Goulds Pumps 3501 Mixer - IOM - Manual (Page 31)

GREASE LUBRICATED BEARINGS
Grease lubricated bearings are pre-lubricated at the
factory. We recommend regreasing bearings every 2000
operating hours or 3 months. Refer to
Table 5 for
re-grease amounts.
Table 5
Grease Amounts
Frame
Initial Grease Regrease 1
Thrust
(Angular
Contact)
Radial
(Cylindrical
Roller)
Thrust
(Angular
Contact)
Radial
(Cylindrical
Roller)
Grams Oz. Grams Oz. Grams Oz. Grams Oz.
M 290 10 180 7.0 115 4.0 70 2.5
L 475 17 280 10 200 7.0 115 4.0
XL 800 28 450 16 345 12.0 190 6.5
1 Amount is based on purging half of the old grease from the
housing reservoir.
Regrease Procedure:
NOTE: When regreasing, there is danger of
impurities entering the bearing housing. The grease
container, the greasing device, and fittings must be
clean.
1. Wipe dirt from grease fittings.
2. Remove two (2) grease relief plugs (408C) (Fig. 22).
3. Fill both grease cavities through fittings with
recommended grease until fresh grease comes out of
the relief holes (408C).
4. Ensure frame seals (332A, 333B) are seated in
bearing housing and, if not, press in place with drains
located at the bottom.
5. Run mixer for about 2 hours or until grease stops
emitting from housing and replace two (2) relief
plugs (408C).
NOTE: The bearing temperature usually rises after
regreasing due to an excess supply of grease.
Temperatures will return to normal after mixer has
run and purged the excess from the bearings, usually
two to four hours.
For most operating conditions a lithium based mineral oil
grease of NLGI consistency No. 2 is recommended. This
grease is acceptable for fluid temperatures of -15°C to 110°C
(5°F to 230°F). Bearing temperatures are generally about
25°C (45°F) higher than bearing housing outer surface
temperature.
Acceptable Greases:
Mobil Mobilux EP2
Exxon Unirex N2
Texaco Multifak 2
Shell Alvania 2 EP Grease 2
Sunoco Multipurpose EP
SKF LGMT 2
p
! CAUTION
Never mix greases of different consistency (NLGI 1
or 3 with NLGI 2) or different thickener soaps
(sodium or calcium with lithium). The consistency
usually becomes softer and will not provide adequate
lubrication to the bearings.
For operating temperatures above 110°C (230°F) the
bearings should be lubricated with a high temperature
grease. Mineral oil greases should have oxidation
stabilizers and a consistency of NLGI 3.
Acceptable Greases:
Exxon Unirex N3
SKF LGHT3
NOTE: If these greases are used, disassemble the
bearing housing, degrease the bearings and housing
prior to greasing.
3501 IOM 11/10 27
5
Fig. 22