4000 SRM 482
Three-Stage Mast Assembly
4.
Use a pry bar to remove the load roller from the
mast weldment. See Figure 5.
5.
Use a cloth to clean each load roller. Inspect the
load rollers for cracks, flat spots, or bearings that
do not turn freely. Replace any roller that shows
wear or is damaged.
6.
Reverse the procedure to install the load rollers.
7.
Adjust the wear plugs after all load rollers and
wear plugs are replaced. See Adjust Wear Plugs
- Mast. The wear plugs are adjusted after the
mast assembly is installed on the lift truck.
THREE-STAGE MAST ASSEMBLE,
INSTALL
Read and follow all WARNINGS and CAUTIONS. If
the carriage is installed on the mast, it must have a
safety chain installed as described in Safety Proce-
dures When Working Near Mast.
WARNING
Do not install the three-stage mast assembly
unless it is completely assembled. Mast parts
can move and cause an injury if not fastened
together during assembly.
NOTE:
The inner and intermediate mast assemblies
must be in a position to allow access to the mount
capscrews at the bottom of the outer weldment. Use
safety chains to keep the mast assembly from mov-
ing as described in Safety Procedures When Working
Near Mast.
1.
Use the crane or lifting device to lift the mast
assembly and move it close enough to the truck
to make the necessary connections. Make sure
the truck and mast assembly cannot move.
2.
Install and tighten the mast and carriage hoses
on their correct bulkhead fittings according to the
labels installed during removal.
3.
Move the mast assembly into position. Lower
the mast assembly until the outer weldment is
aligned with the trunnion blocks on the lift truck
frame.
NOTE:
Make sure all hoses and the electrical cable
are not between a mast crossmember and the truck.
4.
Steps 4a through 4d for the N30XMH,
N30XMH
2
(C210) and V30ZMD (D210/E210)
only.
a. Position the mast assembly so the mast
mounting feet are properly aligned.
b. Install the four setscrews until the mast as-
sembly is vertical.
c.
Install the four capscrews and tighten them
to 220 N•m (160 lbf ft). Remove the chain
and crane.
d. Make all adjustments and test the operation
of the mast assembly before returning the
truck to service. See Mast Operation Check.
NOTE:
Make sure all hoses and the electrical cable
are not between a mast crossmember and the truck.
5.
Align the trunnion caps according to the marks
made during removal. Install the capscrews but
leave them loose.
6.
Connect all the wires of the electrical cable ac-
cording to the labels made during removal.
CAUTION
Install tape on all electrical wires for the reach
carriage that are not connected to the carriage.
If the wires are not connected, they can cause
a short circuit and cause damage.
7.
Operate the LIFT/LOWER control to raise the
inner and intermediate weldments high enough
for access to the bottom of the outer weldment.
8.
Install safety chains between the outer, interme-
diate, and inner weldments to keep the interme-
diate and inner weldments from moving.
9.
Use a pry bar to align and install the four mount
capscrews and the nutplates that fasten the bot-
tom of the mast to the truck frame. See Fig-
ure 10. Move the bottom of the weldment in or
out and add shims until the mast is adjusted be-
tween vertical to 1/2 degree back tilt.
10. Tighten the four mount capscrews to 203 N•m
(150 lbf ft).
11. Install the hose clamps and hose bracket. Oper-
ate the LIFT/LOWER control to raise the inner
weldment high enough to carefully remove the
safety chains. Remove the safety chains.
12. Tighten the four trunnion cap capscrews to
203 N•m (150 lbf ft). Use the crane to lower
the inner and intermediate weldments until
35
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: ......
