDESHIFT control to move the sideshift frame to
the center position.
1. Remove the capscrews and nuts that fasten the
operator guard and remove the guard. See Fig-
ure 8 or Figure 9.
8