Lifting System; Safety Procedures When Working Near Mast - Yale A7S1 Service Manual

Lifting System

SAFETY PROCEDURES WHEN WORKING
NEAR MAST
WARNING
The following procedures MUST be used when
inspecting or working near the mast. Additional
precautions and procedures can be required when
repairing or removing the mast. See the correct
Service Manual section for the specific mast being
repaired.
• Never put any part of the body into or under the
mast or carriage unless all parts are completely
lowered or a safety chain is installed. Also 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
on electric lift trucks 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
•
weldments or to restrain their movement.
Mast repairs require disassembly and removal
•
of parts and can require removal of the mast or
carriage. Follow the repair procedures in the
correct Service Manual for the mast.
WHEN WORKING NEAR THE MAST ALWAYS:
Lower the mast and carriage completely. Push
•
the lift/lower control lever forward and make
sure there is no movement in the mast. Make
sure that all parts of the mast that move are fully
lowered.
OR
60
Lifting System
If parts of the mast must be in a raised position,
•
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:
1. Put mast in vertical position.
2. Raise mast to align bottom crossmember of
weldment that moves in the outer weldment with
a crossmember on the outer weldment. On the
two-stage and free-lift mast, the moving part is
the inner weldment. On the three-stage mast, it is
the intermediate weldment. See Figure 58.
3. 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 or
chain sheaves, tubes, hoses, fittings, or other
parts on the mast.
4. Lower mast until there is tension in the safety
chain and the free-lift cylinder (three-stage) is
completely retracted. If running, stop the engine.
Apply parking brake. Install a DO NOT REMOVE
tag on the safety chain(s).
5. Install another safety chain (3/8 inch minimum)
between the top or bottom crossmember of the
carriage and a crossmember on the outer
weldment. See Figure 58.
NOTE: Apply parking brake. After lowering or
restraining the mast, shut off power and remove key.
Put a DO NOT OPERATE tag in the operator's
compartment. Disconnect battery on electric lift trucks
and put a tag or lock on battery connector.
8000 YRM 2199