This Tech Tip is one of a growing series of tips to share some of the knowledge we have acquired over the past 100+ years of business. This tip focuses on pulleys for Perkins water pumps for the 4.154 and the 4.108 model engines.
An Initial Note
While we have all seen six-sheaved pulleys on a crankshaft, water pump shafts aren’t quite as robust. To avoid side-loading problems that can shorten the life of your water pump, we recommend no more than three sheaves on water pump pulleys and to make sure you are not over-tensioning your belt.
Perkins 4.154 Raw Water Pumps
For some time now Perkins has supplied neither the pulley (PN NA003419) nor the pump (PN NA005576) for their 4.154 marine engines. Sherwood, the manufacturer of the H5 pump fitted to these engines, never supplied a pulley. To support our customers Foley Engines had custom-made replacement pulleys fabricated. Because this was done in limited production runs the per unit cost was relatively high. To mitigate that, we eventually formed an alliance with Jabsco as they developed a raw water pump and pulley package that solved this problem. Today, there are fewer of the Perkins 4154 engines in operation yet we still maintain a supply of pumps and pulleys to keep our customers up and running. Give us a call at 866-821-2454 and let us help you find the right solution.
Perkins 4.108 Circulating Pump Pulleys
When developing our Perkins 4.108 “Not Your Father’s 4.018” program, in order to be able to provide a serpentine belt system to allow for higher powered alternators, we had to solve the problem of both an auxiliary crankshaft pulleys and two sheave water circulating pump pulleys for the 4.108. We still have a stock of these pulleys that are available separately so that you can carefully have them pressed on to the .590 OD shaft of a new water pump. These double groove pulleys are ideal for people who want to run a double belted, high output alternator (Balmar suggests two belts for alternators above 100 amps) or like the added security of a double belt set-up. Give us a call at 866-821-2454 so we can help you find what you need.
If you need a water pump for your Perkins 4.154, whether you have the UK or the Japanese variety, you can find them here on our website. If you want to learn how to install a pulley on your pump, we have a tip for that too: Tech Tip #9: How to Install a Continental or Perkins Water Pump Pulley
