1900 Series Horizontal Splitcase Pumps
Instruction and Repair Manual
22
11/12/18
REPAIR:
NOTE:
This repair manual is applicable to pump Models 1920, 1920F, 1910 and 1940. All photos illustrate Model 1910 except where
noted.
SERVICE:
Your Fairbanks Nijhuis™ pump requires no maintenance other than periodic inspection, lubrication and occasional
cleaning. The intent of inspection is to prevent breakdown, thus obtaining optimum service life.
LUBRICATION OF BEARINGS:
Regreasable bearings will require periodic lubrication and this can be accomplished by using the zerk or lubrication fitting
at each bearing. Lubricate the bearings at regular intervals using high quality grease. The initial bearing lubrication at
Aurora is Chevron SRI Grease NLGI 2 (polyurea thickener) (Pentair Part Number 384-0002-639). Before lubricating the
bearings, thoroughly flushing the old grease with the new grease is required. We recommend Chevron SRI Grease NLGI
2 (polyurea thickener) for follow-up relubrication after the flushing. Most major brands of Grade No. 2 ball bearing grease
are satisfactory for pump operation in both wet and dry applications.
CAUTION:
Be aware that mixing of different brands or blends of grease should be avoided due to possible incompatibilities that
could damage the bearings. A thorough flushing of the old grease with the new grease is required to minimize this
potential incompatibility. Avoid using the following: (1) grease of vegetable or animal base that can develop acids or (2)
grease containing rosin, graphite, talc or other impurities. Under no circumstances should grease be reused.
CAUTION:
Over lubrication should be avoided as it may result in overheating and possible bearing failure. Under normal application,
adequate lubrication is assured if the amount of grease is maintained at 1/3 to 1/2 the capacity of the bearing and
adjacent space surrounding the bearing.
In dry locations, each bearing will need lubrication at least every 4,000 hours of running time or every 6 to 12 months,
whichever is more frequent. In wet locations the bearings will need lubrication at least after every 2,000 hours of running
time or every 4 to 6 months, whichever is more frequent. A unit is considered to be installed in a wet location if the pump
and motor are exposed to dripping water, to the weather, or to heavy condensation such as found in unheated and poorly
ventilated underground locations.
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 a light oil heated to 180 to
200°F while rotating it on a spindle. Wipe the
bearing housing with a clean rag soaked in a cleaning solvent and flush
all surfaces.
Dry bearing thoroughly before relubricating. 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.
Model 1920 pumps are available with two options for lubricating the
shaft bearings. They are:
1. Regreasable (standard)
2. Oil lubrication
A. Complete pump assemblies.
Model 1910
Model 1940
Models 1920
and 1920F