CM-ET Prostar - Manual (Page 10)

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If the gears are removed from the housing, wipe the excess
grease off the outside surfaces of the Protector with a soft
cloth and degrease the remaining gears and housings.
Upon reassembly, add 2 oz. of the above grease to gears
and housing. Also, coat the spline on the end of the first
pinion and shaft (620-131) with a Molydisulphide lubricant
such as Moly-Duolube 67 (Hercules Packing Co.).
Bearings
Rotor bearings (620-102 and 620-103) are pre-lubricated
and require no lubrication. Needle bearings (620-109, 620-
114, 620-115, 620-128 and 620-164) are packed at
assembly with grease and should not need to be
relubricated. However, if the housings (620-113 and 620-
107), liftwheel (620-127) or sheave wheel (620-162) have
been degreased, these bearings should be greased using
“Century Lubricants HB-11, #3” grease.
Seals
When reassembling the unit, wipe the inside surface of the
seals (620-108 and 620-130) with “Century Lubricants HB-
11, #3” grease.
Hook Block
If the hook blocks are disassembled for inspection
purposes, wipe the grease from the hook knob and the hook
knob cavities in the hook blocks. At reassembly, coat the
underside of the hook knob and the knob bearing surfaces
of cavities in the hook blocks with Molykote BR-2-S (Dow
Corning Corp.) grease or equivalent.
Chain Guide, Liftwheel and Sheave Wheel
• When the hoist is disassembled for inspection and/or
repair, the chain guide, stripper, sheave wheel (on double
chain unit) and liftwheel must be lubricated with
Lubriplate ® Bar and Chain Oil 10-R (Fiske Bros. Refining
Co.) prior to reassembly. The lubricant must be applied in
sufficient quantity to obtain natural runoff and full coverage
of these parts.
Load Chain
Refer to page 7 for lubrication of the load chain.
Exterior Finish
The exterior surface of the hoist has a durable, scratch
resistant baked powder coating. Normally, the exterior
surfaces can be cleaned by wiping with a cloth. However, if
the finish is damaged, compatible touch-up paint can be
purchased from the factory. Refer to page 19 for information
on ordering the paint.
ELECTRIC BRAKE
The brake is non-adjustable with a nominal .004 inch (0.102
mm) air gap and the brake disc must be replaced when the
air gap reaches .012 inch (0.305 mm). The brake spacer
should be no more than .012 inch (0.305 mm) thicker than
the combined thickness of the brake disc and armature
plate. Refer to Figure 7B, page 8.
To inspect the brake gap, disconnect the hoist from power
and remove brake end cover (620-132).
1. Refer to Figure 8B and disassemble the brake. Depress
and hold the field assembly (620-122) while removing the
four brake screws (620-124). The field assembly is under
spring pressure and will spring-out if not held. Examine
the base plate (620-116), brake disc (620-117) and
armature (620-118) for excessive wear, scoring or
warpage. Make sure the brake disc is not glazed, the coil
firmly fixed in the field (620-122) and the brake spring
(620-123) is not damaged. Worn, scored, warped, glazed
or damaged parts should be replaced before preceding.
2. Refer to Figure 8B and assemble the brake. Depress
and hold the field assembly (620-122) while installing the
four brake screws through the brake parts and mount the
brake on the gear housing (620-113). Tighten the four
brake screws (620-124) to 25 in.lb. (2.8 NM).
PROTECTOR™
The Protector should operate for the normal life of the hoist
without service. The device has been lubricated and
calibrated and it should not be adjusted. If the Protector is
not operating properly (see testing on page 14), it must be
replaced with a properly calibrated unit from the factory.
PREVENTATIVE MAINTENANCE
A preventative maintenance program should be established
to prolong the useful life of the hoist and maintain its reliability
and continued safe use. The program should include the
periodic and frequent inspections with particular attention
being paid to the lubrication of the various components using
the recommended lubricants (see page 19).
Failure to follow proper lockout/tagout procedures may present the
danger of electrical shock.
TO AVOID INJURY:
Disconnect power and lockout/tagout disconnecting means before
removing cover or servicing this equipment.
Figure 8A Figure 8B