Geoff Weeks

If you get jammed up real bad, here is one, may or may not need your drive on it.Air Starter.

Which bolt has a reverse thread? I can't think of one off the top of my head? Yours is slightly different then the 150's but I don't know of any LH threads on them.

Not much to them, if you can fix your air impact gun, you can work on an air starter.

100# for 7 months? wow, you've got a tight system, I thought mine was good a 4 months and enough are to start.

From his first post, he states no "water" in the oil. There may be blow-by, they may be coolant in the oil he hasn't yet seen, but at present, I wouldn't condemn the engine.

Delphi FL2914 Ebay or your local Autoparts store.

OK they are Mack then.

Well, you have the prescription on how to make a million in trucking down... Start with 2 million!

I was expecting a FC which I think they did put a 5th wheel on one variant.

Are the rears Mack (Top loaders, center section bolt in from the top, or front loaders, bolt in from the front)?

Well, I took that info and went to a junkyard when I was doing my swap. Eaton and Rockwell (Meritor) used common wheel end parts so the bearing and seals as well as bearing spacing were the same. I know Spicer (IHC) use different bearings and spacing on their 12K steers. I have no idea what Mack uses. A junkyard is likely a better place to go than the dealer and new parts. They often know interchange info. In my case hubs off a Ford would work if I changed the outer bearing. In my case the rear axle were common 40K Eaton and IHC's which all take the same stuff as Rockwells also at the 40K level. What rears do you have? What front (steer axle) do you have. Hub Pilot came into being ten years after your truck was made, if the axle models were still in use in the 1990's then you have a good chance that the hubs are available. Many of the Mack's I worked on had heavy front axles, so 5x 16.5 or larger brakes, and heavier bearings than the 12K axles on my tractors.

Info that is going to be helpful is inner cone # outer cone # seal number, brake size. Axle capacity if you know it. That is all I used when changing from stud pilot to spoke.

Wiki has a pretty good definition.

In OTR trucking in this country the weight would be a problem. In buses you likely wouldn't have a problem with an extra 700 lbs, firetruck not a problem, garbage packer maybe or maybe not. I guess that is why they weren't a big seller here. In a country where far too many drivers look a a jake as a noise maker to startle people, they would have no attraction. Your likely looking at a similar weight penalty with a Cat brakesaver, and they were never very big sellers either. With the fact the engine can be ordered OEM with the brakesaver likely made them an easier sell then the Telma which would be a separate sale.

The ones (Telmas) I was around were on LP fueled M.A.N.'s so had a throttle and therefore would not work with a Jake. However if you could justify the weight there is no reason they couldn't be used with an engine Jake as well. Some of the heavy hauler had 3406's with both Jake and Brakesaver, as weight is never an issue when every load is a permit load. I don't know how much they weighed, but there was big rotor on the output (transmission) or input (rear axle) and a stator that surrounds the rotor with a series of electro-magnets in it. So lots of copper and iron. Brakesaver used engine oil to act on a turbine wheel between the engine and clutch. Retarding energy was turned into heat in the engine oil. Cats with Brakesavers have bigger oil coolers then those without. When Cat used an injection pump and nozzles in the head, there wasn't a handy injector rocker to time the Jake like there was with Cummins and 2 stroke Detroits for optimal valve opening. Cat Jake's of that period used an adjacent cyl exhaust rocker to trip the Jake, but its timing wasn't ideal so the retarding wasn't as good as it is with common rail engines. So that is why the Brakesaver hung around until the changes over to common rail fueling. At that point the timing came from the injector rocker, like Cummins. By the time we got the LP buses, mostly the Telam's didn't work, we had enough to do to keep the buses running and Telma's weren't needed in Chicago like they were in Austria where the buses came from. I think may be 1 out of 4 or so worked. Likely needed something simple, but there was never time.