1.1. PPE ............................................................................................................................................ 1
The abbreviations used in this manual are limited to standard (commonly used and accepted)
scientific units of measure and therefore are NOT defined or listed. The acronyms used in this
manual are defined in this listing (in numerical-alphabetical order) and are NOT defined within
the text.
AKA Also Known As
AP Attack Pump
CBP Centrifugal Booster Pump
CCW Counter Clockwise
CW Clockwise
EVT Emergency Vehicle Technician
FAST Factory Authorized Service Team
GR Gear Ratio
ID Inside Diameter
Lpm Liters Per Minute
N/A Not Applicable
NFPA National Fire Protection Act
NFPA 1901 Standard For Automotive Fire Apparatus
NFPA 1911 Standard For The Inspection, Maintenance, Testing, And Retirement Of In-
This section provides definitions for DANGERS, WARNINGS, CAUTIONS, NOTICES, and NOTES
contained herein, precautions to be taken for pump repair as well as an alphabetical summary
listing of the DANGERS, WARNINGS, CAUTIONS, and NOTICES used in this manual.
DANGERS, WARNINGS, CAUTIONS, or NOTICES that immediately precede a step apply directly to
that step and all sub steps. DANGERS, WARNINGS, CAUTIONS, or NOTICES that precede an entire procedure apply to the entire procedure. WARNINGS and CAUTIONS consist of two parts: a
heading (that identifies possible result if disregarded) and a statement of the hazard (that provides the minimum precautions). The headings used and their definitions are.
INDICATES A HAZARDOUS SITUATION, WHICH IF NOT AVOIDED WILL RESULT IN SERIOUS INJURY OR DEATH.
INDICATES A HAZARDOUS SITUATION, WHICH IF NOT AVOIDED COULD RESULT IN
SERIOUS INJURY OR DEATH.
INDICATES A POTENTIALLY HAZARDOUS SITUATION, WHICH IF NOT AVOIDED MAY
RESULT IN MINOR OR MODERATE INJURY.
ADDRESSES PRACTICES NOT RELATED TO PERSONAL INJURY.
NOTE
Highlights an essential aspect of an operating or maintenance procedure, condition,
or statement and/or provides pertinent ancillary information.
NOTES may precede or follow the step or procedure, depending upon the information and how it
pertains to the procedure/step. The headings used and their definitions are.
1.1. PPE
The following is the minimum PPE required when performing maintenance.
• Safety Glasses • Work Shoes (Steel Toe)
• Safety Gloves • Ear Protection
• General Protection• Single Use
• Chemical Resistant• Ear Muffs
1.2. Environmental Protection
Used oil from the gearbox must be disposed of in accordance with your local regulations. It is
prohibited to pour oil and other contaminants onto the ground, down sewers, drains, or into water courses. Dispose of lubricants through authorized waste disposal contractors, licensed waste
disposal sites, or to the waste reclamation trade. If in doubt, contact your Local Environmental
Agency for advice regarding disposal policies.
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1.3. Training
AP, CBP, MBP, and RSD pumps must only be operated and maintained by trained personnel.
Training is available via the Hale Products Inc. website (www.haleproducts.com), Godiva √erified
Training (godiva.co.uk), or through your local dealer or vehicle manufacturer. The Hale website
provides a description of the course content and general information about the training, including an invitation to register with the EVT Certification Commission (www.evtcc.org) to take one
EVT exam at the Hale facility.
NOTE
Be sure to record the contact phone number and contact person’s information before
completing the form.
Complete the SESSIONS, ORGANIZATION CONTACT INFORMATION, STUDENT CONTACT INFORMATION portions of the form. Check the Captcha (provides the proof of human input) and then
click the SUBMIT button at the bottom of the page.
NOTE
Under the FAST buttons select No unless your facility is a FAST center. Do NOT click
Yes unless you know for sure you are a FAST member requiring certification or recertification (a certification is valid for 4 years).
When the Thank you for Registering page appears record the halemarketing email address (Add
this address to your email address book to prevent your response from being routed to the Junk
folder.) and call the contact phone number (recorded earlier) to arrange payment.
NOTE
Due to demand, classes fill far in advance of the scheduled dates. The ONLY way to
hold the selected dates is to pay at the time of enrollment submission.
1.4. Safety Summary
DO’S
• When installing or removing the pump, use ONLY appropriately rated lifting equipment that
has been inspected and is in good condition.
• Use/wear all required PPE when operating the pump (including for maintenance purposes).
See paragraph 1.1, PPE.
DON’TS
• Do NOT remove guards; rotating parts must be guarded against accidental contact.
• Do NOT insert items into the suction tube when pump is running.
• Do NOT disconnect discharge hoses while the unit is running.
• Do NOT loosen/unfasten/remove components while the unit is running.
The following warnings and cautions are used throughout this manual and are provided here as
a safety summary. WARNINGS or CAUTIONS within a procedure (preceding an individual step),
apply directly to that step, however WARNINGS or CAUTIONS that precede the entire procedure,
apply to the ENTIRE procedure.
2
A PRESS PRESENTS A POTENTIAL CRUSH HAZARD (FROM MOVING PARTS) AND/OR
STRIKE HAZARD (FROM EJECTED PARTS). WEAR APPROPRIATE PPE.
A PRESSURE HAZARD MAY EXIST EVEN WHEN THE PUMP IS NOT RUNNING. PRIOR
TO REMOVING HOSES OR CAPS FROM PUMP CONNECTIONS, RELIEVE PRESSURE BY
OPENING DRAINS. BLEEDER VALVES SHOULD ALSO BE USED WHEN CONNECTING
TO AN INTAKE FROM A PRESSURIZED SOURCE.
ALWAYS FOLLOW LOCAL GUIDELINES FROM THE AHJ AND THE APPARATUS MANUFACTURER.
ALWAYS FOLLOW PROPER OPERATING PROCEDURES. THE PUMP OPERATOR MUST
BE FAMILIAR WITH THE PUMP OPERATING INSTRUCTIONS AS WELL AS OTHER OPERATING GUIDELINES FOR THE APPARATUS AND ACCESSORIES.
DO NOT EXCEED OPERATING PRESSURE LIMITS OF PUMP, INSTALLED PLUMBING,
HOSE(S), OR EQUIPMENT IN USE.
DO NOT LEAVE THE CAB OR ATTEMPT TO PUMP UNTIL ALL OK TO PUMP LIGHTS IN
THE CAB ARE ILLUMINATED. SEE FIGURE 7.
OPERATORS, INSTALLERS, AND MAINTENANCE PERSONNEL MUST BE TRAINED AND
QUALIFIED FOR ALL THE ACTIVITIES THEY PERFORM.
ALWAYS USE PROPER PPE. OIL MAY BE TOXIC TO PEOPLE AND/OR THE ENVIRONMENT. CATCH AND DISPOSE OF OIL PROPERLY. IMPROPER OIL HANDLING MAY RESULT IN HEALTH RISKS AND/OR CRIMINAL PUNISHMENTS.
FAILING TO REDUCE SYSTEM PRESSURE BEFORE SYSTEM SHUTDOWN OR FLUSHING COULD RESULT IN WATER HAMMERING.
THE AP PUMP AND GEARBOX ASSEMBLIES WEIGH APPROXIMATELY 140 LBS
(64 KG). USE PROPER LIFTING DEVICE WHEN REMOVING OR INSTALLING THE PUMP
AND GEARBOX ASSEMBLY.
THE CBP PUMP AND GEARBOX ASSEMBLIES WEIGH APPROXIMATELY 100 LBS
(45 KG). USE PROPER LIFTING DEVICE WHEN REMOVING OR INSTALLING THE PUMP
AND GEARBOX ASSEMBLY.
THE MBP PUMP AND GEARBOX ASSEMBLIES WEIGH APPROXIMATELY 170 LBS
(77 KG). USE PROPER LIFTING DEVICE WHEN REMOVING OR INSTALLING THE PUMP
AND GEARBOX ASSEMBLY.
3
THE RSD PUMP AND GEARBOX ASSEMBLIES WEIGH APPROXIMATELY 225 LBS
(102 KG). USE PROPER LIFTING DEVICE WHEN REMOVING OR INSTALLING THE
PUMP AND GEARBOX ASSEMBLY.
USE PPE TO PROTECT HANDS AND FINGERS FROM SHARP EDGES. THE EDGES OF
THE BLADES ON THE INDUCER MAY BE SHARP.
A MECHANICAL SEAL IS A PRECISION ENGINEERED DEVICE. CARE MUST BE TAKEN
NOT TO DAMAGE THE MATING FACES (SEAL FORMING PORTION) OF THE SEAL. ENSURE THE FACES REMAIN ABSOLUTELY CLEAN THROUGHOUT THE ENTIRE INSTALLATION. SEAL FACES MUST BE CLEANED WITH THE ALCOHOL WIPES PROVIDED WITH
THE REPAIR KIT.
ALWAYS INSTALL NEW BEARINGS WHEN INSTALLING THE PUMP GEAR OR PUMP
SHAFT (ESPECIALLY IF METAL WAS FOUND IN THE GEAR OIL). FAILURE TO INSTALL
NEW BEARINGS MAY RESULT IN PREMATURE PUMP FAILURE OR ADDITIONAL
EQUIPMENT DAMAGE.
ALWAYS USE AND ONLY USE PAC-EASE RUBBER LUBRICANT EMULSION (OR EQUIVALENT) WHEN INSTALLING THE MECHANICAL SEAL. USING ANY OTHER LUBRICANT OR
NOT USING THE LUBRICANT MAY DAMAGE THE MECHANICAL SEAL AND SEAT.
DO NOT ALLOW PUMP GEAR TO SLIDE THRU SUPPORTS. DO NOT ALLOW THE NEW
OIL SEAL TO BE CUT ON THE KEYWAY OR PINCHED BETWEEN THE ADJACENT PUMP
SHAFT COMPONENTS OR BE DAMAGED IN ANY OTHER WAY. DAMAGING THE OIL
SEAL WILL RESULT IN AN OIL LEAK AND POSSIBLE EQUIPMENT DAMAGE AND/OR
FAILURE.
DO NOT ALLOW THE PRESSURE ON THE INTAKE GAUGE TO GO BELOW ZERO. PLACING A VACUUM ON THE WATER MAIN MAY RESULT IN SERIOUS DAMAGE TO OR FAILURE OF THE WATER MAIN.
DO NOT APPLY LOCTITE TO A SELF-LOCKING NUT. DO NOT REUSE A SELF-LOCKING
NUT. REUSING A SELF-LOCKING NUT OR ADDING LOCTITE MAY RESULT IN THE ITEM
FAILING TO BE SECURED.
DO NOT CUT THRU THE CLEARANCE RING. CUTTING THRU THE CLEARANCE RING
WILL DAMAGE THE PUMP HEAD/SUCTION HEAD/VOLUTE AND MAY RESULT IN PUMP
FAILURE.
4
DO NOT DRIVE THE CLEARANCE RING INTO THE /SUCTION HEAD/VOLUTE AT AN ANGLE OR UNEVENLY (ALL THE WAY FROM ONE SIDE AT A TIME). BENDING, WARPING,
OR CHIPPING THE CLEARANCE RING MAY RESULT IN POOR PERFORMANCE OR PUMP
FAILURE.
DO NOT INSTALL A USED COTTER PIN. A USED PIN MAY FAIL RESULTING IN DEBRIS
GOING THRU THE PUMP AND/OR LOOSENING OF THE CASTLE NUT THAT SECURES
THE IMPELLER.
DO NOT LOOSEN THE CASTLE NUT TO INSTALL THE COTTER PIN. CONTINUE TO
TIGHTEN THE CASTLE NUT UNTIL THE COTTER PIN CAN BE PUSHED THRU THE HOLE
IN PUMP SHAFT.
DO NOT LUBRICATE VANES OR VANE SLOTS. USING LUBRICANT ON THE VANES OR
VANE SLOTS DURING DISASSEMBLY, CLEANING, OR ASSEMBLY EVENTUALLY CAUSES A GUMMY RESIDUE TO DEVELOP, RENDERING THE SYSTEM INOPERATIVE.
DO NOT OPEN THE THROTTLE UNLESS THE OK TO PUMP (GREEN INDICATOR LIGHT)
IS ON. SEE FIGURE 8. FAILURE TO WAIT FOR THE ILLUMINATED GREEN INDICATOR
MAY RESULT IN EQUIPMENT DAMAGE OR FAILURE.
DO NOT OVER FILL THE GEARBOX. EXCEEDING THE OIL LEVEL MAY RESULT IN
EQUIPMENT DAMAGE.
DO NOT RUN THE PRIMER FOR MORE THAN 45 SECONDS IF PRIME IS NOT
ACHIEVED. IF PRIME IS NOT ACHIEVED IN 45 SECONDS, STOP AND LOOK FOR CAUSES (AIR LEAKS OR BLOCKED SUCTION HOSE). RUNNING THE PRIMER FOR LONGER
PERIODS WITHOUT ACHIEVING PRIME MAY RESULT IN PRIMER AND/OR PUMP DAMAGE OR FAILURE.
DO NOT STRIKE THE IMPELLER. STRIKING THE IMPELLER MAY RESULT IN IRREPARABLE DAMAGE.
DO NOT STRIKE THE INDUCER OR IMPELLER. STRIKING THE INDUCER OR IMPELLER
MAY RESULT IN IRREPARABLE DAMAGE.
DO NOT USE GREASE DURING GEARBOX/PUMP SHAFT ASSEMBLY. IN ALL OTHER
CASES IT IS ACCEPTED PRACTICE TO HOLD COMPONENTS IN PLACE OR LUBRICATE
THEM FOR EASE OF ASSEMBLY USING GREASE, HOWEVER DURING GEARBOX/PUMP
SHAFT ASSEMBLY USE ONLY GEAR OIL. GREASE IS NOT COMPATIBLE WITH THE
SYNTHETIC GEAR OIL AND MAY CAUSE DRAIN HOLES TO CLOG PREVENTING CRITICAL LUBRICATION.
5
IF A PUMP IS OPERATED WITHOUT WATER, OR WITHOUT DISCHARGING WATER, IT
MAY OVERHEAT. FAILURE TO FLOW WATER MAY DAMAGE THE MECHANICAL SEAL OR
THE DRIVE MECHANISM.
IF IN 30 TO 45 SECONDS ONE OF THE FOLLOWING (BULLETS) DOES NOT OCCUR
STOP THE PUMP AND CHECK FOR AIR LEAKS OR A POSSIBLE PUMP TROUBLE.
• THE DISCHARGE GAUGE READING INCREASES
• THE INTAKE GAUGE READING FALLS BELOW ZERO
• THE PRIMING PUMP DISCHARGES WATER TO THE GROUND
CONTINUING TO RUN THE PRIMING PUMP MAY RESULT IN PUMP FAILURE OR DAMAGE.
OIL AND GREASE (INCLUDING SKIN OILS) WILL DAMAGE THE MECHANICAL SEAL
FACE. NEVER TOUCH THE MATING FACES OF THE MECHANICAL SEAL. WEAR PROTECTIVE GLOVES TO PREVENT TOUCHING THE SEAL FACES WITH YOUR BARE HANDS.
(USE RUBBER, ACRYLIC, LATEX, ETC. – DO NOT USE CLOTH OR LEATHER.)
RUNNING THE ENGINE AT SPEEDS HIGHER THAN 1200 RPM DURING PRIMING IS
NOT RECOMMENDED SINCE IT WILL NOT IMPROVE PRIMING OPERATION AND MAY
CAUSE DAMAGE TO THE PUMP.
USE ONLY PAC-EASE RUBBER LUBRICANT EMULSION (OR EQUIVALENT) ON THE
RUBBER MECHANICAL SEAL PARTS TO EASE INSTALLATION. USING ANY OTHER LUBRICANT CAN DAMAGE THE SEAL AND SEAT.
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2. INTRODUCTION
This section provides an overview of the Flex series pumps, drives, and their options. Additionally, the section provides how to use this manual and principles of operation (including an explanation of terms and standard components).
2.1. Overview
Hale Products currently produces four models of booster pumps:
• AP• MBP
• CBP • RSD
Unless otherwise indicated, these procedures will apply to all models of Hale booster pumps: Any
variations in operation or maintenance for the different models will be addressed within the context of this manual. The AP, CBP, and MBP booster pump maintenance technics are similar and
are therefore grouped in this manual. The RSD booster pump maintenance technics differ significantly and are presented separate from the AP, CBP, and MBP booster pumps.
Hale booster pumps are the favorite of fire fighters throughout the world. Booster pumps can be
used as initial attack pumps or as auxiliary pumps in conjunction with the apparatus main pump.
Covering a range of capacities from 20 gpm (75 Lpm) to 1500 gpm (5,678 Lpm), Hale booster
pumps offer the versatility, dependability, reliability, small size, and ease of operation so necessary for effective firefighting.
Hale booster pumps are of a compact size and lightweight design for easy mounting on the apparatus chassis. The pump coupled with the new aluminum gearbox allows the apparatus builder to
only supply the PTO and connecting shaft or direct engine mount a Flex series single stage
booster pump.
2.2. How To Use This Manual
This manual was developed for the purposes of FAST team and OEM support. This manual provides information and procedures to perform three levels of pump maintenance and impeller
renewal. The manual also provides information to be used to troubleshoot and R&R failed components based on the three levels of repair and impeller renew kits available from Hale Products
Inc. The repair/impeller renew kits support pump maintenance, repair, and rebuild.
This manual requires the use of the both the Hale Assembly drawings and the Parts Manual For
Hale Single Stage Booster Pumps (FSG–MNL–00185) for parts identification. Use the Parts
Manual to determine the drawing sheet (or sheets) required for reference. Then use the drawing(s) to locate the part and the item number associated with that part. The item number also
appears listed (in numerical order) in the parts table along with the part number, description, and
quantity for that item number.
The Introduction section is of interest to management for pump familiarization, visual recognition, pump identification documentation, and risk assessment information.
The Safety section is of interest to both management and maintainers as it provides precautions
for maintenance (including operation for maintenance purposes) and definitions of warnings,
cautions, and notes. This section also provides a summary of both PPE and a DANGER/ WARNING/CAUTION/NOTICE summary. The section provides a single point view of compiled hazards
and PPE in a condensed format. The appropriate DANGER, WARNING, CAUTION, or NOTICE and
PPE list also appears at each point of use throughout the manual.
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The two Maintenance sections provide all aspects of maintaining the AP, CBP, MBP, and RSD
pumps, including sparing, preventive and corrective maintenance (which includes troubleshooting and remove and replace instructions). Notice that the use of this manual also requires
maintenance personnel to have received Hale training prior to using it. Use Hale Training Academy (Pumping And Maintenance) training (see paragraph 1.3, Training) and the two Maintenance
sections for all aspects of maintaining the pumps.
Within the two Maintenance sections, the troubleshooting provided utilizes SCR tables which
provide the list of known symptoms associated with a pump trouble/problem/failure. To use a
SCR table, locate the indicated SYMPTOM, verify the associated CAUSE (the maintainer must verify ALL the associated causes if multiple causes are listed) and then perform the associated
REMEDY (or remedies). The R&R procedures provide pump removal from the apparatus via two
separate methods: removing a pump as a complete assembly or removing only the pump portion
leaving the gearbox in the apparatus. Once removed the subsequent pump or gearbox repairs
are treated as bench procedures each covering a specific level (1, 2, 3, or renewal) of maintenance. Each level of maintenance requires the associated repair kit be utilized. Utilizing the associated repair kit ensures all the required components are available for replacement. Utilizing
the repair kits as intended prolongs pump performance and supports the manufacturer’s warranty.
Performing a procedure is NOT the ONLY key action in maintaining a pump, documentation of the
pumps Preventive Maintenance, R&R, and SYMPTOM/REMEDY history (including meaningful
tracking of when each issue occurred) is also key to maintaining each pump. A maintenance log
with meaningful entries will provide invaluable insight, time/money savings (in reduced down
time and shorted troubleshooting time), and cost savings over the life cycle of each pump.
2.3. Pump Specifications And Numbering
Hales policy is one of continuous development. Hale therefore reserves the right to amend specifications without notice or obligation. Refer to Section 2.2, Pump Specifications And Numbering,
in the Hale OIM manual (FSG–MNL–00183) for serial number locations, model number definitions, and major pump features. Refer to the Hale Products website (www.haleproducts.com) for
detailed booster pump specifications. NOTE: Using your pumps serial number and the Hale website (or Customer Service) is the best way to ensure you receive/utilize the correct replacement
parts for your pump.
2.4. Principles Of Operation
Hale booster pumps are centrifugal pumps that operate on the principle that centrifugal force is
created by a rapidly spinning disk. Figure 1 shows an amount of water has been placed at the
center of a disk. The disk is rotated and the water is thrown outward from the center to the edge
of the disk. The velocity at which the water travels from the center 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), the velocity is converted to pressure; pressure is therefore, dependent on the speed of
rotation.
8
Figure 1. Centrifugal Force From A Rotating Disk
There are three interrelated factors that regulate the performance of a centrifugal pump:
Speed (RPM):
If the speed of rotation increases with the flow held constant, the water pressure increases.
Pressure:
Pressure is usually expressed in psi or bar. If pressure changes and speed is constant, the flow
will change inversely (if pressure increases, flow decreases).
Flow:
Flow is usually expressed in gpm or Lpm that a pump can deliver when supplied from draft. If the
pressure is held constant, the flow will increase with an increase in the speed of rotation.
The centrifugal pump is preferred by the fire protection service due to its ability to fully utilize any
positive inlet pressure, reducing the strain on the pump.
For example, if the required discharge pressure is 120 psi (8 bar), and the inlet pressure is
45 psi (3 bar), the pump must only produce the difference in pressure of 75 psi (5 bar). This contributes to low engine and pump speeds which reduces wear on the pump. Another important
benefit is the centrifugal pump has basically only two moving parts; the impeller and the shaft.
As shown on Figure 2, during operation water enters the suction eye of the impeller (intake). The
rotating impeller vanes develop discharge pressure and direct the water to the discharge opening. The cutwater is a wedge that divides the water between the volute (a single chamber diffuser) and the pump discharge.
Figure 2. Single Stage Water Flow
2.4.1 Explanation Of Terms
The following major terms are explained in sufficient detail to allow a maintainer to communicate
pumping issues or troubles with Hale Customer Service personnel. As a basic understanding of
the terms (and the principles associated with them) will assist operators (for both operations and
maintenance purposes) utilize common terminology and understand accepted principles when
communicating among each other.
2.4.1.1 Atmospheric Pressure (Static Air Pressure)
Air pressure is 14 pounds (AKA psi) at sea level. Pressure increases below sea level and decreases above sea level due to the increased or decreased volume of air pushing down at that
height. In addition to the amount of air, weather also effects air pressure. Air in a high pressure
9
area compresses and warms as it descends. The warming inhibits the formation of clouds,
meaning the sky is normally sunny in high pressure areas. But haze and fog still might form. Just
the opposite occurs within an area of low atmospheric pressure. Atmospheric pressure affects a
pumps ability to pump from draft. Higher pressures will increase a pumps performance, while
lower pressures can cause a noticeable decrease in lift.
2.4.1.2 Cavitation
The definition of cavitation is the formation of empty cavities (low-pressure bubbles) in a liquid
being moved by means of mechanical force (such as the rotation of an impeller) which is then
followed by their immediate and sudden implosion. The resulting forces can be as damaging as
striking the metal with a hammer. Cavitation within a pump may sound as if the pump were filled
with gravel or being struck with a hammer. See Section 3.5, Cavitation (Details), for more details.
2.4.1.3 Dead Heading
Operating a pump without any discharge is known as dead heading. Lack of flow causes temperatures to rise inside the pump.
2.4.1.4 Impeller And Clearance Rings
The impeller is the primary working part of a centrifugal pump. The impeller moves the water. An
impeller consists of two discs surrounding curved vanes. The vanes force water to rotate within
the discs resulting in the water being thrown outward at high velocity. The water from the impeller discharges into the volute, converting the high velocity energy into pressure.
The clearance rings minimizes the amount of water that bypasses the discharge and returns to
the suction side of the impeller reducing pump performance (gpm). The wrap around clearance
ring reduces the bypass even more than the typical style ring (see Figure 3). Clearance rings are
ware items that protect the volute from experiencing the ware generated by the moving water
and especially the debris (sand, salt, etc.) when present.
Figure 3. Clearance Ring Water Flow
2.4.1.5 Priming Pump
An auxiliary pump attached to provide positive displacement of air out of the booster pump creating a vacuum which initially draws water into the pump. The type of priming pump used (by Hale)
for the AP, CBP, MBP, and RSD pumps is an electric motor driven rotary vane pump. Once the
main pump is primed and pumping, the priming pump is turned off.
2.4.1.6 Relief Valve
An automated valve with a control mechanism that maintains the pump pressure within 30 psi
when the pump discharge is gated (reduced) or closed (off). The valve maintains a set pressure
by diverting a portion of the pump discharge flow into the pump suction.
10
2.4.1.7 PM Relief Valve Control
The PM indicates a panel mounted hand-adjustable valve. When set to the desired pressure, the
relief valve will maintain the desired pump discharge pressure and limit a pressure increase to
no more than 30 psi (2 bar).
2.4.1.8 Volute
The increasing discharge path of the pump, its function is to collect the water from the impeller
and depending on its design can either increase pressure and decrease velocity or increase velocity and decrease pressure.
2.4.2 Standard Booster Pump Components
All Hale Flex Series single stage booster pumps (AKA the standard pump) consist of the following:
• Volute• Gearbox
• Impeller • Gears (Drive, Mating/Pump)
• Mechanical Seal• Shaft Assemblies (Input, Pump)
Figure 3 shows these standard parts of a Hale booster pump. These parts are briefly described in
the following paragraphs.
Figure 4. Parts Of The Hale Booster Pump
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2.4.2.1 Volute
The Hale AP, CBP, and MBP single stage booster volutes (body) are a single-piece casting. Service of the impeller, clearance rings, and mechanical seal is accomplished by removing the volute from the assembled pump head and gearbox. The Hale RSD single stage booster volute is a
three-piece casting, with service of the impeller, clearance rings, and mechanical seal accomplished by removing ONLY the appropriate piece of the volute required to access the component
requiring service.
All volutes are constructed from fine grain cast iron. For areas where salt water is commonly
used, a bronze version of each booster pump is available.
The Hale Flex Series single stage booster pumps support multiple discharge port configurations.
Depending on the model, the pumps provide between 12 and 24 different configurations (including both rotations – ER or OER). Refer to the Parts Manual For Hale Single Stage Booster Pumps
(FSG–MNL–00185), Section 2,
charge Positions paragraphs) for a reference to the appropriate drawing and sheet number(s)
providing the views of the volute positions.
2.4.2.2 Impeller And Shaft Assembly
The impeller provides velocity to the water. The impeller is made of high quality bronze and is
mounted on a stainless steel shaft that is rotated by the gearbox. Water enters the rotating impeller at the intake (or eye). The vanes guide water from the intake to the discharge. Vanes curve
away from the direction of rotation so water moves toward the outer edge (see Figure 2). The
shrouds (discs) form the sides of the impeller and keep the water confined to increase acceleration and pressure. The back of the impeller houses the rotating portion of the mechanical seal.
Hale Booster Pump Illustrated Breakdowns, (Gearbox And Dis-
2.4.2.3 Mechanical Seal
The mechanical seal is common to all Hale booster pumps. Figure 4 shows a stationary seat is in
constant contact with a rotating seal ring to prevent leakage. The seal ring/diaphragm is specifically designed for high-temperature, low friction, self-adjusting, dependable operations.
Figure 5. Mechanical Seal
IF A PUMP IS OPERATED WITHOUT WATER, OR WITHOUT DISCHARGING WATER, IT
MAY OVERHEAT. FAILURE TO FLOW WATER MAY DAMAGE THE MECHANICAL SEAL OR
THE DRIVE MECHANISM.
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2.4.2.4 Gearbox
The gearbox is cast aluminum and machine finished. The gearbox can be mounted in any one of
six positions. Refer to FSG–MNL–00185 (Parts Manual For Hale Single Stage Booster Pumps),
paragraph 2.1, (Gearbox Illustrated Breakdowns) for a reference to the appropriate drawing and
sheet number providing the views of the gearbox positions available.
Inside the gearbox a gear set transfers engine power from the input shaft, made of heat treated
nickel steel, to the pump shaft to turn the impeller at the appropriated speeds, which are determined by the gear ratio of the gear set selected. Hale offers a variety of pump gear ratios to accommodate a wide range of end-user and apparatus manufacturer requirements based on the
pump's intended use, horsepower and speed rating of the engine, or the torque rating of the
transmission PTO. Refer to FSG–MNL–00185 (Parts Manual For Hale Single Stage Booster
Pumps), paragraph 2.1, (Gearbox Illustrated Breakdowns) for a reference to the appropriate
drawing and sheet number providing the gear ratio listings available.
2.5. Pump Drives
The Hale Flex Series pumps support the common types of booster pump drives used on firefighting apparatus:
• The most common drive is the PTO mounted on the truck transmission or four-wheel drive
transfer case, which allows for pump and roll operation.
• Direct engine mounting via SAE#3 (or #4) flywheel housing.
Hale booster pumps are built to produce the volumes and pressures shown on their respective
performance curves and specifications (see paragraph 2.3, Pump Specifications And Numbering). However, the volumes and pressures safely obtainable are dependent on the torque capacity of the apparatus transmission or transfer case, power takeoff and the pump drive line. In most
cases, the torque rating of the PTO determines maximum pump performance.
The apparatus builder can provide various pump performance spots that will define the torque
limit of the PTO in terms of gpm and psi. When pumping continuously, care should be taken not
to overheat the PTO, transmission or transfer case.
Hale booster pumps are available for either engine rotation or opposite engine rotation PTO operation. Since some PTOs match engine rotation and some turn opposite of the engine rotation,
each pump model can be built to match the rotation of the PTO.
NOTE
Please refer to Hale Bulletin #886 and F–72 (Hale Torque Limit Chart) for further assistance in selecting the correct Flex series booster pump PTO.
Hale booster pumps are also available with an adapter that allows direct engine mount. Figure 5
shows the available flywheel housing (SAE #3 or #4) with the gearbox in the inverted configuration and the volute in the up configuration.
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Figure 6. Direct Engine Mount
2.6. Optional Pump Components
In addition to the basic parts of Hale booster pumps described above, the following items are
available to enhance pump operation:
• Anodes
• TRVs
2.6.1 Anodes
The Hale anode system (Figure 6) helps prevent pump damage caused by galvanic corrosion.
Figure 7. Hale Anode
Galvanic action pits the pump and pump shaft material. The popularity of non-corrosive water
tanks and piping has increased this type of corrosion in today’s fire pumps. The Hale anode system is a sacrificial metal, which helps prevent corrosion. A Hale makes an anode that will fit on
any Hale truck mounted pump, regardless of age or model. The RSD uses Hale anodes designed
to be easily installed ONLY requiring four bolts and a gasket. Total time to install is just fifteen
minutes or less, yet it will provide years of protection for the pump. The anode kit is designed for
installation in the standard Hale 115 series flange opening located on the side of the RSD volute
(K port). On fabricated manifolds and similar applications, the installer is to provide 1-1/4-in NPT
openings and install anodes directly. It is recommended that one anode be installed on the suction side and one on the discharge side.
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2.6.2 TRVs
Hale optional offers a thermal relief valve in two temperature ranges and with remote indication.
• TRV–120
• TRV–170
• TRV–L
The TRV is a thermal relief valve that acts as a thermostat and opens when the temperature of
the water in the pump exceeds 120 ℉ (TRV–120) or 170 ℉ (TRV–170) and resets (closes)
when the water cools. The RSD utilizes the standard Hale 115 series flange opening located on
the side of the volute (K port) and a flange adaptor to house the TRV. For all other Flex series
booster pumps the TRV must be installed on a fabricated manifold and similar application and
the installer is to provide 1-1/4-in NPT opening and install the TRV close to the volute discharge
port. The TRV discharge water should be directed to the ground or back to the booster tank, helping to keep the pump cool and avoiding premature wear and damage.
The TRV–L is a TRV (120 ℉ or 170 ℉) with the added feature of a remoted indicator (audible
and visual) panel to show when the TRV is open and flowing water. The indicator panel also has
an integral test switch.
15
3. MAINTENANCE OPERATING PROCEDURES
This section provides information and procedures for the operation of Hale booster pumps for
the purpose of performing maintenance. Maintenance operating procedures differ greatly from
typical operations. Typical operations are based on the pump being installed in a firefighting apparatus and include pumping from: an onboard tank, or a hydrant, or from draft. Operating procedures for maintenance purposes include pump performance verification, repair verification,
and troubleshooting and unless otherwise indicated, these instructions apply to all Hale booster
pumps.
THE PROCEDURES IN THIS SECTION PROVIDE ONLY GENERAL/MINIMAL INSTRUCTION. DO NOT REPLACE LOCAL PROCEDURES OR POLICIES OR RECOMMENDATIONS
AND PROCEDURES PROVIDED IN THE APPARATUS/TRUCK/UNIT MANUAL WITH
THESE PROCEDURES.
ALWAYS FOLLOW LOCAL GUIDELINES FROM THE AHJ AND THE APPARATUS MANUFACTURER.
ALWAYS FOLLOW PROPER OPERATING PROCEDURES. THE PUMP OPERATOR MUST
BE FAMILIAR WITH THE PUMP OPERATING INSTRUCTIONS AS WELL AS OTHER OPERATING GUIDELINES FOR THE APPARATUS AND ACCESSORIES.
A PRESSURE HAZARD MAY EXIST EVEN WHEN THE PUMP IS NOT RUNNING. PRIOR
TO REMOVING HOSES OR CAPS FROM PUMP CONNECTIONS, RELIEVE PRESSURE BY
OPENING DRAINS. BLEEDER VALVES SHOULD ALSO BE USED WHEN CONNECTING
TO AN INTAKE FROM A PRESSURIZED SOURCE.
DO NOT EXCEED OPERATING PRESSURE LIMITS OF PUMP, INSTALLED PLUMBING,
HOSE(S), OR EQUIPMENT IN USE.
OPERATORS, INSTALLERS, AND MAINTENANCE PERSONNEL MUST BE TRAINED AND
QUALIFIED FOR ALL THE ACTIVITIES THEY PERFORM.
FAILING TO REDUCE SYSTEM PRESSURE BEFORE SYSTEM SHUTDOWN OR FLUSHING COULD RESULT IN WATER HAMMERING.
IF IN 30 TO 45 SECONDS ONE OF THE FOLLOWING (BULLETS) DOES NOT OCCUR
STOP THE PUMP AND CHECK FOR AIR LEAKS OR A POSSIBLE PUMP TROUBLE.
• THE DISCHARGE GAUGE READING INCREASES
• THE INTAKE GAUGE READING FALLS BELOW ZERO
• THE PRIMING PUMP DISCHARGES WATER TO THE GROUND
CONTINUING TO RUN THE PRIMING PUMP MAY RESULT IN PUMP FAILURE OR DAMAGE.
Utilize the testing provided herein ONLY for the intended purpose. The Repair Verification Operations procedure (paragraph 3.1) is intended as the initial post repair test for a repaired booster
pump and the paragraphs description explains why. If the pump passes the Repair Verification
Operations procedure proceed with the Pumping From Draft Verification Operations procedure
(paragraph 3.4 on page 23). ALWAYS verify a repaired pumps drafting ability before returning the
pump to service.
17
The Vacuum Test (paragraph 3.2 on page 20) is intended as the initial check to determine if a
pump leaks. This test quickly and safely indicates if a leak exists however it typically ONLY indicates a leak is present and usually does NOT locate the leak (or leaks). If a pump fails the Vacuum Test utilize the Pressure Test (paragraph 3.3 on page 22) to locate the leak (or leaks).
3.1. Repair Verification Operations
Perform the following steps when a repair is completed to verify the pump is functional. This procedure is performed by pumping from a hydrant to ensure a clean, high quality water source and
to eliminate the risk of pump damage that could occur from an extended priming period which
could result from attempting to draft with an unverified pump.
NOTES
Refer to department procedures for setting wheel chocks and laying out suction and
discharge hoses.
All valves, drain cocks, and caps should be closed.
A. Prepare truck to pump.
Position truck for best hydrant hookup and discharge hose layout. 1.
Bring truck to a complete stop and come to an idle. (Never attempt to 2.
shift a moving truck from
Apply truck parking brake. 3.
Shift truck transmission into NEUTRAL. 4.
Engage pump PTO switch. 5.
Shift road transmission into proper gear (usually DRIVE). 6.
Check the indicator lights to see if pump is in gear, check speedometer, 7.
and listen as pump goes in gear.
Momentarily press accelerator to ensure shift is complete. 8.
DO NOT LEAVE THE CAB OR ATTEMPT TO PUMP UNTIL ALL OK TO PUMP INDICATORS
IN THE CAB ARE ILLUMINATED. SEE FIGURE 7.
ROAD to PUMP.)
18
Figure 8. Driver Compartment Indicator Lights
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