Models
Replace Hook When Opening is
Greater Than
WB, WF
1-3/16
WE, WH, WJ & WL
1-5/16
WR
1-1/2
Figure 9. Hook Inspection
Hook Inspection
Hooks damaged from chemicals, deformations or cracks, or
that have more than a 10° twist from the hook’s unbent plane
or excessive opening or seat wear must be replaced. Also,
hooks that are opened and allow the latch to not engage the
tip, must be replaced. Any hook that is twisted or has exces-
sive throat opening indicates abuse or overloading of the
unit. Inspect other load sustaining parts for damage.
On latch type hooks, 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. See Figure 9 to determine when the hook must be
replaced.
Protector™
The Protector™ should operate for the normal life of the hoist
without service. The device has been lubricated and calibrat-
ed at the factory for a specific model of hoist and is not
adjustable or interchangeable with other models. For proper
overload protection be sure before installing a Protector™
that it is correct for the unit. The spring washer of the
Protector™ has been color coded at the factory as follows:
Models
Protector™ Color Code
WB, WE
White
WE, WH
Orange
WJ
Red
WL, WR
Green
LOAD CHAIN
Clean 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 inspec-
L
L
!!
WARNING
Removing the snap ring on the Protector™ assembly will
allow the parts to spring apart.
TO AVOID INJURY:
Do not attempt to disassemble the Protector™.
tion for nicks, gouges, twisted links, stretching and excessive
wear. In particular, observe the bearing surface between
links, and if any of these conditions exist, the load chain must
be replaced. 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 10. 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 service-
able limits, it is sometimes possible to reverse the load chain,
end for end, and allow a new section to take the wear.
Removal and installation of the load chain is covered in sub-
sequent paragraphs.
To aid in gaging load chain wear. A chain gage can be
obtained from CM. This can be obtained by ordering chain
gage Part No. 3191.
CAUTION: Before installing new load chain, the unit
must be disassembled to allow inspection for dam-
age or wear and replacement, if required, of mating
parts (liftwheel, chain guides, motor and gear hous-
ings).
Figure 10. Gaging Load Chain Wear
Dia. of
No. of Links Max. Gage Length
Models
Chain Stock
to Gage
Allowable
Used Chain
WE, WB,
0.250"
19
14-13/16"
WF & WH
WJ, WL,
0.312"
21
18-7/8"
and WR
When installing new load chain or mating parts, refer to
Lubrication on page 12.
IMPORTANT: Do not use replaced chain for other
purposes such as lifting or pulling. Load chain may
break suddenly without visual deformation. For this
reason, cut worn chain into short lengths to prevent
use after disposal.
L
L
!!
WARNING
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.
TO AVOID INJURY:
Due to size requirements and physical properties, use only CM
HOISTALOY
®
load chain in the CM Valustar Hoists.
11
MEASURE
OPENING
LATCH TYPE HOOK
(Upper and Lower)
TO MEASURE OPENING,
DEPRESS LATCH
AGAINST HOOK BODY
AS SHOWN
For more information contact: Sievert Crane and Hoist, (708) 771-1600, [email protected], www.sievertcrane.com
