Operation
NOTICE: If the overload protector stops the pump repeatedly, disconnect the
power from the pump and check it to find the problem. Low voltage, long
extension cords, clogged impeller, too much back pressure in the discharge
hose (as when pumping through 50' (15 M) of coiled hose), or running pump
with no load, can all cause excessive cycling and overheating.
5. For Model 540086, the water being pumped cools the motor, allowing the
pump to run continuously at any depth of water above 3/16". However, if the
motor overload stops the pump, allow it to cool for one hour before restarting.
Motor will not restart before the overload has cooled.
Orient Part Number with
Anti-Airlock Hole as shown
Tighten 1st
3rd
Install shield and tighten screws in
sequence as shown.
Troubleshooting
SYMPTOM
POSSIBLE CAUSE(S)
Pump won't
Blown fuse
start or run
Low line voltage
Defective motor
Impeller
Pump operates but
Low line voltage
delivers little or
no water
Something caught in impeller
Small diameter garden hose
or long discharge line
Check valve installed without
vent hole
Air lock
Coils or bends in hose
For parts or assistance, call MasterPlumber Customer Service at
Anti-Airlock
Hole
2nd
5124 0905
Key
Part Description
1
Screen
2
Shield
3
Impeller
4
Motor
5
Power Cord
•
Garden Hose Adapter
** If motor fails, replace entire pump.
• Not Illustrated.
CORRECTIVE ACTION
If blown, replace with fuse of proper size.
If voltage under recommended minimum, check size of wiring
from main switch on property. If OK, contact power company.
Replace pump.
If impeller won't turn, remove screen. Locate source of binding.
Use only 14 gauge or larger extension cords. Use short extension cords
when necessary.
Clean out impeller.
Use larger diameter garden hose or 1" flexible pipe. Eliminate any
excess hose. Short hoses work best.
Drill a 1/16" - 1/8" (1.6 - 3.2 mm) dia. hole between pump
discharge & check valve.
Turn off pump for a few seconds, clean out anti-airlock hole and restart pump.
Straighten hose.
Airlocks
When a pump airlocks, it runs but does not move any water. An airlock will cause
the pump to overheat and fail. This pump has an anti-airlock hole in the bottom
of the pump body. If you suspect an airlock, unplug the pump, clean out the anti-
airlock hole with a paper clip or piece of wire, and restart the pump.
IMPORTANT: This hole allows the pump to start priming within 15 seconds in as
little as 1/2" of water. NEVER restart pump in less than 1/2" of water. Leakage from
the anti-airlock hole is normal.
Anti-Airlock
Hole
5125 0905
Qty.
Part No.
1
PS8-5P
1
PS70-3P
1
PS5-24P
1
**
1
PS117-54-TSU
1
FT0013-43
3
Model
540086
5
5
4
4
3
3
2
2
1
1
800-628-9439