Rob

The largest problem when remachining vee belt drives is the depth of the the belt riding in the pulley, (sheave) increases where the belt rides. This exacerbates the aforementioned problem as there is little power or torque absorbtion if the belt is bottomed in the groove which will happen if the angled sides are trued to linearity in many cases.

I'll check a couple of them tonight and post up. Be about 19 hours or so however so someone may beat me to it.

Paul;

The name was coined after the inventors name; "Oscar Zerk". It was similar to the grease fitting invented by the Alemite Corp. but the "zerk" locked onto the fitting for a positive hold.

I was in the navy with a guy from down under and he spoke of "Shaggin his Sheila" fairly often....

Found this:

Why is it called a Zerk fitting?

Really wasn't any rhyme or reason but both were common in the 70's with the 13 speeds. Wasn't far into the 1980's when that style was replaced with the 4900 valve.

Last one of those I had had brownish/red ink in the writing and didn't say "Eaton" anyplace. Only "Fuller".

This was mine back in the stock car racing days. I took these photos to send to a gent whom did purchase the truck and he drove it to S. Carolina from central IL.  It was the original 318 engine with 340 "J" heads and ran very well.

1969 Dodge D350:

These folks have helped me in the past with automotive applications. I don't know about heavy trucks:

https://marchperformance.com/tech-support

8 hours ago, mrsmackpaul said:

I typed out a reply must of not pushed submit

 

Anyway I'll have another go

 

Fantastic effort so far

Your vee belts need to be a matched pair, lots of manufacturers say they are matched belts but this isnt exactly true

Say for example yiu have B 85 belts and buy three belts that are meant to be matched, if you look closely at the belts there is another number made up of may 5 or 6 numbers in smaller writing, this number is the matched number and the closer these numbers are to matching the closer the belts are to be matched

 

This isnt some made up B.S. this is fair dinkum and when they numbers are really close the belts (providing the pulleys are in good nick) will run smooth as silk

 

So check the belts out, most spare parts people dont know this, a older spare parts gentlemen showed me this many years ago and it still proves correct today

 

Paul  

A set of calipers easily confirms the measurements between belts. Best not mix brands on the same sheaves, (pulleys, drives, etc.) and stay as close to same dimensions as possible. 

There used to be available a set of "master" blocks for checking wear in the sheaves of "vee" belt drives also but I've not seen any in years. These you would slip into the groove and use a round wire feeler gauge to check for wear in the angled section of the drive.

Many times new belts installed onto worn out drives shorten the life of the belts considerably.

Remember to use your safety cage when inflating tires to remain safe:

Though it won't help if modified post up the number, or photo the tag from the injection pump to decode the pump's original application.

26 minutes ago, tim220225 said:

Just buying a 1988 R688ST. The dash housing has a foam of some type covered with a vinyl.
 

Does anyone know if these are available refurbished or know anyone who rebuilds them?

I had these folks do my 68 Plymouth upper and both lower dash pads and they look new. Don't know if they do large trucks or not.

http://www.justdashes.com/