Pentair HYPRO 1572-SPX Use and care manual

Series 1572-SPX & 1573-SPX
Gas Engine-Driven, Self-Priming
Centrifugal Pump
Installation, Operation, Repair and Parts Manual
Description
Form L-1474
(12/12)
California Proposition 65 Warning -- This product
and related accessories contain chemicals known to the
State of California to cause cancer, birth defects or other
reproductive harm.
Hypro Self-Priming Centrifugal Pumps handle big, high-
capacity, liquid transfer jobs with ease. Use them for
transferring water, liquid fertilizers, and other chemicals
compatible with pump materials. Make short work of other
farm jobs: filling nurse tanks, watering seedbeds, and
transferring liquids. This self-priming model makes it ideal
for de-watering applications.
1572-SPX
Close-Coupled, Gas Engine-Driven
Self-Priming Centrifugal Pump
Max Flow Rate: ............................. 145 gpm
Max. Pressure: ..................................50 psi
Max. Total Head ............................... 115 ft.
Max. Suction Lift: ................................ 28 ft.
Ports: ........................................ 2” NPT Inlet
2” NPT Outlet
Engine ...................................Honda GX120
1573-SPX
Close-Coupled, Gas Engine-Driven
Self-Priming Centrifugal Pump
Max Flow Rate: .......................... 280 gpm
Max. Pressure: ...............................50 psi
Max. Total Head ............................ 115 ft.
Max Suction Lift: .............................. 28 ft.
Ports: .....................................3” NPT Inlet
3” NPT Outlet
Engine ............................... Honda GX160
WARNING: Do not pump flammable or explosive fluids
such as gasoline, fuel oil, kerosene, etc. Do not use
in explosive atmospheres. The pump should be used
only with liquids that are compatible with the pump
component materials. Failure to follow this warning
can result in personal injury and/or property damage
and will void the product warranty.
1. DO NOT EXCEED recommended speed, pressure and
temperature (140˚ F) for pump and equipment being
used.
2. BEFORE SERVICING, drain all liquids from the system
and flush. Remove the spark plug wire from the spark
plug before servicing the pump or engine.
3. Secure the discharge lines before starting the pump. An
unsecured line may whip, causing personal injury and/
or property damage.
4. Check hose for weak or worn condition before each
use. Make certain that all connections are tight and
secure.
5. Periodically inspect the pump and the system
components. Perform routine maintenance as required
(see Maintenance section).
6. Protect pump from freezing conditions by draining liquid
and pumping a permanent-type automobile antifreeze
containing a rust inhibitor through the system, coating
the pump interior. A 50% mixture with water is
recommended.
7. Do not operate a gasoline engine in an enclosed area.
Be sure the area is well ventilated.
WARNING: Gasoline is a highly combustible fuel. The
improper use, handling, or storage of gasoline can be
dangerous. Never touch or fill a hot engine.
8. Use only pipe, hose and fittings rated for the maximum
psi rating of the pump.
9. Do not use these pumps for pumping water or other
liquids for human or animal consumption.
General Safety Information

2
Preparations before Starting the Engine
1. Fuel: Check fuel level in tank. Do not over fill tank. Use
fresh, clean automotive fuel. Note: DO NOT FILL FUEL
TANK WHEN ENGINE IS RUNNING.
2. Engine Oil: Before checking or refilling with engine oil,
make sure the engine is stopped and placed on a sta-
ble, level surface. Use oil recommended for ambient
air temperatures that the engine will be running at. See
chart below. Change oil according to manufacturer’s
recommendation. (Once after the first 20 hours and ev-
ery 100 hours thereafter.)
Air Temperature Single-grade Oil
85° F #40W
60° F #30W
32° F #20W
3. Priming Water: IMPORTANT: PUMP MUST NOT BE
RUN DRY. On self-priming pumps, only the chamber
needs to be filled with liquid. The pump must not run un-
less the priming chamber is completely filled with liquid
because there is a danger of damaging the mechanical
seal, which depends on the liquid for its lubrication.
Self-priming models can be primed by removing the filler
cap, located at the top of the pump where the discharge
line is mounted to the pump, and filling the priming cham-
ber with liquid. The priming chamber will fill to the level
of the inlet port. After use, the priming chamber should
be flushed and drained to avoid chemical corrosion and
damage from freezing. Drain by removing the lower drain
plug located at the bottom of the casing.
Starting the Pump
IMPORTANT: Before starting engine, be
sure the priming chamber is filled with
liquid and the discharge hose is secure.
1. Turn engine switch located by recoil starter to ON
position.
2. Turn the fuel cock to ON.
3. Push the throttle lever to a slightly open position.
4. Operation of choke lever.
When engine is cold:
In cold weather, start engine with choke in fully
closed position.
In warm weather, start engine with choke in half-
closed position.
When engine is warm:
Start engine with choke in fully open position.
5. Start engine by pulling recoil starter out quickly and
forcefully. Repeat pulling until the engine starts.
Operation of the Pump
1. Idle the engine for 3 to 5 minutes to warm it up.
2. Open the throttle lever to the upper zone after engine
has warmed up.
3. Once the pump has primed, you will note a load on the
engine; adjust rpms to proper speed for your pumping
application.
Hazardous Substance Alert
Please Note: It is illegal to ship or transport any
hazardous chemicals without United States
Environmental Protection Agency Licensing.
1. Always drain and flush pumps before servicing or
disassembling for any reason.
2. Before returning unit for repair, drain out all liquids and
flush unit with neutralizing liquid. Then, drain the pump.
Attach a tag or include a written notice certifying that
this has been done.
3. Never store pumps containing hazardous chemicals.
Plumbing Installation
Preliminary to Mounting
Before setting up the pump for operation, check to see
that the motor and pump turn freely by hand. If it cannot
be turned over by pulling on the recoil starter, open cas-
ing to check for obstructions lodged in pump.
Selecting the Suction Line
To get full capacity of the pump, the suction line should be the
same size as the pump suction port. If suction hose is longer
than approximately 6 feet, use next size larger hose. The suc-
tion line must be free of air leaks. All joints and connections
of the suction line must be tightened securely so that no addi-
tional air may enter the suction side through a loose connec-
tion. Use a good grade of suction hose that will not collapse.
Basket Strainer
The basket strainer supplied with this pump is to be used
when transferring solutions that may contain debris and
solids which could become lodged in the
pump or damage the impeller. Because
of the high flow capacity of this pump,
unknown debris could be siphoned off the
bottom of the tank. Install the strainer on
the suction side of the pump whenever
possible to avoid pump damage.
Operation and Maintenance
L-1474 (12/12)

Operation and Maintenance
Operation and Maintenance (continued)
Always flush pump with water or neutralizing agent
before servicing.
Pump Housing Disassembly
For this pump model, seal replacement requires that the
pump be fully removed from the engine. Observe carefully
the disassembly process, (orientation and order of part
assembly) to ensure an easy assembly process.
1. Pull spark plug wire off spark plug for safety con-
siderations. Remove the four bolts holding the casing
to the casing cover and frame using a 14mm socket
wrench. Tap pump casing on the discharge port with a
rubber hammer, if necessary, to break it loose from the
casing cover. Check inside pump casing. If badly eroded
or damaged, pump casing should be replaced. Remove
O-rings from casing cover and volute.
2. Remove volute and inspect for wear. Replace if eroded.
3. Remove impeller by turning it counter-clockwise using a
(27mm - 1573-SPX / 23mm - 1572-SPX) socket and im-
pact wrench. If an impact wrench is not available, it may
be necessary to hold the crankshaft from turning. To
keep the crankshaft from turning during disassembly,
remove the three bolts holding the recoil starter using
a 10mm socket wrench. Then, using a pipe wrench or
another tool, hold the starter hub and spin the impeller
off. Look for shims that may be present between the
impeller and shaft. This shim is for obtaining the proper
clearance between the impeller and volute. Be careful
not to damage the starter hub while gripping it with the
wrench.
4. Between the impeller and casing cover is the mechanical
seal. On the backside of the impeller is the seal’s
ceramic seat. If either part of the seal is damaged, with
cracked or scuffed surfaces, the seal will fail to perform
satisfactory and will leak. To remove the seal seat from
the impeller, use a small blade screwdriver and wedge
Stopping the Pump
1. Stop pump for a short time:
Run engine throttled all the way down (fully to the right).
Turn engine switch to OFF position.
2. Stopping pump for storage:
Turn fuel cock to OFF position instead of turning the
engine switch off.
Let the engine idle for 2 to 3 minutes until fuel in
carburetor is depleted and engine stops. If a valve is
installed on the discharge hose, you may run pump
with valve closed during this procedure.
Note: Pump must not be run dry. Make sure there
is water in the priming chamber.
Storage
1. Drain pump. Flush Pump after Use.
One of the most common causes for faulty pump perfor-
mance is gumming or corrosion inside the pump. Flush
the pump and entire system with a solution that will
chemically neutralize the liquid pumped. Mix according
to the manufacturer’s directions. This will dissolve most
residues remaining in the pump, leaving the inside of
the pump clean and ready for use.
To Prevent Corrosion:
After cleaning the pump as directed above, flush it with
permanent-type automotive antifreeze (Prestone, Zer-
ex, etc.) containing a rust inhibitor. Use a 50% solution;
half antifreeze and half water. Plug ports to keep out air
during storage. For short periods of idleness, noncor-
rosive liquids may be left in the pump, BUT AIR MUST
BE KEPT OUT. Plug the ports or seal port connections.
2. Drain all the fuel from the fuel tank, fuel lines, and filter.
3. Store pump in a clean, dry environment.
3
Repair Instructions
L-1474 (12/12)

4
the seal seat out and discard. To remove the mechanical
seal, it is necessary to first remove the casing cover by
removing the four bolts holding it to the engine, using
13mm socket wrench. Note that these bolts have seal
washers on them and must not be damaged. From the
backside of the casing cover, press the mechanical seal
out and discard it.
Clean-up of Pump Housing
If necessary, clean the pump casing, volute, and casing
cover using a solvent to remove debris and corrosion
particles. Use a wire brush to further remove buildup of
debris if it doesn’t soak loose.
Seal Replacement and
Pump Housing Assembly
1. Apply a light bead of RTV sealant to the top edge of the
seal cavity on the casing cover.
2. Insert the stationary portion of the new mechanical seal
by carefully pushing only on the outer metal ring as you
press it into the casing cover. Use a tool with 1 1/2” ID,
such as a 1 1/2” PVC pipe, 4” long, that fits over the
carbon face of the seal, but pushes only on the metal ring
to insert the seal. Be careful to avoid scratching the seal’s
carbon surface.
3. Bolt casing cover on engine. Note the arrow and word UP
to indicate orientation of the casing cover. Use bolts with
washers on them. Install o-ring on casing cover; replace
with a new o-ring if necessary.
4. Lubricate the seal cavity of the impeller with WD-40,
LPS, or equivalent, and carefully press the seal’s
mating ceramic ring in place, seating it squarely on the
bottom of the cavity. IMPORTANT: MAKE SURE BOTH
OF THE SEAL’S SURFACES ARE CLEAN AND
LUBRICATED. NEVER RUN THE SEAL SURFACES
DRY.
5. Place the impeller on the shaft and spin it clockwise to
tighten it on the shaft. Secure the impeller using a socket
and wrench (see step 3 in Disassembly Instructions for
socket size).
6. It is now necessary to check the clearance between
the impeller and volute. As shown in the sketch below,
measure the inside depth of the volute case (distance
A). Then measure the distance from the casing cover to
the front edge of the impeller (distance B). The difference
between the two measurements should be between 0.024
and 0.036” or about 1/32” clearance. If the value is out
ofrange,removetheimpellerandadjustbyaddingorremoving
brass shims to achieve the correct amount of clearance.
7. Place a new o-ring in the groove of the volute’s inlet if nec-
essary. Place the volute in place with the notch pointing
up so that it mates with the casing cover at the inlet port.
It may be necessary to tip the engine on its side for this
assembly.
8. Carefully set casing over volute and bolt casing onto cas-
ing cover and frame. It may be necessary to tip the engine
on its side for this assembly.
9. Once assembly is complete, pull on engine recoil starter
with engine switch in OFF position to verify that the impel-
ler rotates smoothly without catching. Connect spark plug
wire. Assembly and inspection is now complete.
Repair Instructions (continued)
Repair Instructions
A
B
Casing
Cover
Impeller
Volute
(A) – (B) = within 0.024 - 0.036 inches.
L-1474 (12/12)

Symptom Probable Cause(s) Corrective Action(s)
No discharge Pump not priming Discharge line must be open for priming to
occur. If valve is installed, check that it is open.
Pump not priming Fill priming chamber with water.
Pump not priming Increase engine speed.
Low discharge Air leaks in suction line Check inlet fittings for leaks. Seal leaks.
Undersized or collapsed suction hose Suction inlet hose should be same diameter
as inlet port fitting. Check hose for kinks.
Blocked or clogged inlet Inspect basket strainer and clear any debris
from screen.
Impeller plugged Inspect and clear obstruction.
Fluid leaking from pump Mechanical seal failure Determine fluid is coming from weep holes
between pump and engine. Change out seal.
Crack in pump housing Check casing and casing cover for damage.
Engine doesn’t run Check oil & gas Refer to engine manual for trouble shooting
problem.
0 PSI 5 PSI 10 PSI 15 PSI 20 PSI 25 PSI 30 PSI 35 PSI 40 PSI 45 PSI 50 PSI
GPM GPM GPM GPM GPM GPM GPM GPM GPM GPM GPM
145 141 133 125 114 102 87 70 51 24 0
Model 1572-SPX
0 PSI 5 PSI 10 PSI 15 PSI 20 PSI 25 PSI 30 PSI 35 PSI 40 PSI 45 PSI 50 PSI
GPM GPM GPM GPM GPM GPM GPM GPM GPM GPM GPM
280 268 255 233 211 181 149 115 77 46 0
Model 1573-SPX
Performance Data is based on testing with water. Performance will vary with fluid density and/or viscosity.
5
Performance Data
Troubleshooting
Model 1572-SPX Model 1573-SPX
L-1474 (12/12)

6
Model 1572-SPX
Ref. Qty.
No. Req’d. Part No. Description
1 ENGINE HONDA GX120
1 1 DS-501-001 Casing
2 1 DS-501-004 Casing Cover
3 1 DS-501-009 Impeller
4 1 DS-501-011 Inner Casing
5 1 DS-501-019HN Discharge Port
6 1 DS-501-013N Inlet Port
7 1 2120-0036 Mechanical Seal (Viton)
8 1 DS-501-002 O-Ring
9 1 DS-501-012 Gasket
10 1 DS-501-020 Gasket
11 1 DS-501-015 Check Valve
12 2 DS-501-021 Plug and O-Ring #13
Ref. Qty.
No. Req’d. Part No. Description
13 2 Not Available O-Ring
14 4 DS-501-005 Bolt M8X50
15 4 DS-501-007 Spring Washer (8mm)
16 4 DS-501-008 Flat Washer (8mm)
17 4 DS-501-006 Gasket
18 1 Not Available Frame (Black)
19 4 DS-501-003 Bolt M10X30SW
20 4 DS-501-014 Bolt M8X25SW
21 3 DS-801-014 Bolt M8X30SW
22 4 Not Available Bolt M8X40SW
23 4 Not Available Lock Nut (M8)
24 1 Not Available Strainer
20
15
17
6
11
12
13
9
4
3
7
8
2
23
22
24
18
19
1
16
14
21
10
12
13
5
L-1474 (12/12)

Model 1573-SPX
Ref. Qty.
No. Req’d. Part No. Description
1 ENGINE HONDA GX160
1 1 DS-801-001 Casing
2 1 DS-501-004 Casing Cover
3 1 DS-801-009 Impeller
4 1 DS-801-011 Inner Casing
5 1 DS-801-019N Discharge Port
6 1 DS-801-013N Inlet Port
7 1 2120-0036 Mechanical Seal (Viton)
8 1 DS-501-002 O-Ring
9 1 DS-801-012 Gasket
10 1 DS-801-020 Gasket
11 1 DS-801-015 Check Valve
12 2 DS-501-021 Plug and O-Ring #13
Ref. Qty.
No. Req’d. Part No. Description
13 2 Not Available O-Ring
14 4 DS-501-005 Bolt M8X48
15 4 DS-501-007 Spring Washer (8mm)
16 4 DS-501-008 Flat Washer (8mm)
17 4 DS-501-006 Gasket
18 1 DS-801-030N-2 Frame (Black)
19 4 DS-501-003 Bolt M10X30SW
20 4 DS-501-014 Bolt M8X25SW
21 3 DS-801-014 Bolt M8X30SW
22 4 Not Available Bolt M8X40SW
23 4 Not Available Lock Nut (M8)
24 1 DS-801-029 Strainer
7
14
16
17
15
20
13
12
5
10
21
11
13
19
1
4
3
7
8
2
9
6
18
23
22
24
12
L-1474 (12/12)

Limited Warranty on Hypro/SHURflo Agricultural Pumps & Accessories
Hypro/SHURflo (hereafter, “Hypro”) agricultural products are warranted to be free of defects in material and workmanship under
normal use for the time periods listed below, with proof of purchase.
- Pumps: one (1) year from the date of manufacture, or one (1) year of use. This limited warranty will not
exceed two (2) years, in any event.
- Accessories: ninety (90) days of use.
This limited warranty will not apply to products that were improperly installed, misapplied, damaged, altered, or incompatible with
fluids or components not manufactured by Hypro. All warranty considerations are governed by Hypro’s written return policy.
Hypro’s obligation under this limited warranty policy is limited to the repair or replacement of the product. All returns will be tested
per Hypro’s factory criteria. Products found not defective (under the terms of this limited warranty) are subject to charges paid by the return-
ee for the testing and packaging of “tested good” non-warranty returns.
No credit or labor allowances will be given for products returned as defective. Warranty replacement will be shipped on a freight allowed
basis. Hypro reserves the right to choose the method of transportation.
This limited warranty is in lieu of all other warranties, expressed or implied, and no other person is authorized to give any other
warranty or assume obligation or liability on Hypro’s behalf. Hypro shall not be liable for any labor, damage or other expense, nor
shall Hypro be liable for any indirect, incidental or consequential damages of any kind incurred by the reason of the use or sale of
any defective product. This limited warranty covers agricultural products distributed within the United States of America. Other world market
areas should consult with the actual distributor for any deviation from this document.
Return Procedures
All products must be flushed of any chemical (ref. OSHA section 1910.1200 (d) (e) (f) (g) (h)) and hazardous chemicals must be labeled/
tagged before being shipped* to Hypro for service or warranty consideration. Hypro reserves the right to request a Material Safety Data
Sheet from the returnee for any pump/product it deems necessary. Hypro reserves the right to “disposition as scrap” products returned
which contain unknown fluids. Hypro reserves the right to charge the returnee for any and all costs incurred for chemical testing, and proper
disposal of components containing unknown fluids. Hypro requests this in order to protect the environment and personnel from the hazards
of handling unknown fluids.
Be prepared to give Hypro full details of the problem, including the model number, date of purchase, and from whom you purchased your
product. Hypro may request additional information, and may require a sketch to illustrate the problem.
Contact Hypro Service Department at 800-468-3428 to receive a Return Merchandise Authorization number (RMA#).
Returns are to be shipped with the RMA number clearly marked on the outside of the package. Hypro shall not be liable for freight damage
incurred during shipping. Please package all returns carefully. All products returned for warranty work should be sent shipping charges
prepaid to:
HYPRO
Attention: Service Department
375 Fifth Avenue NW
New Brighton, MN 55112
For technical or application assistance, call the Hypro Technical/Application number: 800-445-8360. To obtain service or warranty
assistance, call the Hypro Service and Warranty number: 800-468-3428; or send a fax to the Hypro Service and Warranty FAX:
651-766-6618.
*Carriers, including U.S.P.S., airlines, UPS, ground freight, etc., require specific identification of any hazardous material being shipped. Failure to do so may
result in a substantial fine and/or prison term. Check with your shipping company for specific instructions.
375 Fifth Avenue NW •New Brighton, MN 55112
Phone: [phone] •800-424-9776 •Fax: [phone]
www.hypropumps.com
2012 Hypro
Printed in USA