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HOOK INSPECTION
Hooks damaged from chemicals, deformations or cracks or that
have more than a 10° twist from the plane of the unbent hook or
excessive opening or seat wear must be replaced.
Also, hooks that are opened and those that allow the latch to
disengage the tip, must be replaced.
Any hook that is twisted or has excessive throat opening indicates
abuse or overloading of the unit. Other load-sustaining components
of the hoist should be inspected for damage.
The chart below should be used to determine when the hook must
be replaced. To measure throat opening, depress the latch against
the hook body as shown below.
MEASURE
OPENING
Hoist Rated Load Tons (kg)
1/2 (500)
1 (1000)
2 (2000)
3 (3000)
5 (5000)
Also, check to make sure that the latch is not damaged or bent and
that it operates properly with sufficient spring pressure to keep the
latch tightly against the tip of the hook and allow the latch to spring
back to the tip when released. If the latch does not operate properly,
it should be replaced.
LOAD CHAIN
CLEANING AND INSPECTION
First clean the load chain with a non-acid or non-caustic type solvent
then slack the chain and make a link-by-link inspection for nicks,
gouges, twisted links and excessive wear or stretching. Worn chain
should be gaged throughout its entire length and replaced if beyond
serviceable limits.
To determine if load chain should be continued in service, check
gage lengths as indicated in figure below. Chain worn beyond length
indicated, nicked, gouged or twisted should be replaced before
returning hoist to service. Chain should be clean, free of twists and
pulled taut before measuring. In cases where the wear is localized
and not beyond serviceable limits, it is sometimes possible to
reverse the load chain, end for end, and allow a new section to take
the wear. Proper installation of the load chain is covered in section
on Reeving Load Chain (page 7).
CMK_12346 622 Series Hoist Manual Rev AB_v1.indd 5
Hoist Rated Load
Note that worn chain can be an indication of worn hoist
components. For this reason, the hoist's chain guide roller and
liftwheel should be examined for wear and replaced as necessary
when replacing worn chain.
Also, load chains are specially heat treated and hardened and should
never be repaired.
Using other than CM-supplied load chain may cause the chain to
jam in the hoist and/or allow the chain to break and the load to drop.
Replace Hook When Opening is
Due to the size requirements and physical properties, use only
Greater Than:
CM Hoistaloy
inches
mm
IMPORTANT: Do not use replaced chain for other purposes such
as lifting or pulling. Load chain may break suddenly without
1.19
30.2
visual deformation. For this reason, cut replaced chain into short
1.34
34
lengths to prevent use after disposal.
1.71
43.5
Before returning chain to service or after replacing a load chain,
lubricate liberally with Lubriplate Bar and Chain Oil 10-R (Fiske Bros.
2
50.9
Refining Co.) or equal lubricant. Remove excess lubricant from the
2.52
64
chain by wiping with a cloth.
HAND CHAIN
Hand chain should be cleaned, inspected and gaged in the same
manner as load chain.
As received from the factory, the hand chain contains an unwelded
link. This link can be placed in a vise and twisted open to facilitate
changing chain length. Please note that opening and closing of
the connecting link more than twice is not recommended. Also,
connecting links must not be made by cutting the weld side of a
standard hand chain link.
Hand chain should be assembled to handwheel free from twists with
weld on vertical link facing inwards towards handwheel and weld on
horizontal link facing towards the handwheel side plate.
Care must be taken to assure that there is no twist in the
hand chain loop.
LUBRICATION
The Lubricants used in and recommended for the Series 622A Hand
Hoist may contain hazardous materials that mandate specified
handling and diposal procedures.
Handle and dispose of lubricants only as directed in applicable
material safety data sheets and in accordance with applicable
local, state and federal regulations.
Lubricate load chain with a light coat of Lubriplate Bar and Chain
Oil 10-R (Fiske Bros. Refining Co.) or equal lubricant. Be sure the
lubricant reaches the bearing surfaces between the links. Remove
excess oil from the chain.
5
(ENGLISH)
Chain Stock
Tons (kg)
Diameter - in. (mm)
1/2 (500)
0.236 (6)
1 (1000)
0.236 (6)
2 (2000)
0.315 (8)
3 (3000)
0.315 (8)
5 (5000)
0.394 (10)
Hand Chain
0.198 (5)
TO AVOID INJURY:
load chain in the Series 622A Hand Hoist.
®
AVOID CONTACT AND CONTAMINATION:
Manual P/N: 192052171 Rev AB November 2018
Max. Length
No. of Links to
Allowable for
gage
used Chain - in.
(mm)
11
8.50 (215.9)
11
8.50 (215.9)
11
11.33 (287.9)
11
11.33 (287.9)
11
14.17 (359.9)
11
11.55 (293.3)
11/7/18 8:55 AM
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