Falk
®
Double Engagement Gear Couplings
•
Installation and Maintenance
Type GL20 • Sizes1010 thru 1070
(Page 1 of 6)
Rexnord, 5555 S. Moorland Rd., New Berlin, WI 53151-7953 USA
458-710
Telephone: 262-796-4060 Fax: 262-796-4064
March 2014
www.rexnord.com
Supersedes 7-01
How To Use This Manual
This manual provides detailed instructions on installation,
maintenance and parts identification for Falk Lifelign® gear
couplings, Type GL. Use the table of contents below to locate
required information.
Table of Contents
Introduction ............................................................... Page 1
Lube Fittings ............................................................... Page 1
Lubrication .............................................................Pages 1-2
Balanced Couplings ................................................... Page 3
Installation & Alignment Instructions .........................Pages 3-4
Annual Maintenance ................................................... Page 4
Installation & Alignment Data ...................................... Page 5
Parts Identification & Parts Interchangeability ................ Page 6
CAREFULLY FOLLOW THE INSTRUCTIONS IN THIS
MANUAL FOR OPTIMUM PERFORMANCE AND TROUBLE
FREE SERVICE.
Introduction
This manual applies to standard coupling Types GL20 with
exposed bolts. For couplings furnished with special features,
refer to assembly drawing furnished with coupling for proper
assembly arrangement and any additional installation
or maintenance requirements. Type GL20 couplings are
recommended for applications that require axial hub
movement and are designed for horizontal operations. Refer to
Factory for vertical applications.
CAUTION:
Consult applicable local and national safety codes
for proper guarding of rotating members. Observe all safety
rules when installing or servicing couplings.
WARNING:
Lockout starting switch of prime mover and remove
all external loads from drive before installing or servicing
couplings.
Lube Fittings
Sleeves have 1/8 NPT lube holes for sizes 1010GL
thru1035GL, and 1/4 NPT for sizes 1040GL thru 1070GL.
Use a standard grease gun and lube fittings.
Lubrication
Adequate lubrication is essential for satisfactory operation.
Because of its superior lubricating characteristics and low
centrifuge properties, Falk Long Term Grease (LTG) is highly
recommended.
Gear couplings initially lubricated with Falk Long Term grease
(LTG) will not require re-lubrication for up to three years.
The use of general purpose grease requires re-lubrication
of the coupling at least every six months. If coupling leaks
grease, is exposed to extreme temperatures, excessive moisture,
experiences frequent reversals or axial movements; more
frequent lubrication may be required.
USDA Approved
LTG has the United States Department of Agriculture Food Safety
& Inspection Service approval for applications where there is no
possibility of contact with edible products. (H-2 ratings).
Long Term Grease (LTG)
The high centrifugal forces encountered in couplings separate
the base oil and thickener of general purpose greases. Heavy
thickener, which has no lubrication qualities, accumulates in the
tooth mesh area of gear couplings resulting in premature mesh
failure unless periodic lubrication cycles are maintained.
Falk Long Term Grease (LTG) was developed specifically for
couplings. It resists separation of the oil and thickener. The
consistency of Falk LTG changes with operating conditions.
As manufactured it is an NLGI #1/2 grade. Working of the
lubricant under actual service conditions causes it to become
semifluid while the grease near the seals will set to a heavier
grade, helping to prevent leakage. LTG is highly resistant to
separation, easily out performing all other lubricants tested.
The resistance to separation allows the lubricant to be used for
relatively long periods of time.
Although LTG grease is compatible with most other coupling
greases, the mixing of greases may dilute the benefits of LTG.
CAUTION:
Do not use LTG in bearings. Do not use LTG for low
speed applications. Refer to Table 1 for coupling speed range
of LTG grease.
Packaging
14 oz. (.4 Kg) CARTRIDGES —Individual or case lots of 10
or 60.
35 lb. (16 Kg) PAILS, 120 lb. (54 Kg) KEG & 400 lb. DRUMS.
Specifications — Falk LTG (Long Term Grease)
TEMPERATURE RANGE — –20°F (–29°C) to 250°F (121°C).
Minimum pump = 20°F (–7°C).
MINIMUM BASE OIL VISCOSITY — 3300SSU (715cSt) @
100°F (38°C).
THICKENER — Lithium soap/polymer.
CENTRIFUGE SEPARATION CHARACTERISTICS — ASTM
#D4425–84 (Centrifuge Test) — K36 = 2/24 max, very high
resistance to centrifuging.
NLGI GRADE (ASTM D-217) — 1/2
CONSISTENCY (ASTM D-217) — 60 stroke worked
penetration value in the range of 315 to 360 measured @
77°F (25°C).
DROPPING POINT — 350°F (177°C) minimum.
MINIMUM TIMKEN EP O.K. LOAD — 40 lb (18 kg).
ADDITIVES — Rust and oxidation inhibitors that do not corrode
steel or swell or deteriorate synthetic seals.
Type GL20
