Use and Care Manual

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Brake Adjustment

Refer to Figure 5.

1. DISCONNECT HOIST FROM POWER SUPPLY and

remove the electrical cover.

2. With reference to Figure 5, the gap between the brake

armature “A” and the field “B” should be checked. The

correct gap is 0.015". Adjustment should not be necessary

until gap reaches 0.040".

3. Adjust gap by adjusting the 3 locknuts “F” and checking with

a feeler gauge to be sure gap is the same on both ends of

the solenoid.

4. Adjustment is now complete and the brake properly set.

Replace the electrical cover, reconnect the power supply,

and check hoist brake action.

HOIST CONTROLS

Both the pushbutton and the reversing contactor are

mechanically interlocked to prevent shorting the circuit and

causing serious damage. As part of maintenance, always

check for proper closure of contact points as well as for burned

contacts. If replacement is necessary, see Figures 16 & 18 for

replacement parts.

WIRING

Refer to Figures 9A and 9B

MILWAUKEE Electric Chain Hoists, which are available for

115/230V or 230/460V, are shipped wired for 115V and 460V

respectively. Conversion of dual voltage hoists to either the

higher or lower voltage can be done simply and quickly as

follows:

1. DISCONNECT HOIST FROM POWER SUPPLY and

remove the electrical cover.

2. Each dual-voltage hoist has a terminal block assembly for

the interconnection of the electrical components of the hoist.

To convert voltage, reconnect the leads to the terminal

blocks according to the wiring diagram located inside the

electrical cover and also in Figures 9A & 9B. DO NOT move

any wires or make any changes to the electrical circuit

except at the terminal block assembly. Tug on wires to

ensure they are securely connected.

3. After converting voltage, recheck phasing and limit switch

operation (See INSTALLATION 2-c & 4, page 5).

IMPORTANT: Always refer to the wiring diagram located on

the inside of the electrical cover or Figures 9A and 9B when

performing electrical repairs. Make sure all connections are

secure and check for damaged insulation. It is also imperative

that the power circuit has conductors of adequate size (See

Table 3).

LUBRICATION

Refer to Figure 11.

Proper lubrication is necessary for a long and relatively trouble-

free hoist operation. Refer to the following and the

RECOMMENDED LUBRICATION SCHEDULE for lubrication

points, type of lubricant, and frequency of lubrication.

Load Chain

Clean the load chain with acid-free solvent and coat with

SAE 90 gear oil. Wipe excess oil to prevent dripping. Never

apply grease to the chain.

Gearing

The gear case of this hoist is filled at assembly with

approximately 1½ pints of SAE 90 EP gear oil. Check oil level

by removing the oil level check plug from the side of the hoist.

With the hoist hanging level, gear oil should be even with the

hole. Change oil periodically depending on the severity of the

application and the environmental conditions (at least every

200 hours of run time).

Bearings

All bearings except hook and idler sheave bearings are

lubricated at the factory and should not require additional

lubrication. Noisy or worn bearings should be replaced.

Limit Switch Shaft

Remove any dirt accumulation and spray with a general

purpose lubricant.

Hook Bearing

Apply a few drops of SAE 30 gear or motor oil around the edge

of the bearing.

Idler Sheave Bearing (Bushing)

Disassemble load block and apply a light coat of NLGI #2

grease, or equivalent, inside of bearing.

HOIST REPAIRS

NOTE: If you do not have an experienced mechanic to do your

repair work, we recommend that you send your hoist to an

approved service station for repairs. Use authorized repair

parts only.

1. For major repairs or when the hoist is to be sectioned in the

suspension area, it will be necessary to move the hoist to a

workbench or table.

Milwaukee Electric Tool Corporation

13135 West Lisbon Road

Brookfield, Wisconsin 53005

TEL: (800) 729-3878

Be sure the bottom of the armature does not bear

against the splined adapter “H”. As adjustments are

made, the built-in clearance will be reduced. When

this clearance is gone REPLACE BRAKE DISCS.

Minimum allowable disc thickness is .162". See

Figure 15 for further illustration.

Figure 5 — Brake Assembly

Gap