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Rod bolt lockwasher

J

Jim Isler

Member
Putting my H back together. Existing rod bolts have a flat washer and a lockwasher with ears to fold against tightend bolt. ears worn off from bending. Can I use regular lockwashers?
 
If you are talking about plain old split lock washers,then no, I wouldn t use those. Threadlocker would work, or get the right bendable tabs,someone must be reproducing them I would guess.
 
I agree With Mike, Not a solution. Split locks often crack and fall out (serious issue on a rod) I never use them unless my work involves the life of a user, then only if they transfer liability to the original engineer. (I distrust them is every way)
Use locktite and have it clean and dry before application. Jim
 
Yea,

You DO NOT want a regular old hardened lock washer "digging" in to the body of the rod cap. It WILL NOT torq correctly with that design of washer.

You CAN get new ones with bendable tabs.
 
Ask yourself these questions, what kind of day am I gonna be having when that rod that I applied a "presidential solution" to comes apart? how mad am I going to be with my self when I trash a rod piston and crank and other things yet to be determined ( cam or if you're having a really bad day BLOCK) because I didn't want to get the right stinking parts? Where am I going to be when it lets loose and how long of a cold wet walk will this entail? And How p.o.'d will the spousal unit be and how long until she lets me forget about ruining $800 dollars of engine parts 'cause I wanted to save $50? Choice is your man choose wisely
 
(quoted from post at 17:28:39 01/31/12) Call a CNH dealer & ask for part 47499DB, thats just the bend lock part only.
Click to expand...

The part is $6.07 on Messick's site. You use 8. That would be less than $50 for the genuine CNH part. I would check with your machine shop to see if they can get them cheaper. Really I would think a decent rebuild kit would have them in it.
 
If the rod bolts have holes you can use safety wire that's twisted neatly over to the other rod bolt. We did it by hand on Tank engines. The Air Force used a tool for twisting the wire. Hal
 
i've always wondered why they put wire or metal tabs on the rod and main bolts,..i know it's so they won't come loose but newer engines don't have them, what's the difference ????
 
newer engines don't have them, what's the difference ????
Click to expand...
3 factors come to mind:
1) higher precision parts
2) more accurate torque control with modern tools
3) use-once fasteners maintain accuracy of the first 2 factors.
 
Maybe someone with more experience with them will comment. From my limited experience, I would say they are just fine if the application was originally engineered for them. I'd be hesitant to substitute them otherwise because I'm not sure if other design adjustments were made to use them.

In any case, I'd consider them single use parts. I know they turn a lot easier the second or third time they are used.
 
(quoted from post at 18:09:02 01/31/12) Putting my H back together. Existing rod bolts have a flat washer and a lockwasher with ears to fold against tightend bolt. ears worn off from bending. Can I use regular lockwashers?
Click to expand...

I put mine together three years ago without them at all, and it has held up just fine. It is used a as pulling tractor, so it is definitely getting some serious loading put on it. I am pulling it apart right now, when I get the pan off, I'll check the torque before I pull the rods and let everyone know how it held up.
 
(quoted from post at 09:01:15 02/02/12) i've always wondered why they put wire or metal tabs on the rod and main bolts,..i know it's so they won't come loose but newer engines don't have them, what's the difference ????
Click to expand...

When those machines were built torque wrenches were almost unheard of. Safety wire, Pal nuts, and locking tabs were ways of keeping fasteners with too little tension to stay tight from working their way apart. Once fastener strengths became standardized and torque specs were established that ensures enough tension so things would not work their way apart safety wires and locking tabs were mostly used on only critical fastener applications.
 
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