4
SECTION: SERVICE AND REPAIR
1) Lubrication:
Anytime the pump is removed from operation, the cooling oil
in the motor housing should be checked visually for oil level
and contamination.
1.1) Checking Oil:
Motor Housing -
To check oil, set unit upright. Remove pipe
plug from motor housing. With a fl ashlight, visually inspect the
oil in the motor housing to make sure it is clean and clear,
light amber in color and free from suspended particles. Milky
white oil indicates the presence of water. Oil level should be
just above the motor when pump is in vertical position.
1.2) Testing Oil:
1.)
Place pump on it’s side, remove pipe plug, from
motor housing 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
(measuring above 15 KV. breakdown), refi ll the motor
housing as per paragraph 1.4.
4.)
If oil is found to be dirty or contaminated (or measures
below 15 KV. breakdown), the pump must be
carefully inspected for leaks at the shaft seal, cord
assemblies, square ring and pipe plug, before refi lling
with oil. To locate the leak, perform a pressure test as per
paragraph 1.3. After leak is repaired, dispose of old oil
properly, and refi ll with new oil as per paragraph 1.4.
1.3) Pressure Test:
Pumps that have been disassembled, Motor Housing -
If
the pump has been disassembled, the oil should be drained
before a pressure test, as described in paragraph 1.2.
Remove pipe plug from motor housing. Apply pipe sealant to
pressure gauge assembly and tighten into hole (See Figure
1). Pressurize motor housing to 10 P.S.I. Use 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 oil as described in
section 1.4. If the pressure does not hold, then the leak must
be located and repaired.
Pumps that have NOT been disassembled, Motor Housing-
The pressure test may be done with the oil at its normal level.
Remove pipe plug from motor housing. Apply pipe sealant to
pressure gauge assembly and tighten into hole (See Figure
1). Pressurize motor housing to 10 P.S.I. Use soap solution
around the sealed areas above the oil level and inspect joints
for “air bubbles”.
For sealed areas below the oil level, leaks will seep oil. If, after
fi ve minutes, the pressure is still holding constant, and no
“bubbles”/oil seepage is observed, slowly bleed the pressure
and remove the gauge assembly. If the pressure does not hold,
then the leak must be located and repaired.
CAUTION ! Pressure builds up extremely
fast, increase pressure by “tapping” air
nozzle. Too much pressure will damage
seal. DO NOT exceed 10 P.S.I.
1.4) Replacing Oil:
Motor Housing-
Set unit upright and refi ll with new cooling oil
as per Table 1. Fill to just above motor as an air space must
remain in the top of the motor housing to compensate for oil
expansion. Apply pipe thread compound to threads of pipe
plug then assemble to motor housing.
Important ! - For single phase units, oil level
should be below capacitor
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.
REMOVE HANDLE
REMOVE PIPE
PLUG
PRESSURE GAUGE
ASSEMBLY
ç
10 PSI
AIR
FIGURE 1
