Pre-Operation
1. Check Voltage and Phase compare to the voltage and
phase information stamped on the pump name plate.
2. Check Pump Rotation - Improper motor rotation can
result in poor pump performance and can damage
the motor and/or pump. Check rotation by momen-
tarily applying power and observe the "kickback".
Kickback should always be in a counter-clockwise
direction as viewed from motor end or opposite to
impeller rotation. Incorrect rotation for Single-Phase
pumps is unlikely. If the rotation is incorrect contact
factory.
3. Name Plate - Record the information from the pump
name plate for future reference.
4. Pump-Down Test - Be sure pump has been plugged in,
lowered into the basin or sump, check the system by
filling with liquid and allowing the pump to operate
through its pumping cycle. The time needed to
empty the system, or pump-down time along with the
volume of water, should be recorded.
Maintenance
Minimal maintenance is required. Perform the following
checks when pump is removed from operation or when
pump performance deteriorates:
a). Inspect motor chambers for oil level and
contamination.
b). Inspect impeller and body for excessive build-up or
clogging.
c). Inspect motor and bearings.
d). Inspect seal for wear or leakage.
e). Inspect cutters for wear
Servicing
NOTE: Item numbers in ( ) refer to part numbers shown
on page 15.
Cooling Oil - Anytime the pump is removed from
operation, the cooling oil in the motor housing and seal
housing should be checked visually for oil level and
contamination. To check oil, set unit upright. Remove
oil plug (26) from housing (21). With a flashlight, visually
inspect the oil in the housing (21) 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.
Oil Testing
• Drain oil into a clean, dry container by placing pump on
it's side. Remove oil plug (26), from housing (21).
• Check oil for contamination using an oil tester with a
range to 30 Kilovolts breakdown.
• If oil is found to be clean and uncontaminated
(measuring above 15 KV. breakdown), refill the housing.
Grinder Pumps
Models: AGP300, AGP500 & AGP750
Installation and Service
Motor Housing Pressure Test:
If oil has been drained, fill to normal level before per-
forming pressure test (See Figure 5 and 6). Remove pipe
plug (26) from motor housing (21).
7
FIGURE 5
FIGURE 6