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BRP750DP3 Rev A | 3/2020
Specifications Information and Repair Parts Manual
BRP750DP3
Diaphragm Pumps
General Safety Information (All Units)
1.
Know the pump application, limitations and potential hazards.
Do not use to pump flammable or explosive fluids such as
gasoline, fuel oil, or kerosene, etc. Do not use in flammable and/or
explosive atmospheres. Pump should only be used with liquids
compatible with pump component materials. Failure to follow this
warning can result in personal injury and/or property damage.
2.
Provide adequate protection and guarding around moving
parts.
3.
Release all pressure within the system before servicing any
component.
4.
Drain all liquids from the system before servicing.
5.
Secure the discharge line before starting the pump. An
unsecured discharge line will whip, possibly causing personal
injury and/or property damage.
6.
Check hoses for weak or worn condition before each use,
making certain that all connections are secure.
7.
Periodically inspect pump and system components. Perform
routine maintenance as required (see Maintenance Section).
8.
Provide a means of pressure relief for pumps whose
discharge line can be shut off or obstructed.
9.
Personal Safety:
a. Wear safety glasses at all times when working with
pumps.
b. Wear a face shield and proper apparel when
pumping hazardous chemicals.
c. Keep work area clean, uncluttered and properly
lighted.
d. Keep visitors at a safe distance from the work area.
.
ASSEMBLY
HANDLE ON 3" PUMP
(Refer to Figure A)
a. Remove two bolts from front holes in gear box,
mounting feet base (Ref. No. A6).
b. Place handle 3354-116-90 on top and reinstall bolts
and washers.
c. Reinstall two hex bolts and washer assemblies,
then tighten.
2.
ROTATING SUCTION/DISCHARGE PORTS (OPTIONAL)
(Refer to Figure A,W,P)
In some applications, it may be preferable to have suction/discharge
ports rotated 90 degrees to be in line with driver. If so, proceed as
follows:
a. Remove four hex cap screws (Ref. No. A9), hex nut (Ref. No.
A13) and washers (Ref. Nos. A11 & A12) from pump
assembly to separate pump well (Ref. No. A3) from pump
base (Ref. No. A8).
b. Rotate pump well 90 degrees clockwise so that driver is
positioned over top of discharge plate (Ref. No. W7).
c. Be sure that pump well base and diaphragm (Ref. No. P17)
are aligned properly with one another. Then, reinstall four hex
cap screws, hex nuts and washer assemblies and tighten.
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
specification MIL-L-2105B. Remove gear box housing fill plug
(Ref. No. G6). Remove level plug (Ref. No. G5). Pour gear oil
into gear box slowly until oil comes out of level plug.
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. A36) 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. W7). The
suction line should be positioned such that there is a
continual upward slope from the fluid source to the pump.
Avoid using loops or sections of pipe or fittings, 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 flexible hose between pump and piping so pump is free to
move slightly.
4.
It is advisable to use a strainer (Ref. No. W16) 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 flow 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.
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
fifteen feet; it will prime much faster when it is filled with
clean water through priming cap (Ref. No. W6). Primed, it
can lift to 25 feet.
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 identification.
