Hyster MAST N30XMH, Руководство по ремонту

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Safety Procedures When Working Near Mast 4000 SRM 482
Safety Procedures When Working Near Mast
The following procedures MUST be used when in-
specting or working near the mast. Additional pre-
cautions and procedures can be required when re-
pairing or removing the mast.
WARNING
Mast parts are heavy and can move. Distances
between parts are small.
Serious injury or
death can result if part of the body is hit by
parts of the mast or the carriage.
• Never put any part of the body into or under
the mast or carriage unless all parts of the
mast or carriage are completely lowered or
a safety chain is installed.
• Make sure that the power is off and the key
is removed. Put a DO NOT OPERATE tag in
the operator’s compartment. Disconnect the
battery and put a tag or lock on the battery
connector.
• Be careful of the forks. When the mast is
raised, the forks can be at a height to cause
an injury.
• DO NOT climb on the mast or lift truck at any
time. Use a ladder or personnel lift to work
on the mast.
• DO NOT use blocks to support the mast weld-
ments nor to restrain their movement.
• Mast repairs require disassembly and re-
moval of parts and can require removal of
the mast or carriage. Follow the repair pro-
cedures in this manual.
WHEN WORKING NEAR THE MAST, ALWAYS:
• Lower the mast and carriage completely.
Push the lift/lower control and make sure
there is no movement in the mast. Release
the lift/lower control. Make sure all parts of
the mast that move are fully lowered.
OR
• If parts of the mast must be in a raised po-
sition, install a safety chain to restrain the
moving parts of the mast. Connect moving
parts to a part that does not move. Follow
these procedures:
NOTE: Mast operator guard must be removed to in-
stall safety chain. Remove safety chain and install
the guard after repairs are complete.
1. Raise the mast to align the bottom crossmem-
ber of the weldment that moves in the outer
weldment with a crossmember on the outer
weldment. On the two-stage mast, the moving
part is the inner weldment. On the three-stage
mast, it is the intermediate weldment. See Fig-
ure 1.
2. Use a 3/8-inch minimum safety chain with a
hook to fasten the crossmembers together so the
movable member cannot lower. Put the hook on
the back side of the mast. Make sure the hook
is completely engaged with a link in the chain.
Make sure the safety chain does not touch lift
chains, chain sheaves, tubes, hoses, fittings, or
other parts on the mast.
3. Lower the mast until there is tension in
the safety chain and the free-lift cylinder
(three-stage mast only) is completely retracted.
Move the key to the OFF position and remove
the key from the key switch. Put a DO NOT
OPERATE tag in the operator’s compartment.
Disconnect the battery and put a tag or lock
on the battery connector.
Install a DO NOT
REMOVE tag on the safety chain(s).
4. Install another safety chain (3/8-inch minimum)
between the top or bottom crossmember of the
carriage and a crossmember on the outer weld-
ment.
2