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Cummins Pt Fuel Pump Calibration Manual

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Here is the fuel pump model and The fuel code for the fuel pump and day of birth. Attached Files: txt 350.txt (1.77 KB, 24 views) glenn akers Offline itali83 Avatar / Picture Registered: 12/19/07 Posts: 136 Old post 03/10/08 at 01:19 AM Reply #13 Thanks Glenn, Now all I need is the fuel pump book that will give me the specs and how to.

  1. Cummins Pt Fuel Pump Adjustments
  2. Cummins Pt Fuel Pump
  3. Cummins Pt Pump Fuel Pressure
  4. Cummins Pt Fuel Pump Calibration Manual Diagram
  5. Cummins Pt Fuel Pump Calibration Manual Pdf
  • This manual covers the calibration instructions for the Cummins PT (type G) fuel pump on test stands made or approved by Cummins Engine Company, Inc., and equipped with an accurate flowmeter and orifices. A binder is available for your PT (type G) manual.
  • I gravity fed it with a fuel can from up high, with the same results. The fitting with o ring that connects into the filter housing is brand new. I also put a new fuel filter on. So at this point the way I see it, either the fuel filter housing is cracked or the pump is having a problem. I do not think the housing is cracked.
  • MACHINE MODEL

Cummins – PT Fuel System Manual Download

  • This shop manual may contain attachments and optional equipment that are not available in your area. Please consult your local distributor for those items you may require. Materials and specifications are subject to change without notice.
  • WARNING: Unsafe Use of this machine may cause serious injury or Death.Operators and maintenance personnel must read this manual before operating or maintaining this machine.
    This manual should be kept near the machine for reference and periodically reviewed by all personnel who will come into contact with it .
  • This manual presented for you in electronic format you can just print out the page you need then dispose of it when you have completed your task. this manual has detailed illustrations as well as step by step written instructions with the necessary diagrams or pictures. these manuals are your number one source for repair and service information & specifically written for the do-it-yourself as well as the experienced mechanics worldwide used to use this factory manual to fix your vehicle. using this repair manual is an inexpensive way to keep your car working properly. it is this level of detail, along with illustrations, that guide the reader through each service, repair & maintenance procedure.
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  • Manufacturer Part Number: See on poster
  • Covered Serial Numbers in Description.
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In the previous article, we talk about Cummins engine electric fuel control governor, this article will turn to introduce Cummins generator engine actuator.


Actuator Description

The actuator is an electromagnetic rotary solenoid valve. The actuator is installed in the EFC cavity of the PT fuel pump. The actuator controls the engine speed and horsepower by controlling the fuel flow to the injectors.


The actuator shaft will turn when the current from the governor control changes.



The current from the governor control will change when the magnetic pickup senses a change in the engine speed.



Fuel Flow Through the Fuel Pump

The throttle shaft is set in the full open position. The fuel flows through the fuel pump to the actuator (EFC) cavity.



The actuator controls the fuel flow to the injectors. The fuel flows through the actuator to the shutoff valve.



Actuator Identification
Two styles of the actuator are now available.
a. Normally open
b. Normally closed



The normally open actuator is in the full fuel position when the electrical system is turned off.



The normally closed actuator will stop the fuel flow when the electrical system is turned off.



The actuators are available in low, high, and ultra high flow.



The actuators are rated at 12 or 24 volts D.C.

Make sure the governor control voltage is the same as the actuator voltage rating.



EFC Fuel Pump Housing

When a new EFC fuel pump is built at Cummins, the pump will have an EFC housing.

The EFC fuel pump housing can be identified in the following areas:

The AFC no-air adjusting screw hole has been omitted.




The ASA or AFC vent hole, in the top of the housing has been omitted.

The AFC spring seat groove is not machined. A 45 chamfer is at the EFC actuator mounting surface.



Actuator Removal From an EFC Fuel Pump Housing

Remove the actuator wires and capscrews.

Cummins Pt Fuel Pump Adjustments

Caution: Do not pry the actuator from the housing. This can damage the actuator shaft and make it stick.



Twist tho actuator and pull it from the housing. Remove the three O-rings from the actuator.



Actuator Installation in an EFC Fuel Pump Housing

Install a new O-ring on the 50 mm [2 in] diameter of the actuator. Install two new O-rings on the actuator barrel.



Apply the actuator rated battery voltage across the two terminals on the actuator to test the solenoid and to observe actuator operation.The actuator will make a loud click when the actuator shaft hits the internal stop. Removing the voltage from the actuator terminals will allow the force of the springs to return the actuator shaft to its original position. A click must be heard when the voltage is removed.

NOTE: The EFC housing does not require the EFC plug in the bottom of the EFC housing bore.



Lubricate the two barrel O-rings with clean engine oil. Insert the actuator in the fuel pump housing. The actuator flange will be approximately 3/8 inch [9.5 mm] from the pump housing.



Use the palm of the hand. Firmly push and rotate the actuator approximately 30 degrees until the actuator flange contacts the fuel pump housing. Rotate the actuator until the mounting holes are aligned.



Install the three 1/4-20 x 1 1/4 inch hex head capscrews. These capscrews have captive spring washers and do not require lock-washers. Tighten the capscrews until they are finger tight.



The actuator capscrews must be tightened in the following sequence:

1. Tighten the mounting capscrews 1/8 of a turn, in the sequence shown in the figure, until they are seated.



2. Tighten the capscrews in sequence to 25 in-lb [2.8 N*m] torque.



3.Tighten the capscrews in sequence to a torque in-lb. [5.6 N*m].



4. Loosen all three capscrews completely.



5. Tighten the capscrews again in sequence to 25 in-lb. [2.8 N*m] torque.

6. Tighten the capscrews again in sequence to 50 in.lb. [5.6 N*m] torque.

7. This procedure will make sure that the actuator is properly installed and is not binding.

A final check is to apply and remove battery voltage across the two actuator terminals. The operation of the actuator must have a similar sound as it did before installing in the fuel pump housing. If the actuator does not click, as if it is not operating, or operating slower than before, loosen all of the capscrews and tighten them again as described in the previous procedure.

Caution: This test will only verify that the actuator will go from the full open to the full closed position. A slight binding of the actuator shaft can cause a governor stability complaint. This test may not detect a slight binding.



The fuel pump can now be calibrated (Refer to the Fuel Pump Calibration Manuals or the monthly Cumulative Supplement Update).

NOTE:Apply the actuator rated battery voltage to the normally closed actuator when the fuel pump is calibrated.



Cummins Pt Fuel Pump

The throttle shaft must be locked in the full open position. After the calibration, the fuel pump can be mounted on engine.



Actuator Installation in an AFC Fuel Pump Housing

Remove the fuel pump if it is on the engine.

Remove the ASA, if required, and the AFC fuel drain tube. Install a plug in the housing. Install a plug in the fuel tube connection.



Remove the AFC no-air plug, if the fuel pump does not have an AFC. Replace it with the no-air needle valve. The AFC no-air plug is located directly above the throttle shaft.

Tighten the AFC no-air needle valve in the housing to 25 in.lb. [2.8 N*m]. Tighten the jam nut.



Remove the AFC cover plate. Remove the AFC bellows/plunger assembly, if required. Use a pair of snap ring pliers to remove the barrel or barrel plug snap ring.



Thread one of the previously removed 1/4-20 capscrews into the AFC barrel plug. Pull out the barrel plug with a pair of pliers. Discard the three original AFC cover plate capscrews.

If the fuel pump has a functional AFC, use the AFC barrel puller. Service Tool 3375599 to remove the barrel. The AFC cannot to be used with an EFC governor. The AFC cavity is now ready for the installation of the EFC governor actuator.



Install the O-ring plug on the Governor Plug Tool, Part No. 3376457, approximately three turns. Install the O-ring on be plug.

Cummins Pt Fuel Pump Calibration Manual

Caution: Do not tighten the O-ring plug to the plug tool or the tool can not be removed after the plug is inserted in the pump AFC cavity.

Lubricate the O-ring with clean engine oil.

Press firmly until the O-ring plug is seated in the pump housing. Carefully unscrew the plug tool.



Install the EFC gasket on the actuator. The gasket will fit only one way. The fuel pump side goes against the fuel pump.

Caution: Do not use any gasket adhesive or sealant on this gasket.

Cummins Pt Pump Fuel Pressure

Check that all of the mounting holes can be aligned. Install the O-rings on the shaft.

Cummins Pt Fuel Pump Calibration Manual Diagram


Cummins Pt Fuel Pump Calibration Manual Pdf

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