What opinion do you have?

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rickf
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Re: What opinion do you have?

Unread post by rickf » November 9th, 2022, 5:23 pm

I think the foam was more for physical protection than waterproofing. the engines would have been in a metal box in addition to the foam. Then again, thinking about it the one I got still had the remnants of a cardboard box around the foam so maybe not.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone

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Re: What opinion do you have?

Unread post by m3a1 » November 9th, 2022, 5:30 pm

I'm just going to quickly repeat something I said earlier...I believe it was in the submarine jeep thread.

If you want to know what kind of pressure is exerted on seals when submerged, take any air-filled ball and dunk it in the water. The deeper you dunk it, the higher the pressure and the harder it is to keep it under water.

Now, imagine amphibious vehicles whose hubs are 3, 4 feet or more under water while operating. Those machines are designed (as well as can be expected) for that environment.

The Gama Goat, the DUKW and many others all call for complete servicing including fluid changes after 'swimming'. I have personal experience with both examples (including restoring and swimming a DUKW) and it's just a load of work. And... when your vehicle is 50+ years old, all bets are off.

So unless you are a complete maintenance freak, such things are best left to the folks who run YouTube channels and are willing to damage or destroy things for the money and entertainment or who are running their rigs competitively (preferably with sponsors to foot the bill).

My advice (which is worth precisely what you've paid for it here) is to tippy toe around the puddles as much as is humanly possible.

Cheers,
TJ

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Re: What opinion do you have?

Unread post by rupert's » November 10th, 2022, 12:29 pm

https://youtu.be/_JpFmmIE-WQ
I have already opened the set of spiders and everything seems to be fine, no teeth are missing or I have seen anything strange ... maybe a little wear on the teeth of one of the axles, but that can not cause the noise that is listen in the video of the first post.
I have to look at the pinion shaft bearing, maybe something is wrong there. Cheers

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Re: What opinion do you have?

Unread post by csmith » November 10th, 2022, 7:02 pm

Happened to me, front Dif a couple years ago, replaced it with a good TO and problem solved.
1976 M151A2 4 Color Cammo Mutt, aquired August 09
1976 or 7? M151A2 "Miss Sandy" Driver, aquired May 2010
Former owner M151A2 "Miss Saigon" Vietnam Rescue Sold Sept 09
Fond appreciation for the M151 Breed!!

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Re: What opinion do you have?

Unread post by rickf » November 10th, 2022, 8:09 pm

I have watched that video many times now and it is definitely related to that one spot in the rotation. That has to be tied to the axle or side gear in the differential unless it is sound transferring through the axle from the wheel bearing. Did you try turning it without the axles in to see if it still made that sound? If so I would suspect that carrier bearing from looking at the rust pockets on the rollers. This is assuming that all the teeth are good on the ring gear and side gears. The pinion would make a much different sound and it would be 4.6 times for every revolution of the wheel. It might be less if the spiders are turning and the opposite wheel is turning backwards but it would never be every single revolution on the dot of the wheel.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone

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Re: What opinion do you have?

Unread post by Lou » November 12th, 2022, 7:59 pm

How is the play in the U joints? Notice the noise only happens when the axle shaft is in a certain position? :?:
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Louie
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Re: What opinion do you have?

Unread post by rupert's » November 13th, 2022, 4:02 pm

Lou wrote:
November 12th, 2022, 7:59 pm
How is the play in the U joints? Notice the noise only happens when the axle shaft is in a certain position? :?:
The set of U-joints is a year and a few months old, and I have also not seen the crosses rubbing anywhere, and now with the differential removed it cannot be seen. I have assumed that it is the bearing, I am going to change it to see if it is solved. Maybe I change the two output bearings.

As an anecdote... this weekend when I was riding with the mutt without the front differential, the gearbox outlet flange came off and all the gearbox oil was drained. Luckily it was standing still and nothing was broken.

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Re: What opinion do you have?

Unread post by rickf » November 13th, 2022, 4:21 pm

Yes, there is nothing to hold those yokes in once the drive shaft is removed. As the oil heats up an things start to loosen up the yoke will slide right off. I had the same thing happen to me, luckily I was not too far from home and someone behind me saw it happen and flagged me down. That is definitely a very fast way to drain the transmission!
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone

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Re: What opinion do you have?

Unread post by m3a1 » November 14th, 2022, 12:13 pm

Been There, Done That Achievement Badge- AWARDED!

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Re: What opinion do you have?

Unread post by rupert's » November 16th, 2022, 1:19 pm

Good! In the end I have decided to change the two output bearings, I will have them at home next week. I have read the differential manual and have looked at the differential guide posted here several times. (this guide is easier to understand than the manual) Thanks to armybuck041 for posting it.

I have a little doubt:
1st I install the two bearings and the 2 tracks
2nd I approximate the adjustment crowns.
3rd I hold the output flanges and tighten the adjustment crowns a little.

I no longer have to do anything else because I only changed the output bearings. I have not touched the bearings of the crown shaft and that is why I do not have to do the "backlash configuration" is this true?

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Re: What opinion do you have?

Unread post by rickf » November 16th, 2022, 4:16 pm

If you are just changing the carrier bearings then you will not have to readjust the pinion depth. You will still have to adjust the backlash but this is easily done with the threaded adjusters on the carrier bearings. If the pinion was properly set to begin with then you should be able to get a proper pattern on the gears. Set the backlash according to the manual. I don't remember the specs.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone

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