This, our latest Tech Tip, can be used to assist you in timing your Perkins 4.108, 4.236, 4.248 and the Perkins 6.354.  Certain measures need to be taken when removing the fuel injection pump as well installing it.

First, before removing the injection pump make sure you can still see the scribe mark that Perkins put on the engine block.  This can be found on the engine block just under the injection pump flange.  Having a hard time finding this mark?  Locate the other scribe mark on the ear of the injection pump (there are three mounting ears; the mark should be on the one facing away from the engine).  If you do not find this scribe mark on the block than make your own using a knife or other sharp object.  The two lines or scribe marks should be in line with each other.  This will truly save you a huge headache later on when installing the new or remanufactured injection pump.

Next, unbolt the three mounting bolts that hold the pump on to the block.  If you’re working with the Perkins 4.108 marine, 6.354.0 or 6.354.4 marine or industrial the pump will slide straight back and the removal will take no time at all.  If you are working with a later Perkins 4.108 industrial or a 4.107 or 4.108 Westerbeke marine engine one extra step will be necessary (these engines use a Lucas mechanical pump).  See note below if you have one of the later engines mentioned above.

Once you have your remanufactured pump from Foley Engines you’re ready to install.  Locate the splined input shaft on the replacement pump.  This splined shaft will have two splines on it which are either Siamese together or in some case one of the splines will be missing.  This makes the pump shaft go into the drive hub (mounted on the injection pump drive gear) one way only. 

Next, once the pump is in hand tighten the three bolts that mount the pump to the engine.  Here comes the most important part.  The two scribe marks (one on the pump flange, the other on the block) have to be lined up to look like one line (perfectly inline with each other).  This times the engine.  Finally, tighten the three bolts to lock the pump in position.

If you have one the engines in the note located in the removal section: this is the time to re-install the three bolts in the drive hub (make sure you keep that rag in timing cover!).

At this point, the pump is back on, the scribe marks are lined up to time the engine and you are ready to put the fuel lines back on and bleed the system.

For more information on how to bleed the fuel system, check out Tech Tip #29: Bleeding Lucas, Stanadyne and Diesel Kiki Fuel Systems and also Tech Tip #41: Bleeding Perkins, Deutz and Deere Fuel Systems, Part 2.

Speaking of bleeding a Perkins diesel, we have a new spin-on filter kit to replace the hard-to-bleed cartridge-style secondary fuel filter. This spin-on kit comes with a glass Racor filter with a drain valve. Unlike the cartridge filter, you can fill it full of fuel and it makes bleeding the system much easier. See Tech Tip #56: Spin-on Fuel Filters for Perkins Diesels for more information. 

 

We hope that this Tech Tip has been helpful.  We take Tech Support seriously and are pleased to offer this information to the engine community. Please email or call us at 800.233.6539 with any comments or questions on this Tech Tip.

Please call us with any questions. We take tech support seriously!

The Foley Engines Team

Quality Since 1916!

800.233.6539