Pentair HYPRO 1802C Use and care manual

ydraulically-Driven Pressure Washer
Models 1802C, 1803C, 1804C, 1805C, 1806C,
1807C, 1824C, 1825C, 1826C and 1827C
Form L-0560PW
General Safety Information
1803C 3.0 1000 5.0 1300 Forged Brass Head Triplex Pump with 28 lbs.
hydraulic motor, adjustable unloader, gauge,
1⁄2"PT input, 3⁄8"quick disconnect output
1805C 3.0 1500 8.0 1900 Forged Brass Head Triplex Pumps with 26 lbs.
1807C 3.0 2000 11.0 1300 hydraulic motor, chemical injector, 26 lbs.
1825C 4.0 1500 8.5 2000 adjustable unloader, gauge, 3⁄4" GH input, 33 lbs.
1827C 4.0 2000 8.5 2000 3⁄8"quick disconnect output 33 lbs.
Hydraulically-Driven Pressure Washers
Model Max. Max. Es ima ed
Number GPM PSI GPM PSI Descrip ion Weigh Ea.
Hydraulic Mo or
Requiremen s
1802C 3.0 1000 5.0 1300 Forged Brass Head Triplex Pump 38 lbs.
with hydraulic motor, adjustable unloader,
gauge, 1⁄2"PT input, 3⁄8"quick disconnect output,
and 50 ft. hose and gun assembly
1804C 3.0 1500 8.0 1900 Forged Brass Head Triplex Pumps with hydraulic 41 lbs.
1806C 3.0 2000 11.0 1300 motor, chemical injector, adjustable unloader, 26 lbs.
1824C 4.0 1500 8.5 2000 gauge 3⁄4"GH input, 3⁄8"quick disconnect output, 49 lbs.
1826C 4.0 2000 8.5 2000 and 50 ft. hose and gun assembly 49 lbs.
Hydraulically-Driven Pressure Washers wi h Hose and Gun Assembly
Model Max. Max. Es ima ed
Number GPM PSI GPM PSI Descrip ion Weigh Ea.
Hydraulic Mo or
Requiremen s
Installation, Operation, Repair, and Parts Manual
Rev. B
Description
HYPRO®®
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.
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 can 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 unless the pump is properly
grounded and the proper drive is used. The pump
should only be used with liquids compatible with the
pump materials. Failure to follow this notice can
result in severe personal injury and/or property
damage and will void the product warranty.

2
azardous Substance Alert
Installation Requirements
Hypro’s Hydraulically-Driven Pressure Washer can be
installed on tractors with Closed Center and Load Sensing
Hydraulic Systems, or on Custom Open Center Hydraulic
Systems.
The required inlet conditions for the water pump can vary
from the flooded suction of a water tank to pressure from a
city water supply. The water supply must be capable of
supplying more than 4.0 gpm of water flow to meet the
pump requirements.
The pump comes equipped with an unloader valve and
bypass system rated for 2000 psi. When the trigger of the
gun is in the OFF position, the unloader allows water to
recirculate back through the pump. A thermal relief valve
is included to keep the pump from overheating when it is
in the bypass mode with the gun trigger in the OFF
position. For long pump life, do not allow the pump to run
more than five minutes with the gun trigger in the OFF
position.
Ensure that the thermal relief valve is oriented such that
the slot for the outlet is facing down.
Always drain and flush the pump before servicing.
Always drain and flush the pump prior to returning
the Pump to ypro for repair.
Never store a pump containing hazardous materials.
Prior to returning a pump for service or repair, drain
all liquids and flush the pump with a neutralizing fluid;
then, drain the pump again, and attach a tag or written
notice certifying that this procedure has been done.
It is illegal to ship or transport any hazardous
chemical 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 may exceed
80dBA. Observe all safety precautions when
operating the Pump within close proximity for
extended periods 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.
Do not pump at pressures higher than the maximum
recommended pressure.
Operate the Pump between a temperature range of
45oto 140oF [7oto 60oC].
Make certain that the power source conforms to the
requirements of your equipment.
Provide adequate protection in guarding around the
moving parts such as shafts and pulleys.
Disconnect the power before servicing.
Release all pressure within the system before
servicing any component.
Drain all liquids from the system before servicing.
Secure the discharge line before starting the pump.
An unsecured discharge line may whip, resulting in
personal injury and/or property damage.
Check all hoses for weak or worn condition before
each use. Make certain that all connections are tight
and secure.
Periodically inspect the pump and the system
components. Perform routine maintenance as
required.
Use only pipe, hose, and hose fittings rated for
maximum rated pressure of the pump or the pressure
at which the pressure relief valve is set at. Do not use
used pipe.
Do not use these pumps for pumping water or other
liquids for human or animal consumption.

3
Unloader Valve Instructions
The Unloader is factory set to a maximum of 2000
psi [138 BAR]. Do not tamper with the Unloader
Valve settings or with the Locking Ring. ydraulic
System damage may result if the Unloader is
adjusted outside the range of 2000 psi [138 BAR].
The Unloader Valve is factory tested and preset to
2000 psi [138 BAR]. Adjustment is necessary only if the
unloader is not functioning properly.
1. For priming, the Spray Gun and Hose Assembly (Kit
8000-0030) should be detached from the pump at
the Quick Disconnect (See Figure 1).
2. Start the Pump and run it until it is fully primed, with
water flowing freely out of the Quick Disconnect.
Then, stop the Pump and reattach the Spray Gun
and Hose Assembly at the Quick Disconnect (See
Figure 1).
3. Pull the Gun Trigger, restart the Pump, and observe
the pressure. The Hydraulic System and/or Bleeder
Bypass Screw may require adjustment to obtain the
proper pressure of 2,000 psi [138 BAR] (Refer
Hydraulic System Operation for further information).
4. Open and close the Pressure Wash Gun several
times to check the unloading pressure and Unloader
Valve function.
5. The standard Pressure Washer is equipped with an
adjustable cleaning angle nozzle. The cleaning
angle may be varied throughout its range by rotating
the black outer body clockwise (CW) or
counterclockwise (CCW).
6. Your Pressure Washer is equipped with the optional
Detergent njection System. The nozzle must be set
in Low Pressure Mode to activate the injector and
draw soap. For rinsing, the nozzle should be set in
High Pressure Mode. Pushing the black nozzle
body forward places the nozzle in the Low Pressure
Mode. Pulling the black nozzle body back places the
nozzle in the High Pressure Mode.
Before Starting Up
Figure 1
ydraulically-Driven Pressure Washer ookup
Fresh Water
Flooded Section
Municipal Water
Supply Access
3/4" ose
i-Lo
Spray Nozzle
3/4" Garden ose
Adapter
3/4" Strainer
80 Mesh
P/N 3350-0035,
3350-0045,
3350-0035A
or equivalent
ydraulic Quick
Disconnect
matches
female end
on Kit 8000-0030 &
8000-0049
5,000 psi
Gauge
ydraulic Input
1/2" NPT (F) Pressure Port
3/4" NPT (F) Tank Port
Four
25/64 Dia.
oles
Thermal Relief Valve
Spray Gun
and ose
• Gun, Lance, Nozzle & ose Assembly includes 50'
pressure hose, gun, wand, nozzle, and female quick
disconnect.
• Tank is mounted even or above the pump.
Mount the tank higher if the inlet hose length is over 15 ft.
• Never run the pump dry.
• If suction inlet hose is more than four feet long, use next
larger size.
Full-Flow, 3/4"
Shut-Off Valve
Figure 2
Check oil level
Check that the oil is at the correct level using the
Dipstick, and topping off if necessary (See Figure 2). Use
Hypro Oil (part no. 2160-0038). Hypro oil is specially
formulated, high grade, non-detergent, SAE 30 weight oil
designed to prolong Pump life.

4
ydraulic System Operation
Pump Repair Instructions
Plunger Replacement.
1. Using a metric allen wrench, remove the Socket
Head Cap Screws securing the Pump Head to the
Pump Body (See Figure 3).
2. While turning the Crankshaft, use two screwdrivers to
carefully pry between the Pump Head and Pump
Body to remove the Pump Head (See Figure 4).
3. Remove the plunger Retaining Nut and the Plunger
Retaining Nut Washer (See Figures 5).
4. Slide the Plungers off the Piston Guides (See
Figure 5).
5. Remove and discard the O-rings (See Figure 5).
6. Remove the Slinger Ring (See Figure 5).
Figure 3
Remove
Socket ead Cap
Screws
Figure 4
While turning the
crankshaft, use
screwdrivers to pry
the pump head off.
ydraulic Systems
There are three types of Hydraulic Systems: Open center,
Closed Center (Pressure Compensated), and Closed
Center Load Sensing (Flow and Pressure Compensated).
Open Center Systems
n an Open Center System, the hydraulic pump puts out a
constant flow. f the Pump puts out more than the Motor
can use, a portion of the oil must be bypassed around the
Motor. The Bleeder Bypass Screw allows the fluid to
bypass 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, this should only be
used on smaller Open Center Systems where the amount
of oil that must be bypassed is minimal.
Closed Center (Pressure Compensated) Systems
Closed Center (Pressure Compensated) Systems have a
Variable Displacement Pump that will deliver flow at the
necessary rate to maintain a specified pressure. The Flow
Control Valve should be installed at the Motor nlet to
control the flow according to the Model requirements.
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. t works on the principle of maintaining a
constant pressure drop from the pump to the working 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
Do not bypass oil. Use a Flow Control at the Motor
Inlet to control the flow and speed of the motor.
ydraulic Oil
The specifications for the Hydraulic-Driven Pressure
Washer where compiled using Mobil DTE-26 hydraulic oil
at a temperature of 140° F [60° C]. Using other type of oil
and different temperatures will result in different flow
requirements to replicate these Pressure Washer
performance specifications. These specifications are a
guide for initial start-up.
Keep all hydraulic connections clean. The recommended
filter for the hydraulic motor is one that removes
particulates greater than and including 10 microns. The
>10 micron filter should be placed on the return line of the
hydraulic system to mitigate the risk of contaminating the
oil tank.
Change the oil after 40 hours of break-in operation.
Thereafter, change the oil every year or 500 hours,
whichever comes first.
Care of the Pump
After each use, flush the pump with a neutralizing solution
for the liquid pumped. Follow this with a clear water rinse.
For storage under freezing conditions, flush the pump with
a 50/50 solution of automotive-type antifreeze and water.
Bypass Operation
During Bypass Operation (when water is diverted back to
the pump inlet side) a temperature rise occurs. A Thermal
Relief Valve is provided to maintain the maximum water
temperature at 145° F [63° C].

Apply a thin film of oil to the new O-rings and
Plungers before installing them.
7. nspect the Plungers for cracking and replace them if
damaged installing new O-rings and Slinger Rings at
the same time.
8. nstall the Plunger Retaining Nut Washers: then,
apply a drop of blue thread locking compound to the
threads of the Plunger Retaining Nuts and install
them.
9. Tighten the Plunger Retaining Nuts to 88 in. lbs.
[9.8 Nm] torque (See Figure 5).
If you are replacing the Packings, proceed with
Packing Replacement.
10. Lubricate the Plungers and install the Pump Head
onto the Plungers: then, push the Pump Head
against the Pump Body.
11. nstall the Socket Head Cap Screws removed in
Step 1; then tighten them as shown in Figure 6 to 88
in. lbs. [9.8 Nm] torque.
Packing Replacement
Water leakage between the pump head and pump body
indicates the plunger packings require replacement.
1. Using a metric allen wrench, remove the socket
head Cap Screws securing the pump head to the
pump body (See Figure 3).
2. While turning the crankshaft, use two screwdrivers
to carefully pry between the pump head and pump
body to remove the pump head (See Figure 4).
3. Using Extractor Pliers, remove the Seal Retainers
and Seals (See Figure 7).
4. Using a small blade knife, remove the Seals from
the Seal Retainers.
5
Figure 5
Figure 6
5. Lightly lubricate and install new seal kit items in the
order shown in Figures 8 and 9.
6. Lightly lubricate the plungers and install the pump
head onto the plungers: then push the pump head
against the pump body.
7. nstall the socket head Cap Screws removed in
Step 1; then tighten them as shown in Figure 6 to
88 in. lbs. [9.8 Nm] torque.
Plunger Retaining
Nut
Slinger Ring
Plunger
Plunger Retaining
Nut Washer
Alternately and evenly tighten the
Socket ead Cap Screws to
88 in. lbs. [9.8 Nm] torque.
Figure 9
Figure 8
Figure 7
Using Ex rac or
Pliers o remove
Seal Re ainers
and Seals
Suppor Ring
Models
1806C & 1807C
Packing
Replacemen
Seal
O-ring
Pis on Guide
Seal
Seal
Models
1826C & 1827C
Packing
Replacemen
O-ring
Gasket
Seal Re ainer
Seal
O-ring
Seal Re ainer
Seal

6
Valve Replacement
Erratic or low-pressure operation may be the result of
debris in the Valves or Worn Poppets and/or Seats.
1. Remove the Plugs; then using needle nosed pliers,
remove the Valves (See Figure 10).
2. Remove and discard the old O-ring (See Figure 10).
3. nspect the Valves for signs of debris and/or wear. f
worn or damaged, replace the Valves and install new
O-rings (See Figure 10).
4. nstall the Plugs and tighten them to 25 ft. lbs.
[33.9 Nm] torque (See Figure 10).
Figure 10
Plug
Plug
O-ring
O-ring
O-ring
O-ring
Valve
Valve
ydraulic Motor Repair Instructions
Disassembly and Repair of the ydraulic Motor
The work area and motor should be as clean as possible
to prevent contamination of parts.
1. Remove the motor from the pump assembly 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 11).
3. Using a 9/16" box end wrench, loosen the nut on the
Bypass Adjusting Screw (See Figure 11a).
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
11).
6. f 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 12). f Gerotor Housing will not lift off easily,
carefully pry apart the boss area between the Gerotor
Housing and the Motor Body. ( t may be necessary to
alternate sides when prying apart Motor sections.)
Figure 11 Figure 11a
Figure 12
7. Remove both parts of the Gerotor.
8. 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. nspect Motor End Plate, Body and Gerotor Housing
for wear and/or gouging. f gouging has occurred in
both the Motor End Plate and Body, the motor is not
repairable. f gouging has occurred in the Motor End
Plate, Body or Gerotor Housing, the part that is worn
must be replaced. f Gerotor Housing is damaged,
Gerotor parts must also be replaced.
To Remove the Shaft Assembly from the Motor Body
Special attention should be exercised when working
with retaining rings. Always wear safety goggles
when working with spring or tension loaded
fasteners or devices.
1. Using the large retaining ring pliers, remove the
Retaining Ring next to the Ball Bearing in the Motor
Body.

7
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 a piece 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.
2. 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 13).
ydraulic 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 14).
4. nspect the sealing area of the shaft for wear.
nspect other Shaft Assembly Components for wear
and replace if necessary.
5. While motor is completely disassembled, clean all
parts in a solvent bath.
Figure 13
2. nstall 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. nstall 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.
6. Once the seal has been expanded, remove the seal from the shaft.
7. nstall 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.
Note: f 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. nstall o-rings one at a time 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
Case-drain casting boss is present (with or without case drain port) only on
motors manufactured with “new” type hydraulic seal.
Assembly Instruction for New Seal-Type Motors
New Seal Type
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.
Note: To prevent damage to the seal lip extending out, use seal
spacer as shown to guard lip during assembly.
Fig. 1
Case-drain boss with or
without machined feature
Press
Seal Spacer
Seal
Cartridge
Figure 14

8
6. nstall new type seal with seal lip facing the large end of the
shaft. Slide the seal over the threaded end of the shaft and
gently push onto 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.
Note: f the seal lip is longer than the seal spacer’s width, please
stop the assembly and review parts being used.
7. Apply a small bead of sealant on outside of the
seal body as shown (Permatex® Form-A-Gasket® No. 2
or Permatex® Gasket Sealant & Dressing No. 09974).
8. dentify new type front spacer provided in kit used only on
old type motors. Discard old front spacer from the
disassembly. (New type front spacer looks like a thick washer
with a counter bore on one side, approx .164 inch thick).
9. nstall new type front spacer by locating the counter
bore side. Face this counter bore towards the seal, and slide
spacer onto small end of shaft until the counter bore fits
onto the seal body.
10. Finished shaft sub-assembly should look like this:
11. Do not press, but place the shaft sub-assembly into the motor
body with threaded end of shaft up, taking care not to dislodge
the front spacer out of its assembled place.
Assembly Instruction for Old Seal-Type Motors
Old Seal Type
Weep hole is present only on motors manufactured with “old” type
hydraulic seal.
1. nstall the large retaining ring onto large diameter end of shaft.
2. 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.
3. nstall new type seal spacer provided in kit. Discard old
spacer from the disassembly. (New type seal spacer
looks like a thick washer, approx .130 inch thick).
4. 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.
5. Once the seal has been expanded, remove the seal from the shaft.
Weep hole
Reassembly of Remaining ydraulic Motor Parts
1. Place Motor Body in a vise with large end of shaft facing
up.
2. nstall the o-ring in the body.
3. nstall the Roll Pin on the shaft. Place the nner 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.
2. nstall the new ball bearing onto the small diameter
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. nstall 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. nstall small retaining ring on shaft.
5. Check shaft rotation at this point. t should rotate
smoothly with only slight resistance from the seal lip
pressure on the shaft. f 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: f 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.

9
4. nstall the outer portion of the Gerotor, making sure the
Gerotor is centered within the o-ring groove on the
body.
5. nstall the Gerotor Housing, making sure the pins in
the Gerotor Housing line up with their respective holes
in the body.
6. Lightly lubricate the area between the nner 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. nstall 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. nstall 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. nstall 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. nstall the Washer and the Nut. nstall
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. nstall 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. nstall Motor into Pump Mounting Flange. nsert four
Hex Head Bolts; then alternately and evenly tighten
them.
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Troubleshooting

10
Typical ydraulic Circuit Schematics for ydraulic-Driven Pressure Washers
Figure 16
Typical ydraulic Circuit Schematics for ydraulic-Driven Pressure Washers

11
Mounting Dimensions
Figure 17
Mounting Dimensions

12
31
789
10
185
2
40 10
98
7
41 86
87
42
81 17
16
18
82
19 20
21
15
14
13
12
11
22
23
24
25
26
27
28
29
30
36 37
32
69
70
62
84
74
73
79
80
38
39
47
48
Models 1802C, 1803C, 1804C, 1805C, 1806C and 1807C Parts List
Figure 18
Replacement Pump Model 2257B-CX Exploded View for 1802C, 1803C, 1804C, and 1805C
Replacement Pump Model 2260B-CX Exploded View for 1806C and 1807C
Ref. No. Part No. Description Qty.
1 9910-680570 Socket Head Cap Screw 6
2 9910-620301 Plug 1
7 9910-1260162 Plug 6
819910-960160 O-ring 6
913400-0133 Valve 6
1019910-880830 O-ring 6
11 1830-0138 Support Ring 3
12 N/A Gasket 3
13 N/A Piston Guide 3
14 9910-1260420 O-ring 3
15 N/A Gasket 3
16 9910-1260460 Seal 3
17 9910-1320320 Plug 1
18 9910-1320360 O-ring 1
19 9910-1260790 Retaining Ring ( nternal) 1
20 9910-1320370 Bearing 1
21 9910-1320330 Bushing 1
22 9910-1320010 Pump Housing 1
23 9910-880130 Oil Plug 1
24 9910-1260110 Nut 3
2529910-1260100 Washer 3
2623500-0061 Piston 3
2729910-480480 O-ring 3
2829910-1260091 Spacer 3
29 9910-1260070 Guiding Piston 3
30 9910-1260080 Piston Pin 3
Ref. No. Part No. Description Qty.
31 9910-1260760 Socket Head Cap Screw 6
32 9910-1269101 Complete Cover 1
36 9910-1260060 Connecting Rod (Aluminum) 3
36 9910-1320140 Connecting Rod (Bronze) 1806C/1807C 1
37 9910-1260040 Gasket 1
38 9910-740290 O-ring 2
39 9910-1980740 Plug 2
40 0203-2250B Pump Head 1
41 9910-180101 O-ring 1
42 3312-0004 Thermal Relief Valve 1
47 9910-1260470 Screw 4
48 9910-1263890 Base 2
62 9910-480671 Seal 1
69 9910-1320050 Flange (Gas) 1
70 9910-1200430 Bolt 4
73 0551-2255 Hollow Shaft 5/8" Dia. 1
74 9910-1321190 Bearing 1
79 9910-780230 Washer 1
80 9910-780060 Socket Head Cap Screw 1
81 2220-0069 Socket Head Cap Screw 4
82 9910-1321420 Cover 1
84 9910-1321080 Snap Ring 1
85 9910-1381550 Washer 6
86 2400-0048 Elbow 1
87 2640-0005 Pressure Gauge 1
1Denotes Valve Kit item. 9910-K T1864
2Denotes Piston Kit item. 3430-0466

13
Models 1824C, 1825C, 1826C and 1827C Parts List
Ref. No. Part No. Description Qty.
1 9910-960160 O-ring 6
2 9910-1260162 Plug 6
313400-0133 Valve 6
419910-880830 O-ring 6
5 9910-620301 Plug 1
659910-1780140 Support Ring (only sold in kit) 3
749910-1260220 Gasket (only sold in kit) 3
8 9910-1780110 Piston Guide 3
9 9910-1780010 Pump Body 1
1039910-1266740 Cap (only sold in kit) 1
11 9910-1260790 Retaining Ring ( nternal) 1
12 9910-1780550 Retaining Ring (External) 1
13 9910-1780490 Bearing 1
14 9910-880130 Oil Cap 1
15 9910-1780050 Piston Pin 3
1639910-1780510 O-ring (only sold in kit) 1
17 9910-1200430 Socket Head Cap Screw 6
18 9910-1789010 Complete Cover 1
19 9910-1780040 Connecting Rod 3
20 9910-1780060 Guiding Piston 3
21 9910-480480 O-ring 3
22 9910-1260091 Spacer Disc 3
2329910-1780080 Piston (only sold in kit) 3
24 9910-1260100 Piston Washer 3
1Denotes Valve Kit item. 9910-K T1864
2Denotes Piston Kit item. 9910-K T2746
3Denotes Oil Seal Kit item. 9910-K T2787
4Denotes Water Seal Kit item. 9910-K T2747
5Denotes Support Ring Kit item. 9910-K T2745
Ref. No. Part No. Description Qty.
25 9910-1260110 Nut 3
26 9910-1380141 Base 2
27 9910-740290 O-ring 2
28 9910-1980740 Plug 2
29 9910-1260470 Screw 4
3039910-1260460 Seal 3
31 9910-1780120 Rear Piston Guide 3
3249910-770260 O-ring 3
3349910-1260450 Gasket (only sold in kit) 3
34 3312-0004 Thermal Relief Valve 1
35 9910-180101 O-ring 1
36 9910-1780020 Head 1
37 9910-1381550 Washer 8
38 9910-1322730 Socket Head Cap Screw 8
40 9910-1321190 Bearing 1
41 9910-1321080 Snap Ring 1
4239910-480671 Seal 1
62 9910-1780430 Bushing 1
63 9910-1780990 Hollow Shaft 1
64 9910-1780980 Gas Engine Flange 1
66 9910-180432 Bolt 4
67 2400-0048 Elbow 1
68 2640-0005 Pressure Gauge 1
Figure 19
Replacement Pump Model 9910-XMA4G20F37 Exploded View for 1824C, 1825C, 1826C and 1827C
2
1
3
4
5
2
4
3
1
38
37 35
34
68
67
6
78
333231 30
36
10 11
12
13 9
14
25
24
23
21
20
15
19
16
18 17
29 28
27
26
63
40
41
42
66
64
62

14
1Denotes Repair Kit item. Repair Kit No. 3430-0223
18
17
16
15
14
21
20
19
13
12
22
11
10
9
8
7
6
5
4
3
2
1
Figure 20
Injector/Unloader Seat and Seal Kit Items
Ref. No. Part No. Description Qty.
1 N/A Pressure Adjustment Nut
2 1900-0116 Main Spring 1
3 1900-0101 Spring Button 1
4 2404-0151 Plunger Retainer 1
5 N/A Plunger
611Sold in kit only Cup
7 N/A Sleeve
811Sold in kit only Cup
9 N/A Valve Body
10 N/A Bypass Poppet
11 N/A Bypass Seal/Outlet
12 1720-0004 O-ring 1
13 2404-0164 Bypass Adapter 1
14 1600-0041 Poppet Pin 1
1511Sold in kit only O-ring 1
16 N/A Check Valve Poppet
17 N/A Check Valve Spring
18 1830-0115 Poppet Retainer 1
19 1720-0004 O-ring 1
20 1720-0064 O-ring 1
21 2404-0164 Bypass Adapter 1
2211Sold in kit only O-ring 1
Unloader/Bypass Valve Model 3390-0086 (Models 1802C/1803C)

15
3390-0104/2B Unloader Assembly-Models 1804C/1805C, 1806C/1807C, 1824C/1825C, 1826C/1827C
Ref. No. Part No. Description Qty.
11Repair Kit tem Washer 1
21Repair Kit tem O-ring 1
311720-0186 O-ring 1
41Repair Kit tem O-ring 1
51Repair Kit tem Washer 1
611720-0196 O-ring 1
711720-0163 O-ring 1
813210-0080 Valve Seat 1
911720-0190 O-ring 1
1013320-0035 Piston 1
1111900-0161 Spring 1
121Repair Kit tem O-ring 1
131Repair Kit tem O-ring 1
14 9900-38FPB Quick Disconnect (Male End) 1
15 3430-0487 Bolt Kit Assembly (BSP) 1
Figure 21
Unloader Assembly Items
1
2
3
4
5
6
7
8
9
10
11
15 12
13
14
1Denotes Parts Kit items. Parts Kit No. 3430-0484

1Denotes Parts Kit item. Parts Kit No. 3430-0748
Ref. No. Part No. Description Qty.
16 1600-0044 Dowel Pin(Models 1802C/1803C, 1804C/1805C) 1
16 1600-0052 Dowel Pin (Models 1806C/1807C, 1824C/1825C, 1826C/1827C)1
17 3900-0022 Gerotor Assy (Models 1802C/1803C, 1804C/1805C) 1
17 3900-0024 Gerotor Assy (Models 1806C/1807C, 1824C/1825C, 1826C/1827C) 1
18 0700-2500C1 Gerotor Housing (Models 1802C/1803C, 1804C/1805C) 1
18 0702-2500C1 Gerotor Housing (Models 1806C/1807C, 1824C/1825C, 1826C/1827C) 1
19 0254-2500C2 Motor Endplate (Includes Main Bearing) 1
20 2270-0039 Washer 4
21 2220-0021 CAP SCREW (Models 1802C/1803C, 1804C/1805C) 4
21 2220-0032 CAP SCREW (Models 1806C/1807C, 1824C/1825C, 1826C/1827C) 4
22111720-0108 O-ring 1
23 3360-0021A Pressure Port Adapter 1
24111720-0262 O-ring 1
25 3320-0051A Tank Port Adapter 1
26111700-0047 Gasket 1
27112270-0027 Washer 1
28 2250-0038 Jam ut 1
29 3220-0029 Bypass Adjusting Screw 1
30 2500-0088C Motor Assy (Models 1802C/1803C, 1804C/1805C) 1
30 2500-0087C Motor Assy(Models 1806C/1807C, 1824C/1825C, 1826C/1827C) 1
Figure 22
Ref. No. Part No. Description Qty.
1 1820-0013 Retaining Ring (Int.) 1
2112000-0010 Ball Bearing 1
3 1410-0131 Front Cartridge (2010 & newer models) 1
3 1410-0073 Front Spacer (Models before 2010) 1
4111720-0268 O-ring(2010 & newer models) 2
4 ( ot used in Models before 2010)
5112104-0010 Oil Seal (Only sold in kit) 1
6 1410-0130 Spacer(2010 & newer models) 1
6 1410-0074 Seal Spacer (Models before 2010) 1
7 2029-0010 Thrust BearingRace 2
8 2029-0009 Thrust Bearing 1
9 1610-0012 Key 1
10 0530-2500 Shaft (Models 1802C/1803C, 1804C/1805C) 1
10 0532-2500 Shaft (Models 1806C/1807C, 1824C/1825C, 1826C/1827C) 1
11 1810-0026 Snap Ring 1
12 1610-0031 Key (Models 1802C/1803C, 1804C/1805C) 1
12 1610-0055 Key (Models 1806C/1807C, 1824C/1825C, 1826C/1827C) 1
13 0150-2500C Motor Body (Includes Main Bearing) 1
14111720-0110 O-ring 2
15 1600-0037 Dowel Pin (Models 1802C/1803C, 1804C/1805C) 1
15 1600-0068 Dowel Pin (Models 1806C/1807C, 1824C/1825C, 1826C/1827C)1
Model No. 2500-0087C and 2500-0088C ydraulic Motor Parts List
16

17
Ref. No. Part No. Description Qty.
1 2800-0023 Case (Right and Left) 1
2 N/A Trigger 1
3 N/A Pin 1
4 N/A Trigger Pin 1
5 N/A Trigger Wear Pin 1
6 N/A Body (3381-0018) 1
7 Repair Kit tem Plunger Sleeve 1
8 Repair Kit tem O-ring (Viton) 1
9 Repair Kit tem Plunger 1
10 Repair Kit tem O-ring (Viton) 1
11 Repair Kit tem Seal 1
12 Repair Kit tem Retainer 1
13 N/A Seat (3381-0018) 1
13 N/A Seat (3381-0018 Std.) 1
14 N/A O-ring 1
15 Repair Kit tem Ball 1
16 Repair Kit tem Spring 1
17 Repair Kit tem O-ring 1
18 Repair Kit tem Retainer 1
19 2270-0068 Seal (Washer) 2
20 N/A Tube ( nlet) 1
21 2404-0224 Tube (Adapter) 1
22 2200-0038 Screw 7
Figure 24
Gun Replacement Components
5
3
2
2
4
1
21
19
20
19
2
14
16
18
17
15
13
11
9
7
12
10
8
6
1
22
Repair Kit No. 3430-0398
4
3
2
Figure 23
Gun, Lance, and ose Replacement Components
1
Gun, Lance, Nozzle and ose Assembly Parts List
Gun Parts List

18
Notes

19
Notes

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
returnee 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 ypro 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 / PENTA R
Attention: Service Department
375 Fifth Avenue NW
New Brighton, MN 55112
For technical or application assistance, call the ypro Technical/Application number: 800-445-8360, or send an email to:
[e-mail]. To obtain service or warranty assistance, call the ypro Service and Warranty number: 800-468-3428;
or send a fax to the ypro Service and Warranty FAX: [phone].
*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.
Hypro (5/13)
Printed in USA
Limited Warranty on ypro/S URflo Agricultural Pumps & Accessories
375 Fifth Avenue NW •New Brighton, MN 55112 USA
Phone: [phone] •800-424-9776 •Fax: [phone]
www.hypropumps.com
Visit www.hypropumps.com/register today to register
your product and stay up-to-date on new products
and promotional offers.
The following information is required:
Model # _______________ Serial # _______________