Help with bolts on Rayco RG50

racnruss · Mar 27, 2010

The (2) 1/2" bolts that hold the main hydraulic pump to the back of the 3 cyl Duetz diesel engine keep working loose. We have tried star lock washers, regular lock washers, and locktite, nothing keeps them in. Any ideas?

I thought I saw an ad once for bolts that had a smaller bolt inside it that would swell the threads once inserted. I can't remember the name of the bolt or company.

Help, thanks.

Plyscamp · Mar 28, 2010

Drill both bolt heads side to side with a small drill. Replace the bolts, tighten them good and tight then run a wire through both bolt heads, bring both ends of the wire together and twist the ends until the wire is good an tight between the two bolts. That should keep them from working loose.

howel07264 · Mar 28, 2010

racnruss said:
The (2) 1/2" bolts that hold the main hydraulic pump to the back of the 3 cyl Duetz diesel engine keep working loose. We have tried star lock washers, regular lock washers, and locktite, nothing keeps them in. Any ideas?

I thought I saw an ad once for bolts that had a smaller bolt inside it that would swell the threads once inserted. I can't remember the name of the bolt or company.

Help, thanks.

I have the same engine but never that problem. Sounds like a vibration problem to me.

racnruss · Apr 10, 2010

fixed problem

Now it is fixed. Red lock tight, ramped special lock washers, and drilled and safety wired.

If you have this machine, check those bolts now. If your pump vibrates loose it is a bearcat to get it back on the motor. And you will probably be in a backyard somewhere. Plus when the pump slides off the motor under full load, it destroys the splines and coupler costing oh about 1500 bucks.

lone wolf · Apr 10, 2010

racnruss said:
Now it is fixed. Red lock tight, ramped special lock washers, and drilled and safety wired.

If you have this machine, check those bolts now. If your pump vibrates loose it is a bearcat to get it back on the motor. And you will probably be in a backyard somewhere. Plus when the pump slides off the motor under full load, it destroys the splines and coupler costing oh about 1500 bucks.

hard to believe the locktite and lock washers did not stop the problem must be a hell of a vibration.

BrynBrdf · Dec 21, 2011

Yep, I had that problem. Took To Rayco Factory to fix. Costed me $1500. They put a bracket on it to hold the bolts tight. I check it now every couple months. Probably should check more often.