Mast Adjustments
4000 SRM 482
WARNING
NEVER loosen the wear plugs if a mast weld-
ment does not move freely during checks after
an adjustment. The weldments or carriage can
suddenly move and cause an injury. Raise the
weldment, move the key to the OFF position,
and install safety chains as described in Safety
Procedures When Working Near Mast. Loosen
the wear plugs to allow movement.
6.
If necessary, operate the system so that the lift
chains are the supports and carefully remove the
safety chains. Raise and lower the weldments
with a load. Check that there is minimum clear-
ance, as described in Step 3, with free movement.
If the weldments do not move smoothly during
lowering, follow the WARNING and adjust the
wear plugs equally for more clearance.
7.
Repeat Step 1 through Step 6 for each weldment.
ADJUST FREE-LIFT CHAIN
(THREE-STAGE ONLY)
NOTE:
Make sure the forks of the reach carriage are
parallel to the floor (no forward or backward tilt). See
Figure 26.
1.
Fully lower the carriage. Measure the distance
from the floor to the bottom of the carriage.
The correct distance is 82.55 mm (3.25 in.). For
the N30XMH, N30XMH
2
(C210), and V30ZMD
(D210/E210) the distance is 76 mm (3.0 in.).
2.
If the distance is correct, the free-lift chains are
adjusted for the correct height. Perform Step 5
next. If the distance is NOT correct, perform all
of the steps.
3.
Raise the mast until the free-lift cylinder chain
anchors at the rear of the free-lift cylinder can be
accessed from the operator compartment. Install
safety chains as described in Safety Procedures
When Working Near Mast. Remove the mast op-
erator guard for easier access to the chain an-
chors. See Figure 8. Loosen both lock nuts at
the chain anchors to make any adjustments.
4.
Adjust the nuts of the chain anchors equal
amounts for the correct distance (Step 1).
5.
Check chain tension by pushing on both chains
at the same time. If the tension is not the same,
adjust the nuts on the chain anchors until the
tension is the same and the distance (Step 1) is
also correct. When the tension is equal on both
chains, the chain sheave assembly will be level.
Tighten the lock nuts.
CAUTION
When the chain adjustments are complete,
make sure the cotter pin at the bottom of the
chain anchor can be installed under the ad-
justment nut.
If there is no room to install
the cotter pin, the chains are too short. Make
sure the lock nuts on the chain anchors are
tight against the mount plate. If there are not
enough threads on the chain anchor for cor-
rect adjustment, new chains are too long or old
chains are too worn. See Lift Chains Check.
6.
Check the mast operation as described in Mast
Operation Check.
7.
Install the mast operator guard if removed.
40
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: ......
