Have these people ever heard of loctite?

[dickfoster]

Just found a big nut laying in my driveway. In front of the garage where I do all my tractor service, greasing and such. It was one of the four big bolts holding the backhoe to the sub frame so I guess this was either the fault of Mahindra assembly in Olivehurst, CA or maybe KMW in Kansas. This one of four bolts that have a 600 ft/lb torque spec. Hey guys how about either welding the nuts so only one wrench on the bolt is needed or maybe put some blue loctite on these things. This is the second runway nut I've found in my driveway, a bigun and a littleun that I have yet to find where it came from. And I still have no feedback from the dealer on my inop from birth temp gauge. If they'd give me some decent service info I'd fix the thing myself if it's a bad connection or something.

 

[Leejohn]

Man how big is that nut to have a 600 ft/lb torque spec.

 

[bcp]

Man how big is that nut to have a 600 ft/lb torque spec.

According to this table, it would be about 1 inch grade 8, or similar sized metric.

Bolt Depot - US Recommended Bolt Torque Table

Bruce

 

[dickfoster]

Man how big is that nut to have a 600 ft/lb torque spec.

It's a grade 8 bigun. It's one of four bolts that attach the backhoe to the sub frame. I'd say 3/4" or so but haven't measured it. I know it has a higher spec than my 1/2" torque wrench will go so it's impact gun time and make it tight. I'll put some blue loctite on it while I'm at it. The factory should maybe give loctite some thought too so these things don't shake themselves apart. A little dab'll do ya.

 

[Jabonee]

That spec is correct. I usually find at least 1 of those 4 loose when I have a customer unit in for service. We have a TLB in our rental fleet that after the 4th or 5th time the bolts came loose or fell out I replaced then with crimp nuts and has not been an issue since. Also note for higher torques there are torque multipliers available at tool supply stores.:thumbsup:

 

[dickfoster]

That spec is correct. I usually find at least 1 of those 4 loose when I have a customer unit in for service. We have a TLB in our rental fleet that after the 4th or 5th time the bolts came loose or fell out I replaced then with crimp nuts and has not been an issue since. Also note for higher torques there are torque multipliers available at tool supply stores.:thumbsup:

I'm gonna loctite the thing and any other loose hardware I find. I've already gone over this thing once checking for loose hardware but I guess they like to shake themselves apart. It's only got all of 20 hours on it. Imagine if they made cars this way.
Come to think of it, I guess Detroit did make cars that way for awhile anyway and that's why I don't buy cars made in Detroit anymore. Trick me once, shame on you, trick me twice, shame on me.

 

[s219]

This seems to be a common topic with Mahindras, but why would their nuts and bolts behave any different than anyone else? Maybe everyone else is using Loctite?

 

[ultrarunner]

I started using Loctite with antique cars... not every bolt has a cotter pin Castle Nut although most do.

Wouldn't be without it in the shop.

 

[dickfoster]

This seems to be a common topic with Mahindras, but why would their nuts and bolts behave any different than anyone else? Maybe everyone else is using Loctite?

In all fairness the way to build this kinda stuff is to use weld nuts. At least that makes it easier to keep things tight. I'd use weld nuts for the parts and loctite during assembly. In this case that would be on Kansas Machine Works (KMW), the outfit that supplies the backhoes and loaders for the 1500 series to use weld nuts and Mahindra distribution to use loctite during assembly.
I don't know who makes the attachments for the 2500's as no one has spoken up.
It's not a costly process you just have to care about the quality of what you're turning out, put some thought into it and not be in such a hurry to get to the bank with the check.

 

[Snowback]

I don't know who makes the attachments for the 2500's as no one has spoken up.

I just checked. My 2538 has a TYM plated front loader. (Just like main chassis.) Inspection done by GMT Co. They are the big bulky squarish loaders as opposed to slightly more svelt units on the 15 series. Not quite as good a sight line, but strong like Bull! I do not have a backhoe on mine. The implements that Mahindra brands are made by Kodiak/Paladin and seem to be pretty good for the money. Paladin Attachments

I do need to get out the wrenches and go for a once over as I'm at 30 hrs. It would be nice if some tiny tack welds could be placed everywhere there is a low probability of needing to unbolt something... The problem with assembly line workers at any plant is that someone is bound to be having a bad day every now and then. Once Skynet is making all the machines independent of human interaction, then these rare QC issues will hopefully go away.