Graco 308793L User Manual

Instructions – Parts List

Parts

HIGH FLOR Pumps

Designed for low pressure, medium volume circulation of finishing materials

NOTES:

Stainless steel pumps are severe-duty and electropolished. Use with water-base coatings.

Refer to manual 307837 for adapter kits to mount the displacement pump to an existing motor.

308793L

This manual contains and compliant models. For a list of models with this compliancy, see pages 5 and 6.

Patent Pending

Read warnings and instructions.

See page 2 for table of contents. See pages 5 and 6 for list of models.

Senator Pump Shown

01921B

GRACO INC.ąP.O. BOX 1441ąMINNEAPOLIS, MNą55440-1441

Table of Contents

Symbols 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pump Models 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation

All Pumps 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Air-Powered Pumps 10. . . . . . . . . . . . . . . . . . . . . . . .

Hydraulic-Powered Pumps 12. . . . . . . . . . . . . . . . . . .

Operation

All Pumps 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Air-Powered Pumps 16. . . . . . . . . . . . . . . . . . . . . . . .

Hydraulic-Powered Pumps 17. . . . . . . . . . . . . . . . . . .

Maintenance 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshooting 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Service 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts

President Pumps 32. . . . . . . . . . . . . . . . . . . . . . . . . . .

Quiet Senator Pumps 34. . . . . . . . . . . . . . . . . . . . . . .

Quiet Bulldog Pumps 35. . . . . . . . . . . . . . . . . . . . . . .

Symbols

Viscount Pumps 36. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Carbon Steel Displacement Pumps 37. . . . . . . . . . .

Electropolished Stainless Steel

Displacement Pumps 39. . . . . . . . . . . . . . . . . . . . . . .

Electropolished Stainless Steel

Displacement Pumps, with bsp threads 41. . . . . . . .

Seal and Throat Packing Kits 45. . . . . . . . . . . . . . . . . . .

Conversion Kits 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Accessories 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Dimensions 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mounting Diagrams 48. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Technical Data and Performance Charts

President Pumps 50. . . . . . . . . . . . . . . . . . . . . . . . . . .

Senator Pumps 55. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bulldog Pumps 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Viscount Pumps 57. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Warranty 60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Graco Information 60. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Warning Symbol

WARNING

This symbol alerts you to the possibility of serious injury or death if you do not follow the instructions.

WARNING

PRESSURIZED EQUIPMENT HAZARD

Spray from the gun/valve, hose leaks, or ruptured components can splash fluid in the eyes or on the skin and cause serious injury.

D Do not point the gun/valve at anyone or at any part of the body.

D Do not stop or deflect leaks with your hand, body, glove or rag.

D Follow the Pressure Relief Procedure on page 15 whenever you: are instructed to relieve pres-

sure; stop spraying/dispensing; clean, check, or service the equipment; and install or clean the spray tip/nozzle.

Caution Symbol

CAUTION

This symbol alerts you to the possibility of damage to or destruction of equipment if you do not follow the instructions.

D Tighten all fluid connections before operating the equipment.

D Check the hoses, tubes, and couplings daily. Replace worn, damaged, or loose parts immediately.

2 308793

Permanently coupled hoses cannot be repaired; replace the entire hose.

INSTRUCTIONS

WARNING

EQUIPMENT MISUSE HAZARD

Equipment misuse can cause the equipment to rupture or malfunction and result in serious injury.

D This equipment is for professional use only.

D Read all instruction manuals, tags, and labels before operating the equipment.

D Use the equipment only for its intended purpose. If you are uncertain about usage, call your Graco

distributor.

D Do not alter or modify this equipment. Use only genuine Graco parts and accessories.

D Check equipment daily. Repair or replace worn or damaged parts immediately.

D Do not exceed the maximum working pressure stated on the equipment or in the Technical Data

for your equipment. Do not exceed the maximum working pressure of the lowest rated component in your system.

D Use fluids and solvents which are compatible with the equipment wetted parts. Refer to the Tech-

nical Data section of all equipment manuals. Read the fluid and solvent manufacturer’s warnings.

D Do not use hoses to pull equipment.

D Route hoses away from traffic areas, sharp edges, moving parts, and hot surfaces. Do not expose

Graco hoses to temperatures above 82_C (180_F) or below –40_C (–40_F).

D Wear hearing protection when operating this equipment.

D Do not lift pressurized equipment.

D Comply with all applicable local, state, and national fire, electrical, and safety regulations.

MOVING PARTS HAZARD

Moving parts, such as the air motor piston, can pinch or amputate your fingers.

D Keep clear of all moving parts when starting or operating the pump.

D Before servicing the equipment, follow the Pressure Relief Procedure on page 15 to prevent the

equipment from starting unexpectedly.

308793 3

WARNING

FIRE AND EXPLOSION HAZARD

Improper grounding, poor ventilation, open flames or sparks can cause a hazardous condition and result in a fire or explosion and serious injury.

D Ground the equipment and the object being sprayed. Refer to Grounding on page 7.

D If there is any static sparking or you feel an electric shock while using this equipment, stop spray-

ing/dispensing immediately. Do not use the equipment until you identify and correct the problem.

D Provide fresh air ventilation to avoid the buildup of flammable fumes from solvents or the fluid be-

ing sprayed/dispensed.

D Keep the spray/dispense area free of debris, including solvent, rags, and gasoline.

D Electrically disconnect all equipment in the spray/dispense area.

D Extinguish all open flames or pilot lights in the spray/dispense area.

D Do not smoke in the spray/dispense area.

D Do not turn on or off any light switch in the spray/dispense area while operating or if fumes are

present.

D Do not operate a gasoline engine in the spray/dispense area.

TOXIC FLUID HAZARD

Hazardous fluid or toxic fumes can cause serious injury or death if splashed in the eyes or on the skin, inhaled, or swallowed.

D Know the specific hazards of the fluid you are using.

D Store hazardous fluid in an approved container. Dispose of hazardous fluid according to all local,

state and national guidelines.

D Always wear protective eyewear, gloves, clothing and respirator as recommended by the fluid and

solvent manufacturer.

4 308793

Pump Models

PTFE

NOTE: These pumps are not suitable for metering. Contact your Graco distributor for more information.

CARBON STEEL MODELS

Maximum Air (or Hydraulic*) Working Pressure

Complete Pump Part No.

**220560, Series B 2:1 President (32) 239834, Series A (37) 1.2, 12 (180) 2.5, 25 (360)

**220561, Series B 3:1 President (32) 239833, Series A (37) 1.1, 11 (166) 3.4, 34 (500)

**239855, Series A 3:1 President, stubby

**237223, Series B 3:1 President,

**220565, Series B 3.5:1 Quiet Senator (34) 239834, Series A (37) 0.7, 7.0 (100) 2.4, 24 (350)

**220567, Series B 2.5:1 Quiet Senator (34) 239835, Series A (37) 0.7, 7.0 (100) 1.7, 17 (250)

**220577, Series B 4:1 Quiet Bulldog (35) 239835, Series A (37) 0.7, 7.0 (100) 2.8, 28 (400)

**236601, Series B Viscount I+ (36) 239833, Series A (37) 10.3, 103 (1500)* 3.1, 31 (450)

**236605, Series B Viscount I+ (36) 239834, Series A (37) 10.3, 103 (1500)* 2.1, 21 (300)

**236712, Series B Viscount I+ (36) 239835, Series A (37) 10.3, 103 (1500)* 1.5, 15 (225)

Ratio and Type (parts list page)

(32)

w/ packings (32)

Displacement Pump (parts list page) MPa, bar (psi) MPa, bar (psi)

239833, Series A (37) 1.1, 11 (166) 3.4, 34 (500)

239860, Series A (37) 1.1, 11 (166) 3.4, 34 (500)

Maximum Fluid Working Pressure

** This model is and compliant.

308793 5

Pump Models

PTFE

NOTE: These pumps are not suitable for metering. Contact your Graco distributor for more information.

SEVERE-DUTY ELECTROPOLISHED STAINLESS STEEL MODELS

Maximum Air (or Hydraulic*) Working Pressure

Complete Pump Part No.

**220562, Series C 1.5:1 President (32) 239838, Series B (39) 1.2, 12 (180) 1.9, 19 (270)

**220563, Series C 2:1 President (32) 239837, Series B (39) 1.2, 12 (180) 2.5, 25 (360)

**220564, Series C 3:1 President (32) 239836, Series B (39) 1.1, 11 (166) 3.4, 34 (500)

**239854, Series B 3:1 President, stubby (32) 239836, Series B (39) 1.1, 11 (166) 3.4, 34 (500)

**237222, Series C 3:1 President,

**220568, Series C 3.5:1 Quiet Senator (34) 239837, Series B (39) 0.7, 7.0 (100) 2.4, 24 (350)

**220570, Series C 2.5:1 Quiet Senator (34) 239838, Series B (39) 0.7, 7.0 (100) 1.7, 17 (250)

**220578, Series C 4:1 Quiet Bulldog (35) 239838, Series B (39) 0.7, 7.0 (100) 2.8, 28 (400)

**236602, Series C Viscount I+ (36) 239836, Series B (39) 10.3, 103 (1500)* 3.1, 31 (450)

**236606, Series C Viscount I+ (36) 239837, Series B (39) 10.3, 103 (1500)* 2.1, 21 (300)

**236713, Series C Viscount I+ (36) 239838, Series B (39) 10.3, 103 (1500)* 1.5, 15 (225)

244142, Series A Viscount I+ (36) 239859, Series B (39) 10.3, 103 (1500)* 3.1, 31 (450)

Ratio and Type (parts list page)

w/ packings (32)

Displacement Pump (parts list page) MPa, bar (psi) MPa, bar (psi)

239859, Series B (39) 1.1, 11 (166) 3.4, 34 (500)

Maximum Fluid Working Pressure

SEVERE-DUTY ELECTROPOLISHED STAINLESS STEEL MODELS,

WITH BSP THREADS

Maximum Air Working Pressure

Complete Pump Part No.

**240618, Series A 3:1 President (32) 240610, Series A, with

**240619, Series A 3:1 President (32) 240611, Series A, without

**240625, Series B 4:1 Quiet Bulldog (35) 240606, Series A, with

**240626, Series B 4:1 Quiet Bulldog (35) 240607, Series A, without

NOTE: High-Flo displacement pumps 240608 and 240612 (with tri-clamp adapters) and 240609 and 240613 (without tri-clamp adapters) are available as options. See page 43 for parts.

** This model is and compliant.

Ratio and Type (parts list page)

Displacement Pump (parts list page) MPa, bar (psi) MPa, bar (psi)

1.1, 11 (166) 3.4, 34 (500)

tri-clamp adapters (41)

1.1, 11 (166) 3.4, 34 (500)

tri-clamp adapters (41)

0.7, 7.0 (100) 2.8, 28 (400)

tri-clamp adapters (41)

0.7, 7.0 (100) 2.8, 28 (400)

tri-clamp adapters (41)

Maximum Fluid Working Pressure

6 308793

Installation (All Pumps)

Application

The High-Flo pump is designed for low pressure, medium volume circulation of finishing materials such as paints and stains.

Do not use this pump for flushing or purging lines with caustics, acids, abrasive line strippers, and other similar fluids.

Typical Installation

The Typical Installations shown in Figs. 4 and 5, and the following installation information are only guides. Proper sizing of the pump, accessories and lines is essential to get the maximum performance from your system. Contact your Graco distributor for assistance in designing a system to meet your needs.

Grounding

WARNING

Fig. 1

2. Air and fluid hoses: use only electrically conductive hoses.

3. Air compressor or hydraulic power supply: follow manufacturer’s recommendations.

4. Surge tank: use a ground wire and clamp. See Fig. 1.

5. Spray gun: ground through connection to a properly grounded fluid hose and pump.

0720

FIRE AND EXPLOSION HAZARD

Before operating the pump, ground the system as explained below. Also read the section FIRE AND EXPLOSION HAZARD on page 4.

1. Pump: use the ground wire and clamp. See Fig. 1. Loosen the grounding lug locknut (W) and washer (X). Insert one end of a 12 ga (1.5 mm@) minimum ground wire (Y) into the slot in lug (Z) and tighten the locknut securely. Connect the other end of the wire to a true earth ground. Order Part No. 237569 Ground Wire and Clamp.

6. Fluid supply container: follow your local code.

7. Object being sprayed: follow your local code.

8. Solvent pails used when flushing: follow your local code. Use only metal pails, which are conductive, placed on a grounded surface. Do not place the pail on a nonconductive surface, such as paper or cardboard, which interrupts the grounding continuity.

9. To maintain grounding continuity when flushing or relieving pressure, hold a metal part of the spray gun firmly to the side of a grounded metal pail, then trigger the gun.

308793 7

Installation (All Pumps)

Mount the Pump

This pump can be mounted on a floor stand, cart, wall bracket, or drum. The floor stand shown in Figs. 4 and 5 is Part. No. 220581.

Instructions for mounting the pump are supplied with the mounting accessory.

Plumbing

Most displacement pumps have a 1–1/2 in. npt(f) fluid inlet and a 1 in. npt(f) fluid outlet. Models 240606, 240607, 240608, 240609, 240610, 240611, 240612, and 240613, have a 1–1/2 in. bsp(f) fluid inlet and a 1–1/4 in. bsp(f) fluid outlet.

Use a minimum 25 mm (1 in.) diameter pipe or hose between the pump outlet and any supply line accessories. Use a minimum 38 mm (1–1/2 in.) diameter pipe or hose between the mix tanks and pump inlet.

Pumps With Tri-Clamp Adapters

Displacement Pumps 240606, 240608, 240610, and 240612 include tri-clamp adapters which allow sanitary pipe to be connected to the pump inlet and outlet. Refer to Fig. 2.

Install a 1–1/2 in. tri-clamp gasket (GG, not supplied) in the groove of the tri-clamp adapter (LL). Mate the tri-clamp adapter with the sanitary pipe and secure with two clamps (HH), bolts (JJ), and nuts (KK) (not supplied). Install the bolts in opposite directions.

When using a stainless steel pump, use stainless steel plumbing to maintain a corrosion-resistant system.

8689A

Fig. 2

8 308793

Installation (All Pumps)

Non-Circulating Systems

In non-circulating systems with a fluid outlet that can be closed off (causing the pump to stall), install a fluid pressure relief valve (AA) and a return line (BB) leading back to the fluid supply line (C). See Fig. 3.

WARNING

COMPONENT RUPTURE HAZARD

The pressure relief valve reduces the risk of the pump overpressurizing if the

piston seal is worn and leaking, and the fluid outlet is closed off. Install the valve so the arrow on its body matches the direction of fluid flow.

Do not install a fluid shutoff valve in the fluid line between the pump outlet (DD) and the pump inlet (CC). Doing so defeats the purpose of the pressure relief valve if the shutoff valve is closed, resulting in pump overpressurization. Overpressurization can cause the pump or components to rupture, resulting in serious injury and property damage.

Pressure Relief Valve (for non-circulating systems)

KEY

B Pump Stand C Fluid Supply Line; 38 mm (1–1/2 in.) minimum diameter D Fluid Shutoff Valve E Fluid Line; 25 mm (1 in.) minimum diameter AA External Pressure Relief Valve BB Fluid Return Line CC Pump Fluid Inlet DD Pump Fluid Outlet

Do not install a fluid shutoff valve in the fluid line

between the pump outlet (DD) and the pump inlet (CC). See the WARNING above.

Fig. 3

CDD 1

7656A

308793 9

Installation (Air-Powered Pumps)

Air Line to Motor

WARNING

A bleed-type master air valve (M) is required in your system, to help reduce the risk of serious injury including splashing fluid in the eyes or on the skin, and injury from moving parts if you are adjusting or repairing the pump.

The bleed-type master air valve relieves air trapped between this valve and the pump after the air is shut off. Trapped air can cause the pump to cycle unexpectedly. Locate the valve close to the pump. Order Part No. 113333.

1. The air line lubricator (N) automatically lubricates the air motor to prevent corrosion. See Fig. 4.

2. The bleed-type master air valve (M) relieves air trapped between itself and the motor, when the valve is closed. Install one valve close to the pump, downstream from the air regulator. Install a second bleed valve upstream from all other air line accessories, to isolate the accessories for servicing.

5. The air filter (K) removes harmful dirt and moisture from the compressed air supply.

6. The air supply line (J) must be large enough to supply the proper volume of air to the motor.

Fluid Line from Pump

WARNING

A fluid drain valve (U) is required in your system, to help reduce the risk of serious injury including splashing in the eyes or on the skin if the pump cycles unexpectedly.

Locate one valve downstream from the pump outlet and another valve downstream from the surge tank (G). These drain valves are used to relieve fluid pressure in the pump and surge tank during shutdown.

1. The surge tank (G) reduces fluid surging to prevent backflow into the pump. Mounting instructions are supplied with the tank.

3. The air regulator (L) controls pump speed.

4. The pump runaway valve (P) shuts off the air to the pump if the pump speed exceeds your pre-adjusted setting. Running a pump too fast can damage it.

2. The shutoff valves (D) before and after the surge tank, and between each mix tank and the pump fluid inlet, isolate these components for servicing.

3. Be sure the supply line (C) between the pump and mix tanks (A) is level.

10 308793

Installation (Air-Powered Pumps)

KEY

A Mix Tank B Pump Stand C Fluid Supply Line; 38 mm (1–1/2 in.)

minimum diameter

D Fluid Shutoff Valve

E Fluid Line; 25 mm (1 in.)

minimum diameter

F Surge Tank Stand G Surge Tank H Ground Wire (required;

see page 7 for installation)

J Air Supply Line K Airline Filter L Air Regulator and Gauge M Bleed-Type Master Air Valve (required) N Airline Lubricator P Pump Runaway Control Valve U Fluid Drain Valve (required)

Fig. 4

01923A

308793 11

Installation (Hydraulic-Powered Pumps)

Hydraulic Power Supply

CAUTION

The Hydraulic Power Supply must be kept clean at all times to avoid damage to the motor and hydraulic power supply.

1. Blow out hydraulic lines with air and flush thoroughly before connection to the motor.

2. Plug hydraulic inlets, outlets, and line ends when disconnecting them for any reason.

1. Be sure the power supply can provide sufficient power to the motor.

2. Be sure the power supply is equipped with a suction filter to the hydraulic pump.

Hydraulic Supply to Motor

Hydraulic Return from Motor

NOTE: The motor’s hydraulic outlet is 7/8 in., 37_

flare. Use a minimum 16 mm (5/8 in.) ID hydraulic return line (K).

1. The return line shutoff valve (R) isolates the motor when servicing the system.

CAUTION

To avoid damage to the pump, never use the return line shutoff valve to control the hydraulic flow. Do not install any flow control devices on the hydraulic return line.

2. The 10 micron size return filter (J) removes residue from the hydraulic fluid to help keep the system running smoothly.

Fluid Line from Pump

WARNING

NOTE: The motor’s hydraulic inlet is 3/4 in., 37_ flare.

Use a minimum 13 mm (1/2 in.) ID hydraulic supply line (L).

1. The supply line shutoff valve (S) isolates the motor when servicing the system. See Fig. 5.

2. The hydraulic fluid pressure gauge (Q) monitors the hydraulic oil pressure to the motor. This helps avoid overpressurizing the motor or displacement pump.

3. The pressure- and temperature-compensated flow control valve (T) prevents the motor from running too fast, which can damage it.

4. The pressure reducing valve (P) which has a drain line (M) running to the return line (K), controls the hydraulic pressure to the motor.

A fluid drain valve (U) is required in your system, to help reduce the risk of serious injury including splashing in the eyes or on the skin if the pump cycles unexpectedly.

1. The surge tank (G) reduces fluid surging to prevent backflow into the pump. Mounting instructions are supplied with the tank.

2. The shutoff valves (D) before and after the surge tank, and between each mix tank and the pump fluid inlet, isolate these components for servicing.

3. Be sure the supply line (C) between the pump and mix tanks (A) is level.

12 308793

Installation (Hydraulic-Powered Pumps)

KEY

A Mix Tank B Pump Stand C Fluid Supply Line;

38 mm (1–1/2 in.) minimum diameter

D Fluid Shutoff Valve

E Fluid Line; 25 mm (1 in.)

minimum diameter

F Surge Tank Stand G Surge Tank H Ground Wire (required; see

page 7 for installation)

J 10 Micron Return Filter K Hydraulic Return Line; 16 mm

(5/8 in.) minimum diameter

L Hydraulic Supply Line; 13 mm

(1/2 in.) minimum diameter

M Drain Line

P Pressure Reducing Valve Q Hydraulic Pressure Gauge R Return Line Shutoff Valve S Supply Line Shutoff Valve T Flow Control Valve U Fluid Drain Valve (required)

PQ S

G D

D D

Fig. 5

01924A

308793 13

Notes

14 308793

Operation (All Pumps)

Before You Start the Pump

Read and follow all instruction manuals, labels and tags supplied with this pump and with all the accessories you add to the system, before operating the system.

Flush the Pump Before First Use

The pump was tested in lightweight oil. If the oil will contaminate the fluid you are pumping, flush it out with a compatible solvent.

Pressure Relief Procedure

WARNING

PRESSURIZED EQUIPMENT HAZARD

The system pressure must be manually relieved to prevent the system from starting or spraying accidentally. To reduce the risk of an injury from accidental spray from the gun, splashing fluid, or moving parts, follow the Pressure Relief Proce- dure whenever you:

D are instructed to relieve the pressure, D stop spraying, D check or service any of the system equipment, D or install or clean the spray nozzle.

1. Shut off the power to the pump.

2. In an air-powered system, close the air regulator (L) and close the bleed-type master air valve (M).

3. In a hydraulic-powered system, close the hydraulic supply line shutoff valve (S) first, then the return line shutoff valve (R). In a multi-pump system, do this at each pump to isolate the pumps.

4. Close the fluid shutoff valves from the supply tanks.

5. Trigger the gun at the last gun station to relieve fluid pressure. Maintain firm metal-to-metal contact between the gun and a grounded waste pail. Repeat for all gun stations.

6. Open all drain valves (U) to relieve fluid pressure which may be trapped in the pump or hose.

If you suspect that pressure is not fully relieved after following the steps above, wrap a fitting near the pump outlet with a rag, and slowly and carefully loosen the fitting to relieve pressure. Be careful to protect your eyes from splashing.

308793 15

Operation (Air-Powered Pumps)

Starting and Adjusting the Pump

1. Charge the surge tank, if you are using one. See the separate instruction manual, 307707.

2. Open all fluid shutoff valves (D).

3. Open the dispensing valve/spray gun at the last gun station and keep it open while starting the pump.

4. Open the bleed-type master air valves (M).

5. Adjust the air regulator (L) to the minimum pressure necessary for the pump to cycle slowly.

6. When fluid is flowing smoothly from the gun, release the gun trigger.

7. One at a time, open any other guns in the system to purge air from the lines.

8. Adjust the pump runaway valve (P) according to the instructions supplied with it.

9. Adjust the lubricator (N) according to the instructions supplied with it.

NOTE: In a circulating system, the pump operates continuously until the power supply is shut off. In a direct supply system, the pump starts when the gun/ valve is opened, and stops when the gun/valve is closed.

WARNING

COMPONENT RUPTURE HAZARD

To reduce the risk of overpressurizing your system, which could cause component rupture and serious injury,

never exceed the specified maximum air input pressure to the pump (see Technical Data on

pages 50–56).

Shutdown

WARNING

To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 15.

Relieve the pressure.

16 308793

Operation (Hydraulic-Powered Pumps)

Starting and Adjusting the Pump

1. Charge the surge tank, if you are using one. See the separate instruction manual, 307707.

2. Open all fluid shutoff valves (D).

3. Turn on the hydraulic power supply.

4. Open the flow control valve (T) all the way.

5. Open the return line shutoff valve (R) first, then open the supply line shutoff valve (S).

6. Open the dispensing valve/spray gun at the last gun station and keep it open while starting the pump.

7. Adjust the pressure reducing valve (P) until you get the desired fluid pressure.

8. When fluid is flowing smoothly from the gun, release the gun trigger.

9. One at a time, open any other guns in the system to purge air from the lines.

10. With a gun triggered open (dead-end systems only) or with the pump running in a circulating system, count the cycle rate of the pump for one minute. Close the flow control valve (T) until the cycle rate drops to below the desired cycle rate.

12. Release the gun trigger.

WARNING

COMPONENT RUPTURE HAZARD

To reduce the risk of overpressurizing your system, which could cause component rupture and serious injury,

never exceed the specified maximum hydraulic input pressure to the pump (see Technical Data

on pages 57–59).

Shutdown

WARNING

To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 15.

11. Open the flow control valve (T) slowly until the cycle rate and fluid pressure return to the desired level. This method of setting the hydraulic controls ensures proper pump operation and prevents pump runaway and damage if the fluid supply runs dry.

Relieve the pressure.

Always shut off the supply line shutoff valve (S) first, and then the return line shutoff valve (R). This is to prevent overpressurizing the motor or its seals.

308793 17

Maintenance

Preventive Maintenance Schedule

The operating conditions of your particular system determine how often maintenance is required. Establish a preventive maintenance schedule by recording when and what kind of maintenance is needed, and then determine a regular schedule for checking your system. Your maintenance schedule should include the following:

Flushing

WARNING

FIRE AND EXPLOSION HAZARD Before flushing, read the section FIRE AND EXPLOSION HAZARD on page

4. Be sure the entire system and flushing pails are properly grounded. Refer to Grounding on page 7.

1. Flush before shutting down the system for an extended period of time.

2. Flush before repairing the pump, if possible.

Excessive Leaking at Throat

If you see excessive leaking at the throat, and tightening the packing nut does not help, replace the throat packings. See page 27.

Senator Pump

Shown

3. Flush before the fluid you are pumping can dry out, settle or set up in the pump and hoses.

Packing Nut Tightness

The packing nut (21) should be tight enough to stop leakage, but no tighter. Overtightening compresses and damages the packings, and may cause the pump to leak, reducing performance. See Fig. 6.

To check the adjustment of the packing nut, first relieve fluid pressure. If you have a torque wrench, tighten the packing nut to 34–40 NSm (25–30 ft–lb).

Torque to 34–40 NSm

(25–30 ft–lb).

Fig. 6

01921B

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