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9302S-HM4C

Pentair 9302C-HM2C, 9302C-HMIC, 9303C-HMIC, 9302CT-GM1, 9302C-HM4C Installation, Operation, Repair And Parts Manual

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Series 9300 Hydraulically-Driven
Centrifugal Pumps
Installation, Operation, Repair and Parts Manual
Description
Form L-1526
(12/12, Rev. B)
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.
SERIES 9302C & 9302S
Cast Iron & Stainless Steel
Centrifugal Pumps
Max. Flow Rate: .............. 100 gpm
Max. Pressure: ...................120 psi
Ports: ....................1-1/4” NPT Inlet
.................................. 1” NPT Outlet
Hydraulic Ports: ...... 1/2” NPT Inlet
.................................3/4” 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
.................................3/4” NPT Tank
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
.................................3/4” NPT Tank
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
.................................3/4” 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
.................................3/4” 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
.................................3/4” 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
.................................3/4” NPT Tank
General Safety Information
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 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. Components not rated for use with Anhydrous Ammonia. 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. Do not pump at pressures higher than the maximum recommended pressure.
o
2. Maximum liquid temperature is 140 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.
F for Series 9300
Hazardous Substance Alert
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.
L-1526 (12/12, Rev. B)
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.
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Hydraulic Pumps
General Information—Hydraulic Systems
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 a constant pressure and flow. The output varies according to demand.
Open Center Spool Valve In Neutral Position
Figure 1
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.
Closed Center Spool Valve In Neutral Position
Gerotor-Type Hydraulic Motor
Figure 3
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.
Figure 2
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.
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.
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.
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L-1526 (12/12, Rev. B)
Plumbing Installation
7
6
Centrifugal Plumbing Hook-up
REF. DESCRIPTION NO.
1 Tank Lid
2 Vent Line #3430-0456 3 Jet Agitator 4 Shut-off Ball Valves 5 Centrifugal Pump 6 Spray Control Console 7 Centrifugal Pump Control 8 Manifold Boom Valve 9 Electromagnetic Flowmeter 10 Compact Jet Turret Nozzle Body
L-1526 (12/12, Rev. B)
-4-
Installation Instructions
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. To achieve 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 self­priming 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, a foot 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 off trapped 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, a visual 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 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
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L-1526 (12/12, Rev. B)
Plumbing Installation
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-off check 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 FLOAT position 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.
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.
L-1526 (12/12, Rev. B)
Operation
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-off valve 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.
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Closed Center (Pressure-Compensated) — HM2C and HM4C Models Only
On a pressure-compensated system, the amount of oil that is allowed to flow through the hydraulic motor is regulated by a metering 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-off valve.
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 5 through 7.
9. If a sufficient boom pressure still cannot be attained with the #2 size orifice, install the #3 size orifice and repeat Steps 5 through 7.
10. If a sufficient boom pressure still cannot be attained with the #3 size orifice, remove the orifice and repeat Steps 5 through 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. A protective 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.
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L-1526 (12/12, Rev. B)
Repair Instructions
Hypro Repair Tools:
Tool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
NOTE:
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)
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.]
Visit our website at
www.hypropumps.com
for video repair procedures,
under the Tools section.
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).
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
L-1526 (12/12, Rev. B)
Figure 7
Figure 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.]
-8-
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.
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.]
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.
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.
Figure 10
Figure 10a
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).
Figure 9
On Models 9305C-HM3C-SP, 9505C-HM3C-BS and 9305C-HM3C, install the washer on the shaft prior to installing the impeller nut.
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 apart
-9-
L-1526 (12/12, Rev. B)
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