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I sure doubt if it is the air conditioner!!!! I see a cable hooked to the tow eye,, Is there another truck pulling????

Paul, I replace the seal, and the unit is entirely brand new. The hinge itself moved what I’d considered normal, but I will try to lube it up real good tomorrow. I’ll double check as well and make sure it’s not all bound up. If I am hearing some sort of function from the driver seat when I move the switch, would that indicate everything under the dash is working properly, and potentially the vent itself is bound up?

I'm thinking high beam, low beam and parking light in the lower light and the upper is high beam only Paul

I'm thinking a squirt of normal engine oil would help a lot as the seal is probably dry as chips Paul

I had to call her an early night as we are in the beginning of an ice storm up here in the mitten state. After work tomorrow I’m going to the hardware store because amongst the chaos in the shop, I put my wiper arm nuts in the wrong special spot so I could remember where I put them. So with any luck, would any of you gentlemen/ladies off the top of your head by chance know what size/thread/all that fun jazz nuts I need? It stalled progress tonight and that’s the only thing keeping it in the shop as of the moment lol. Thank you all!

So my r model project is almost complete. Down to buttoning up a little bit of this and a little bit of that. This things been both a dream, and a headache. But it’s gonna be worth it. Anyways. I bought a new cowl bent as my other one was brittle and broken and the hinge had seized. When I brought the truck home, the vent was disconnected already. Nonetheless, I hooked up the linkage, and aired the truck up to check my cab ride height. Looks good. When I slide the switch over, it clicks, makes the “door” of the vent budge a small bit, and that’s it. I decided to call it a night. I am seeking knowledge from the Mack community on what to look for, after I get out of work tomorrow. I’ll unhook it to start and see if the linkage moves. To be fair I don’t know how these work, and am absolutely willing to learn. Thank you, and i appreciate the future advice! God Bless.

The Cal Codes are important, but the engine will run good until it learns how its running. Not entering the Cal Codes is not the issue here..

So I have learn some read off the intake sensor and mine has no wiring or bracket for it just a pig tail zip tied and I get no blink code and my lightning bolt definitely works, but what would it do if the eup codes where not entered in the computer

A/C leaking water ?

1961 B613SX parts truck for sale. It was a heavy tandem dump, now just a cab and chassis. I used it for parts to restore a B61. No engine or transmission. Very decent triple frame. 12,000 lb front axle, SWD68 50,000 lb rear bogie. 7.49 ratio. 22" Dayton Wheels. Cab and fenders could be restored or at least used for patches on your B. $500.00 Title available at extra cost. Have lots of other B model parts also. Located 20 miles north of Scranton PA. Call 570-two 2 two-4478. Steve

another cost cut back. early bellhousings had the bottom inspection/ grease cove also the top ribbed vent cover. excessive heat in some bellhousings was lessened with top vent. easier/ cheaper to manufacture bellhousing without top vent

Just go back a few pages. He posted pictures

I better go back to page one "check on the damaged thrust bearing, then make a second Yukon . to have with my Chinese lo mien. someone dumping the clutch regularly would possibly effect the crankshaft.

His front crankshaft thrust bearing was damaged. So we started chatting about the forward forces on the crank that would have damaged the thrust bearing.. I even doubted myself when I knew I was right about my Boo Boo doing that job.. I guess I need another shot of Potato Juice. 🍻

think I need another Yukon Jack BUT the pilot bearing wear would have very little to do with the push/pull clutch arrangement. clutch disc sliding on a pilot shaft SHOULD have slight wear on a bearing. that much movement on the pilot shaft would indicate another problem with transmission front bearing ???yes/no ??

spot on with that response.;; Mack to Mack power trains the rear engine mount is on the transmission. when a "foreign transmission "is used having rear engine mounts ON the engine bellhousing< a rear support hanger is used on the transmission. as always there are exceptions to the rule . a Mack engine with rear bellhousing mounts coupled to a RR could possibly eliminate the rear hanger mount.

Yep.. I just realized i was too quick to doubt myself.. I did a do over on my math..

I may be screwed up. Pull clutch would wear the rear side(pulling crank towards rear). The pilot bearing would wear front due to crank being pushed forward. Time to relax before I get too wacked out on my thinking.

way over due.

Oops. Your right, I just did the math.... 🙃

Yes, it has snap ring but that would put pressure on the back side. Have to dig under cover but I think my 237 had snap ring also.

🍻

"pretty weak"is associated with lifting weights. building engines doesn't matter if one or ten are built. each one becomes a learning experience. to the builder. the self willingness to learn more is the difference between a "mechanic" and a professional engine technician. fortunately this site has many professional technician for us to learn from.

You are one up on me....this is my first! It's just an engine but they all have their quirks. I just keep reading the manual to get ahead of things coming up. Guess I didn't read far enough 😆. Didn't dig deep enough into the parts box to see them on the bottom under everything.

I do have another question... was there a snap ring on the pilot bearing? Im asking because if it was there but shouldnt be and the trans mounted would push the crankshaft forward putting excess pressure on the front thrust bearing causing that wear? I almost made that mistake in an Int. 8100 . I put a clutch in it, but couldnt get the trans to mate up, by 1/8". Somehow i figured out the snapring i left on the bearing was the issue. Removed it, seated the bearing.... good to go....