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7
SECTION F: SERVICE AND REPAIR
NOTE:
All item numbers in ( ) refer to Figures 8 & 9.
F-1) Lubrication:
Anytime the pump is removed from operation the cooling oil in
the motor housing (2) must be checked visually for oil level and
contamination.
F-1.1) Checking Oil:
Motor Housing - To check oil, set unit upright. Remove cap
screws (6) and lockwashers (4), lift cord grip plate (10j) from
motor housing (2) but DO NOT disconnect from motor leads.
With a fl ashlight, visually inspect the oil in the motor housing
(2) to make sure it is clean, clear and that oil level is above all
internal componentry.
F-1.2) Testing Oil:
1. Place pump on it’s side, remove cap screws (6) and
lockwashers (4), lift cord grip plate (10j) from motor
housing (2) and drain oil into a clean, dry container.
2. Check oil for contamination using an oil tester with a
range to 30 Kilovolts breakdown.
3. If oil is found to be clean and uncontaminated (measure
above 15 KV. breakdown), refi ll the motor housing as per
section F-1.3.
4. If oil is found to be dirty or contaminated (or measures
below 15 KV. breakdown), the the pump must be carefully
inspected for leaks at the shaft seal (46), cord grip plate
(10j), O-rings (11) and (42) pipe plug (5) before refi lling
with oil. To locate the leak, perform a pressure test as per
section F-1.4. After leak is repaired, refi ll with new oil as
per section F-1.3.
F-1.3) Replacing Oil:
Motor Housing - Drain all oil from motor housing and dispose
of properly. Refi ll with (see parts list for amount) new cooling oil
as per Table 1. An air space must remain in the top of the motor
housing to compensate for oil expansion (See Figure 8). Set
unit upright and fi ll only until the motor, as viewed through the
conduit box opening, is just covered and no more.
Reassemble the O-ring (11), cord grip plate (10j), cap screws
(6) and lockwashers (4), apply thread locking compound to
each cap screw (6) thread before installing. Torque cap screws
(6) to 15 ft., lbs.
TABLE 1 - COOLING OIL - Dielectric
SUPPLIER GRADE
BP Enerpar SE100
Conoco Pale Paraffi n 22
Mobile D.T.E. Oil Light
G & G Oil Circulating 22
Imperial Oil Voltesso-35
Shell Canada Transformer-10
Texaco Diala-Oil-AX
Woco Premium 100
WARNING ! - DO NOT overfi ll oil . Overfi lling of
motor housing with oil can create excessive and
dangerous hydraulic pressure which can destroy
the pump and create a hazard. Overfi lling oil voids
warranty.
F-1.4) Pressure Test:
Motor Housing - Before checking the pump for leaks around
the shaft seal, o-rings, and cord inlet, the oil level should be
full as described in section F-1.3. Remove pipe plug (5) and
lifting handle (7) from motor housing (2). Apply pipe sealant
to pressure gauge assembly and tighten into pipe plug hole
(see Figure 2). Pressurize motor housing to 10 P.S.I. Use a
soap solution around the sealed areas and inspect joints for
“air bubbles”. If, after fi ve minutes, the pressure is still holding
constant, and no “bubbles” are observed, slowly bleed the
pressure and remove the gauge assembly. Replace the pipe
plug using a sealant. If the pressure does not hold, then the
leak must be located.
CAUTION ! - Pressure builds up extremely fast, in-
crease pressure by “tapping” air nozzle. Too much
pressure will damage seal. DO NOT exceed 10 P.S.I.
in motor housing
F-2) Impeller and Volute Service:
F-2.1) Disassembly and Inspection:
To clean out volute (26), disconnect power, remove hex
nuts (20) and lockwashers (19), vertically lift motor and seal
assembly from volute (26). Clean out body if necessary. Clean
and examine impeller (28) for pitting or wear, replace if required.
Inspect square ring (42) and replace if cut or damaged. If
impeller (28) requires replacing, remove jam nut (34) and
washer (35), by placing a fl at screwdriver in the slot of the
end of the shaft to hold the shaft stationary while unscrewing
the impeller (28). Once impeller (28) is removed, remove pull
washer (16) and exclusion seal (17) if damaged or cut.
F-2.2) Reassembly:
Position exclusion seal (17) on shaft until it seats against the
stationary portion of seal (46). Place pull washer (16) on shaft
until it seats against exclusion seal (17). To install impeller (28),
clean the threads with loctite cleaner and screw impeller (28)
onto the shaft hand tight. Apply thread locking compound to
shaft threads and install washer (35) and jam nut (34). Torque
to 40 ft. lbs. Rotate impeller to check for binding.
FIGURE 2
ç 10 PSI
AIR
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