CM-ET Prostar - Manual (Page 9)

If the stock diameter of the worn link is 0.010 inches
(0.254mm), or more, less than the stock diameter of the
unworn link, the chain must be replaced.
On the Double-reeved units, repeat this examination of the
chain that passes through the hook block.
Also check chain for stretch using a vernier caliper as
shown in Figure 6B. Select an unused, unstretched section
of chain (usually at the loose end) and measure and record
the length over 11 chain links (pitches). Measure and record
the same length on a worn section of chain. Obtain the
amount of stretch and wear by subtracting the measurement
of the unworn section from the measurement of the worn
section. Based upon ASME B30.16 2007.Select an unworn,
unstretched length of the chain (at the slack end for
example). Suspend the chain vertically under tension and,
using a caliper-type gauge, measure the outside length of
any convenient number of links approximately 12" to 24".
Measure the same number of links in the use sections and
calculate the percentage in increased length.
Replace if length of the used portion is more than 1 1/2%
longer than the unused portion of the chain. Based upon
ASME B30.16 2007.
Use only a “Knife-edge” caliper to eliminate possibility of
false reading by not measuring full pitch length.
Note that worn chain can be an indication of worn hoist
components. For this reason, the hoist’s chain guide, hook
block and liftwheel should be examined for wear and
replaced as necessary when replacing worn chain.
Also, these chains are specially heat treated and hardened
and should never be repaired.
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 replaced
chain into short lengths to prevent use after disposal.
Chain Lubrication
A small amount of lubricant will greatly increase the life of
load chain. Do not allow the chain to run dry.
Keep it clean and lubricate at regular intervals with
Lubriplate ® Bar and Chain Oil 10-R (Fiske Bros. Refining Co.)
or equal lubricant. Normally, weekly lubrication and cleaning
is satisfactory, but under hot and dirty conditions, it may be
necessary to clean the chain at least once a day and
lubricate it several times between cleaning.
When lubricating the chain, apply sufficient lubricant to
obtain natural run-off and full coverage, especially in the
interlink area.
LUBRICATION
Refer to Exploded View and Parts List pages 15 through 19.
NOTE: To assure extra long life and top performance, be
sure to lubricate the various parts of the Prostar Hoist
using the lubricants specified below. If desired, these
lubricants may be purchased from the factory. Refer to
page 19 for information on ordering the lubricants.
Gears
• The Protector (620-111) should operate for the normal life of
the hoist without service. The device has been lubricated
and calibrated by the factory and should not be adjusted.
CAUTION: The Protector™ is to be used with “Century
Lubricants HB-11, #3” grease. Do not use any other
grease or the Protector will not operate properly and
parts could be damaged.
The gears and Protector are packed at assembly with
grease and should not need to be renewed unless the gears
have been removed from the housing and degreased.
CAUTION: Never degrease the Protector™ or attempt to
disassemble this device. Degreasing the Protector may
damage parts and using a device that has been degreased
may cause erratic, inconsistent operation. If the Protector
has been degreased, it must be replaced by a factory
calibrated device.
Figure 7A Figure 7B
8
Use only Star (H) grade load chain and factory
replacement parts. Use of other chain and parts may
be dangerous and voids factory warranty.
Use of commercial or other manufactures’ chain and parts to
repair hoists may cause load loss.
TO AVOID INJURY:
Use only factory supplied replacement load chain and parts.
Chain and parts may look alike, but our chain and parts are made
of specific materials or processed to achieve specific properties.
Used motor oils contain known carcinogenic materials.
TO AVOID HEALTH PROBLEMS:
Never use used motor oils as a chain lubricant. Only use
Lubriplate ® Bar and Chain Oil 10-R as a lubricant for the
load chain.
The lubricants used in and recommended for the Prostar Hoist
may contain hazardous materials that mandate specific handling
and disposal procedures.
TO AVOID CONTACT AND CONTAMINATION:
Handle and dispose of lubricants only as directed in applicable
material safety data sheets and in accordance with applicable
local, state and federal regulations.
Assembly-
Brake Driver
Includes Coil
Brake Spring
Brake Armature
Brake Base Plate
Brake Disc
Brake Field
First Pinion
Shaft
Brake Assembly
Gap