Tech Tip #161: Handy Numbers for Perkins Diesel Owners or Rebuilders

Dr. Diesel
Written by Dr. Diesel


This Foley Engines Tech Tip is the newest one in a series that we publish for the engine community.

Anyone who has ever served in the Army remembers the phrase “Do It by the Numbers.”  Your drill sergeant would break down the most complicated maneuver into a series of numbered steps then announce each step in sequence.  Let’s do the same thing with Perkins marine diesel maintenance.

If you can identify the answers to these questions, you’re ready to order the parts!

Perkins 4108 Diesel Maintenance by the Numbers

Raw Water Pump: Late Vs. Early

Does it have 6 bolt holes or four?

Exhaust Elbow Flange: Late vs. Early

Does it have 5 bolt holes or four?

Fuel pump mounting holes: Late vs. Early

Does it have 4 bolt holes or two?

Fuel Filters: Primary vs. Secondary Filters

Does it have 30 microns or two?

Injection Pump

Are the levers in a vertical tower or do they lay flat along the top of the fuel injection pump?

Perkins 6354 Diesel Maintenance by the Numbers

Fuel Pump mounting holes: Late vs. Early

Does it have 4 bolt holes or two?

Fuel Filters:  Primary vs. Secondary

Does it have 30 microns or two?

Number of secondary fuel filters

Does it have 2 or one?


25 to 50 pounds vs.150 pounds

Number of bolts across the top of the case: four or three?

Borg Warner/Velvet Drive Reduction Gear:  71 Series or 72 Series

Flange Between hydraulic pump housing and reduction gear housing: Is there room for two fingers or one finger on top of the flange?

P.S. We’re still looking for Perkins engine cores. Please call us toll free at 800.233.6539 if you have any.


Dr. Diesel
Written by Dr. Diesel
Knowledge is power. Power to build ties to engine users. To build a relationship with our customers, we share with you our 105 years of knowledge in many ways. We have this special section called “Ask Dr. Diesel™” where you can pose questions about engines, transmissions, industrial hand clutches, exhaust scrubbers, etc.