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Working on the M1078 LMTV

T

tennmogger

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mkcoen said:
It would have been worth the price for me to do it if I could have avoided this. I don't think you can ever be sure unless there's a failure but the military must have had some reason to go back and change things. It should be a more solid foundation since you're actually bolting the fan to the clutch not pinching it between the clutch and another piece of aluminum.
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When you said "the military must have had some reason", it raises the question if there is a database somewhere that would disclose the complete list of failures for FMTV trucks over the years, probably by year. Bet that information is collected and used to make decisions like replacing fan clutch system.

Does anyone know the military documentation system well enough to know if failure information is stored?
 
Another Ahab

Another Ahab

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mkcoen said:
It would have been worth the price for me to do it if I could have avoided this. I don't think you can ever be sure unless there's a failure but the military must have had some reason to go back and change things. It should be a more solid foundation since you're actually bolting the fan to the clutch not pinching it between the clutch and another piece of aluminum.
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I don't know if your military is different from mine (and it's been a while), but if things haven't changed a whole lot don't count on there being a clearly logical explanation. :whistle: :mrgreen:
 
Suprman

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Yes. All the mil mechs I have spoken with have not seen a fan clutch failure they are surprised when I tell them it seem to happen pretty often. They have all seen the driveline failures though.
 
Another Ahab

Another Ahab

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Suprman said:
There is a recent tacom warning about using threadlocker when putting the fan bolts in.
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mkcoen said:
I'm guessing the warning is TO use it.
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I was wondering about that. But didn't want to look stupider than I already am. :mrgreen:

But maybe ii'm missing something. I get that. There's always room to learn, right?

As mkcoen points out, though;

-What could be the possible reason NOT to use threadlocker?
 
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mkcoen

mkcoen

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Well it is all back together. I was the Lone Ranger until the very end including mounting the tire (which I dropped) by myself. Handy having an engine hoist (won't in the field). Keith did show up as I was filling up the coolant tank and he got the axle shafts back in so the only thing tomorrow is check rear gear oil, cleanup and take for a test drive.

I forgot to mention during the teardown and retrofit that I found the clutch air hose had gotten caught in one of the alt belts and twisted it. There was enough damage that the belt was unusable. I tried another new one but it was slightly smaller than the second belt so had to replace both of them. Less than 3 months old and had to trash them (well I kept the one as an emergency spare). Need to add that to the list of costs for this adventure.
 

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Another Ahab

Another Ahab

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mkcoen said:
Well it is all back together. I tried another new one but it was slightly smaller than the second belt so had to replace both of them. Less than 3 months old and had to trash them (well I kept the one as an emergency spare). Need to add that to the list of costs for this adventure.
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It's all already spent, so why look back? All that might do is lead to pain, and that won't help. Maybe just keep moving forward with your head up. Is that a good plan?
 
mkcoen

mkcoen

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Another Ahab said:
It's all already spent, so why look back? All that might do is lead to pain, and that won't help. Maybe just keep moving forward with your head up. Is that a good plan?
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Not a painful situation (although I dropped one of the front guard panels on my shoulder yesterday - about 25lbs - and that was kind of painful). I'm the type that likes to keep a running tally in my head as to what something costs. At this point it's just north of $1250 and that's only because Keith_J was able to save me beween $500 and $1500 by repairing the radiator in my driveway. Of the $1250 it appears I'll be getting back around $800 for the tow bill so now down to $450. Of the $450, $325 was new parts (fan clutch, fan, belt, misc nuts/bolts) so I'm down to what I consider $125 in wasted consumables. I can live with that.
 
mkcoen

mkcoen

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Got everything back together including having to add over 1 gallon of gear lube to the rear diff. Took it out for a shakedown run and everything fan related worked great. The fan kicked on where it was supposed to and kicked off where it was supposed to. I did run into a problem while out though as the System Brake valve started leaking while depressed. This happened after I stopped for fuel on the way home. No leak when parking brake was on but as soon as I released the brake it started leaking. It was so bad that the last 3 miles home I had to stop twice to let the air tanks refill. About a block from the house it stopped leaking. I'll tear into it this afternoon but don't think I'm going to make the air show after all.
 
mkcoen

mkcoen

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Apparently the issue with the valve self corrected. I'm going to try making the air show tomorrow knowing that if it starts leaking again I'll just have to turn around. I may have to stop every 2 miles to let the air tanks fill up but that should only add 3 or 4 hours to the trip ;)
 
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M813rc

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I know there will be a 5-ton and a towbar close by tomorrow, should anything need to be dragged. ;)

Amazing how much you got done while I was away for the week (fishing out on the Gulf with no phone or internet access). I was expecting to see Mrs Mkcoen's M37 tomorrow, I was quite surprised when you told me the LMTV is going to make it! Well done!

See you in the morning. :clinto:

Cheers
 
TNriverjet

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mkcoen said:
Well we survived the rain and the show did go on but more importantly I made it home without the assistance of a wrecker!
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Great news Mark! Glad to hear the trip went smoothly. I had a bit of a MV journey today myself as my family and I joined the MV owners club (see signature for a clue). Don't want to hijack your thread, so you can link over to my recovery thread here.
http://www.steelsoldiers.com/showthread.php?158412-M1078-Recovery
 
mkcoen

mkcoen

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Swung by the post office this morning and found the check for my tow bill. 100% covered. These guys are keeping my business.

image.jpg
 
M813rc

M813rc

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A wet start to the day, glad that "cold" front came through way earlier than predicted, so we had nice weather for the air show.

It was nice to drive over to Burnet in good weather, sit out the storm in the back of reloader64's M35, then have the show and drive home in clear weather again.

Cheers
 

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mkcoen

mkcoen

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I picked up a new tool set the other day. Since there's no mounting of a standard pioneer rack this will have to be stowed some place. The rifle rack was suggested but I don't like the idea of having an axe and a bunch of heavy metal bits rattling around behind my head so I'll probably just find a spot in the bed for it. It's too long to fit into my metal tool boxes but I have plenty of OD straps that I can use to secure it in place somewhere.

It's a nice kit and the only thing really wrong with it is there's some kind of adhesive sticking to everything in the bag. I've tried GooGone on it with no luck. Acetone will probably be my next test.

IMG_4678.jpgIMG_4679.jpgIMG_4680.jpgIMG_4681.jpgIMG_4683.jpgIMG_4684.jpg
 
Another Ahab

Another Ahab

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mkcoen said:
I picked up a new tool set the other day. Since there's no mounting of a standard pioneer rack this will have to be stowed some place. The rifle rack was suggested but I don't like the idea of having an axe and a bunch of heavy metal bits rattling around behind my head so I'll probably just find a spot in the bed for it. It's too long to fit into my metal tool boxes but I have plenty of OD straps that I can use to secure it in place somewhere.

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If you want to stow it as an ax, most fire department suppliers or even landscaping suppliers will have a variety of ax "holders" you might look at. And then just stow all the accessories in a box of some kind.

If I can find one of those ax holders, I'll post it here.
 
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