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6
Also check chain for stretch using a vernier caliper as shown
above. 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.
If the result (amount of stretch and wear) is greater than
0.145 inch (3.7 mm), the chain must be replaced.
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 frame, stripper, and liftwheel
should be examined for wear and replaced as necessary
when replacing worn chain.
Also, the load chain is 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 cleaning and lubrication 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 cleanings.
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 10 thru 13.
NOTE: To assure extra long life and top performance, be
sure to lubricate the various parts of the hoist using the
recommended lubricants. These lubricants may be
purchased from Yale. Refer to page 13 for information on
ordering the lubricants.
Except for lubricating the load chain frequently, the hoist
requires no additional lubrication, unless it has been
disassembled for cleaning, inspection and/or repairs. If the
unit has been disassembled, remove the “old” lubricant from
the parts and apply new lubricants as follows:
A. A light coat of Texaco Novatex #2, or equal, grease to:
• Needle bearings in gear cover (673-5) and frame
(673-2).
• Inside of pinion bushing (673-25).
• Outside surface of cam pins (673-47).
• Inside diameter and the cam pin slots in cam (673-18).
• Outside surface of suspension bolt (673-48).
• Spline of liftwheel (673-10).
• Outside surface of locking pins (673-78).
B. A light coat of Lubrico M-32 (Master Lubricant Co.) or
equal grease to inside diameter of lever head (673-39).
C. A light coat of Moly-Duolube #67 (Hercules Packing Co.)
or equal dry film lubricant to threads and spline of pinion
(673-9).
D. A light coat of a *graphite/grease mixture to knob of
upper and lower hooks (673-35) and bearing journals of
3 ton lower sheave (673-70).
E. 1/2 oz. on 3/4 ton unit and 2/3 oz. on 1-1/2 and 3 ton
units of Texaco Novatex #2, or equal grease to pinion
(673-9) teeth, liftwheel gear (673-11) teeth and in gear
cavity of frame (673-2).
F. A light coat of a **graphite/oil mixture to tip of lever
plunger (673-46) for approximately 1 inch (25.4mm) and
threaded end (up to including the spline) of the pinion
shaft (673-9).
G. See above for lubricating load chain.
* graphite/grease mixture consists of 1 lb. (.46 Kg.) Superior
Graphite Co. #590 flake graphite and 2 lb (.92 Kg.) of Master
Lubricant Co. Lubricko M-32 grease.
**graphite/oil mixture consists of 1 oz. of Superior Graphite
Co. #590 flake graphite and 1 qt. (946 ml) of Acheson
Industries #DAG-154RFU oil.
WARNING
USED MOTOR OILS MAY CONTAIN KNOWN
CARCINOGENIC MATERIALS.
TO AVOID INJURY:
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.
WARNING
THE LUBRICANTS USED IN AND RECOMMENDED
FOR THE RS2 LEVER 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.
WARNING
USING OTHER THAN YALE 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 HOISTALOY
®
LOAD CHAIN IN THE RS2 LEVER
HOIST.
Vernier Caliper
Measure
11 Pitches
One
Pitch