HALE Silencer APS Series Installation and user guide

APS / APS -M / MBP / MBP -M
AP -M / MG -A / MG -M / TBP /
TBP-M
Manual p/n: 029-0020-83-0
Hale Products Inc. ◆ A Unit of IDEX Corporation
700 Spring Mill Avenue ◆ Conshohocken, PA 19428 U.S.A.
Telephone: [phone] ◆ FAX: [phone]
Web..........www.haleproducts.com
Installation, Operation and Service
Maintenance Manual

NOTICE !
Hale Products, Inc. (Hale) cannot assume responsibility for product failure result-
ing from improper maintenance or operation. Hale is responsible only to the limits
stated in the product warranty. Product specifications contained in this manual are
subject to change without notice.
All Hale products are quality components -- ruggedly designed, accurately
machined, precision inspected, carefully assembled and thoroughly tested. In
order to maintain the high quality of your unit, and to keep it in a ready condition, it
is important to follow the instructions on care and operation. Proper use and good
preventive maintenance will lengthen the life of your unit.
ALWAYS INCLUDE THE UNIT SERIAL NUMBER
IN YOUR CORRESPONDENCE.
ECO NO REV CHANGE FROM BY DATE APVD HALE PRODUCTS, INC.
A Unit of IDEX Corporation
Conshohocken, PA 19428 USA
05-019 A Initial Release LwH 01/20/2005 MAL
0336 B Pump Shaft Bearings LwH 03/15/2006 MAL
0438 C Model # Clarification LwH 09/29/2006 MAL
0534 D Update Mechanical Seal + LwH 03/08/2007 MAL
0856 E Add TBP ZLW 08/04/2009 MAL DRAWN BY LwH ISSUE DATE COPYRIGHT ©
NOT TO BE REPRODUCED OR USED TO
MAKE OTHER DRAWINGS OR MACHINERY.
CHECKED BY PRW 03/08/2007
Manual p/n: 029-0020-83-0, Rev. - E
Printed in U.S.A. ©Hale Products, Inc. 2007 All Rights Reserved

3
Silencer Series Booster Pump
p/n: 029-0020-83-0
Overview ❑
1 Hale “Silencer” Booster Pump
Hale Products, Inc. currently offers the “Silencer” Series Booster Pumps in
various models. For a model number description, see Table A-1: Booster
Pump Model Number Matrix.
❑APS / AP-* Series – Single-Stage, Centrifugal Attack Pump (250-500
GPM /1,000-2,000 LPM [1,363-2,726 LPS]) - three primary drive options:
truck transmission PTO, hydraulic drive (-H) or direct engine mount (-M).
❑MBP / MG -* Series – Single-Stage, Centrifugal, “High Volume” Attack
Pump (500-1,000 GPM /2,000-4,000 LPM [47.3-63.1 LPS]) - three pri-
mary drive options: truck transmission PTO, hydraulic drive (-H) or direct
engine mount (-M).
❑TBP - * Series – Two-Stage, Centrifugal, “High Volume / High Pressure”
Attack Pump (500-750 GPM / 1,893-2,893 LPM [21.5-47.3 LPS]) -- three
primary drive options: truck transmission PTO, hydraulic drive (-H) or
direct engine mount (-M).
The Hale line of booster pumps are the favorites of fire fighters throughout
the world. Booster pumps can be used as initial attack pumps or as auxil-
iary pumps in conjunction with the apparatus main pump. They offer the
versatility, dependability, reliability, ease of operation and reduced mainte-
nance that is so necessary to effective fire fighting. Hale booster pumps are
compact in size and lightweight for easy mounting. The apparatus builder
must supply the transmission PTO (power takeoff) and connecting shaft.
Hale offers various models of the silencer series booster pumps. The antic-
ipated use and position on the apparatus determines the model selected as

❑Overview
4Silencer Series Booster Pump
p/n: 029-0020-83-0
well as the drive unit.
Table A-1: Booster Pump Model Number Matrix

5
Silencer Series Booster Pump
p/n: 029-0020-83-0
Overview ❑
Figure B: Overview, Silencer Booster Pump
For shim installa-
tion, see Step Fig-
ure B: “Overview,
Silencer Booster

❑Overview
6Silencer Series Booster Pump
p/n: 029-0020-83-0

7
Section 1: Safety Precautions
Hale Products, Inc., August 2006, Rev-B
Safety ❑
1 Safety Precautions
IMPORTANT !
HALE PUMPS ARE DESIGNED FOR OPTIMUM SAFETY OF ITS OPERATORS.
FOR ADDED PROTECTION, PLEASE FOLLOW THE SAFETY GUIDELINES
LISTED IN THIS SECTION AND ADHERE TO ALL WARNING, DANGER, CAU-
TION AND IMPORTANT NOTES FOUND WITHIN THIS MANUAL.
ALL SUPPLIED DOCUMENTATION MUST BE CAREFULLY READ, UNDER-
STOOD AND ADHERED TO STRICTLY BY ALL INSTALLERS AND OPERATORS
BEFORE ATTEMPTING TO INSTALL OR OPERATE THE PUMP.
WHEN DEVELOPING DEPARTMENTAL APPARATUS OPERATING PROCE-
DURES, INCORPORATE THE WARNINGS AND CAUTIONS AS WRITTEN.
Hale is a registered trademark of Hale Products, Incorporated. All other brand and product
names are the trademarks of their respective holders.
1.1 DEFINITIONS
DANGER !
DANGER - Immediate hazard which WILL result in severe personal injury
or death if the warning is ignored.
WARNING !
WARNING - Hazards or unsafe practices which COULD result in severe
personal injury or death if the warning is ignored.
CAUTION !
CAUTION - Hazards or unsafe practices which COULD result in minor or
moderate personal injury if the warning is ignored.

❑Safety
8Section 1: Safety Precautions
Hale Products, Inc., August 2006 Rev-B
NOTICE !
NOTICE - Practices which could result in damage to the apparatus or other
property.
1.2 GUIDELINES
NOTICE !
THE PROCEDURES IN THIS MANUAL ARE GENERAL OPERATING PROCE-
DURES. THEY DO NOT REPLACE THE PROCEDURES, POLICIES OR GUIDE-
LINES ESTABLISHED BY THE AUTHORITY HAVING JURISDICTION, NOR DO
THEY REPLACE THE RECOMMENDATIONS AND PROCEDURES PROVIDED
IN THE APPARATUS MANUFACTURER'S MANUAL.
REFER TO THE PROCEDURES PROVIDED BY THE AUTHORITY HAVING
JURISDICTION ON SETTING WHEEL CHOCKS (TO PREVENT ANY MOVE-
MENT OF THE APPARATUS), AS WELL AS LAYOUT AND CONNECTION OF
HOSES, VALVES AND DRAIN COCKS.
ALL FASTENERS ON THE HALE PUMP AND GEARBOX ASSEMBLY ARE
SELECTED FOR THEIR APPLICATION. HALE PRODUCTS DOES NOT REC-
OMMEND REPLACING FASTENERS WITH ANYTHING OTHER THAN HALE
PART NUMBERS PROVIDED. REPLACING WITH A WEAKER ALTERNATIVE
POSES A SERIOUS SAFETY RISK.
ALL FASTENERS MUST BE INSTALLED WITH A LOCKING ANAEROBIC
ADHESIVE/SEALANT, SUCH AS LOCTITE®#242 OR EQUIVALENT.
❑Use care when removing the pump assembly from its packaging to pre-
vent personal injury and/or damage to the system.
❑Use all mounting bolt holes provided on the gearbox and/or the pump to
support the assembly. See the pump assembly plate drawing, located at
the back of this manual, for additional installation information.
❑Installation should be performed by a trained and qualified installer, such
as your authorized Hale representative. Be sure the installer has suffi-
cient knowledge, experience and the proper tools before attempting any
installation.
WARNING !
THE HALE PUMP AND GEARBOX ASSEMBLY CAN BE HEAVY AND BULKY.
ADDING ACCESSORIES TO THE SYSTEM ALSO INCREASES THE WEIGHT.
CHECK YOUR BILL OF LADING FOR THE APPROXIMATE WEIGHT.

9
Section 1: Safety Precautions
Hale Products, Inc., August 2006, Rev-B
Safety ❑
WARNING - continued !
BE CERTAIN TO USE PROPER LIFTING SUPPORT DEVICES (I.E., OVERHEAD
CRANE, JACKS, CHAINS, STRAPS, ETC.) CAPABLE OF HANDLING THE
LOAD WHEN REMOVING OR INSTALLING THE HALE PUMP AND GEARBOX
ASSEMBLY.
❑The installer is responsible for observing all instructions and safety pre-
cautions in his or her daily routine as dictated by regional safety ordi-
nances or departmental procedures.
❑Fluids -To meet various shipping regulations, oil is drained from the
gearbox reservoir prior to shipping from the factory.
At installation and before operation, oil must be added to the appropriate
levels. (See Section 4, heading “ Replace Gearbox Oil,” on page 59.)
See separate documentation provided with the engine and pump and
gearbox assemblies for proper fluids to use and quantities required.
❑DO NOT permanently remove or alter any protective feature, guard or
insulating devices, or attempt to operate the system when these guards
are removed.
Doing so voids the Hale pump warranty. Also see heading “Express
Warranty” on page 145.
❑Any of the above could affect system capacity and/or safe operation of
the system and is a serious safety violation which could cause personal
injury or could affect safe operation of the pump.
WARNING!
NO MODIFICATIONS MAY BE MADE TO THE HALE PUMP AND GEARBOX
ASSEMBLY WITHOUT PRIOR WRITTEN PERMISSION FROM:
Hale Products, Incorporated
Fire Suppression Division
700 Spring Mill Avenue
Conshohocken, PA 19428 U.S.A.
Telephone ..........[phone]
Fax.....................610-825-6440
Web....................www.haleproducts.com
❑Rotating drive line parts can cause injury. Be extremely careful that NO
part of your body (head, feet, arms, legs, fingers, hair, etc.) is in an area
of rotating parts where you could be subject to injury.

❑Safety
10 Section 1: Safety Precautions
Hale Products, Inc., August 2006 Rev-B
❑Make sure everyone is clear of the apparatus before shifting to the
PUMP position. Verify the parking brake is set and the wheels are
chocked to prevent any movement of the apparatus.
❑Make sure proper personal protective equipment is used when operating
or servicing the apparatus.
WARNING!
BE SURE TO WEAR SAFETY GLASSES WHEN REMOVING AND/OR INSTALL-
ING FORCE (PRESS) FITTED PARTS. WEAR PROTECTIVE, HEAT-RESIS-
TANT GLOVES WHEN HANDLING PARTS THAT REQUIRE HEATING FOR
INSTALLATION AND/OR REMOVAL. FAILURE TO COMPLY MAY RESULT IN
SERIOUS EYE OR HAND INJURY.
DO NOT OVERHEAT PARTS CONSTRUCTED OF BRONZE (E.G. IMPELLER).
OVERHEATING (PART TURNS RED OR BLUE) CAN WEAKEN THE PART AND
IT MUST THEN BE REPLACED.
❑DO NOT operate the system at pressures higher than the maximum
rated pressure. Always use the lowest possible relief valve settings to
enhance operator and equipment safety. Also see Section 2 “Introduc-
tion” on page 19 for additional information.
❑Relieve all system pressure, then drain all water from the system before
servicing any of its component parts.
❑Use only pipe, hose and fittings which are rated at or above the maxi-
mum pressure rating at which the water pump system operates.
❑Per NFPA 1962 requirements, large diameter hose, marked “supply
Hose 3-1/2” to 5” (89 - 127 mm) diameter” shall not be used at operating
pressures exceeding 185 PSI (13 BAR). Large diameter hose, marked
“Supply Hose 6” to 5” (152 mm) diameter” shall not be used at operating
pressures exceeding 135 PSI (9 BAR).
❑If leakage from the drain hole in the pump head is noticed or suspected,
the mechanical seal must be inspected and/or replaced.
❑If a pump is operated without water for extended periods, or without dis-
charging water, it could overheat. This can damage the mechanical seal,
impeller or the drive mechanism.
❑DO NOT attempt to pump until all the GREEN pump indicators in the cab
and panel are ON. Also see Section 3 “Basic Operation” on page 33 for
additional information.
❑DO NOT advance the throttle unless the OK TO PUMP indicator is ON.
Also see Section 3 “Basic Operation” on page 33 for additional
information.

11
Section 1: Safety Precautions
Hale Products, Inc., August 2006, Rev-B
Safety ❑
❑DO NOT leave the cab, after selecting the PUMP mode, until all the
GREEN pump indicators in the cab and panel are ON. Also see Section
3 “Basic Operation” on page 33 for additional information.
❑DO NOT attempt emergency manual shift procedures while the engine is
running. Also see Section 3 “Basic Operation” on page 33 for additional
information.
❑Never attempt to shift the pump (PUMP-to-ROAD, vise versa) while the
apparatus transmission is in gear. Always shift the transmission to NEU-
TRAL (N) and verify the speedometer is at ZERO (0) before shifting the
pump. Also see Section 3 “Basic Operation” on page 33 for additional
information.
❑DO NOT reduce the pressure on the INTAKE gauge below zero (0).
Serious damage to the water main could result.
❑Some vehicles maintain air on the shift cylinder continuously regardless
of transmission setting, and some only have air applied when the vehicle
transmission is in NEUTRAL.
Use caution when servicing.
❑Use only PAC-EASE Rubber Lubricant Emulsion (orequal) on the rubber
mechanical seal parts to ease installation. DO NOT use other lubricant
types as damage to the mechanical seal and seat could occur.
❑Before connecting any cord sets or wiring harnesses, inspect the seal
washer in the connector.
If the seal washer is missing or damaged, water can enter the connector
causing corrosion. This could resulting in possible system failure.

❑Safety
12 Section 1: Safety Precautions
Hale Products, Inc., August 2006 Rev-B
Notes
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13
Section 2: Introduction
Hale Products, Inc., May 2006, Rev-B
Introduction ❑
2 Introduction
2.1 PRINCIPLES OF OPERATION
Centrifugal Force
Hale pumps are centrifugal pumps that operate on the principle of centrifu-
gal force created by a rapidly spinning disk. (See Figure 2-1: “Centrifugal
Force - Rotating Disk.”)
As the disk rotates, it throws water from the center
toward the outer circumference of the disk. The
velocity at which the water travels directly relates to
the diameter of the disk and the speed of rotation.
When water is confined in a closed container, such
as the volute (pump body), the velocity of the water
is converted to pressure that rises to a level depen-
dent on the speed of rotation.
Three interrelatedfactors regulate the performance
of a centrifugal pump:
❑SPEED (RPM) If the speed of rotation
increases with flow held constant, fluid pressure
increases.
❑PRESSURE If pressure changes with speed held constant, the flow,
measured in gallons or liters per minute (GPM / LPM / LPS), changes
inversely; if pressure increases, flow decreases. Pressure is measured
in pounds per square inch (PSI) or BAR (MPa).
❑FLOW If the pressure is held constant, the flow increases with an
increase in the speed of rotation. Flow is measured in the number of gal-
lons of fluid per minute (GPM / LPM / LPS) that a pump can deliver when
supplied from draft.
A centrifugal pump has the ability to fully utilize any positive suction inlet
pressure, thus reducing the amount of work done by the pump.
For example, if the required discharge pressure is 120 PSI (8.3 BAR / 0.8
MPa) and the inlet pressure is 45 PSI (3.1 BAR / 0.3 MPa), the pump must
only produce the difference in pressure or 75 PSI (5.2 BAR / 0.5 MPa).
Figure 2-1: Centrifugal
Force - Rotating Disk

❑Introduction
14 Section 2: Introduction
Hale Products, Inc., May 2006, Rev-B
This contributes to improved performance with reduced maintenance.
Additionally, decreased maintenance is aided by centrifugal pumps having
few moving parts.
As the impeller rotates, the
water moving outward in the
impeller creates reduced pres-
sure, or a vacuum in the suc-
tion eye, allowing atmospheric
pressure to push water into
the pump impeller replacing
the water discharged. (See
Figure 2-2: “Pump Water Flow,
Cutwater.”)
Water enters the suction eye
of the impeller. The rotating
impeller vanes develop dis-
charge pressure and via the
“cutwater *,” directs the water
to the discharge opening.
* The “cutwater” is a wedge that
divides the water between the volute
(pump body) and the pump discharge.
Pump Stages
The number of pump stages is determined by the number of impellers on a
common shaft. The Hale series of single and two-stage pumps provide the
same normal operating and rating test pressures. The two-stage pump pro-
vides an additional level of operating pressures if required. See page ___
for single and two-stage pump ratings.
2.2 PUMP COMPONENTS
(See Figure 2-3: “Typical Pump and Gearbox Overview,” on page 15.)
The Hale single-stage pump consists of:
❑Volute (Pump Body)
❑Impeller and Clearance Ring
❑Mechanical Seal
Figure 2-2: Pump Water Flow, Cutwater

15
Section 2: Introduction
Hale Products, Inc., May 2006, Rev-B
Introduction ❑
❑Gearbox
❑Bearings
The Hale two-stage booster pump consists of the same major compo-
nents as the single-stage pump, with the addition of a few more:
❑Impeller (2) and Clearance Ring (3)
❑Transfer Valve
❑Check Valve
Volute, Pump Body
(See Figure 2-3: “Typical Pump and Gearbox Overview,” on page 15.)
Water discharging from the impeller enters the volute (pump body). The
volute is constructed from fine-grain cast iron and shaped so that its area
increases from the cutwater to its full capacity at the volute throat.
Note: Stainless Max pumps (volute and impeller) are constructed of corrosion
resistant stainless steel (Models SMM / SMD and SMR Series).
This gradual increase in
size maintains a con-
stant average velocity
through the volute.
The volute is a single
piece, and must be
removed to service the
impeller,clearancerings,
and mechanical seal.
Impeller
The impeller provides
velocity to the water.
Water enters the rotat-
ing impeller at the intake (or eye), and is confined by the shrouds and the
vanes to build pressure. The vanes guide water from the inlet to the dis-
charge and reduce the turbulence of the spinning water. Figure 2-4: “Impel-
ler Operation” traces a drop of water from the intake of the impeller to the
Figure 2-3: Typical Pump and Gearbox Overview

❑Introduction
16 Section 2: Introduction
Hale Products, Inc., May 2006, Rev-B
discharge outlet.
Figure 2-4: Impeller Operation
Clearance Rings
Clearance rings prevent pressurized water that is leaving the pump volute
from returning to the intake of the impeller.
They also prevent leakage, accomplished by limiting the radial clearance
between the spinning impeller and the stationary clearance ring. Also see
Figure 2-3: “Typical Pump and Gearbox Overview” on page 15.
Typically, a clearance ring has a radial clearance of about 0.0075” (0.191
mm) or between 0.015” to 0.020” (0.381-0.508 mm) per side. Clearance
rings are designed for replacement when wear limits cause the pump to
exceed NFPA standards for satisfactory performance.
Mechanical Seal
The “maintenance-free,” mechanical seal is common to Hale pumps. (See
Figure 2-5: “Typical Mechanical Seal Overview.”)

17
Section 2: Introduction
Hale Products, Inc., May 2006, Rev-B
Introduction ❑
The stationary
seat is in con-
stantcontactwith
a rotating seal
ring to prevent
leakage. The
sealing dia-
phragm is made
of a rubber elas-
tomerspecifically
designed for
high-tempera-
ture operations.
Note: Mechanical seals do not drip like other pump packing. A Hale pump with a
drip from the seal requires service.
WARNING !
IF A PUMP IS OPERATED WITHOUT WATER FOR EXTENDED PERIODS, OR
WITHOUT DISCHARGING WATER, IT COULD OVERHEAT. THIS CAN DAM-
AGE THE MECHANICAL SEAL OR THE DRIVE MECHANISM.
Ball and Tapered Bearings
Bearings support and align the impeller and input shafts for smooth opera-
tion. Anti-friction bearings are used and offer a major contribution to the life
of a pump.
When replacing bearings, it is important that you do not interchange bearing
manufacturer’s components. The bearing race and cone must always be
replaced in matching sets, as supplied by the manufacturer.
Transfer Valve
A transfer valve allows the operator of a two-stage pump to select between
volume and pressure operations, and is controlled from the apparatus pump
control panel. This valve is an all-bronze waterway device that can transfer
between pumping modes with a one-quarter turn of its control handle. The
position of the valve is indicated on ____ by ____. An optional air actuated
power transfer valve is also available.
Figure 2-5: Typical Mechanical Seal Overview

❑Introduction
18 Section 2: Introduction
Hale Products, Inc., May 2006, Rev-B
2.3 TWO-STAGE BOOSTER PUMPS
The Hale series of two-stage booster pumps provide the same normal oper-
ating and rating test pressures as the Hale series of single-stage pumps,
but the two-stage pump provides an additional level of operating pressures
if required.
Two-Stage Booster Pump Operation
The primary difference between a single-stage and a two-stage pump is
that the former has only one impeller and no transfer valve to switch
between volume and pressure operation. A transfer valve is a two-position
valve that permits the impellers in a two-stage pump to be operated in paral-
lel (volume) or series (pressure). Both types of operation are explained in
the following paragraphs.
Volume (Parallel) Operation.
Volume operation (figure ____), results in the pressure at the pump
intake being added to the prssure developed by both impellers and
and the amount of water delivered to the discharge. This is the sum of
the flows of the two impellers. For example, if the inlet pressure is 30
PSI (2 BAR) and the flow of each impeller is 500 GPM (1,892 LPM) at
150 PSI (10 BAR), the pressure and volume at the discharge is:
Flow/Impeller x (# Impellers)
500 GPM per Impeller X 2 Impellers = 1,000 GPM (1,892 LPM per
Impeller X 2 Impellers = 3,785 LPM)
30 PSI Inlet Pressure + 150 PSI Pump Pressure = 180 PSI (2 BAR
Inlet Pressure + 10 BAR Pump Pressure = 12 BAR)
Pressure (Series) Operation.
Pressure operation (figure ___), finds the impellers connected in
series. That is, the output of the impeller supplied from the pump
intake is supplied to the input of the next impeller. The pressure at the
pump discharge is the sum of the pressure of the two impellers plus
the pressure of the intake. The amount of water delivered to the dis-
charge is the same amount that entered the first impeller. Using the
example above when in series operation, the discharge pressure will

19
Section 2: Introduction
Hale Products, Inc., May 2006, Rev-B
Introduction ❑
be 330 PSI (22 BAR), and the discharge volume will be 500 GPM
(1,892 LPM).
Volume versus pressure operation:
Selection of volume or pressure is determined by three factors.
Generally, the pump should be operated so that the pump gives
the desired performance at the lowest engine speed.
Transfer volume (parallel) operation for higher flows (see figure
___).
Transfer to pressure (series) operation when higher water pres-
sures are required (see figure ___).
Choosing Between Volume and Pressure Operation
In deciding which range to pump (pressure or volume), choose the one that
gives the desired flow and pressure at the lowest engine speed. When a
change of range is desired, slow down to idle speed, and shift the transfer
valve to the desired range. When shifting the transfer valve from volume to
pressure operation, the pressure will be doubled. You may hear a metallic
click or two clicks, which will be the check valves closing. If the clicks sound
too harshly, you are changing the transfer valve while the pressure is to
high. This happens when the truck engine is running at high speed.
Refer to your fire department policy for when to use volume operation and
when to use pressure operations. If your fire department does not have a
policy to follow, here are general guidelines:
1. Hale pumps ar designed to pump up to 200 PSI (13 BAR) net
pressure in volume operation at reasonable engine speeds.
2. Generally, volume operation should be used at any net pump
pressure under 150 PSI (10 BAR), especially when pumping from
a hydrant.
3. When pumping from draft or a water tank, pressure operation may
be used when the volume is less than one-half the pump capacity
and when the desired pressure is over 150 PSI (10 BAR).
4. Be certain to warn everyone involved before changing pump
range.

❑Introduction
20 Section 2: Introduction
Hale Products, Inc., May 2006, Rev-B
Transferring Between Volume and Pressur Operation
Transferring between volume and pressure operation is evidenced by a
metallic click, which results from the check valves closing. If the click is too
loud or, perhaps, somewhat violent, the pumping pressure is too high for
switching. In this case, you should ease back on the engine throttle.
Switching between volume and pressure operation is generally governed by
prevailing fire department policy. However, there are some general guide-
lines if your fire department does not have an established policy:
1. The pump should be operated so that engine speed is within its
best operating range.
2. Transfer to volume (parallel) operation if the pump has to dis-
charge more than 50 percent of its rated capacity. Be certain to
warn everyone involved before switching between volume and
pressure operation.
3. Reduce the pump pressure to 50-60 PSI (3-4 BAR) before
switching. The engine speed should especially be reduced
when switching from volume to pressure operation with hand
held hoses in use.
2.4 PUMP DRIVES
Hale pumps produce the volumes and pressures shown on their perfor-
mance curves. However, maximum pump performance is sometimes lim-
ited by the power capacity and speed limits of the engine, transmission, and
PTO, as applicable. (See Figure 2-6: “Pump / Engine Rotation.”)
Three common pump drives are
used:
❑Split-shaft gearbox from the
apparatus drive shaft.
❑Operation from a Power Take-
Off (PTO) from the truck trans-
mission or drive train.
❑A stand-alone drive with sepa-
rate engine (auxiliary engine).
Note: Also see Plate #843A “Vehi-
cle Mounted Pump Applications”
located at the back of this manual.
Figure 2-6: Pump / Engine Rotation