Product Manual

Specications Information and Repair Parts Manual
DIAPHRAGM PUMPS
3370-PRV-OE 3 7/2020
Diaphragm Pumps
GEAR BOX OIL (Refer to Figure A,G)
3. Place pump on a level surface. Fill pump gear box (Ref. No. A1) with gear
box oil before the pump is operated. Gear oil must meet requirements of
API GL-5 and military specication MIL-L-2105B. Remove level plug (Ref.
No. G5). Pour gear oil into gear box slowly until oil comes out of ll port.
Warranty on this unit is void unless the gear box is lubricated with
appropriate gear oil listed above. DO NOT OVER FILL!
INSTALLATION
NOTE: In any installation where property damage can occur by pumps not
operating due to power outages, discharge line freezing or any other reason, a
backup system(s) and/or warning system(s) should be used.
1. Place the pump on a level, solid foundation, locating it as close to the
liquid as possible, making the suction line as short and direct as possible.
2. Install pipe nipples (Ref. No. A35) so the smoother side of pipe end faces
the suction and discharge hose.
Maximum discharge head is 25 feet or 10.9 psi. Operation over this head
or pressure will cause pump to stall and/or gearbox damage. Use only
rigid hoses.
3. Attach suction piping to the suction inlet (Ref. No. W2) and discharge
piping to the discharge outlet (Ref. No. W6). The suction line should
be positioned such that there is a continual upward slope from the uid
source to the pump. Avoid using loops or sections of pipe or ttings, which
might permit air to become trapped.
NOTE: If hose is used, be sure to use reinforced hose on both the suction
and discharge. DO NOT USE canvas or similar collapsible materials. NEVER
USE PIPE REDUCER; PIPE SIZE MUST BE EQUAL TO OR LARGER THAN
PUMP PORT SIZE. Suction line must be airtight so that air cannot leak in and
destroy priming vacuum. On a permanent installation where piping is used,
always connect a piece of exible hose between pump and piping so pump is
free to move slightly.
4. It is advisable to use a strainer (Ref. No. A36) on the inlet end of the
suction hose or pipe. A properly sized strainer is supplied with this unit
and should be used at all times to prevent damage. Keep the strainer
clean. If possible, suspend it to keep it from becoming clogged with muck,
roots, debris or leaves. It is best to keep hose free of kinks as they will
restrict ow and add excess loading to pump and gearing.
5. GASOLINE ENGINE UNITS: Follow all instructions in the engine manual
before starting the engine. Fill engine with oil, gasoline, etc.
ELECTRIC MOTOR UNITS: It is strongly recommended that this unit is
plugged into a G.F.I. (Ground Fault Interrupter) circuit. Consult your local
electrician for installation and availability.
6. Input RPM (to pump) – Input RPM must be between 1750 and 2750 RPM.
Final pump speed will be 40 strokes/min. with a 1750 RPM input and 60
strokes/min. with a 2750 RPM input.
Do not exceed 60 strokes per minute with the diaphragm pump.
OPERATION
Operate the diaphragm pump in an upright position only.
1. This diaphragm pump is capable of priming “dry” up to fteen feet; it will
prime much faster when it is lled with clean water through priming cap
(Ref. No. W5). Primed, it can lift to 25 feet.
2. Activate unit following engine or air motor manual or turning unit on if
electrical.
Do not control discharge capacity with a valve or similar device.
CLEARING JAM-UP
If large solids or an accumulation of sand or other sediment becomes lodged
in the pump well (Ref. No. A3) preventing the plunger arm (Ref. No. A2) from
making a full stroke, the pump should be thoroughly cleaned as described
in “If Pump Stalls” shown below. Refer to parts list and illustration for parts
identication.
If pump has stopped or stalled for any unknown reason, clean out pump
cavity thoroughly. Failure to comply with the “caution” could result in
damage to crank (Ref. No. P5/P9), plunger arm (Ref. No. P1) or other parts
of assembly.
1. IF PUMP STALLS:
• Remove four bolts (Ref. No. A8). Seperate pump well from pump
body.
• Clean obstruction and all debris from pump well assembly (Ref. No.
A3).
• Reassemble pump in reverse order of disassembly and return to
service.
2. IF PLUNGER ARM (Ref. No. P1) SEIZES AND GEAR BOX OUTPUT
SHAFT (Ref. No. G8) TURNS IN CRANK (Ref. No. P5):
• Remove guard (Ref. No. A4) by loosening screws (Ref. No. A5).
• Disassemble pump and clean as described in steps above stalled
engine jam up.
• Torque the crank lock screw (Ref. No. P7) to 70 foot pounds with an
appropriate torque wrench (see Figure 3).
Figure 3
• Reassemble the pump in reverse order of disassembly and return
to service.
Pump jamming with an over-torqued lock screw may cause internal
damage. Under torqueing may allow the output shaft to spin and wear
parts necessitating replacement.
MAINTENANCE
Make certain that unit is disconnected from power source before
attempting to service or remove any component.
1. Check gear box oil level every 20 hours of operation or at least once a
week; more often if any leakage is detected around the gear box. Change
gearbox oil after the rst 40 hours of operation. Fill to the oil level plug.
Change gearbox oil every 350 hours of operation.