Pentair HYPRO HM1C User manual

375 Fifth Avenue NW •New Brighton, MN 55112-3288 •[phone] •Fax [phone]
www.hypropumps.com
Product Bulletin
__________________________________________________________________________
Date: November-2009
Update to the hydraulic motor tank ports for HM1C, HM2C, HM3C, HM4C & HM5C Motors
Date: November, 2009
To: Hypro hydraulic driven centrifugal and hydraulic driven plunger pump customers
The hydraulic driven centrifugal pump and hydraulic driven plunger pump lines from Hypro have
long been a top performer in the field. As part of our commitment to quality and continuous
improvement, Hypro is providing notification of upcoming changes and recommendations to our
standard hydraulic motor line tank port and return line. This change will not affect product cost
and will be implemented across the standard Hypro hydraulic motor line on product
manufactured beginning January 1, 2010.
Update: Change from ½” NPT outlet tank port adaptors to ¾” NPT outlet tank port adaptors
Benefits: Provides a visual identification of pressure and tank ports reducing the likelihood
of reverse hook-up
Update: Tanks return line recommendation changes from ½” return hose to ¾” return hose
Benefits: Reduces internal motor pressures resulting in increased performance, reduced
seal pressures, and increased motor life.
Old Style Motor: New Style Motor:
½” NPT Tank Outlet Adaptor ¾” NPT Tank Outlet Adaptor
½” NPT ¾” NPT
Please contact your field sales representative with any questions.
Regards,
Jared Krueger
Product Manager
Hypro
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Installation, Operation, Repair and Parts Manual
1/10
Description
Hypro centrifugal pumps are designed for agricultural and
industrial spraying and transfer of a variety of fluids: water,
insecticides, herbicides, wettable powders, emulsives, liquid
fertilizers, etc. Polypropylene centrifugal pumps may also be
used to pump acid fertilizer, calcium chloride and other highly
corrosive liquids such as sulfuric and phosphoric acids.
Hypro Series 9300 hydraulic motor-driven centrifugal pumps
provide smooth performance. They can be conveniently
mounted on the tractor or sprayer, becoming part of the
vehicle’s hydraulic system and freeing the PTO for other
uses. The Hypro “close-coupled” design reduces the
mounting space required, eliminating long shafts and
couplers between the pump and motor.
Form L-1526
Series 9300 Hydraulically-Driven
Centrifugal Pumps
SERIES 9302C & 9302S
Cast Iron & Stainless Steel
Centrifugal Pumps
SERIES 9303P
Polypropylene
Centrifugal Pumps
Max. Flow Rate: ..............113 gpm
Max. Pressure: ..................125 psi
Ports: ....................1-1/2" NPT Inlet
............................1-1/4" NPT Outlet
Hydraulic Ports: ....1/2" NPT Inlet
................................1/2" NPT Tank
Max. Flow Rate: ..............100 gpm
Max. Pressure: ..................120 psi
Ports: ....................1-1/4" NPT Inlet
..................................1" NPT Outlet
Hydraulic Ports: ......1/2" NPT Inlet
................................1/2" NPT Tank
Cast Iron Centrifugal Pumps
Max. Flow Rate: ..............190 gpm
Max. Pressure: ..................130 psi
Ports: ..........................2" NPT Inlet
............................1-1/2" NPT Outlet
Hydraulic Ports: ....1/2" NPT Inlet
................................1/2" NPT Tank
SERIES 9304C
SERIES 9303C-SP
Cast Iron Centrifugal Pumps
Max. Flow Rate: ..............122 gpm
Max. Pressure: ..................140 psi
Ports: ....................1-1/2" NPT Inlet
............................1-1/4" NPT Outlet
Hydraulic Ports: ......1/2" NPT Inlet
................................1/2" NPT Tank
SERIES 9305C-HM3C
Cast Iron Centrifugal Pumps
Max. Flow Rate: ..............190 gpm
Max. Pressure: ..................180 psi
Ports: ..........................2" NPT Inlet
............................1-1/2" NPT Outlet
Hydraulic Ports: ......1/2" NPT Inlet
................................1/2" NPT Tank
SERIES 9305C-
HM3C-SP, -BSP
Cast Iron Centrifugal Pumps
Max. Flow Rate: ..............178 gpm
Max. Pressure: ..................154 psi
Ports: ..............2" NPT or BSP Inlet
......................2" NPT or BSP Outlet
Hydraulic Ports: ......1/2" NPT Inlet
................................1/2" NPT Tank
SERIES 9303C & 9303S
Cast Iron & Stainless Steel
Centrifugal Pumps
Max. Flow Rate: ..............147 gpm
Max. Pressure: ..................145 psi
Ports: ....................1-1/2" NPT Inlet
............................1-1/4" NPT Outlet
Hydraulic Ports: ......1/2" NPT Inlet
................................1/2" NPT Tank
SERIES 9306C & 9306S
Cast Iron & Stainless Steel
Centrifugal Pumps
Max. Flow Rate: ..............214 gpm
Max. Pressure: ..................150 psi
Ports: ..........................2" NPT Inlet
............................1-1/2" NPT Outlet
Hydraulic Ports: ....1/2" NPT Inlet
................................1/2" NPT Tank

-2-
1. Do not pump at pressures higher than the
maximum recommended pressure.
2. Maximum liquid temperature is 140oFfor Series
9300 centrifugal pumps.
3. Disconnect power before servicing.
4. Release all pressure within the system before
servicing any component.
5. Drain all liquids from the system before servicing
any component. Flush with water.
6. Secure the outlet lines before starting the pump. An
unsecured line may whip, causing personal injury
and/or property damage.
7. Check hose for weak or worn condition before each
use. Make certain that all connections are tightly
secured.
8. Periodically inspect the pump and the system
components. Perform routine maintenance as
required (See Repair Instructions).
9. Use only pipe, hose and fittings rated for the
maximum psi rating of the pump.
10. Do not use these pumps for pumping water or other
liquids for human or animal consumption.
Notes are used to notify of installation, operation, or
maintenance information that is important but not
safety related.
Caution is used to indicate the presence of a hazard,
which will or may cause minor injury or property
damage if the notice is ignored.
Warning denotes that a potential hazard exists and
indicates procedures that must be followed exactly to
either eliminate or reduce the hazard, and to avoid
serious personal injury, or prevent future safety
problems with the product.
Danger is used to indicate the presence of a hazard
that will result in severe personal injury, death, or
property damage if the notice is ignored.
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 compatible with the pump component materials.
Failure to follow this notice may result in severe
personal injury and/or property damage and will void
the product warranty.
1. Always drain and flush pump before servicing or
disassembling for any reason.
2. Always drain and flush pumps prior to returning
unit for repair.
3. Never store pumps containing hazardous
chemicals.
4. Before returning pump for service/repair,drain out
all liquids and flush unit with neutralizing liquid.
Then, drain the pump. Attach tag or include written
notice certifying that this has been done. It is illegal
to ship or transport any hazardous chemicals
without United States Environmental Protection
Agency Licensing.
Never use your hand to check the condition of
hydraulic lines or hoses. If hydraulic fluid penetrates
the skin, get medical help immediately. Failure to get
proper medical help may result in loss of limb or life.
The safest way to check hydraulic lines or hoses is by
holding a piece of cardboard next to the hydraulic line
or hose.
The sound pressure level of the pump is 80dBA.
Observe all safety precautions when operating the
pump within close proximity for extended periods of
time by wearing hearing protectors. Extended exposure
to elevated sound levels will result in permanent loss of
hearing acuteness, tinnitus, tiredness, stress, and other
effects such as loss of balance and awareness.
General Safety Information
Hazardous Substance Alert

-3-
Hydraulic Pumps
Hydraulic pumps come in two basic types:
•Constant displacement - which will continue to put
out its rated flow regardless of pressure, until the
relief valve bypasses the flow.
•Variable displacement - which will produce only
the flow needed by the implement until the total
pump output is reached. If less than the full pump
output is required, an automatic stroke control
mechanism decreases the pump output to maintain
aconstant pressure and flow. The output varies
according to demand.
The Closed Center Valve (See Figure 2) is used with
variable displacement pumps. The flow is completely shut
off in the neutral position, causing the pump stroke to adjust
to zero flow. The flow stops, but the pump maintains a static
pressure up to the valve.
Spool Valves
There are two basic types of spool valves used in
conjunction with these pumps — Open and Closed Center.
In the Open Center Valve (See Figure 1), the flow goes
straight through the valve when in the neutral position. This
type is used for constant displacement pumps where the
flow should never be shut off.
Figure 1
Open Center
Spool Valve
In Neutral
Position
Hydraulic Motors
Figure 3 shows an internal gear motor (Gerotor) where
pressure causes the cavities between the gears to expand
on one side, developing torque. The Gerotor type of
hydraulic motor is used on Hypro pumps for its superior
performance characteristics, including cooler running and
higher rpm capabilities.
Three Systems
Fitting these components together and installing a motor, we
have one of the three types of systems: Open Center,
Closed Center (pressure compensated) and Closed Center
Load Sensing (flow and pressure compensated).
Open Center Systems
In an Open Center System, the hydraulic pump puts out a
constant flow. If the pump puts out more oil than the motor
can use, a portion of the oil must be bypassed around the
motor. When the oil is bypassed around a loop and does no
work, the energy put into it by the pump turns into heat.
Therefore, the amount of oil bypassed should be kept to a
minimum. Use the largest motor possible.
Closed Center (Pressure-Compensated) Systems
The Closed Center Pressure-Compensated system has a
variable displacement pump which will deliver flow at the
necessary rate to maintain a specified pressure. It is
desirable to equip implements with a motor of a low flow
range that will cause the pump to operate between 1800
and 2100 psi [124 and 145 BAR]. A motor that requires a
large volume to obtain the correct implement speed usually
causes the hydraulic pump in a closed center system to
operate at a lower pressure than desirable. This low
pressure results in unnecessary flow and the generation of
heat that lowers the lubricating quality of the oil and may
damage transmission parts. Use the smallest motor
possible.
Closed Center Load Sensing Systems
(Flow and Pressure-Compensating)
The Closed Center Flow-Compensated System is a
variation of the pressure-compensated system, designed
primarily for more efficient operation and the generation of
less heat. It works on the principle of maintaining a constant
pressure drop from the pump to the work port of the selector
valve. Any variation in demand at the motor will cause a
change in flow. The system senses this change in flow due
to the change in pressure drop across the valve and causes
the pump to compensate by varying the pump flow. No
restrictor is used in the pressure line and no oil is bypassed.
Figure 3
Gerotor-Type
Hydraulic Motor
Inlet Outlet
Inner
Rotor
Rotor
Ring
Low
Pressure
High
Pressure
General Information—Hydraulic Systems
Figure 2
Closed Center
Spool Valve
In Neutral
Position

-4-
Plumbing Installation
7
6
Centrifugal Plumbing Hook-up
REF.DESCRIPTION
NO.
1 Tank Lid
2 Vent Line #3430-0456
3 Jet Agitator
4Shut-off Ball Valves
5Centrifugal Pump
6 Spray Control Console
7Centrifugal Pump Control
8 Manifold Boom Valve
9 Electromagnetic Flowmeter
10 Compact Jet Turret Nozzle Body

-5-
All Models — Open Center Systems
Models include Tank Port Adapter with built-in Check Valve
Assembly and Pressure Port Adapter.
HM2C and HM4C Models Only — Closed Center and
Small Open Center Systems.
Models include Tank Port Adapter with built-in Check Valve
Assembly and Pressure Port Adapter with three different
size metering orifices for HM4C models. The orifices are not
required for use with closed center systems with flow
control, such as John Deere closed center systems. Also, do
not use for small open center systems with a maximum flow
of 8 gpm [30.28 lpm] for HM2C model; 10 gpm [37.85 lpm]
for HM4C model. If necessary, the pressure port adapter
may be used without a metering orifice installed in any
closed center system. For best results, the pressure
differential across the motor should be less than 2500 psi
(170 bar).
Preliminary to Mounting
Consult the owners manual to determine the type and
capacity of the hydraulic system. Make sure the hydraulic
system is recommended to operate with a continuous load.
Refer to the Pump Selection Guide to confirm you have the
proper pump for your hydraulic system.
Check to see that the pump impeller can be turned by hand.
(Turn the shaft clockwise using a deep socket wrench on
the impeller nut.) If it cannot be turned, open the pump
casing to look for obstructions. Clean out any corrosion build
up where the casing fits over the eye of the impeller.
Pump Inlet Line
To achieve full capacity from the pump, the inlet line
should be at least the same size as the inlet port on the
pump. Reducing this line size will restrict the capabilities of
the pump. The line must also be free of air leaks. Check all
fittings and connections in the suction line for tightness.
The introduction of air may affect the priming and pumping
capabilities of the pump. Use good quality suction hose
that will not be collapsed by suction.
For non self-priming models, the centrifugal pump should
be mounted below the liquid level and as near to the liquid
source as possible to allow for the shortest suction line
practical. Toachieve optimal performance, the suction line
should slope down into the pump. Avoid rises and humps
that could trap air in the line to the pump. The suction line
and pump should be filled with liquid prior to starting the
pump, and all discharge lines should be open.
Pump Outlet Line
The recommended orientation for the outlet port is pointing
straight up. This allows liquid to stay in the pump while it is
priming. The outlet line should be the same size as the
pressure port on the pump to give the optimal flow.The
line should have as few restrictions and elbows as
possible to optimize the pump performance and reduce
pressure drop from the pump to the spray tips.
Priming the Pump
The pump must not be run dry.
Before starting the pump, the inlet line and pump must be
filled with liquid and all discharge lines must be open. On
self-priming models, only the pump chamber needs to be
filled with liquid. The pump must not be run unless it is
completely filled with liquid because there is a danger of
damaging the mechanical seal, which depends on the liquid
for its lubrication.
Non-self-priming models should be mounted below the level
of the liquid. The suction line should slope down to the
pump and be free of dips and bends. If this cannot be done,
afoot valve should be installed in the end of the inlet line so
that the line can be completely filled with liquid before
starting the pump.
For best priming results, the top vent plug should be
removed from the pump casing. A vent line (1/4" [6.35
mm] tubing is sufficient) should be installed running
back to the top of the tank. This line prevents air lock and
allows the pump to prime itself by bleeding offtrapped air.
The small stream of liquid that returns to the tank during
operation is negligible. The discharge from this line should be
positioned in the tank above the high liquid level. Self-priming
models can be primed by removing the top vent plug and
filling the priming chamber. 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.
Controlling the Pump Flow
The best way to control the flow is by incorporating two
control valves in a pipe tee immediately after the strainer in
the discharge line. This permits controlling agitation flow
independently of nozzle flow.
In any centrifugal pump, it is the large volume of liquid which
puts load on the drive. Use only the flow needed to develop
the pressure required at the boom and to maintain adequate
agitation. Hydraulic motor-driven centrifugal pumps are
easily adjusted to the exact flow required, as explained in
the Operating Instructions of this manual.
Centrifugal Pump Control
Hypro now offers many different components for spraying
systems. The Hypro centrifugal pump control incorporates
the electric flow control valve, a self-cleaning line strainer,
avisual pressure gauge and a manual agitation control
valve.
Flow Control Valve
A high-flow electric proportional valve allows for maximum
flow control to the boom valves. It provides smooth, rapid
control that can be controlled from either an electronic rate
controller or switch box.
Strainers
The recommended placement of the strainer for a
centrifugal pump is in the pump outlet line. This will
eliminate any possible restriction that the strainer could
Installation Instructions

create if it were installed in the inlet line. Ensure that the
proper strainer size and screen mesh are used to limit the
pressure drop and achieve the best filtration. Line strainers
can also be installed in the tank fill line to filter liquid as it is
loaded into the tank as well as in the boom lines to further
filter the solution prior to the spray tips. Tank baskets can
also be used to filter material added through the tank lid.
Agitation
The centrifugal pump control contains a manual agitation
control valve that can be adjusted to provide the right
amount of flow to the jet agitators in the tank to ensure
proper mixing within the tank.
Flowmeter
To eliminate the mechanical problems of a turbine
flowmeter, we recommend that an electromagnetic
flowmeter be used. These flowmeters have no moving
parts to wear out and will provide a more consistent and
accurate flow reading. They can be input into just about
any electronic rate controller or switch box.
Boom Section Valves
For rapid response and reliability, we recommend electric
plunger valves be used for boom control. The valves
should be sized accordingly to minimize the pressure drop
and maximize the flow rate. The boom tubing or hose
should be sized accordingly to ensure that a pressure drop
in the lines does not occur, causing inconsistent pressures
at the nozzles.
Nozzle Bodies
Nozzle bodies with shut-offcheck valves are
recommended to eliminate dripping from the spray tips
when the boom valves are shut down.
Hooking Up the Hydraulic Motor to the
Tractor Hydraulic System
Hypro Series 9300HMC hydraulic motor-driven pumps can
be mounted on either the tractor or sprayer. When hooking
up, make sure that no dirt or liquid gets into the hydraulic
motor. Keep all hydraulic connections clean. Be sure to
connect the hydraulic motor into the system correctly by
putting the pressure line to the Pressure Port Adapter and
return line to the Tank Port Adapter. The adapters on the
hydraulic motor are sized to accommodate 1/2" NPT fittings
on the pressure port and 3/4” NPT on the tank port. For
maximum performance, the hydraulic lines should also be at
least 1/2" [12.7 mm] in size for the pressure line and 3/4"
[19.05 mm] for the tank line.
The tank (OUT)port adapter with a built-in check valve
assembly will guard against reverse operation — allowing
you to reverse oil flow to operate other equipment. This
adapter must not be removed. On HM2C and HM4C
model pumps, the pressure (IN)port adapter is a two-piece
assembly consisting of an open (unrestricted) adapter with
three orifices packed loose with the pump. (See the
Operations Section.)
When using the HM2C or HM4C unit on any flow-
compensated (load sensing) closed center system, or any
small open center system with a maximum flow of 8 gpm
[30.28 lpm] for HM2C or 10 gpm [37.85 lpm] for HM4C, the
metering orifice should be removed from the pressure port
adapter. When using these units on flow-compensated
systems, connect to the motor priority circuit if your tractor has
one.
Standard spool valves, which are found on all tractor
hydraulic systems, may cause potentially damaging high
peak pressures in the hydraulic system when closed
because of abrupt shut-off of oil flow in both the supply and
return lines. When shutting off the pump, move the selector
to the FLOATposition to allow the centrifugal pump to come
to a stop gradually.
For further information
regarding Hypro products,
contact your local dealer or
Hypro directly at
www.hypropumps.com or by
calling 1-800-424-9776.
-6-
Open Center Systems— All Models
Adjusting Centrifugal Pump Output
HM1C, HM3C & HM5C motors have bypass screw fully
closed from the factory. HM2C & HM4C motors have
bypass screw set at 1-1/2 turns from fully closed from the
factory.
1. Open the bypass adjustment screw 2-1/2 turns from
fully closed. Turn the bypass screw in to achieve the
flow for the desired gpm and psi.
2. Start the tractor. Leave the directional valve in the
neutral position and allow hydraulic oil to circulate for
approximately 10 to 15 minutes or until adequately
warmed.
3. Prime the centrifugal pump with all valves open (See
the Installation Instructions and System Configuration
Diagram).
4. Close the agitation line valve and keep the control valve
and the boom shut-offvalve open. Note the spray
pressure.
5. Open the agitation line valve until you have desired
circulation in the tank. Recheck the spray pressure. If it
is too low,close down the agitation line valve until the
desired spray pressure is reached. If the spray pressure
is too high, throttle the centrifugal pump by closing down
the control valve.
Operation
Plumbing Installation

-7-
Closed Center (Pressure-Compensated) —
HM2C and HM4C Models Only
Onapressure-compensated system, the amount of oil that
isallowed to flow through the hydraulic motor is regulated
byametering orifice in the pressure port adapter. Three
different sizes of orifices are supplied with the HM2C and
HM4C model pumps to allow flexibility in the flow required
for individual sprayer needs.
The smaller the orifice, the less hydraulic oil goes through
the motor, so the pump will run slower and the flow of liquid
pumped and the spray pressure will also be less. As the
hydraulic oil flow is increased (by installing a larger orifice),
the amount of liquid being pumped and the spray pressure
is also increased.
Installing and Removing Metering Orifice
1. Shut off the hydraulic system.
2. Disconnect the line to the pressure port of the hydraulic
motor.
3. Remove the adapter from the motor using a 1-1/16''
wrench. Make sure the o-ring is on the metering orifice
before installing into port adapter.
4. The orifice is removed or installed in the port adapter by
tapping either in or out of the adapter.
A. To remove — tap the orifice out from the small end
of the adapter.
B. To install — tap the orifice in from the large end of
the adapter. The orifice is seated when a snap
sound is heard.
Adjusting Centrifugal Pump Output
1. Open the bypass adjusting screw in the hydraulic motor
three (3)turns.
2. Start the tractor and allow the hydraulic oil to circulate
for approximately 10 to 15 minutes or until adequately
warmed.
3. Close and lock down the bypass adjusting screw in the
hydraulic motor.
4. Prime the centrifugal pump with all valves open (See
Installation Instructions and System Configuration
Diagram).
5. Close the agitation line valve and the control valve;
open the boom shut-offvalve.
6. With the pump running, open the control valve until the
pressure gauge indicates the desired spraying
pressure.
7. Open the agitation line valve until sufficient agitation is
observed. Then, if spray pressure drops, readjust the
control valve to restore to the desired pressure.
8. If a sufficient boom pressure cannot be attained, install
the #2 size orifice and repeat Steps 5through 7.
9. If a sufficient boom pressure still cannot be attained with
the #2 size orifice, install the #3 size orifice and repeat
Steps 5through 7.
10. If a sufficient boom pressure still cannot be attained
with the #3 size orifice, remove the orifice and repeat
Steps 5through 7.
Closed Center (Load Sensing) — All Models
Many tractors are being introduced with load sensing
systems (also referred to as flow and pressure-
compensated systems) which simplify system setup and
eliminate many of the problems associated with using the
wrong size pump motors on a given hydraulic system.
Usually, any of Hypro’s 9300HMC models may be used on
this type of system, provided the hydraulic system produces
sufficient oil flow for the hydraulic motor being used (Refer
to the Pump Selection Guide).
This system maintains a constant flow of hydraulic oil for a
given pressure drop. The flow is adjustable with a flow
control valve installed in the hydraulic system (such as the
Tortoise/Hare control on John Deere tractors). Because this
system has adjustable flow, there is no need to bypass
hydraulic oil as in an open center system, or to restrict the
flow with orifices as in a closed center pressure-
compensated system.
Adjusting Centrifugal Pump Output
1. Make sure the orifice from the pressure port adapter of
the hydraulic motor has been removed (HM2C and
HM4C models only).
2. Close and lock down the bypass adjusting screw in the
hydraulic motor.
3. Set the tractor hydraulic flow control valve for minimum
hydraulic oil flow to the remote outlet (Tortoise position).
4. Start the tractor and allow the hydraulic oil to circulate
for approximately 10 to 15 minutes or until adequately
warmed.
5. Prime the centrifugal pump with all valves open (See
the Installation Instructions and System Configuration
Diagram).
6. Close the agitation line valve and open the control valve
and the boom shut-off valve.
7. Slowly adjust the tractor hydraulic flow control valve until
the desired boom pressure is attained.
8. Open the agitation line valve until sufficient agitation is
observed. If spray pressure drops, readjust the tractor
hydraulic flow control valve to restore it to the desired
pressure.
Flush Pump After Use
One of the most common causes for faulty pump
performance is gumming or corrosion inside the pump.
Flush the pump and entire system with a solution that will
chemically neutralize the liquid pumped. Mix this solution
according to the manufacturer’s directions. This will dissolve
most residue remaining in the pump, leaving the inside of
the pump clean for the next use.
To Prevent Corrosion
After cleaning the pump as directed above, flush it with a
permanent-type automobile antifreeze (Prestone®, Zerex®,
etc.) containing a rust inhibitor. Use a 50% solution, half
antifreeze and half water.Aprotective coating will remain on
the inner pump surfaces. Save the excess antifreeze for the
next application. Plug the ports to keep out air during
storage. For short periods of idleness, noncorrosive liquids
may be left in the pump, but air must be kept out. Plug the
ports or the seal port connections.

-8-
In the case of a severe pump seal leak, inspect the
Shaft/Bearing Assembly in the hydraulic motor for
possible contamination.
2. Using a 1/2'' box end wrench, remove the four bolts
holding the Motor to the Mounting Flange. Remove
Motor. [Remove the Plastic Back Cover flange. Knock
the Seal out from back with a hammer and screwdriver.
Use a 1/2'' socket wrench and 1/2'' box end wrench to
remove the Mounting Flange from the Hydraulic Motor.]
Pump Housing Disassembly
Instructions in italics describe procedures for the
Series 9300P Polypropylene Centrifugal Pumps, when
different than the cast iron pumps.
1. Using a 9/16" box end wrench, remove the four Hex
Head Bolts holding the Pump Casing to the Mounting
Flange. (If necessary, tap Pump Casing Outlet Port with
rubber mallet or hammer to separate.) [Using a 1/2"
wrench, remove the six bolts from the front. For the two
bottom bolts securing the base, you will need to hold the
two nuts with another 1/2" wrench. Also remove the
5/16" screw from the rear,near the outlet port.]
2. To remove the Impeller Nut, insert a large screwdriver or
file (at least 10" [254 mm] long) into Impeller Vanes to
prevent Impeller from turning when loosening nut. Use a
5/8" socket wrench to remove the Impeller Nut by
turning it counterclockwise (See Figure 6). [Use 7/8"
deep socket wrench to remove Plastic Seal Nut, then
9/16" deep socket to remove Metal Jam Nut and
Washer.]
Figure 6 Figure 7
Hypro Repair Tools:
T
ool Box No. 3010-0168 • 1/4" Allen Wrench No. 3020-0008
Support Bars (2) No. 3010-0064 • Port Brush No. 3010-0066
1/16" Allen Wrench No. 3020-0009 • Brush Holder No. 3010-0067 •
Large Retaining Ring Pliers No. 3010-0084 • Small Retaining Ring
Pliers No. 3010-0167
Shop Tools Needed
Bench Vice • Arbor Press • Air or Hand Drill • Small Knife
Metal Pipe - 1" dia. x 4" high (Bearing Seating Tool)
PVC Pipe - 3/4" dia. x 4" - 6" high (Seal Seating Tool)
12" Crescent Wrench • Two Flat Screwdrivers (approx. 10" long)
1/2'', 9/16", 5/8" and 7/8" sockets • Hammer or Rubber Mallet
Small Screwdriver (recommended) • Large File (optional)
1/2" and 9/16" Box End Wrench • Lubricating Spray (WD-40 or LPS)
Small amount Hydraulic Oil • Cleaning Solvent Tank (recommended)
3. Once nut [and washer]is removed, place a screwdriver
on each side behind the Impeller and pry away from the
Mounting Flange (See Figure 7). Remove Woodruff Key
from the Shaft. Remove O-ring from the Mounting
Flange.
Pump Seal Removal
1. Lightly lubricate the Shaft for easier removal of the Seal.
Using two screwdrivers positioned opposite each other,
pry the rotary portion of the Seal from the Shaft (See
Figure 8).
Figure 8
Repair Instructions
Figure 5
Outlet Port
Inlet Port
Mechanical
Seal
Ball
Bearing
Shaft
Seal Main
Bearings
Gerotor
Tank Port
Adapter
Pressure Port
Adapter
O-ring
Seal
Motor End
Plate
Gerotor
Housing
Motor
Body
Shaft
O-ring
Seal
Mounting
Flange
Pump
Casing
Drain/Vent
Plug
Stainless Steel
Wear Ring

-9-
On Models 9305C-HM3C-SP, 9505C-HM3C-BS and
9305C-HM3C, install the washer on the shaft prior to
installing the impeller nut.
Figure 9
3. Using a screwdriver and hammer, tap out the stationary
portion of the Mechanical Seal from the motor side of
the Mounting Flange. (If the motor is not removed, the
seal can be pried out with a small screwdriver.)
The seal will be damaged by removal in this manner. A
new seal must be used when pump is reassembled.
Clean-Up Of Pump Housing
1. Using a circular bottle-type wire brush with air or hand
drill, clean the Outlet Port, Inlet Port and the sealing
areas of the o-ring on the Pump Casing and Mounting
Flange. Using the port brush, clean the seal cavity in the
Mounting Flange. [The last step should not be
performed on the 9300P.]
2. After wire brush cleaning, it is recommended that the
Pump Casing and Mounting Flange be further cleaned
in a solvent tank to remove rust and corrosion particles.
Seal Replacement/Pump Housing Reassembly
If the hydraulic motor requires repair, proceed to
Disassembly and Repair of the Hydraulic Motor in the
next column.
1. Lubricate the seal cavity in the Mounting Flange with
WD-40®,LPS or equivalent. Do not lubricate the shaft.
2. Install the stationary portion of the Mechanical Seal by
sliding over the Shaft with the ceramic side out.
Make sure both the seal cavity and seal are clean and
lubricated.
3. To seat the seal in the seal cavity, use a piece of 3/4"
PVC pipe 4" to 6" [101.6 to 152.4 mm]in length.
Lubricate sealing surface on seal after it is seated. Do
not lubricate the shaft.
4. To install the rotary portion of the mechanical seal, place
it over the shaft with the carbon side facing in, and
press against the stationary portion (See Figure 9).
5. Install rubber gasket 1700-0100 over shaft against
rotary portion of seal.
The threads of the Plastic Seal Nut are fine and can be
easily cross threaded. To prevent cross threading, turn
the Plastic Seal Nut counterclockwise until area of
thread engagement is detected; then turn the Plastic
Seal Nut clockwise until it is secure. Do not over tighten
the Plastic Seal Nut.
6. Insert a Woodruff Key into the Shaft key slot; then place
the Impeller on the Shaft and align it with the Key and
press against the Mechanical Seal Assembly. Apply a
blue thread locking compound to the Impeller Nut, and
using a 5/8'' socket wrench and using a screwdriver to
hold the Impeller, install the Impeller Nut. [On
polypropylene models, insert the Woodruff Key into the
Shaft key slot. Place the Impeller on the Shaft and align
it with the Key; then press against the Mechanical Seal
Assembly. Place the Metal Seal Washer on the Shaft.
Apply a drop of blue thread locking compound on the
Impeller Nut and secure the Impeller to the Shaft as
described previously.]
7. Install the o-ring on the mounting flange. Replace the
o-ring if worn or damaged.
8. Place the pump casing on the mounting flange, insert
and tighten the bolts.
Disassembly and Repair of the Hydraulic Motor
The work area and motor should be as clean as
possible to prevent contamination of parts.
1. Remove the Mounting Flange from the motor body and
place Hydraulic Motor in vise.
2. Remove Tank Port Adapter and Pressure Port Adapter
with large crescent wrench or 1-1/16" and 1-3/8” box
end wrench (See Figure 10).
3. Using a 9/16" box end wrench, loosen the nut on the
Bypass Adjusting Screw (See Figure 10a).
4. Using a small screwdriver, remove the Bypass Adjusting
Screw from the Motor.(This will remove the Screw,Nut,
Washer and Thread-Seal Gasket.)
5. Using a 1/4" Allen wrench, remove the Socket Head
Cap Screws from the Motor End Plate (See Figure 10).
6. If Motor End Plate will not lift off easily, use a small
screwdriver to carefully pry apart the boss portion of the
End Plate and Gerotor Housing until free (See Figure
11). If Gerotor Housing will not lift off easily, carefully pry
Figure 10 Figure 10a

-10-
apart the boss area between the Gerotor Housing and
the Motor Body. (It may be necessary to alternate sides
when prying apart Motor sections.)
Figure 11
7. Remove both parts of the Gerotor.
8. On HM3C models, remove the Woodruff Key from the
Shaft. On HM1C, HM2C and HM4C models, remove
the Roll Pin from the Shaft.
9. Remove the o-ring from the Motor End Plate and Body
with a flat instrument such as a knife blade.
10. Inspect Motor End Plate, Body and Gerotor Housing for
wear and/or gouging. If gouging has occurred in both
the Motor End Plate and Body, the motor is not
repairable. If gouging has occurred in the Motor End
Plate, Body or Gerotor Housing, the part that is worn
must be replaced. If Gerotor Housing is damaged,
Gerotor parts must also be replaced.
ToRemove the Shaft Assembly from the Motor Body
1. Remove the Slinger Ring from the Motor Shaft.
Special attention should be exercised when working
with retaining rings. Always wear safety goggles when
working with spring or tension loaded fasteners or
devices.
2. Using the large retaining ring pliers, remove the Retaining
Ring next to the Ball Bearing in the Motor Body.
If bearing is binding against the retaining ring so that it
cannot easily be removed, place the motor body
(threaded portion of the shaft up) on arbor press. Using
apiece of un-threaded metal pipe (1" dia. x 4" high [254.
mm x 101.6 mm high]), slide over the shaft and gently
press down with the arbor press just enough to relieve
the pressure on the retaining ring.
Hydraulic Motor Shaft Disassembly and Repair
1. Remove Large Retaining Ring from Shaft with a
screwdriver. Remove Thrust Bearing Assembly from
Shaft (includes the Thrust Bearing and two Thrust
Bearing Races) and the Seal Spacer.
2. Remove the Small Retaining Ring next to the Shaft Ball
Bearing.
3. To remove the Bearing from the shaft, place the shaft
(threaded end up) in the arbor press fixture. Place the two
support bars provided in the repair kit opposite each other
and between the seal on the shaft and the arbor press
fixture. Using an arbor press, press the shaft through the
Bearing, Seal Spacer and Seal (See Figure 13).
4. Inspect the sealing area of the shaft for wear. Inspect
other Shaft Assembly Components for wear and replace
if necessary.
3. Place body in position on arbor press. Threaded portion
of the Shaft should be inside the fixture. Press out shaft
assembly with arbor press (See Figure 12).
5. While motor is completely disassembled, clean all parts
in a solvent bath.
Build Shaft Sub-Assembly
Figure 12
1. To assemble the seal cartridge, remove the old seal
from the cartridge by pressing it out. The cartridge is
reused by assembling the new seal into cartridge,
ensuring the new seal is pressed in with the lip
seal on the opposite side as shown in Fig.1.
Important: T
oprevent damage to the seal lip extending out,
use seal spacer as shown to guard lip during assembly.
2. Install the large retaining ring onto large diameter end of
shaft.
3. From the small, threaded end of the shaft, install the
following parts in this order: thrust bearing race, thrust
bearing, 2nd thrust bearing race.
Note: The thrust bearing and races should not be reused if
they are showing any signs of wear.
4. Install new type seal spacer (looks like a thick washer,
approx .130 inch thick).
5. Before installing the new seal, its lip must be expanded to
fit on the shaft. With the seal lip facing out, slide the seal
over the threaded end of the shaft and gently push the seal
onto the raised area of the shaft. Do not push the seal past
the large retaining ring groove on the shaft.
Fig. 1
Press
Seal Spacer
Seal
Cartridge
Figure 13

-11-
Reassembly of Remaining Hydraulic Motor Parts
1. Place Motor Body in a vise with large end of shaft facing
up.
2. Install the o-ring in the body.
3. Install the Roll Pin on the shaft. Place the Inner Gear of
the Gerotor onto the shaft making sure Gerotor slot
lines up with the key in the shaft.
The Roll Pin can slide up behind the inner gear of the
gerotor when the gear is installed. Make sure the key is
visible in the slot after the gear is in place.
4. Install the outer portion of the Gerotor, making sure the
Gerotor is centered within the o-ring groove on the
body.
5. Install the Gerotor Housing, making sure the pins in the
Gerotor Housing line up with their respective holes in
the body.
Figure 14
6. Once the seal has been expanded, remove the seal from
the shaft.
7. Install seal cartridge assembly: With seal lip facing the
large end of the shaft, slide the seal cartridge assembly
over the threaded end of the shaft and gently push into the
raised area of the shaft. Align the seal lip to enter
the center diameter of the seal spacer and push until seal
body touches seal spacer.
Important: If the seal lip is longer than the seal spacer’s width,
please stop the assembly and review parts being used.
8. Assemble two o-rings on the outside body of the new seal
cartridge assembly as shown in Fig 2. Install o-rings one at
atime and do not roll over each other.
9. Finished shaft sub-assembly should look like this:
10.Do not press, but place the shaft sub-assembly into the
motor body with threaded end of shaft up. Lubricate the
two o-rings with hydraulic or mineral oil before assembling.
(2) O-rings
Shaft
Fig. 2
2. Install the new ball bearing onto the threaded end of
the shaft. Press down using the 1” x 4” pipe until the
retaining ring can be installed in its groove in the
bearing core of the motor body. Install the retaining
ring.
3. Turn the motor body assembly over (threaded shaft
end down) on the arbor press. Press the shaft down
into its “final position” until the small retaining ring can
be installed in the shaft next to the ball bearing.
4. Install small retaining ring on shaft.
5. Check shaft rotation at this point. It should rotate
smoothly with only slight resistance from the seal lip
pressure on the shaft. If you feel any gritty or sticking
movement, return assembly to the arbor press and
lightly press on the threaded end of the shaft to relieve
press fit compression on the thrust bearing. Note:
Don’t over do this press. The objective is to move the
small outer retaining ring installed in the
previous step back to ” touching only” the ball bearing
inner race.
Important: If gritty or sticky movement persists, it’s likely
due to re-used parts or the body needle bearing is in
need of replacement.
Figure 15
Install Shaft Sub-Assembly Into Motor Body
Important: Make sure the surface edge of the arbor press
fixture is smooth and clean. An unthreaded piece of
pipe (1” x 4” high) is needed to support the outer race
of the seal cartridge sub-assembly and outer race of
the ball bearing during assembly. Place this pipe over
the shaft threaded end for assembly of the following
steps.
1. Place the body on a support fixture in the arbor press.
Using an unthreaded piece of pipe (1” dia. x 4” high),
press the shaft subassembly down into the body until
it bottoms out. This is a light press fit and should be
done slow and easy.

-12-
If the proper Hydraulic Pump Unit has been selected
according to Hypro recommendations, and the unit has been
correctly plumbed into the hydraulic system, operation should
be quite satisfactory.If spraying performance is unsatisfactory
or hydraulic system heat is excessive etc., check the
following troubleshooting guide for possible problems and
solutions.
Symptom Probable Cause(s) Corrective Action(s)
Low discharge Pump not primed. — Remove top most vent plug from face of pump and run
pump to expel trapped air (see Installation Instructions).
Air leaks in inlet line. — Check and reseal inlet fittings.
Blocked or clogged line strainer. — Inspect strainer and clear any debris from screen.
Impeller plugged. — Inspect and clear obstruction.
Undersize inlet line or — Suction line should be the same diameter as inlet port of pump or larger.
collapsed hose.
Improperly sized hydraulic motor. — Refer to Pump Selection Guide to determine proper size
hydraulic motor for your hydraulic system.
Bypass Adjustment Screw not — Adjust bypass screw on side of hydraulic motor
set properly. in until the desired output is attained.
Eye of impeller rubbing on volute. — Remove volute (front cover) and inspect the impeller.
If wear detected, sand the impeller eye O.D. with emery cloth.
Hydraulic system Improper hydraulic motor size. — Refer to Pump Selection Guide to determine proper size for
overheating your hydraulic system.
Bypass Adjustment Screw — Close adjustment screw on side of hydraulic motor
set to bypass too much oil. to lessen the amount of oil being bypassed.
Improper metering orifice — Install proper size orifice. Refer to Installation section for proper sizing.
installed in pressure port.
Insufficient hydraulic hose size. — Check hydraulic hose size. Hose should be at least 1/2" [12.7 mm]
on the pressure port and 3/4” [19.05mm] on the tank port.
Troubleshooting Guide
Troubleshooting
6. Lightly lubricate the area between the Inner and Outer
Gerotor, the Outer Gerotor, and Gerotor Housing with
hydraulic oil or mineral oil.
Special attention should be exercised when working
with retaining rings. Always wear safety goggles when
working with spring or tension-loaded fasteners or
devices.
7. Install o-ring on the motor end plate.
8. Place end plate on gerotor housing, making sure holes
in end plate line up with pins in the gerotor housing.
9. Install four Socket Head Cap Screws in Motor End
Plate, and using a 1/4" Allen wrench, tighten Cap
Screws alternately and evenly in a crisscross pattern to
approximately 15 foot pounds [ 20 Nm] of torque.
10. Install the Thread Seal Gasket on the Bypass Adjusting
Screw. Put the Gasket on from the slotted end and turn
until four threads on the screw are showing. Install the
Washer and the Nut. Install Bypass Adjusting Screw in
the motor end plate.
A. For closed center hydraulic systems, turn the
Bypass Adjusting Screw in until it bottoms out in the
End Plate. Tighten nut down with 9/16" box end
wrench.
B. For open center hydraulic systems, turn the Bypass
Adjusting Screw in until it bottoms out in the End
Plate; then turn back out 11⁄2full turns. Holding the
Bypass Adjusting Screw with a screwdriver, tighten
Nut. (Motor will then have to be readjusted to tractor
system.)
11. Replace o-ring on both port adapters.
12. Install Pressure Port Adapter and Tank Port Adapter
back onto the motor. (For ease of installation, tighten
the Pressure Port Adapter first, then the Tank Port
Adapter.)
13. Remove Hydraulic Motor from the vise. Turn shaft by
hand to check for binding.
14. Install Slinger Ring over Motor Shaft.
15. Install Motor into Pump Mounting Flange. Insert four
Hex Head Bolts; then alternately and evenly tighten
them. [For polypropylene models, secure the Hydraulic
Motor to the Mounting Flange with four Hex Head Cap
Screws and Nuts. The nuts should be visible when the
assembly is complete.]

-13-
GRAPHS FOR HYDRAULICALLY-DRIVEN CENTRIFUGALS
Performance Graphs
9302 9302
9303
100
90
80
70
60
50
40
30
20
10
0
0 20 40 60 80 100 120
GPM
P
S
I
B
A
R
0 50 100 150 200 250 300 350 400 450
9303C-HM1C-SP Performance at 11 GPM
L/min
0
2
1
3
4
5
6
1-1/2˝ Inlet Hose
Feet of lift = 15 10 50
9302CT-GM1 & 9302ST-GM1

-14-
Performance Graphs
120
100
140
80
60
40
20
0
0 20 40 60 80 100 120
GPM
P
S
I
B
A
R
0 50 100 150 200 250 300 350 400 450
9303C-HM1C-SP Performance at 13 GPM
L/min
0
2
1
3
4
5
6
7
9
8
1-1/2˝ Inlet Hose
Feet of lift = 15 10 50
20
30
40
10
0
0 10 50 60 70 80304020
GPM
P
S
I
B
A
R
050 100 150 200 250 300
9303C-HM2C-SP Performance at 4 GPM
L/min
0
0.5
1
1.5
2
2.5
Feet of Lift = 15 10
5
0
1-1/2˝ Inlet Hose
50
70
80
60
40
30
20
10
0
0 60 80 100 1204020
GPM
P
S
I
B
A
R
0 50 100 150 200 250 300 350 400 450
9303C-HM2C-SP Performance at 6 GPM
L/min
0
1
2
Feet of Lift = 15 10 50
1-1/2˝ Inlet Hose
3
4
5
9303 9303
100
120
80
60
40
20
0
020 40 60 80 100 120
GPM
P
S
I
B
A
R
0 50 100 150 200 250 300 350 400 450
9303C-HM1C-SP Performance at 12 GPM
L/min
0
2
1
3
4
5
6
7
8
1-1/2˝ Inlet Hose
Feet of lift = 15 10 50

-15-
Performance Graphs
30
40
50
20
10
0
0 20 80 1006040
GPM
P
S
I
B
A
R
0 50 100 150 200 250 300 350
9303C-HM3C-SP Performance at 15 GPM
L/min
0
1
0.5
1.5
2
2.5
3
Feet of Lift = 15 10 50
1-1/2˝ Inlet Hose
30
40
50
60
70
80
20
10
0
0 20 80 100 1206040
GPM
P
S
I
B
A
R
0 50 100 150 200 250 300 350 450 450
9303C-HM3C-SP Performance at 18 GPM
L/min
0
1
2
3
4
5
Feet of Lift = 15 10 50
1-1/2˝ Inlet Hose
40
50
60
70
80
90
20
30
10
0
0 20 80 100 1206040
GPM
P
S
I
B
A
R
050 100 150 200 250 300 350 450 450
9303C-HM3C-SP Performance at 20 GPM
L/min
0
1
2
3
4
5
6
Feet of Lift = 15 10 50
1-1/2˝ Inlet Hose
9303 9303

-16-
Performance Graphs
80
100
120
60
40
20
0
020 8060 10040 120
GPM
P
S
I
B
A
R
0 50 100 150 200 250 300 350 400 450
9303C-HM5C-SP Performance at 14 GPM
L/min
0
3
2
1
4
5
6
7
8
Feet of Lift = 15 10 5 0
1-1/2˝ Inlet Hose
80
100
120
60
40
20
0
020 8060 10040 120
GPM
P
S
I
B
A
R
0 50 100 150 200 250 300 350 400 450
9303C-HM5C-SP Performance at 15 GPM
L/min
0
3
2
1
4
5
6
7
8
Feet of Lift = 15 10 5 0
1-1/2˝ Inlet Hose
100
40
50
60
70
80
90
20
30
10
0
02010 4030 50 60 70 80 90
GPM
P
S
I
B
A
R
0 50 100 150 200 250 300
9303P-HM2C
L/min
0
3
2
1
4
5
6
5GPM
6GPM
7GPM
100
120
140
80
60
40
20
0
0 20 40 60 80 100 120
GPM
P
S
I
B
A
R
050 100 150 200 250 300 350 400 450
9303P-HM1C
L/min
0
3
2
1
4
5
6
7
8
9
11GPM
12GPM
13GPM
100
80
90
70
50
30
10
60
40
20
0
0 20 40 60 10060 120
GPM
P
S
I
B
A
R
0 50 100 150 200 250 300 350
9303P-HM3C
L/min
0
3
2
1
4
5
6
18 GPM
15 GPM
20 GPM
9303 9303
80
90
70
50
30
10
60
40
20
0
020 8060 10040 120
GPM
P
S
I
B
A
R
0 50 100 150 200 250 300 350 400 450
9303C-HM5C-SP Performance at 13 GPM
L/min
0
3
2
1
4
5
6
Feet of Lift = 15 10 5 0
1-1/2˝ Inlet Hose

-17-
Performance Graphs
80
90
70
50
30
10
60
40
20
0
0 20 40 60 8070503010 90
GPM
P
S
I
B
A
R
050 100 150 200 250 300
9303P-HM4C
L/min
0
3
2
1
4
5
6
6GPM
5GPM
7GPM
120
100
40
80
60
20
0
0 20 40 60 80 100 120
GPM
P
S
I
B
A
R
0 50 100 150 200 250 300 350 400 450
9303P-HM5C
L/min
0
3
2
1
4
5
6
7
8
12 GPM
14 GPM
13 GPM
15 GPM
60
100
120
80
40
20
0
0 150 200 25010050
GPM
P
S
I
B
A
R
0 100 200 300 400 500 600 700 800 900
9304C-HM1C
L/min
0
1
2
3
4
5
11 GPM
12 GPM
13 GPM
6
7
8
60
140
120
100
80
40
20
0
0 150 200 25010050
GPM
P
S
I
B
A
R
0 100 200 300 400 500 600 700 800 900
9304C-HM5C
L/min
0
1
2
3
4
5
6
15 GPM
16 GPM
17 GPM
7
8
9
9304C-HM3C
9305C-HM3C
160
140
120
100
80
60
40
20
0
020 40 60 80 100 120 140 160 180 200
GPM
P
S
I
0 100 200
19 GPM
18 GPM
17 GPM
300 400 500 600 700
L/min
B
A
R
9
10
11
7
6
8
4
2
3
5
1
0
9303
9304 9305
9304

-18-
Performance Graphs
60
80
120
100
140
40
20
0
0 20 100 120 140 160608040
GPM
P
S
I
B
A
R
0 100 200 300 400 500 600
9305C-HM3C-SP, BSP Performance at 18 GPM
L/min
0
1
2
3
4
5
6
7
8
9
Feet of Lift = 15 10 50
2˝ Inlet Hose
80
60
100
140
120
160
40
20
0
0 20 100 120 140 160608040
GPM
P
S
I
B
A
R
0 100 200 300 400 500 600
9305C-HM3C-SP, BSP Performance at 19 GPM
L/min
0
2
4
6
8
10
Feet of Lift = 15 10 50
2˝ Inlet Hose
9306
9305
60
80
100
120
40
20
0
020 100 120 140 160608040
GPM
P
S
I
B
A
R
0 100 200 300 400 500 600
9305C-HM3C-SP, BSP Performance at 17 GPM
L/min
0
1
2
3
4
5
6
7
8
Feet of Lift = 15 10 50
2˝ Inlet Hose

-19-
9302C and 9302S Series Pumps
22 21720-0110 O-ring
23 1 1600-0045 Dowel Pin (HM2C / HM4C)
23 1 1600-0044 Dowel Pin (HM1C)
24 1 1600-0042 Dowel Pin (HM2C / HM4C)
24 1 1600-0037 Dowel Pin (HM1C)
25 1 3900-0022 Gerotor (HM1C)
25 1 3900-0023 Gerotor (HM2C)
25 1 3900-0025 Gerotor (HM4C)
26 1 0701-2500C1 Gerotor Housing (HM2C Models) 1/4” wide
26 1 0700-2500C1 Gerotor Housing (HM1C Models) 1/2” wide
26 1 0703-2500C1 Gerotor Housing (HM4C Models) 5/16” wide
27 10254-2500C2 Motor End Plate (includes needle bearing)
28 4 2270-0039 Washer
29 4 2220-0045 Cap Screw (HM2C / HM4C Models)
29 42220-0021 Cap Screw (HM1C Models)
30 1 1720-0108 O-ring
31 13360-0021A Pressure Port Adapter (includes o-ring)
32 1 1720-0262 O-ring
33 1 3320-0051A Tank Port Adapter (includes o-ring)
34 1 3220-0029 Bypass Adjusting Screw
35 11700-0047 Gasket
36 1 2270-0027 Washer
37 1 2250-0038 Lock Nut
38 1 1610-0032 Roll Pin (HM2C / HM4C)
38 1 1610-0031 Roll Pin (HM1C)
39 11810-0026 Snap Ring
40 1 1610-0012 Woodruff Key (9302C)
40 1 04432 Woodruff Key (9302S)
1 4 2406-0007 Drain/Vent Plug (9302C)
1 4 2406-0016 Drain/Vent Plug (9302S)
2 1 0150-9200C Pump Casing (Model 9302C)
2A 1 0156-9200S Pump Casing (Model 9302S)
31 2253-0002 Impeller Nut (9302C)
31 2253-0006 Impeller Nut (9302S)
410401-9100P Impeller (Nylon Std. 9302C)
4 1 0402-9100P Impeller (Polypropylene Optional) (Std 9302S)
5 1 1720-0083 O-ring
6 1 1700-0100 Gasket
712120-0009 Mechanical Seal (Viton/Ceramic) (Std 9302C)
7 1 3430-0589 Mechanical Seal (Silicon Carbide) (Std 9302S)
8 1 0750-9300C Mounting Flange (9302C)
810756-9300S Mounting Flange (9302S)
9 4 2210-0020 Hex Head Cap Screw (9302C)
942210-0125 Hex Head Cap Screw (9302S)
10 1 1410-0056 Slinger Ring
11 1 1810-0014 Snap Ring
12 1 1820-0013 Retaining Ring
13 12000-0010 Ball Bearing
14 1 1410-0131 Cartridge, Front
15 2 1720-0268 O-ring
16 1 2104-0010 Lip Seal
17 1 1410-0130 Seal Spacer
18 12029-0014 Thrust Bearing Assembly
19 1 0531-2500 Shaft (HM2C/HM4C)
19 1 0533-2500 Shaft (HM1C)
20 1 0150-2500C Motor Body (includes needle bearing)
21 42210-0005 HexHead Cap Screw
Ref. Qty.
No. Req'd. Part No. Description
Ref. Qty.
No. Req'd. Part No. Description
Parts Kit No. 3430-0748
Contains: One each ball bearing
(Ref. 13), motor shaft seal (Ref.
16), thread seal gasket (Ref. 35),
two cartridge o-rings (Ref. 15) and
washer (Ref. 36); two each motor
housing o-rings (Ref. 22), and port
adapter o-rings (Ref. 30 & 32).
Hydraulic Motor Part Nos.
2500-0081C (HM1C Models)
2500-0082C (HM2C Models)
2500-0084C (HM4C Models)
Adapter Kit No. 3430-0187
(HM2 and HM4 Models Only):
Contains one each:
No. 3360-0021 Pressure Port
Adapter
No. 3373-0020 (Size #1)
No. 3373-0021 (Size #2)
No. 3373-0022 (Size #3)
No. 1720-0108 Adapter O-ring and
No. 1720-0105 Orifice O-ring (Qty. 3)
NOTE: When ordering parts, give
QUANTITY, PART NUMBER,
DESCRIPTION, and COMPLETE
MODEL NUMBER. Reference
numbers are used ONLY to identify
parts in the drawing and are NOT
to be used as order numbers.
Repair Parts Kit No. 3430-0332
Contains: One o-ring (Ref. 5),
one rubber gasket (Ref. 6), and
one mechanical seal (Ref. 7).
Silicon Seal Kit No. 3430-0589
Contains one each:
1720-0083 o-ring (Ref. 5)
and mechanical seal (silicon car-
bide) (Ref.7).