JET 211500 Use and Care Manual download pdf (Page 12)

durability. Over a period of time, the chain may

need to be replaced. For your own safety, use

factory replacement chain only. Use of other

than factory replacement chain may cause

serious injury and/or damage to the hoist.

A light coat of 30-weight oil applied periodically to

the chain will create easier operation and prolong

the life of the chain.

Inspecting the Hooks

It is important to check top and bottom hooks for

proper opening and other signs of deformation or

damage. Replace a hook immediately if any of the

following problems are identified:

1. The safety latch no longer contacts the hook

opening.

2. The vertical angle at the neck of the hook

reaches 10° (see Figure 12).

Figure 12

3. Chemical corrosion or cracks on the hook.

4. Excessive wear on the inside surface.

5. The throat opening has enlarged. (See page

18 for the maximum allowable limits for the

throat opening.)

NOTE: Excessive hook throat opening or twist

indicates abuse or overloading of the hoist. If such

deformation is discovered, inspect hoist, chain and

all supporting members very carefully for additional

indications of excessive hoist loading.

Do not attempt repair of a hook

by heat treating, bending or attaching anything

by welding. Such procedures will weaken and

may cause failure of the hook.

Operating the Hoist

Allow the hoist to come to a full stop before

changing direction. Rapidly reversing or catching a

falling load can overload the hoist system and

cause a failure in the hoist and/or chain, resulting

in injury or property damage.

If the hoist is connected to a manual trolley, move

the hoist by pushing on the suspended load. Move

an unloaded hoist by pulling on the empty hook.

Do NOT move the hoist by pulling on the pendant

cord.

The brake mechanism must be kept clean and free

from dirt, water, and oil. Never allow oil to

penetrate the brake mechanism. Always keep your

hoist clean, and store in a clean, dry location.

Follow this general procedure for hoisting loads:

1. Secure the upper hook to the supporting

structure.

2. Place load sling or chain in the center of the

bottom hook, making sure the safety latch is

secure. Never load the hook in front of the

safety latch. See Figure 13.

Figure 13

3. Avoid lifting one load with two hoists. If this is

unavoidable, apply equal weight to both hoists

and use hoists with the proper lift capacity.

Capacity of each hoist must be equal to the

total load to be lifted.

4. Press UP button and remove all slack in load

chain. Increase tension in the load chain until

the hoist is about to raise the load.

5. Check again that the load is properly slung,

directly under hoist, and will not suddenly

swing or twist.

6. Raise load an inch or two above the ground

and stop. Observe load for a few moments,

looking for signs that the load or hoist system

is unstable, or other indications that there is a

problem.

7. Check that the chain is not twisted at the

bottom hook. All welds should face the same

direction (see Figure 15). For hoists with two or

more falls of chain, make sure the bottom hook

is not turned over. This may cause the chain to

twist.

8. Raise load to the traveling height. Raise only

to the height necessary to safely clear all

obstacles.

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JET 211500 Use and Care Manual Page 12

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