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
Copyright 1997, Graco Inc. is registered to I.S. EN ISO 9001
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
Z
Y
X
W
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.
KK
GG
LL
HH
JJ
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
1
between the pump outlet (DD) and the pump inlet (CC).
See the WARNING above.
Fig. 3
DD
1
AA
1
BB
B
E
C
CC
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
KJ
M
P
L
MN
H
A
B
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)
U
H
E
A
G
Fig. 4
D
D
U
F
D
CD
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.
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.
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)
KL
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
E
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)
E
R
L
PQ S
H
L
K
K
M
T
E
D
U
B
J
C
PQ
M
J
T
H
G
D
U
F
R
E
S
E
H
K
E
HG
D D
U
U
F
A
DD
D
D
C
Fig. 5
C
A
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.
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 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
1
21
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
1
(25–30 ft–lb).
Fig. 6
01921B
18 308793
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