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I've read the NHC250 thread, and I believe that situation is quite different from mine. I have had zero performance issues with this engine, and all of the internal engine components that I investigated reflected the same. I do have a pyrometer installed, and I take action when it gets above...

The subject of this post is my 1990 M923A2 with the Cummins 6CTA 8.3 engine. It was a 2009 "rebuild" at Kansas, including a tag on the front of the engine that says it has standard bore liners and standard size main / rod journals. When I bought the truck from GL in the fall of 2013, it had the...

I got the new yoke, new tin cover, and new seal installed last week, and I finally got a chance to drive it yesterday. I've got the usual grease specs on the axle from what was slung out of the slip joint in the driveshaft, but I don't see anything leaking from or dripping down from the seal...

After I saw this I went and looked up how they are installed and that's exactly what it looks like. I thought it was just some extra seal shield or something. I'd never seen one get installed so I didn't know what to look for. I've only found speedi sleeves installed on a couple things I have...

I worked on this leak again this morning and have what I hope is a positive update. I pulled everything apart again, and put a dial indicator on the pinion and it had no play. I couldn't even get it to register 0.001" travel when hitting it in any direction with a nylon faced hammer. So I don't...

I didn't put a dial indicator on it when I had it apart, but when I put the housing on without the yoke, I couldn't feel anything noticeable. Is there an allowable spec? I have looked through task 5-64 of TM9-2320-272-24-4 and didn't see a measurement for it.

I know the first post is long, but in it I mentioned that I have removed the spring style vent caps and replaced them with DOT air line tubing routed to a filter up next to the washer reservoir. I've verified that it is open. Thanks though.

Interesting, that's a trick I had not heard of before. I'll give it a shot next time I can work on the truck. I took it on a ~150 mile road trip this weekend and judging by the amount of oil under the truck and speckled on the back wall of the van body, it's not slowing down any. Thanks!

Thanks for your help, but I'm confident that's not it. There is zero groove on the yoke, and barely any polishing where the seal lips ride. You can still see the texture from the factory OD grind through where the seal rides. A yoke worn bad enough to have a groove could definitely cause leak...

I've been fighting some pinion seal leaks on the front pinion seal of the middle axle on my M923A2 truck, and am at the point where I'd like to make sure I'm not missing something obvious. My truck was a ~2011 rebuild at Kansas. When I got it, there was a very slow leak at the front pinion seal...

I realize that I have no dog in this fight (and that this derails this thread a bit further off topic), and I mean no disrespect to anyone involved, but WillWagner is correct in his statement that modern diesels dose hydrocarbons into the exhaust stream for DPF regeneration purposes. In...

I did think that this was a Steel Soldiers Haspin shirt, but I'm still in for a Mowron shirt instead. I did bring a mower to the Spring rally last year...

I'd like a Large shirt if it's not too late. Thanks!

If you pull the drive flanges off the front axle (8 bolts each drive flange) and either leave the air shift transfer case disengaged (or pull the front driveshaft if it is a sprag transfer case) then the axle shafts won't be spinning. As long as you can still turn the steering wheel...

That is the 120 psi pressure transducer for the CTIS. If it never sees 120 psi and closes, the CTIS will think the air pressure is low and will just blink highway mode.

It's finally started to get warm here, so I've been able to get back to work on the truck. I finally finished up the wiring on the light bar / A/C unit wind deflector unit that I made and partially installed last Fall. You can never have too much light, right? I had the overhead console and new...

That looks a lot like liner cavitation to me. It's caused by incorrect coolant chemistry. Once it eats through into the cylinder from the coolant side, it leaks coolant into the cylinder and / or oil pan depending on where the piston is in relation to the leak. It also interferes with the liner...

It could be a boost leak. It won't build enough boost revving it out of gear in order to show up. Check the rubber hose of the cross over tube after the turbo, and make sure the clamps are tight.

I do some volunteer work with a Christian camp near where I live, and they have asked me to assist with getting their backup generator operational. It is an MEP-006A unit, obtained through a FEMA grant. They had it installed a few years ago and the power company connected it by a manual transfer...

I have never replaced mine. I was just trying to help out Ford Mechanic. The part number for the stainless bolts is 3929537.