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Does anyone have a part number for the socket needed to get this nut off? Looks like a 2 or 2-1/8 inch nut. I don't have any thin-wall sockets this big. Maybe a spindle-nut socket? But I don't have any that small.
Trying to get this parking brake drum off so I can reseal the mainshaft and countershaft covers, and I guess, while I'm at it, maybe put new shoes on if needed.
1969 F-600 / NP541OD transmission.
Thanks.
when you determine the size , buy a standard ( non -impact ) socket & then you may have to grind on the OD of the socket with a bench grinder until it fits , also this is a perfect job for an impact wrench good luck
I might do that. We've had to do it at work. The input flange on FMTV axles are tight like this. We just took a chrome socket to our in-house machine shop and had them turn it down to fit. After many uses, it would eventually crack and we'd have to do another one. I would expect mine to last the rest of my life as it won't be getting that sort of heavy use every day. If I do that, I'll get it machined rather than ground. Less heat stress and looks better. Thanks.
Looks like 372040-S (MM-177). Looks like nylock, so you may want to pick up a new one, as nylocks are one-time-use parts. Lots available for around $10: https://www.ebay.com/sch/i.html?_nkw=372040-S
Now, other places in the MPC it states, "approx. 2"", so I wouldn't take that as gospel, and AI (Gemini) opines 1-7/8", but AI is mostly crap at answering questions like this. I think 2" is probably a good guess. This nut may be used on NP 4-speeds too.
Yep, I've got that picture also. My plan for today was to take that nut p/n and see if I can buy one, then get a socket that fits it and then measure the drum cavity and have the socket turned down to fit. I will also have questions later about my pto and pto pump. They both work but they both also leak like a rusted-out bucket. I'd like to find rebuild kits for them but I've got a feeling I may have to replace with new components. Specifically the pump. There's no manufacturer indicated on the pump. There are some numbers cast into the body. The numbers on there own don't bring up anything pertinent. Adding "pump" or "pto pump" with the number doesn't bring up anything specific. DC3 22 121 and CCH-12-101 are the numbers cast in. The pto is a Spicer unit. Model number is GCMNK6-14X. The C is stamped over a B. Don't know what that means. Modified on a previous rebuild? I couldn't find anything last night while doing a search. Taking that number to NAPA today to see if they can come up with anything. Btw, I will admit that I suck at doing internet searches and I get frustrated fairly early on with the tons of crap that comes up during a search. Thanks.
Internet search as been severely broken for at least three years, when instead of returning relevant results, the engines started pushing results that paid them the most. Everything is fuzzy results now, even DDG's results. FBM was always terrible, NAPA's never worked well, Google went south, then eBay's search engine started letting trash in. It's bad everywhere, compared to a decade ago when I knew the ways to craft precise results well. Now all of them will show you unrelated crap as long as you'll keep scrolling. Eyeball time maximization.
Decided to get back to work on the truck this afternoon. Took another look at that parking brake drum cavity and thought I would give it a little wire brushing. Didn't realize that there was that much crud in there. It actually looked like part of the casting when I first looked at it. So with it all cleaned up, I can actually fit my regular socket on it. Chrome socket, the impact sockets are still too big. It's a 2" nut and it was on there tight! Originally tried to remove it using my 1" drive ratchet. I couldn't even budge it. So I hit it with my 3/4 impact. Took a bit of hammering, but it finally broke loose. Somebody has had this apart before. It looks like they tried to seal up the mainshaft tail housing and countershaft bearing retainer/cover with household caulking, like the kind you would use to seal up your tub/shower seams in the house. Idk. I've cleaned everything up and tomorrow (or next week, who knows), I'll get it all sealed up correctly. Regarding the PTO and PTO pump, took those items to a hydraulic shop in another town and they didn't seem too confident that they would be able to find parts for them. I should get a call from them later in the week. Like I said earlier, I'll probably end up buying both new.
. . . pto and pto pump. They both work but they both also leak like a rusted-out bucket. I'd like to find rebuild kits for them but I've got a feeling I may have to replace with new components. Specifically the pump. There's no manufacturer indicated on the pump. There are some numbers cast into the body. The numbers on there own don't bring up anything pertinent. Adding "pump" or "pto pump" with the number doesn't bring up anything specific. DC3 22 121 and CCH-12-101 are the numbers cast in. The pto is a Spicer unit. Model number is GCMNK6-14X. The C is stamped over a B. Don't know what that means.
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