Carver Pump GH - LUBRICATION OF PUMP BEARINGS

I-120
GH Pump 120 – 16.02.EN
17
X. MAINTENANCE.
Generally the pump does not need continuous
supervision. The pump should always run quietly and
smoothly, without vibration. Regular checks of the pump
running noises will prevent the risk of excessive
temperatures as a result of bearings running hot or
defective bearing seals. To ensure such operation, the
following maintenance schedule should be applied at
regular intervals during operation of the pump.
Occasional visual checks are recommended. Data
should be recorded periodically for each pump to keep
track of maintenance which has been performed and to
note operational problems. A sample maintenance
record sheet is provided for this purpose at the front of
this manual.
NOTE
Regular inspection and service are essential for
safe operation of the pump. Any auxiliary
systems installed must be monitored, if
necessary, to make sure they function
correctly.
Parts marked with * are options or vary by
pump.
Daily Inspection:
 Visually inspect unit.
 Check bearing temperatures.
 Check for leakage at mechanical seal.
Weekly Inspection:
 Check power (amps) readings.
 Check pump discharge pressure.
 Check vibration on pump and driver bearings.
Vibration should NOT exceed 1.5 of overall
displacement (unfiltered) peak to peak mils
(0.001”) at 3600 RPM and 3.0 of overall
displacement (unfiltered) peak to peak mils
(0.001”) at 1750 RPM.
Monthly Inspection:
 Check foundation bolts.
Semi-annual Inspection:
 Grease bearings. DO NOT OVER GREASE.
 If stand-by pumps are installed, it is advisable to
operate pumps on a rotational system to give
each pump a periodic duty. This ensures that
stand-by pumps will have periodic operation and
always be in good condition for instant start-up.
12,500 Hours - Overhaul
 For pump overhaul, complete Section XI, Service
and Repair.
A. LUBRICATION OF PUMP BEARINGS.
Ball Bearing (16 and 18). The pump ball bearings (16
and 18) are grease lubricated.
Grease, lubrication frequency depends on operating
conditions. Normal duty calls for lubrication after 1,000
hours and every 10,000 hours afterwards. Ball bearings
is lubricated at Carver Pump Company with Amoco
Rykon Premium Grease No. 2EP or equivalent, non-
soap, polyurea thickened grease with a drop point of
450 degrees F. This grease was selected because of its
suitability for extreme pressures and its high
temperature stability. Never mix greases with differing
properties.
Polyurea based greases are NOT compatible with
lithium or soda soap based greases. Therefore, the type
of grease added should not vary. However, if it is
necessary to change grease types, the bearing cap (11)
should be thoroughly cleaned and flushed with suitable
solvent to remove all traces of old grease. Disassemble
pump according to Section VII, Paragraph B, remove
shaft and ball bearings (16 and 18) from bearing frame
(19) and follow these procedures:
NOTE
It is recommended that when ball bearings are
removed from the shaft, the ball bearing should
be replaced. If the ball bearing is in good
condition and must be reused, follow the
procedures below.
1. Place ball bearing (16 and/or 18), bearing frame
(19), and bearing cap (35) in a wire or mesh
basket and suspend the basket in a light mineral
solvent. Allow it to soak, preferably overnight.
2. After soaking and cleaning the ball bearing (16
and/or 18), bearing frame (18) and bearing cap
(35) should be rinsed in a clean, light mineral
solvent and agitated vigorously to remove all
loosened hard grease and dirt.
3. Dip ball bearing (16 and/or 18) in clean, light oil
and spin by hand to determine that all foreign
matter has been removed.
4. After cleaning, repack ball bearing (16 and/or
18) half full on both sides with a good quality
bearing grease.
5. Proceed with reassembly of pump according to
Section VII, Paragraph E.