Liquid Controls PT, PT30, PT25, PT20, PTH20 Maintenance Manual

ID108F

Installation, Operation

& Maintenance Manual

PT-Series Petroleum Pumps

For Refined Petroleum Products and Industrial Solvents

Model PT20

Model PT30

Warning: (1) Periodic inspection and maintenance of Liquid Controls Group products is essential. (2) Inspection, maintenance and
installation of Liquid Controls Group products must be made only by experienced, trained and qualified personnel. (3) Maintenance,
use and installation of Liquid Controls Group products must comply with Liquid Controls Group instructions, applicable laws and safety
standards (such as NFPA Pamphlet 58 for LP-Gas and ANSI K61.1-1972 for Anhydrous Ammonia). (4) Transfer of toxic, dangerous,
flammable or explosive substances using Liquid Controls Group products is at user’s risk and equipment should be operated only by
qualified personnel according to applicable laws and safety standards.

Model PT25 with optional air

operated valve (AOV) and strainer

LIQUID CONTROLS GROUP

Warning

Install, use and maintain this equipment according to Liquid Controls Group’s instructions and all applicable federal,
state, local laws and codes. Periodic inspection and maintenance is essential.

Liquid Controls Group One Year Limited Warranty

Liquid Controls Group warrants that its products will be free from defects in material and workmanship for a period of
one year from date of installation, provided that the warranty shall not extend beyond twenty-four (24) months from the
date of shipment from Liquid Controls Group. If a warranty dispute occurs, the distributor may be required to provide
Liquid Controls Group with proof of date of sale. The minimum requirement would be a copy of the distributor’s invoice
to the customer. Liquid Controls Group products which fail within the warranty period due to defects in material or
workmanship will be repaired or replaced at Liquid Controls Group’s option, when returned, freight prepaid to Corken,
Inc., 3805 N.W. 36th Street, Oklahoma City, OK. 73112.

Parts subject to wear or abuse, such as mechanical seals, vanes, piston rings, packing and other parts showing
signs of abuse are not covered by this limited warranty. Also, equipment, parts and accessories not manufactured by
Liquid Controls Group but furnished with Liquid Controls Group products are not covered by this limited warranty and
purchaser must look to the original manufacturer’s warranty, if any. This limited warranty is void if the Liquid Controls
Group product has been altered or repaired without the consent of Liquid Controls Group.

All implied warranties, including any implied warranty of merchantability or fitness for a particular purpose, are expressly
negated to the extent permitted by law and shall in no event extend beyond the expressed warranty period.

Liquid Controls Group disclaims any liability for consequential damages due to breach of any written or implied warranty
on Liquid Controls Group products. Transfer of toxic, dangerous, flammable or explosive substances using Liquid
Controls Group products is at the user’s risk. Such substances should be handled by experienced, trained personnel
in compliance with governmental and industrial safety standards.

Important notes relating to the European Union (EU) Machinery Directive

Pumps delivered without electric motors are not considered as machines in the EU Machinery Directive. These pumps
will be delivered with a Declaration of Incorporation. The fabricator of the machinery must assure and declare full
compliance with this Directive before the machine in which the pump will be incorporated, or of which it is a part, is
put into service.

Contacting the Factory

Before you contact the factory, note the model number and serial number of your pump. The serial number directs
us to a file containing all information on material specifications and test data applying to your specific pump.
When ordering parts, the Liquid Controls Group Installation, Operation and Maintenance (IOM) manual should be
consulted for the proper part numbers. ALWAYS INCLUDE THE MODEL NUMBER AND SERIAL NUMBER WHEN
ORDERING PARTS.

The model and serial numbers are shown on the nameplate of the unit. Record this information for future reference.

Model no.

Serial no.

Date purchased

Date installed

Purchased from

Installed by

2

Table of Contents

Principles of the PT-Series Pumps ................................................................................................................................. 4

Exclusive Features of the PT-Series Pumps ................................................................................................................... 4

Installation of the PT-Series Truck Pump ........................................................................................................................ 5

Power Take-Off Drive Systems .................................................................................................................................... 5

Hydraulic Drive Installation .......................................................................................................................................... 6

Pump Rotation ............................................................................................................................................................. 6

To Change Pump Rotation ........................................................................................................................................... 6

Operation of the PT-Series Truck Pump ......................................................................................................................... 6

Installation of the PT-Series Stationary Pump ................................................................................................................ 7

Coupling alignment ...................................................................................................................................................... 7

Driver Installation ......................................................................................................................................................... 8

Operation of the PT-Series Stationary Pump ................................................................................................................. 8

Maintenance of Your Pump System................................................................................................................................ 9

Pump Maintenance Schedule ...................................................................................................................................... 9

Bearing Lubrication ...................................................................................................................................................... 9

Strainers ..................................................................................................................................................................... 10

Pump Disassembly Instructions ................................................................................................................................ 10

Pump Assembly Instructions ..................................................................................................................................... 10

Vane Replacement ..................................................................................................................................................... 12

Bypass Valve Assembly ............................................................................................................................................. 12

Air Operated Valve (AOV) Assembly .......................................................................................................................... 12

Repair Kits for the PT-Series Petroleum Pumps ........................................................................................................... 13

Appendix A—Model Number and Identification Codes.................................................................................................14

Appendix B—Technical Specifications for PT-Series ................................................................................................... 15

Appendix C—Performance Curves ............................................................................................................................... 16

Appendix D—Outline Dimensions................................................................................................................................. 18

Appendix E—Part Details .............................................................................................................................................. 25

Appendix F—Trouble Shooting Guide for the PT-Series Pumps .................................................................................. 35

Appendix G—Flush and Storage Instructions for the PT-Series Pumps ...................................................................... 36

3

Principles of the PT-Series Pumps

Exclusive Features of the

The PT-Series pumps are a special type of rotary positive
displacement pump, known as a sliding vane pump.

The sliding vane pump has many of the positive displacement
advantages of the gear pump, plus the ability to compensate
for wear, and operate at a lower noise level.

The sliding vane pump consists of a rotor turning inside a
cam that is machined eccentrically in relation to the rotor.
As the rotor turns, the liquid that is trapped between the
rotor, cam and vanes is displaced. The PT-Series pumps
are made with vanes produced from advanced polymers
which exhibit extremely low coefficients of friction. The
self adjusting vanes compensate for wear and help extend
the life of the pump.

Reliable mechanical

O-ring design delivers
maximum sealing
capability and is
available with optional
seal materials.

seal design with
optional seal materials.

PT-Series Pumps

The pumping of volatile liquids is one of the most difficult
of all pumping jobs, and pumping from a delivery truck
makes it even more difficult, so more attention must be
given to the design and manufacturing of the pump and
to its installation and operation.

In addition to being especially suited for handling volatile
liquids, the PT-Series pumps have a number of other features
to help make them more easily operated and maintained.

Corrosion resistant
bypass valve.

Available with
standard bypass
valve or optional
air operated
valve (AOV) for
high and low
flow control.

Heavy duty ball
bearings provide
greater durability
and strength.

Conveniently located
drain plug allows you to
empty the pump quickly
when necessary.

Optional flanges and
strainer available.

Hollow rotor helps
reduce weight.

Self adjusting
vanes compensate
for wear.

4

Installation of the PT-Series
Truck Pump

The mechanical installation of the PT-Series pump is a simple
matter. A rotation arrow is located on the side of the pump.
Examine the PTO and determine the direction of its rotation
before installing the pump. The PT-Series pump will match
either PTO rotation. Connect the drive shaft to the pump shaft
that turns the pump in the direction of the arrow.

The PTO SELECTION is important. For maximum
performance , the pump requires a PTO with an average
output speed of 500 to 700 RPM. In addition, the truck engine
must be operating at the appropriate RPM to maintain oil
pressure, water circulation, and the electrical system.

THE DRIVESHAFT that connects the pump to the PTO
should be of the “splin ed” or slip type. This ty p e of driveshaf t
permits the shaft to adjust for PTO movement and twisting
of the truck frame. A fixed driveshaft will transfer the
forces directly to the pump and PTO and shorten the life
of both considerably. The yokes of the driveshaft universal
joints must be positioned as shown in Figure 1. Improper
positioning will cause premature wear and potentially
destroy the bearings in the pump and PTO.

INLET PIPING should be as short as possible and at
least the minimum diameter specified for the model with
few restrictions so that the pressure drop is limited.

The outlet piping should include the following:

1. A pressure gauge should be installed in the pump
outlet or near it. A pressure gauge is necessary to
determine the efficiency of your pumping system.

2. If a meter with an air eliminator is installed, never pipe
the eliminator directly into the pump inlet piping or
into the liquid part of the system at any point (refer to
the meter installation manual).

3. The discharge piping should be at least the same size
as the meter piping.

Power Take-Off Drive Systems

Proper pump operation and long life is directly dependent
upon a good drive system. Many truck pumps utilize a power
train consisting of shafts and universal joints located between
the power take-off shaft of the truck engine and the pump.

the limits for the particular equipment being used (usually
a maximum of 15° at pump speeds up to 800 RPM). To
ensure that shaft expansion or contraction does not distort
the drive system, a splined slip joint should be placed
between the two universal joints. Again, the drive shaft
should be of t h e “splined” or slip typ e to permit the shaf t to
adjust for PTO movement and twisting of the truck frame. A
fixed drive shaft transmits the forces directly to the pump
and PTO which will shorten the life of both considerably.

Third, the yokes of the drive shaft universal joints must be
in a parallel position. Figure 1 below illustrates the proper
arrangement of the yokes.

Improperly installed U-joints will cause premature failure of
U-joints as we ll as bearings in the pump and PTO. Properly
mounted, the second universal gives uniform motion to
the drive shaft by compensating for the rotational error
intr oduced by the f irst U-joint. An even number of uni versal
joints (2, 4, 6 etc.) should always be used. An odd number
of U-joints will cause unbalanced pump shaft rotation. This
problem becomes greater with increased angularity.

Other points to consider include the proper sizing of the
shaft components with a maximum horsepower load to be
expected, good alignment of hanger bearings and proper
pump coupling alignment.

Improper PTO systems account for a high percentage of
truck pump failures. Always remember to disengage the
clutch before shifting the PTO into gear. Shifting the PTO into
gear without disengaging the clutch imparts an enormous
shock on the PTO, drive shaft, pump and meter and will
soon damage one or all of them.

For proper installation of pump drives, follow the rules
listed below:

1. Driver shaft and pump shaft must be parallel, plus or
minus one degree.

2. Operating angle of the ‘’floating’’ shaft must be 15°
maximum.

3. Universal yokes must be in line and parallel.

4. Splined slip joints must be used where needed.

5. Use an even number of universal joints.

There are several basic principles that should be followed
in designing a PTO drive. To produce a workable power
train that results in long pump life and reduced drive wear,
these principles SHOULD NOT be violated.

First, the driver shaft and the driven shaft must be parallel
to one another within plus or minus one degree. Improper
alignment will cause jerking and back and forth “whip” to the
pump shaft; thereby imparting a surging pulsation to the liquid
flow which results in noise, vibration and abnormal wear.

Second, the angle of the ‘’floating’’ shaft should be within

Figure 1: Shaft alignment

Note: A drive shaft guard between the pump and
PTO should be installed (not shown).

6. Always use the least practical number of shafts.

5

PTO selection and drive system design is extremely important.
The PTO should have an average output speed up to 640 RPM
to maximize the performance of the PT-Series pump when the
truck engine is operating at the recommended speed.

The designer of the drive system must select a PTO drive
shaft capable of meeting the torque requirements of the
pumping system.

Be certain the shaft protector (see Part
Details) is mounted over the non-driven shaft

end. Operation without shaft protector can
cause serious personal injury, major property damage,
or death.

If the pump must be disassembled to reverse rotation. Refer to
the “Maintenance of Your Pump System” for instructions.

Hydraulic Drive Installation

Hydraulic motors must be well supported and keep their
shafts parallel to the pump shaft. To drive PT pumps
hydraulically, Liquid Controls Group provides a close­coupled hydraulic motor adapter. The adapter aligns the
hydraulic motor drive and the pump shaft via a lockring
and a flexible coupling connected to a keyed shaft. This
adapte r must be lubricated with g rease at least eve ry thre e
months. Refer to the “Bearing Lubrication” section of this
manual for instructions.

Figure 2: Hydraulic Drive (see Appendix E for Part Details)

Pump Rotation

For proper pump rotation, make sure the pump’s rotation
arrows match the pump driver rotation (see Appendix E for
parts details). NOTE: PT-Series pumps are double ended

shafts and can be mounted in either position.

Direction of Rotation

Operation of the PT-Series
Truck Pump

The following steps should be performed for the initial
pumping operation:

1. Close the shutoff valve on the end of the delivery hose.

2. Start the pump and cycle the nozzle open and closed

to clear all air from the system.

3. Check the discharge pressure on the outlet of the

pump. This pressure is typically set at 80 to 95 psi.

4. Bypass Valve Adjustment

For a standard bypass valve, locate the adjustment

set screw under the bypass valve cap (see Appendix
E for parts details). Turn adjustment screw clockwise
to increase pressure and flow. Turn counter clockwise
to decrease pressure and flow.

Close the nozzle and check the bypass pressure. If

too high, turn adjustment screw counter clockwise
until desired pressure is reached.

With the hose nozzle open, adjust the pump bypass valve

setting to the desired flow rate. Close the nozzle slowly
and check the system pressure. CAUTION: DO NOT
EXCEED A CLOSED NOZZLE PRESSURE OF 125 PSI.

Replace bypass valve cap and bypass valve cap

gasket with seal washer and tighten.

5. Air Operated Valve (AOV) Adjustment

Right hand/clockwise rotation

(PT25)

Figure 3: Direction of Rotation

Left hand/counter clockwise rotation

(PT25)

To Change Pump Rotation

The PT Series pump is equipped with a double ended rotor
and shaft, the pump moto rs can be driven from either shaft
end. To change rotation, rotate the pump 180 degrees. The
opposite shaft will then become the driven shaft.

Figure 4: Typical truck delivery system using an AOV.

6

For pumps equipped with an Air Operated Valve (AOV)

assembly, air must be supplied from the truck air system
via a flow sensing valve. Approximately 70 psi (4.8 bar)
minimum air pressure is required to properly operate
the air operated valve. THE AIR PRESSURE MUST NOT
EXCEED 125 psi (8.6 bar). The sensing valve should
be installed in accordance with the diagram shown in
Figure 4. This system depicts the additional use of a
throttle control which is optional. All adjustments must
be made at normal operating speeds.

5.1 Set the low pressure adjustment first by slowly
closing the nozzle to relieve the air pressure in
the AOV assembly.

5.2 Remove the AOV cap and O-ring (see Appendix
E for parts details).

5.3 Turn the low pressure adjustment stem counter­clockwise to decrease the bypass pressure and
vice versa to increase the pressure.

5.4 Re-install the O-ring and AOV cap and tighten
securely.

5.5 Open and close the nozzle several times to ensure
proper setting and repeatability.

5.6 Slowly close the delivery nozzle again to relieve
the air pressure in the AOV assembly.

5.7 Remove the AOV cap and O-ring.

5.8 Adjust the locknuts clockwise to decrease delivery
flow rate and/o r pressure and vice versa to increase
the flow rate. NOTE: Make sure the locknuts are

securely locked against each other before re­installing the adjustment stem cap and O-ring.

5.9 Slowly open the delivery nozzle and note delivery
flow rate and/or pressure.

5.10 Repeat steps 5.7–5.9 until desired flow rate and/or
pressure are achieved.

6. You may increase the speed of the pump as long as
it increases the flow through the delivery nozzle. It is
recommended to turn the pump at approximately 575
RPM for optimum performance. However, the pump
can be safely turned to 640 RPM if system conditions
permit (refer to Appendix B).

performance, the principles discussed in this book should
be followed. The piping details provided illustrate methods
proved by hundreds of installations. Your own needs may
require light variations, but every effort should be made to
follow the recommendations identified in this manual.

The foundation for the pump is important. The foundation
must be firm, level and preferably made of concrete. The
suggestions in figure 5 should be observed.

Figure 5

Coupling alignment

The coupling alignment must be near perfect to give
quiet, long-life service to the pump and driver. The pump
and driver shafts are carefully aligned at the factory but
always should be checked after the pump is installed and
before the initial operation.

Lay a straight edge across coupling halves, top, and side;
both positions must line up to be correct (see figure 6). If
misalignment exists, adjust the shims between the pump base
and the foundation until exact alignment is accomplished.

NOTE: IF PUMP SPEED IS INCREASED, BE CERTAIN
THE METER AND PIPING SYSTEM WILL HANDLE THE
INCREASED FLOW AND PRESSURE!

Installation of the PT-Series
Stationary Pump

NOTE: NEW PUMPS CONTAIN RESIDUAL TEST FLUID
SO IT MAY BE NECESSARY TO FLUSH THE PUMP
PRIOR TO USE. ALL PUMPS SHOULD BE INSTALLED
IN AN AREA THAT IS WELL VENTILATED.

The installation of the PT-Series pumps are simple.
However, in order for the pump to deliver optimum

Figure 6

No pump can discharge more liquid than it receives, so
the pump location and the inlet piping must be given
ca reful atten tion. If the inlet p iping is inadequ ate to su pply
the demand of the pump, you may expect trouble.

The installer and/or the user must take into account
the following:

• The pump must be located as near the storage tank
as possible. The complete inlet line, including the

7

vertical line from the tank must not exceed 12 feet (3.7
m) in length.

• The inlet must be the same size or next size larger than
the suction on the pump.

• Use an eccentric swage at the pump inlet nozzle to
change the line size (flat side up).

• Make certain the inlet line is level or sloped downward
to the pump.

• A strainer of the “Y” type, with 20 mesh screen or 1/16
in. perforated steel, must be on the inlet line of the
pump. (Mesh size indicates the number of openings
per lineal inch).

• Use a flexible connection in the pump inlet and outlet
piping to compensate for piping strains.

• The Inlet piping must be free of air leaks.

• All piping must be supported to avoid stress to the
pump casing.

• Potential risk due to local conditions regarding the
installation and operation (e.g. poor ventilation and
additional risks due to other elements in the vicinity, etc.).

• Qualification of the personnel.

• Type of liquid being transferred.

• Specific safety measures to be applied (e.g. gas
detection, automatic shut-off valves, personal protective
equipment, etc.).

Driver Installation

The wiring of your electric motor is extremely important and
must be done by a competent electrical contractor. The
following wire sizing chart indicates the minimum standards
for wire sizes.

Improper motor wiring will cause expensive motor difficulties
from low voltage. If you suspect you have low voltage, call
your power company. Connecting your motor for the voltage
you have available is important too. The motors furnished
with the stationary pumps are usually dual voltage, so
you must be sure of the voltage your power company is
supplying you. Your motor will be completely ruined if it is
connected to the wrong voltage.

out of the motor. No motor manufacturer will guarantee an
explosion-proof or totally enclosed motor against damage
from moisture.

Engine drivers pose a special consideration. The
manufacturer’s instructions must be followed. When the
stationary pump is equipped with an engine from the
factory, the engine speed should normally not exceed 1,800
RPM. Excessive engine speed will overload the engine and
cause early failure. The engine loses 3% of its power for
every 1,000 ft (305 m) above sea level, so if your installation
is at a higher altitude than normal, consult the factory.

Motor

Motor

Hp

phase

31115 34.0 6 4 2

3230 9.6 121212

5 1 115 56.0 4 1 1/0

3 230 15.2 12 12 10

7-1/2 1 23 0 40. 0 8 6 4

3 230 22.0 10 10 8

10 3 230 28.0 8 8 8

15 3 230 42.0 6 6 6

20 3 230 54.0 4 4 4

25 3 230 68.0 2 2 2

30 3 230 80.0 1 1 1

40 3 230 100.0 2/0 2/0 2/0

50 3 230 130.0 3/0 3/0 3/0

1

Based upon 3% voltage loss copper wire type TW. Single phase
motor calculations are based on two times distance.

Approximate

Volt s

220 17.0 12 8 8

46 0 4.8 12 12 12

230 28.0 10 6 4

46 0 7.6 12 12 12

450 11.0 121212

460 14.0 121212

460 21.0 101010

460 27.0 8 8 8

460 34.0 6 6 6

460 40.0 6 6 6

460 52.0 4 4 4

460 65.0 2 2 2

full load

amperes

Recommended wire size,

Length of run (ft)

0–100 to 200 to 300

AWG

1

A humid climate can cause problems, particularly in
explosion proof motor applications. The normal breathing
of the motor, and alternating between being warm when
running and cool when stopped, often will cause moist
air to be drawn into the motor housing. This moist air will
condense, and may eventually add enough free water to
the inside of the motor to cause it to fail. To prevent this,
make a practice of running the motor and pump at least
once a week on a bright, dry day for an hour or so (pumping
through the bypass system). In this period the motor will
heat up and vaporize the condensed moisture, and drive it

Operation of the PT-Series
Stationary Pump

Performance curves are provided in Appendix C.

The following steps should be performed for the initial
pumping operation:

1. Make sure the strainer screen is clean.

2. Rotate the pump by hand.

8

3. Check V-belt drive or direct drive coupling alignment.

Misalignment will accelerate wear on the drive system,

motor bearings and pump.

4. Check motor for proper wiring.

5. Review complete system to make certain the function
of every valve and piece of equipment is clearly
understood. Everyone operating this system must be
properly trained in normal operating procedures and
emergency procedures in the event of a malfunction.

6. Close all hose valves.

7. Slowly open the storage tank bottom shut-off valve
(suction line to the pump). Immediately check the
system for leaks.

9. Record all pressure gauge readings, especially the
pressure gauge located at the discharge of the pump.
Start the pump and circulate the liquid through the
internal bypass valve.

replacement parts when repairing your PT-Series pump.
Follow the instructions provided with the parts.

When it becomes necessary to repair your pump or
remove it from the system, you must be absolutely
certain that all product being pumped is bled from the
pump and connected piping. Once all the product has
safely been bled from the pump and connected piping,
make c e r ta i n n o pre s s u r e is lef t in the syste m . S PECIAL
CARE MUST BE TAKEN DURING THE BLEED DOWN
PROCESS TO AVOID DANGER TO PERSONNEL AND
PROPERTY IN THE AREA. Take your time in bleeding
your system and make proper provisions to vent or
capture the product in accordance with local regulations.
ON LY A P ROPER LY T RA IN E D IND IVID U AL SH OU LD B E
ALLOWED TO BLEED A PUMPING SYSTEM.

Pump Maintenance Schedule

Make sure the transfer hoses are not “kinked’’. A kinked
hose can cause excessive pump discharge pressure.
Always make sure your hoses are not out of date.

10. Verify the proper pump rotation direction by referring
to the part details in Appendix E or the “Pump
Rotation” section at the beginning of this manual.

11. Your pump has an internal bypass valve so it must
be adjusted to the required setting. The internal
bypass valve may be adjusted while the pump is in
operation by removing the bypass valve cap. Turning
the adjusting screw clockwise increases the internal
bypass valve pressure setting and counterclockwise
decreases the pressure setting.

12. An amp meter may be used by adjusting the bypass
valve until the amp meter indicates the full load motor
amperage rating shown on the motor nameplate or
maximum rated differential, whichever comes first. If
the motor overload protection device stops the motor
in this period the bypass valve setting is too high
and should be readjusted. After a satisfactory setting
is achieved, “seal” the bypass valve cap to prevent
tampering with the adjustment.

13. After initial operation, re-check the strainer screen.

Maintenance of Your Pump System

Your PT-Series pump requires regular maintenance
and care like all mechanical equipment. A neglected or
improperly repaired pump will result in premature failure
and cause unsafe conditions. To promote product longevity
and safety, maintenance must be performed by properly
trained technicians. Make sure all safety systems are in
place and the system pressure has been relieved before
attempting ANY maintenance.

Normal wear parts are the mechanical shaft seals,
bearings, vanes, vane drivers and sideplates. All of these
parts plus O-rings and grease seals are offered in the
“repair kit.” Use only genuine Liquid Controls Group

Daily Monthly 3 Months
Lubricate bearings •
Inspect drive coupling •
Clean Inlet Strainer •
Check for leaks •
Inspect hose and  ttings •

Bearing Lubrication

NOTICE: AVOID ENTANGLEMENT IN MOVING PARTS.
DO NOT LUBRICATE PUMP BEARINGS, HYDRAULIC
ADAPTER COUPLING OR ANY OTHER PARTS WHILE
THE PUMP IS ACTIVE.

There are two lubrication points in which to grease
the pump bearings; one zerk per bearing cap located
at opposite ends of the pump. Two grease relief and
ventilation fittings have been provided—one at each
end of the pump—to help prevent over greasing the
bearings. Over greasing can cause seal failure if grease
passageways are blocked in some way. Remove relief
fittings or confirm free movement of relief prior to
greasing bearings. Clean each fitting before lubricating
the bearings. This practice helps to prevent foreign
material contamination of the bearings and accidental
over-pressurization of the mechanical seals. Use only
NLGI grade 2 ball bearing grease.

Lubricate ball bearings and hydraulic motor couplings (if
equipped) a minimum of every three months.

Greasing Procedure:

1. Remove grease relief fittings from bearing covers or
hydraulic motor adapter.

2. Grease with a hand gun until grease escapes from
grease relief fitting port.

3. Return grease relief fittings to bearing covers.

9

DO NOT over grease pump bearings. Some grease will
escape from the grease tell-tale hole after lubrication.
This is normal, but excessive grease on pumps that use
mechanical seals can cause seal failure.

Strainers

Clean strainers regularly to avoid pump starvation.
Intervals between cleaning depend upon the application
and conditions.

Pump Disassembly Instructions

1. Truck engine must be turned off and PTO disengaged.

2. Bleed all product from the system as described
above. NOTE: There is a 1/4 in. NPT connection at
the bot tom of some models that allows you to easily
drain the pump.

3. Remove the PTO shaft or hydraulic drive motor,
adapter, and coupling.

NOTICE: ADHERE CLOSELY TO ALL HAZARD
WARNINGS AND INSTRUCTIONS IN THE
“MAINTENANCE” SECTION OF THIS MANUAL.

4. Carefully clean the pump shaft. Begin at one end of
the pump, and make certain that the shaft is free of
nicks and burrs to prevent damage to the mechanical
seal when removing the head assembly.

Seal jacket
driver tabs

Seal jacket

Figure 7

5. Unscrew the bearing cover bolts and pull the
bearing cover and gasket off the shaft. Dispose of
the bearing cover gasket.

6. Unscrew the opposite bearing cover bolts and pull
the bearing cover and gasket off the shaft. Dispose
of the bearing cover gasket.

7. Remove the locknuts and lockwashers in place:

7.1 Bend the lockwasher tab up and unscrew the locknut

counterclockwise and remove it from the shaft.

7.2 Pull the lockwasher off the shaft. Check the

lockwasher for damage and replace if needed.

7.3 Repeat steps 7.1 and 7.2 on the opposite end of

the shaft.

8. Unscrew the head bolts and carefully pry the head
from the pump casing.

9. Pull the head off the shaft. The head O-ring, bearing
and mechanical seal will come off with the head
assembly. Detach and dispose of the head O-ring.

9.1 Take the bearing out of the housing in the head.

9.2 Remove the mechanical seal. Using two

screwdrivers, gently push the backside of the seal
jacke t to remove t he seal from the head (s ee Figure

7). Be careful when using the screwdrivers on the
seal faces. The seal faces can be damaged. Detach
and dispose of the mechanical seal O-rings.

10. Remove the rotor and shaft from the pump casing.
While removing the shaft, cup one hand underneath
the rotor so the vanes and vane drivers do not fall out.
Carefully set aside the rotor and shaft, vanes and vane
drivers for future reassembly.

11. Repeat steps 8 and 9 above to remove the remaining
components from the opposite side of the pump.

Pump Assembly Instructions

Before reassembly, check each component part for wear
or damage. If necessary, replace flawed parts. Wash out
the bearing/seal recess of the head and remove any burrs
or nicks from the rotor and shaft.

1. Reassemble the first side of the pump by inserting a
new head O-ring into the groove of the head. Lightly
lubricate the O-ring to facilitate installation. Start on
one side of the groove and stretch the O-ring into the
groove (see Figure 8).

10

13. Locknut In stallation

All bearing locknuts and lo ckwashers MUST be position ed

and adjusted properly. Overtightening locknuts can lead
to bearing failure or broken lockwasher tabs. If locknuts
are loose, the rotor will shift against the heads and
cause considerable wear (see Figure 9).

B

2 stops equals one
tab (.002 in.)

Figure 8

2. Attach the head to the pump casing. Insert four head
bolts 90° apart and tighten to 25 ft•lbs (34 Nm).

3. Mechanical Seal

Apply a small amount of light oil in the head recess. Press

the m echanica l seal assembly into the re ce ss of the h ead
so the seal jacket drive tabs face the rotor. The pin in the
stationary seat must be between the lugs in the back of
the head recess (see Figure 7).

4. Hand pack the ball bearing with grease. See the “Bearing
Lubrication” section for recommended grease.

5. Insert the bearing into the head recess. The bearing
balls should face outward, and the grease shield
should face inward. Make sure the bearing is square
and completely seated against the mechanical seal.

6. Turn the pump casing around to reassemble the
opposite side.

7. Place vanes into the upper rotor-shaft slots. Ensure
the curved tip of each vane faces radially outward and
all in the same direction of rotation (see Figure 10).

8. While cupping these vanes in place, rotate the rotor-shaft
over 180° and install the vane drivers.

9. Place rotor-shaft and vane assembly into pump case
with the vanes on the bottom. Ensure the ribs in the
vanes face the direction of pump rotation (see Appendix
E for parts details and pump rotation arrows).

10. Place the remaining vanes into the upper rotor-shaft slots
facing the same direction as the first vanes.

11. Install the remaining head, mechanical seal, and bearing
as mentioned in steps 1 through 5. Apply a thin coating
of motor oil to the shaft to facilitate installation.

12. Rotate the shaft by hand to engage the seal jacket
driver tabs. Check for binding or tight spots. If the rotor
does not turn freely, use a soft faced mallet and lightly
tap the rims of the heads until the rotor is in the correct
position. Tighten all remaining head bolts for each head
to 25 ft•lbs (34 Nm) of torque.

Locknut

Lockwasher

(Inner tab fits
1 stop
equals
.001 in.
rotor
movement

Figure 9: Locknut and lockwasher adjustment

A

in rotor slot)

13 .1 O n b ot h e nds of th e p um p s ha ft, s li de on a l oc kwas he r,

with the tabs facing outward, and then tighten a
locknut with the tapered end inward. Make sure the
inner tab (A) of the lockwasher is inserted in the slot
of the shaft threads. Bend slightly, if necessary.

13.2 Carefully tighten both locknuts until the bearings
have reached the bottom of the head recess. DO
NOT overtighten, Make sure the inner tab of the
lockwasher does not shear.

13.3 Loosen both locknuts one complete turn.

13.4 Tighten one locknut until you can feel a slight rotor
drag while turning the shaft by hand.

13.5 Back the locknut off one width of the lockwasher tab
(B). To secure the locknut, bend the closest aligned
lockwasher tab into the slot of the locknut. The pump
should now turn freely when rotated by hand.

13.6 Hand-tighten the opposite locknut until it is snug
against the bearing. Then, with a spanner wrench,
tighten the locknut one width of the lockwasher tab.
Tighten just past the tab width and then back off the
locknut until the tab is aligned with the slot of the
locknut. To secure the locknut, bend the aligned
lockwasher tab into the slot of the locknut. The pump
should still turn freely when rotated by hand.

13.7 Check the adjustment. The locknut and lockwasher
should turn back and forth by hand. If this is not
possible, one or both locknuts are too tight. They
must be alternately loosened one stop at a time
(.001 in.) (25 microns). Begin with the locknut
adjusted last.

11

14. If you have the standard bypass valve, remove the
bypass valve cap and turn the adjustment screw
counterclockwise to relieve the spring tension.
Remove the four 3/8 in. bolts from the bypass valve
cover. Use caution as a small amount of spring

tension will remain on the bypass valve spring
before complete bolt removal. Inspect bypass

valve, spring, and bypass valve cap gasket for wear,
abrasions, etc. Replace if damage is found.

15. If you have an Air Operated Valve (AOV), ensure the air
supply pressure has been relieved and the supply line
disconnected from the valve housing. Remove the AOV
cap and discard the O-ring from underneath. Remove
the retainer ring and locknuts from the adjustment stem.
Remove the four 3/8 in. bolts and lockwashers from
the AOV housing. Carefully remove the AOV assembly
from the pump. Remove and discard the gasket and
clean the gasket areas. Remove the two recessed­head machine screws and the diaphragm cover plate.
Slide the diaphragm assembly out from the housing.
Remove the intermediate vent plate from between the
two diaphragms. Inspect the diaphragms, spring, and
valve for abrasions and replace if necessary.

Vane Replacement

NOTICE: ONLY QUALIFIED TECHNICIANS SHOULD
PERFORM MAINTENANCE AND THEY MUST FOLLOW
THE APPROPRIATE PROCEDURES AND WARNINGS
PRESENTED IN MANUAL.

1. Follow steps 2–6 in the “Pump Disassembly Instructions”

section of this manual to remove the head assembly
from the non-PTO side of the pump.

2. Turn the shaft with your hand until a vane is in the top

(12 o’clock) position of the rotor. Remove the vane.

3. Position a new vane so the rounded edge faces out

from the pump and the relief grooves face towards the
direction of rotation (see Figure 10).

Bypass Valve Assembly

1. Place the bypass valve into the bypass valve bore of
the pump casing with the fluted end inward.

2. Insert the bypass valve spring and spring guide
against the bypass valve.

3. Attach a new bypass valve gasket and the bypass
valve cover onto the pump casing.

4. Tighten the bypass valve adjusting screw into the
bypass valve cover until it makes contact with the
spring guide.

NOTICE: THE BYPASS VALVE SETTING MUST BE
TESTED AND PROPERLY ADJUSTED BEFORE
PUTTING THE PUMP INTO SERVICE. PLEASE SEE
“BYPASS VALVE ADJUSTMENT”.

5. After the bypass valve has been adjusted correctly,
attach the bypass valve cap and gasket.

Air Operated Valve (AOV) Assembly

1. Install the intermediate vent plate between the two

diaphragms ensuring proper orientation with the screw
holes in the housing. Slide the diaphragm assembly
into the housing and install the diaphragm cover plate
and recessed-head machine screws and tighten
securely. Install this assembly with the valve, spring,
and gasket to the pump using the four 3/8 in. bolts
and lock washers and torque to 15 ft•lbs. Install both
locknuts all the way down the adjustment stem and
replace the retainer ring. Install the new O-ring and
AOV cap. Refer to Air Operated Valve Adjustment for
adjustment procedure.

2. Grease bearings per the instructions listed under

Maintenance of Your Pump System.

3. Install the pump according to the installation guidelines

mentioned previously.

4. Repeat steps 2 and 3 until all vanes have been replaced.

5. Follow steps 2–7 and 12–13 of the “Pump Assembly
Instructions” section of this manual to reassemble
the pump.

Relief grooves
face the direction
of rotation

Rounded edge out

Figure 10: PT30 model shown above

12

Repair Kits for the PT-Series Petroleum Pumps

PT20 Repair Kit 4771-X1_1 _

2

Part Number Description Qty.

2-258_

1

O-ring 2

4648 Ball bearing 2

4678 Vane driver 2

4677 Vane 4

4634-X_

1_2

Seal assembly 2

4654 Shaft lockwasher 2

4655 Shaft locknut 2

4650 Grease seal 2

4657 Bearing cap gasket 2

4688 Flange gasket 2

4659 Bypass valve cap gasket 1

4767 Bypass valve cover gasket 1

4653 Shaft key 1

ID108 I.O.M. manual 1

PT25 Repair Kit 4770-X1_1 _

2

Part Number Description Qty.

2-258_

1

O-ring 2

4648 Ball bearing 2

4652 Vane driver 3

4696 Vane 6

4634-X_1_

2

Seal assembly 2

4654 Shaft lockwasher 2

4655 Shaft locknut 2

4650 Grease seal 2

4657 Bearing cap gasket 2

4658 Flange gasket 2

4659 Bypass valve cap gasket 1

4660 Bypass valve cover gasket 1

4653 Shaft key 1

ID108 I.O.M. manual 1

PT30 Repair Kit 4769-X1_1 _

2

Part Number Description Qty.

2-266_

1

O-ring 2

5584 Ball bearing 2

5589 Vane driver 3

5588 Vane 6

4621-X_

1_2

Seal assembly 2

5591 Shaft lockwasher 2

5592 Shaft locknut 2

5586 Grease seal 2

5596 Flange gasket 2

5595 Bearing cap gasket 2

5597 Bypass valve cap gasket 1

5578 Bypass valve cover gasket 1

2270 Shaft key 1

ID108 I.O.M. manual 1

O-ring Code Chart

ABuna-N

DViton®

Seal Seat Material Code Chart

2Cast iron

3

1

See O-ring material code chart

2

See seal seat material code chart

3

Viton® is a registered trademark of the DuPont company

13

Appendix A—Model Number and Identification Code for the PT-Series
(Double Shaft)

Model Number

Base model number PT20 PT25 PT30

Base X X X X X X X

Base model number
(with hydraulic drive option)

PTH20 PTH25 PTH30

Specifications

Strainer

Internal bypass

valve

Bypass valve

spring

Seal O-ring

material

Seal seat material Cast iron Standard Standard Standard 2

Inlet flange

No strainer Standard Standard Standard N

Strainer Optional Optional Optional S

Bypass valve Standard Standard Standard S

Air operated valve Optional Optional Optional A

35 – 50 psi Optional N/A N/A 4

50 – 75 psi Optional N/A N/A 1

75 – 110 psi Standard N/A N/A 2

110 – 125 psi Optional N/A N/A 3

50 – 110 psi N/A Standard Standard 2

110 – 125 psi N/A Optional Optional 3

Buna-N Optional Optional Optional A

®1

Viton

2 in NPT Standard Optional N/A E

2.5 in. NPT N/A Standard N/A J

3 in. NPT N/A N/A Standard P

2 in BSPT Optional Optional N/A M

2.5 in. BSPT N/A Optional N/A N

3 in. BSPT N/A N/A Optional R

2 in. Weld Optional N/A N/A F

2.5 in. Weld N/A Optional N/A K

3 in. Weld N/A N/A Optional Q

Less flange Optional Optional Optional X

Standard Standard Standard D

2 in. NPT Standard Optional N/A E

2.5 in. NPT N/A Standard N/A J

3 in. NPT N/A N/A Standard P

2 in BSPT Optional Optional N/A M

Outlet flange

1

Viton® is a registered trademark of the DuPont company.

N/A = Not Applicable

2.5 in. BSPT N/A Optional N/A N

3 in. BSPT N/A N/A Optional R

2 in. Weld Optional N/A N/A F

2.5 in. Weld N/A Optional N/A K

3 in. Weld N/A N/A Optional Q

Less flange Optional Optional Optional X

14

Appendix A—Model Number and Identification Code for Strainer and
Air Operated Valve (AOV)

Strainer Assembly

Pump Model

PT/PTH20 4684-X

PT/PTH25 4689-X

PT/PTH30 4680-X

1

Strainer Assembly Part
Number

Air Operated Valve Assembly (AOV)

Pump Model AOV Part Number

PT/PTH20 5470-1XA (Buna-N)

PT/PTH25 5462-1XA (Buna-N)

PT/PTH30 5566-XA (Buna-N)

Appendix B—Technical Specifications for the PT-Series

Operating Specifications

Standard connections: 2 in., 2-1/2 in., and 3 in. NPT

Optional connections: BSPT, Slip-on weld

Maximum differential pressure: 125 psid (8.6 bar)

Temperature range: -25° to 300°F (-32° to 149°C)

Maximum working pressure: 200 psi (13.8 bar)

Maximum speed: 780 RPM—all models 20 and 25
640 RPM—all models 30

Maximum flow: Up to 271 GPM (1,026 L/min)

Maximum viscosity: 20,000 SSU (4,250 cP)

Fluids: Refined petroleum products, industrial
solvents, and other fluids

Material Specifications

Part Standard Material Available Options

Case Cast iron ASTM A48

Head Cast iron ASTM A48

Flanges Cast iron ASTM A48

Rotor Ductile iron ASTM A536

Bearing cap Steel Bearing cover / spacer with hydraulic motor

Bearings Ball (single row), grease lubricated to 300°F (149°C) Max.

Vanes Full size with 316 stainless steel wear plate to 240°F

Bypass valve Cast iron ASTM A48 electroless nickel plated

Bypass/AOV cap Cast iron ASTM A48

Bypass valve cover Cast iron ASTM A48

Bypass valve spring Plated steel

Bypass valve spring
ranges

Seal seat Cast iron

Seal metal parts Steel

Shaft Double end keyed shaft, high strength steel

O-rings Viton®

Gaskets Composition to 500°F (260°C)

Vane drivers Case hardened steel

Gage ports 1/4 in. NPT

1

Strainer assembly ordered by part number when not assembled to the pump.

2

Viton® is a registered trademark of the DuPont company.

(115°C); 20,000 SSU (4,250 cP) max.

35–125 psi (2.4–8.6 bar)

2

to 300°F (149°C) Buna-N to 240°F (115°C)

adapter (cast aluminum) and coupling (steel)

15

Appendix C—Performance Curves

PT/PTH20 Pump

1

90

80

640

70

60

50

40

Capacity (gpm)

30

20

10

520

420

275

PT/PTH25 Pump

180
170
160
150
140
130
120
110
100

90

Capacity (gpm)

80
70
60
50
40
30
20

780

640

520

420

275

780

Differential Pressure (psi)

Differential Pressure (psi)

780

640

520

420

275

780

640

520
420

275

8

7

6

Horsepower (hp)

5

4

3

2

2

1

0

1251007550250

16
15
14
13
12

Horsepower (hp)

11
10
9
8

2

7
6
5

4

3
2

1

0

1251007550250

1

These curves depict performance of the PUMP ONLY. Performance will vary in applications due to system design and variables. Approximate

capacities and horsepowers are based on 3 0 SSU (3 cP) fluid.

2

Torque (in•lb) =

RPM

hp x 63025

PT/PTH20 and PT/PTH25 Viscosity Chart

Viscosity (SSU) 100 1,000 5,000 10,000 20,000

Maximum RPM 780 640 520 420 275

16

Appendix C—Performance Curves

PT/PTH30 Pump

1

300
290
280
270
260
250
240
230
220
210
200
190

Capacity (gpm)

180
170
160
150
140
130
120
110
100

90

640

520

420

Differential Pressure (psi)

350

275

640

520

420

350

275

21
20
19
18
17
16

Horsepower (hp)

15
14
13
12
11
10

2

9
8
7
6
5
4
3
2
1
0

1251007550250

1

These curves depict performance of the PUMP ONLY. Performance will vary in applications due to system design and variables. Approximate

capacities and horsepowers are based on 3 0 SSU (3 cP) fluid.

2

Torque (in•lb) =

RPM

hp x 63025

PT/PTH30 Viscosity Chart

Viscosity (SSU) 100 1,000 5,000 10,000 20,000

Maximum RPM 640 520 420 350 275

17

Appendix D—Outline Dimensions for the PT20

5.300

(13.46)

1.125

(2.86)

3.629
(9.22)

5.181

(13.16)

4.000

(10.16)

.500

(1.27)

8.000

(20.32)

0.813
(2.06)

6.079

(15.44)

1.750
(4.45)

1.750
(4.45)

1.500
(3.81)

0.813
(2.06)

8.000

(20.32)

4.125

(10.48)

4.984

(12.66)

Ø.44
(1.12)

4 holes

3.307
(8.40)

3.904
(9.92)

2.500
(6.35)

Inches (centimeters)

2.500
(6.35)

3.307
(8.40)

3.904
(9.92)

18

Appendix D—Outline Dimensions for the PT25

6.048

(15.36)

Ø 1.125

(2.86)

4.000

(10.15)

0.250
(0.64)

5.475

(13.91)

8.750

(22.23)

6.798

(17.27)

2.446
(6.21)

1.500
(3.81)

1.500
(3.81)

2.446
(6.21)

1.750

(4.45)

9.445

(23.99)

5.063

(12.86)

6.348

(16.12)

Ø .44

(1.12)

4 holes

2.750
(6.99)

3.500
(8.89)

4.313

(10.95)

Inches (centimeters)

19

2.750
(6.99)

3.500
(8.89)

3.886
(9.87)

Appendix D—Outline Dimensions for the PT30

6.430

(16.33)

6.93

(17.60)

1.125

(2.86)

4.25

(10.80)

9.63

(24.40)

8.60

(21.80)

1.25

(3.20)

2.19

(5.60)

2.19

(5.60)

2.50

(6.40)

5.38

(13.70)

1.25

(3.20)

9.63

(24.40)

6.44

(16.40)

5.31

(13.5)

0.75

(1.90)

0.63

(1.58)

4 holes

3.00

(7.60)

3.63

(9.20)

5.00

(12.70)

Inches (centimeters)

5.38

(13.7)

3.00

(7.60)

3.63

(9.20)

4.95

(12.60)

20

Appendix D—Outline Dimensions for Air Operated Valve and Strainer

5470-1XA Air Operated Valve (AOV) Assembly for the PT/PTH20 Pumps

3.24

(8.23)

4.23

3.24

(8.23)

3.24

(8.26)

(10.74)

Inches (centimeters)

4684-X Strainer Assembly for the PT/PTH20 Pumps

4.774

(12.13)

3.825
(9.72)

2.250
(5.72)

2.000
(5.08)

Inches (centimeters)

4.000

(10.16)

2.250
(5.72)

21

Appendix D—Outline Dimensions for Air Operated Valve and Strainer

5462-1XA Air Operated Valve (AOV) Assembly for the PT/PTH25 Pumps

3.75

(9.53)

4.48

3.75

(9.53)

3.75

(9.53)

Inches (centimeters)

(11.38)

4689-X Strainer Assembly for the PT/PTH25 Pumps

4.761

(12.09)

3.825
(9.62)

3.155
(8.01)

2.020
(5.13)

Inches (centimeters)

4.040

(10.26)

3.155
(8.01)

22

Appendix D—Outline Dimensions for Air Operated Valve and Strainer

5566-XA Air Operated Valve (AOV) Assembly for the PT/PTH30 Pumps

5.00

(12.70)

5.00

(12.70)

Inches (centimeters)

4680-X Strainer Assembly for the PT/PTH30 Pumps

4.92

(12.50)

3.99

(10.12)

(7.14)

2.81

4.41

(11.20)

5.00

(12.70)

4.75

(12.07)

2.81

(7.14)

2.38

(6.03)

(5.87)

Inches (centimeters)

23

2.31

2.38

(6.03)

Appendix D—Outline Dimensions for Hydraulic Drive Option

10.387

PTH20 Pump

PTH25 Pump

(26.38)

11.136

(28.28)

PTH30 Pump

12.001

(30.48)

24

Appendix E—Part Details for the PT20 with Standard Bypass Valve

19

18

(25 ft•lb)

17

20

5

21

28

29

Note: The PT20 is shown below. All parts for
the PT20 are the same except for the rotor shaft
assembly and blind bearing cap.

22

23

24

25

26

30

31

32

33

34

35

36

11

37

Part Number 4699
Locknut Wrench

4

(15 ft•lb)

3

2

1

10

8

7

6

5

12

11

9

O-ring Code Chart

ABuna-N

DViton®

1

Seal Seat Material Code Chart

2Cast iron

16

13

15

14

13

16

17

19

18

(25 ft•lb)

27

(25 ft•lb)

No. Part Number Description Qty.

1 4667 Bypass valve cap 1

24665

Bypass valve adjustment
stem

1

3 4659 Bypass valve cap gasket 1

4 4613 Drilled - hex head bolt 4

57012-006SF019E

Pan HD phillip 6-32 X3/16
in.-type F plated

2

6 4626 Bypass valve tag

7 4675 Bypass valve cover 1

84647 Spring guide 1

4764 Spring (35–50 psi)—opt.

4765 Spring (50–75 psi)—opt.

9

4676 Spring (75–110 psi)—std.

1

4766 Spring (110–125 psi)—opt.

10 4662 Shaft cover 1

11 4697 D i r t sh i e ld 2

12 4674 Bypa ss valve 1

13 3442 Pipe plug - 1/4 in. NPT 2

14 4767 Bypass valve cover gasket 1

15 4670 Case 1

16 4688 Flange gasket 2

4673 Flange (2 in. NPT)—std. 2

17

4673-1 Flange (2 in. BSPT)—opt. 2

4666 Flange (2 in. weld)—opt. 2

18 7001-037NC125A Hex head bolt 8

19 4695 Flange plug 2 in. 2

38
39

No. Part Number Description Qty.

20 4624 Nameplate 1

21 4677 Vane 4

22 4678 Vane driver 2

23 4671-X2 Rotor shaft assembly 1

24 4653 Shaft key 1

25 2-258_

2

O-ring 2

26 4640 Head 2

27 7001-037NC100A Hex head bolt 16

28 4634-X_

2_3

Seal assembly 2

29 4648 Ball bearing 2

30 4654 Shaft lockwasher 2

31 4655 Shaft locknut 2

32 4657 Bearing cap gasket 2

33 4650 Grease seal 2

34 1343 Grease relief fitting 2

35 4649 Bearing cap 2

36 7001-037NC075A Hex head bolt 8

37 4651 Shaft protector 1

38 2158 Grease zerk 2

39 2159 Lubricap 2

1

Viton® is a registered trademark of the DuPont company

2

See O-ring material code char t

3

See seal seat material code chart

25

Appendix E—Part Details for the PT25 with Standard Bypass Valve

18

(25 ft•lb)

17

16

19

Part Number 4699
Locknut Wrench

4

1

(15 ft•lb)

3

2

6

5

13

12

11

10

9

8

7

19

18

(25 ft•lb)

13

15

14

17

16

28

O-ring Code Chart

ABuna-N

DViton®

1

Seal Seat Material Code Chart

2Cast iron

No. Part Number Description Qty.

1 4667 Bypass valve cap 1

2 4665 Bypass valve adjustment stem 1

3 4659 Bypass valve cap gasket 1

4 4613 Drilled - hex head bolt 4

57012-006SF019E

Pan HD phillip 6-32 X3/16 in.­type F plated

6 4626 Bypass valve tag 1

7 4645 Bypass valve cover 1

84647 Spring guide 1

4646 Spring (50–110 psi)—std.

9

4756 Spring (110–125 psi)—o pt.

10 4662 Shaft cover 1

11 4697 Dirt shi eld 2

12 4643 Bypass valve 1

13 3442 Pipe plug - 1/4 in. 2

14 4660 Bypass valve cover gasket 1

15 4639 Case 1

16 4658 Flange gasket 2

4644 Flange (2-1/2 in. NPT)—std. 2

4644-1 Flange (2-1/2 in. BSPT)—opt. 2

4568 Flange (2-1/2 in. weld)—opt. 2

17

4698 Neck flange (2 in. NPT)—opt. 2

4698-1 Neck flange (2 in. BSPT)—opt. 2

18 7001-050NC175A Hex head bolt 8

29

2

1

20

5

21

30

31

32

Note: The PT25 is shown below. All par ts for
the PT25 are the same except for the rotor shaft
assembly and blind bearing cap.

22

23

24

25

26

33

34

35

36

11

37

38
39

(25 lb•ft)

No. Part Number Description Qty.

19 4735 Flange plug 2

20 4624 Nameplate 1

21 4696 Vane 6

22 4652 Vane driver 3

23 4641-X2 Rotor shaft assembly 1

24 4653 Shaft key 1

25 2-258_

2

O-ring 2

26 4640 Head 2

27 7001-037NC100A Hex head bolt 16

28 4634-X_2_

3

Seal assembly 2

29 4648 Ball bearing 2

30 4654 Shaft lockwasher 2

31 4655 Shaft locknut 2

32 4657 Bearing cap gasket 2

33 4650 Grease seal 2

34 1343 Grease relief fitting 2

35 4649 Bearing cap 2

36 7001-037NC075A Hex head bolt 8

37 4651 Shaft protector 1

38 2158 Grease zerk 2

39 2159 Lubricap 2

1

Viton® is a registered trademark of the DuPont company

2

See O-ring material code char t

3

See seal seat material code chart

27

26

Appendix E—Part Details for the PT30 with Standard Bypass Valve

19 (25 ft•lb)

18

17

Part Number 4699
Locknut Wrench

10

9

8

1

7 (15 ft•lb)

4

3

2

6

5

O-ring Code Chart

ABuna-N

DViton®

1

Seal Seat Material Code Chart

2Cast iron

11

15

12

19 (25 ft•lb)

16

14

13

17

18

33

20

16

34

35

Note: The PT30 is shown below. All parts for
the PT30 are the same except for the rotor shaft
assembly and blind bearing cap.

21

22

23

24 (25 ft•lb)

25

26

27

28

29

30

36

37

38

39

31

14

32

No. Part Number Description Qty.

1 5457 Bypass valve cap 1

2 5581 5/16-18 hex head bolt 1

37101-031NC01A Hex nut 1

4 5597 Bypass/AOV cap gasket 1

57012-006SF019E

Pan HD phillip 6-32 x 3/16"

- type F plated

2

64626 Bypass/AOV tag 1

7 4613 Drilled hex head bolt 4

8 5577 Bypass valve cover 1

95580 Spring guide 1

5579 Spring (50–110 psi)—std.

10

4745 Spring (110–125 psi)—opt.

1

11 5578 Bypass/AOV cover gasket 1

12 5575 Bypass valve 1

13 2270 Shaf t key 1

14 4697-1 Dir t shie l d 2

15 46 09 Shaft cover 1

16 3442 Pipe plug—1/4" NPT 4

17 5596 Flange gasket 2

5573 Flange (3 in. NPT)—std. 2

18

5573-1 Flange (3 in. BSPT)—opt. 2

5593 Flange (3 in. weld)—opt. 2

19 7001-050NC175A Hex head bolt 8

20 5565 Case 1

No. Part Number Description Qty.

21 5569-X2 Rotor shaft assembly 1

22 2-266_

2

O-ring 2

23 4768 Head 2

24 7001-037NC150A Hex head bolt 20

25 4621-X_2_

3

Seal assembly 2

26 5584 Ball bearing 2

27 5591 Lockwasher 2

28 5592 Locknut 2

29 5595 Bearing cover gasket 2

30 1343 Grease relief fitting 2

31 7001-037NC075A Hex head bolt 12

32 5587 Shaft protector 1

33 4624 Nameplate 1

34 5588 Vanes 6

35 5589 Vane driver 3

36 5586 Grease seal 2

37 5585 Bearing cap 2

38 2158 Grease zerk 2

39 2159 Lubricap 2

40 Consult factory Flange plug—3 in. 2

1

Viton® is a registered trademark of the DuPont company

2

See O-ring material code char t

3

See seal seat material code chart

27

Appendix E—Part Details for the PT/PTH20 Air Operated Valve (AOV)

5470-1XA Air Operated Valve (AOV) Assembly

1

No. Part Number Description Qty.

2
3

4

5

6

7

8

9

19

20

5

10

21

11

12

13

11

1 5500 Hex head bolt 3/8-16 x 2.50 SW 4

25457 AOV cap 1

37206-037A Lockwasher 4

45471-X

55471-X Hex nut

6 5471-X AOV adjustment stem

AOV adjustment stem retaining

1

ring

1

1

7 5459 AOV low flow adjustment stem 1

82-217A O-ring 1

9 5470 AOV housing 1

10 5471-X Lockwasher 0.3125 in.

11 5 471- X AOV d i sc

1

12 5471-X AOV diaph ragm

1

1

13 5464 AOV intermediate plate 1

14 5465 AOV diaphragm cover plate 1

15 5471-X Diaphragm valve disc

1

16 5460 #10-24 x 1 flat head cap screw 2

17 4767 AOV ga s ke t 1

18 475 5 Spring 1

19 7012- 0 0 6 SF019E

Pan HD phillip 6-32 x3/16”-type
f plated

20 4626 Bypass/AOV tag 1

21 2854 Pipe plug 1

1

Not sold separately. Only available with 5471-X air operated valve (AOV)

diaphragm assembly.

1

3

1

1

2

2

1

2

12

14

15

16

17

18

28

Appendix E—Part Details for the PT/PTH25 Air Operated Valve (AOV)

5462-1XA Air Operated Valve (AOV) Assembly

1

No. Part Number Description Qty.

1 5501 Hex head bolt 3/8-16 x 2.75 SW 4

25457 AOV cap 1

37206-037A Lockwasher 4

45466-X

55466-X Hex nut

6 5466-X AOV adjustment stem

AOV adjustment stem retaining

1

ring

1

1

7 5459 AOV low flow adjustment stem 1

82-217A O-ring 1

9 5462 AOV housing 1

10 5466 -X Lock washer 0.3125 in.

11 5 466 -X A O V d isc

1

12 5466-X AOV diaphr agm

1

1

13 5461 AOV intermediate plate 1

14 5463 AOV diaphragm cover plate 1

15 5460 #10-24 x 1 flat head cap screw 2

16 5466-X Diaphragm valve disc

1

17 466 0 AOV ga s ke t 1

18 4757 Spring 1

19 7012- 0 0 6 SF019E

Pan HD phillip 6-32 x3/16”-type
F plated

20 4626 Bypass/AOV tag 1

21 2854 Pipe plug 1

1

Not sold separately. Only available with 5466-X air operated valve (AOV)

diaphragm assembly.

10

11

12

13

11

2
3

4

5

6

7

8

9

5

19

20

21

1

3

1

1

2

2

1

2

12

14

15

16

17

18

29

Appendix E—Part Details for the PT/PTH30 Air Operated Valve (AOV)

5566-XA Air Operated Valve (AOV) Assembly

1

No. Part Number Description Qty.

1 5501 Hex head bolt 3/8-16x2.75 SW 4

27206-037A Lockwasher 4

35457 AOV cap 1

45570-X

5 5570-X Hex nut (locknut)

6 5570-X AOV adjustment stem

75459

AOV adjustment stem retaining

1

ring

1

1

AOV low pressure adjustment
stem

82-217A O-ring 1

9 5566 AOV housing 1

10 5570-X Lockwasher 0.3125 in.

11 5 570 -X A O V dis c

1

12 5570-X AOV diaph ragm

1

1

13 5568 AOV intermediate plate 1

14 5576 AOV diaphragm cover plate 1

15 5570-X Diaphragm valve disc

1

16 5578 AOV gasket 1

17 5460 #10-24 x 1 flat head cap screw 2

18 5579 Spring 1

19 7012- 0 0 6 SF019E

Pan HD phillip 6-32 x 3/16 in.
type F plated

20 4626 Bypass/AOV tag 1

21 2854 Pipe plug 1

1

Not sold separately. Only available with 5570-X air operated valve (AOV)

diaphragm assembly.

10

11

12

13

11

2

3

4

5

6

19

7

8

9

5

20

21

1

3

1

1

1

2

2

1

2

12

14

15

16

17

18

30

Appendix E—Part Details for the PT/PTH20 Strainer

4684-X Strainer Assembly

6

5

4

3

2

1

3

8

1

7

No. Part Number Description Qty.

1 7001-050NC125A Hex head bolt 8

24685 Strainer cap 1

3 4658 Flange gasket 2

4 4686 Strainer basket 1

5 4684 Strainer body 1

6 4688 Flange gasket 1

7 4698 2 in. NPT flange 1

8 7001-037NC100A Hex head bolt 4

31

Appendix E—Part Details for the PT/PTH25 Strainer

4689-X Strainer Assembly

3

2

1

3

7

6

3

5

4

1

No. Part Number Description Qty.

1 7001-050NC100A Hex head bolt 8

24691 Strainer cap 1

3 4658 Flange gasket 3

4 4690 Strainer basket 1

5 4689 Strainer body 1

6 4644 2.5 in. NPT flange 1

7 7001-050NC175A Hex head bolt 4

32

Appendix E—Part Details for the PT/PTH30 Strainer

4680-X Strainer Assembly

1

2

3

3

4

5

3

1

No. Part Number Description Qty.

1 7001-050NC125A Hex head bolt 8

2 4682 Strainer body cap 1

3 5596 Flange gasket 3

4 4681 Strainer basket 1

5 4680 Strainer body 1

6 5573 3 in. NPT flange 1

7 7001-050NC175A Hex head bolt 4

6

7

33

Appendix E—Part Details for the PT-Series Hydraulic Drive Adapter

7

6

5

4

3

1

2

1

9

8

PTH20 and PTH25 Hydraulic Drive Assembly
4899-X1 (1-1/8" x 1" Bore Size)

Ref

Part Description Qty

No.

11380-1

1

2

4895

1

37301-120MC040A

44899 Hydraulic adapter 1

5 1343 Grease relief fitting 1

6 4679 Grease seal 1

7 4657 Bearing cap gasket 1

8 2158 Grease zerk 1

9 7001-037NC100A 3/8-16 x 1 hex head bolt 4

CJ 28/38 coupling
(1-1/8" x 1")

Hydraulic lockring 1

M12 x 1.75 x 40 metric hex
head bolt

PTH30 Hydraulic Drive Assembly
4898-X1 (1-1/8" x 1" Bore Size)

Ref

Part Description Qty

No.

1

2

11380-1

1

2

4897

1

37301-120MC040A

44898 Hydraulic adapter 1

5 1343 Grease relief fitting 1

6 5586 Grease seal 1

7 5595 Bearing cap gasket 1

8 2158 Grease zerk 1

9 7001-037NC100A 3/8-16 x 1 hex head bolt 6

CJ 28/38 coupling
(1-1/8" x 1")

Hydraulic lockring 1

M12 x 1.75 x 40 metric hex
head bolt

1

2

4898-X2 (1-1/8" x 1-1/4" Bore Size)4899-X2 (1-1/8" x 1-1/4" Bore Size)

Ref

Part Description Qty

No.

11380-2

1

2

4895

1

37301-120MC040A

CJ 28/38 coupling
(1-1/8" x 1-1/4")

Hydraulic lockring 1

M12 x 1.75 x 40 metric hex
head bolt

1

2

44899 Hydraulic adapter 1

5 1343 Grease relief fitting 1

6 4679 Grease seal 1

7 4657 Bearing cap gasket 1

8 2158 Grease zerk 1

9 7001-037NC100A 3/8-16 x 1 hex head bolt 4

1

Used on models shipped prior to December 1, 2009. The hydraulic lockring is not necessary for the operation of the pump.

Ref

Part Description Qty

No.

11380-2

1

2

4897

1

37301-120MC040A

CJ 28/38 coupling
(1-1/8" x 1-1/4")

Hydraulic lockring 1

M12 x 1.75 x 40 metric hex
head bolt

44898 Hydraulic adapter 1

5 1343 Grease relief fitting 1

6 5586 Grease seal 1

7 5595 Bearing cap gasket 1

8 2158 Grease zerk 1

9 7001-037NC100A 3/8-16 x 1 hex head bolt 6

34

1

2

Appendix F—Trouble Shooting Guide for the PT-Series Pump

In diagnosing pump and system troubles, record the following data during product transfers:

1. Pressure at pump suction.

2. Pressure at pump discharge.

3. Pipe size and length of suction and discharge lines.

4. Pump speed if practical.

Problem Cause Solution

Low capacity Pump speed too slow Check engine speed and PTO ratio. Consult pump performance
curve. Use tachometer on pump if speed is questionable.

High differential pressure Restriction in discharge piping or hose too small.
Pump speed too high.

Clogged strainer Clean strainer.

Suction pipe too small Indicated by pump inlet pressure dropping several
or restricted pounds when pump is started. Remove restriction
or modify piping.

Worn vanes Replace.

Worn sideplates Reverse or replace sideplates. Check universal drive
assembly to make sure angularity is within limits, yokes
are parallel and slip-joint is greased. Check bearings.

Vanes sticking Remove vanes and clean out foreign material
(check strainer). Replace vanes if swollen.

Pump runs Valve closed Check valves. Make sure tank valve is open!
but no  ow

Broken shaft Disassemble and inspect pump. Repair if necessary.

Defective meter Service meter.

Pump will not turn— Foreign matter in pump Clean out the pump— check strainer in suction line.
locked up

Has pump been operated dry? Then, check for damage
to cam and rotor shaft assembly.

Bearing seized Replace pump bearings. Grease monthly. Use ball
bearing grease manufactured for intended service.

Moisture frozen in pump Let thaw and break loose carefully.

Will not build Poor suction conditions Clean inlet strainer. Increase pipe size.
pressure

too low or stuck open

Worn vanes Disassemble, inspect and repair as necessary. Has pump been
and/or sideplates run dry? If so check for damage to vanes & rotor-shaft assembly.

Pump is noisy Cavitation from poor Clean inlet strainer. Increase pipe size.
suction conditions

Vanes sticking Remove vanes and clean out foreign material
(check strainer). Replace vanes if swollen.

Bearings worn Replace if necessary— grease monthly.

Check for restriction in discharge line. Delivery hose

and meter differential valve.

PTO shaft vibration Inspect and repair driveline component.

Pump leaks
around shaft
a light oil  lm on O-rings. Has pump been run dry? If so check

for damage to vanes & rotor-shaft assembly.

Refer to manufacturer’s instructions.

Vanes broken Clean out pump carefully and replace vanes.

Internal bypass valve set Check valve or set valve for higher pressure (see instructions).

Very high differential
pressure

Seal or O-rings failed Inspect seal assembly and replace if necessary. Keep

new seal very clean when replacing seal. Recommend

Check vapor release  oat assembly on meter air eliminator

too small and too long? Slow down pump!

35

Appendix G—Flush and Storage Instructions for the PT-Series Pump

If a PT-Series pump is removed from service for some time, the pump must be protected. Piping and tanks not in service
should also be protected, as the rust particles can destroy the pump’s seals almost immediately after start-up.

1. Fill or thoroughly flush the pump with a light rust inhibiting oil. If the pump is flushed with oil, place some desiccant
packets inside the pump for added protection.

2. Plug all pump openings.

3. Store in a dry location.

4. Before placing the pump back into service, drain the oil and remove any desiccant packets.

5. Refer to “Operation of the PT-Series Pump”.

36

Corken

Faure Herman

Liquid Controls

Liquid Controls Europe

Liquid Controls India

Liquid Controls Sponsler

SAMPI

Toptech Systems

CORKEN, INC.

3805 N.W. 36th St., Oklahoma City, OK 73112
(405) 946 -5576 • FAX [phone]
http://www.corken.com • [e-mail]

LIQUID CONTROLS

105 Albrecht Drive, Lake Bluff, IL 60044-2242
1-800-458-5262 • [phone] • FAX [phone]
http://www.liquidcontrolsgroup.com • [e-mail]

Printed in the U.S.A.

December 2009