Thrush 3500 RPM - Manual (Page 8)

THRUSH STANDARD GREASE IS AMERICAN OIL CO, RYCON NO. 2 NLG 1 – 2 OR EQUAL
The THRUSH base mounted end suction pumps are quite large and require a considerable
amount of grease to purge the bearing. It is recommended that the following quantities be used:
No. 1 Power Frame – 2 oz. per bearing on initial startup
No. 2 Power Frame – 4 oz. per bearing on initial startup
The frequency of lubrication is dependent upon the location and environment. In clean, dry
location 1 oz. of grease every 3 months is sufficient. In wet or humid locations the frequency of
lubrication should be doubled.
OIL LUBRICATED bearings are optional on THRUSH base mounted end suction pumps. A fixed
oil level is maintained with the proper frame by an oiler, which allows visual indications of reserve
oil.
On initial installation and before starting a unit that has been shut down for repairs or for any
extended length of time, run enough 10/20 weight motor oil through the oiler to maintain a
constant oil level to insure that the bearing will never be without an oil supply. Oil will have to be
added at intervals to maintain a constant level in the oil cup.
Under working conditions, oil will break down and need to be replaced at regular intervals. The
length of these intervals will depend on many factors. Under normal operation, in clean and dry
locations, the oil should be changed about once a year. However, when the pump is exposed to
dirt contamination, high temperatures (200 Degree F or above) or a wet location, the oil may have
to be changed every 2 or 3 months.
At times it may be necessary to clean the bearings due to accumulated dirt or deteriorated
lubricants. This can be accomplished by flushing the bearing with light oil heated to 180 – 200
Degrees F while rotating it on a spindle. Wipe the bearing housing with a clean rag soaked in
kerosene and flush all surfaces. Dry the bearings completely before re-lubricating. Compressed
air can be used to speed drying, but care should be taken not to let bearings rotate while being
dried.
CAUTION: USE NORMAL FIRE CAUTION PROCEDURES WHEN USING ANY PETROLEUM
CLEANER.
The motor, which drives the THRUSH pump, may or may not require lubrication. Consult the
motor manufacturer’s recommendations for proper maintenance instructions.