Perkins 4.108 Serpentine Pulley Kit, Perkins 4.107 Pulley Kit, Westerbeke 40 Pulley Kits

Tel: 804-642-9296
FAX: 804-642-0340

Serpentine Pulley Kits For Perkins Engines

Serpentine Pulley Kits
for Perkins 4.107, 4.108 & Westerbeke 40 Engines

Slipping Belt Problem Solved
on your Perkins 4.107, 4.108 & Westerbeke 40

For Pricing Please Inquire Below

With more and more electronics being used on boats, the demand for more 12v DC amperage is increasing. If you are using a high output alternator on a Perkins 4.107, 4.108 or Westerbeke 40 with a standard belt, you already know the problem.

Trans Atlantic Diesels Inc. can supply an easy to fit serpentine pulley kit K6 (6 groove) for the Perkins 4.107, 4.108 and Westerbeke 40. With this kit you can achieve in excess of 150 amps 12 volts DC without the belt slipping (providing your alternator has the capacity).

Anyone who has tried to extract much more than 65 amps out of the original pulley and belt configuration, will know that black belt dust and squealing from the slippage are all too familiar. Over tightening the belt is not the answer as you will find out in the next paragraph.

Perkins 4.108 Serpentine Pulley Kit

Perkins 4.108 with Bowman manifold and Balmar with 2” mounting foot.

TAD Tech-Assist

Don't Overtighten: An overtightened belt, operated over a period of time, can cause metal fatigue on the front section of the crankshaft. This can result in failure, breaking the crankshaft at the #1 journal. This generally occurs when owners have over tightened their belt in an attempt to stop or reduce slippage. The serpentine belt will not slip using the same recommended tension as used on the “V” belt as shown in the Installation PDF file that you can view or download below.

What's Included in the Kit?
Perkins 4.107 and 4.108 Serpentine Pulley Kit

Note: Westerbeke 40 requires bolt and spacer kit for Standard Balmar with 2” mounting foot: 1x crankshaft bolt 32162316, 1x crankshaft washer 33124119 - as shown above.

When Placing Your Order...
  • We recommend ordering a spare belt. Let us know which alternator you have to ensure we supply you with the correct size pulley, as these will vary between manufacturers. We cover the most commonly used sizes. (Balmar 60, 70 and 90 series and most common Delco)
  • Your kit will include a new water pump with the serpentine pulley already installed
  • For future reference, if you have a 4.107 or a Westerbeke 40, the part # for a replacement water pump using our serpentine pulley system will now be U5MW0054
  • This is a standard 4.108 pump which is fully interchangeable but has a larger diameter shaft than the 4.107 pump
  • The part # for replacing a 4.108 pump is unchanged
  • For our records and future guidance, let us know if you have a 4.107 a 4.108 or a Westerbeke 40

To ensure our Serpentine Pulley Kit will work with your Perkins 4.108, 4.107 or Westerbeke 40 engine, please see the info below and identify which Header Tank set up your engine currently has.

Identify your Perkins 4.108 Header Tank...

to see if it is compatible with our Serpentine Pulley Kit

Perkins 4.108 Header Tank

Figure 1 - 4.108 Bowman combined Header tank/heat exchanger/manifold
Shown in figure 1 is the 4.108 Bowman combined header tank, heat exchanger and exhaust manifold. This unit WILL ACCEPT our Serpentine Pulley Kit.

Perkins 4.108 Header Tank

Figure 2 - 4.108 North American Front Tank
Shown in Figure 2 is the North American front tank as fitted to the 4.108. This configuration WILL ACCEPT our Serpentine Pulley Kit.

Perkins 4.108 Header Tank

Figure 3 - Westerbeke 40 Front Tank
Shown in Figure 3 is the Westerbeke 40 Front Tank. This configuration WILL ACCEPT our Serpentine Pulley Kit.

Perkins 4.108 Header Tank

Figure 4 - Shows 4.108 Low Line Tank
Shown in Figure 4 is the 4.108 Low Line tank. This WILL NOT ACCEPT our Serpentine Pulley Kit without modification to the tank. Contact us for details.