Ingersoll-Rand LCA015, Parts, Operation And Maintenance Manual

18

Overload Device

Refer to Dwg. MHP1302.
1.

Connect the hoist to the air supply.

2.

Release the locknut and turn the adjustment screw in order
to increase or decrease the SWL (increase the SWL by
tightening the adjustment screw). The adjustment must be
made for an overload of 20% maximum of the SWL.

3.

Tighten the locknut securing the adjustment screw.

4.

Check hoist operation at rated load. If necessary repeat the
adjustment.

NOTICE

• Do not change factory settings unless hoist is tested and
recertified at an authorized repair facility.

(Dwg. MHP1302)

 Disassembly

General Instructions

WARNING

• Disconnect the air supply hose before performing any
maintenance or repairs on this hoist.

All maintenance work done on the Liftchain hoist should be
performed on a bench in a clean dust free work area. In the
process of disassembling the hoist, observe the following:
1.

Never disassemble the hoist any further than is necessary to
accomplish the needed repair. A good part can be damaged
during the course of disassembly.

2.

Never use excessive force when removing parts. Tapping
gently around the perimeter of a cover or housing with a
soft hammer, for example, is sufficient to break the seal.

3.

Do not heat a part with a flame to free it for removal, unless
the part being heated is already worn or damaged beyond
repair and no additional damage will occur to other parts.

In general, the hoist is designed to permit easy disassembly and
assembly. The use of heat or excessive force should not be
required.

4.

Keep the work area clean to prevent dirt and other foreign
matter from getting into bearings and other moving parts.

5.

All seals and 'O' rings should be discarded once they have
been removed. New seals and 'O' rings should be used
when assembling the hoist.

6.

When grasping a part in a vise, always use leather- or
copper-covered vise jaws to protect the surface of the part
and help prevent distortion. This is particularly true of
threaded members, machined surfaces and housings.

7.

Do not remove any part which is press fit in or on a
subassembly unless the removal of the part is necessary for
repairs or replacement.

8.

To avoid damaging bearings during hoist assembly or
disassembly always tap or press on the bearing inner race
for shaft fit bearings or the outer race for bore fit bearings.

9.

For assembly work above body height, suitable working
platforms or ladders should be made available.

10. Do not attempt to wash sealed bearings.

If hoists are to be completely disassembled it is recommended
that the motor assembly and brake/gear housing assembly be
removed as complete assemblies from the chain guide housing.
This can be accomplished by removing the capscrews, nuts and
washers that clamp the housings together. Carefully separate
assemblies and clean mating surfaces. Assemblies are Loctited
together.

The muffler is located in the top of the gear housing. To clean
muffler remove retainer ring in gear housing and with the aid of
small pick remove the first muffler plate. Remove 'O' ring,
second muffler plate and last 'O' ring.

Load Chain Replacement

WARNING

• NEVER splice a load chain except when installing a new
load chain by the following method. Always discard the link
used to connect the old chain with the new.

Excessive chain wear cannot be detected by casual observation.
The chain is case hardened and once the case hardening is worn
through, wear will progress rapidly and the strength of the chain
will be considerably reduced. Further, the chain will no longer
fit the chain sprocket properly, greatly increasing the chance of
malfunction and chain breakage.
One chain sprocket will outlast several chains if the chain is
replaced as recommended. The use of a worn chain will cause
the chain sprocket to wear rapidly.
If the chain is visibly damaged, examine the chain sprocket and
chain guide. Install a new chain sprocket if the old one is visibly
worn. Install a new guide if the old one is broken or distorted.

NOTICE

• For ease of installation, do not remove the old chain from
the hoist. Use the old chain to feed the new chain through the
hoist.

1.

The hoist must be hung and connected to the air supply.

2.

Remove chain bucket, if used.

3.

Remove chain stopper.

4.

Remove the load hook.

5.

Run hoist slowly in the lifting direction until the chain free
end is approximately 2 ft (60 cm) from the hoist.

6.

Using an abrasive wheel, cut a section from the last link as
shown in Dwg. MHP0817. Use a 'C' link which is the same
size as the chain. Refer to Table 9.