Hi folks, I have had my '94 L783 with 4k hours for several years now. When I purchased it, the left side servo had come loose, and was still working but laying on its side. I got all of the bolts replaced and put back on at the time, but it leaked a little hydraulic fluid through the servo seals. The other day, I filled the diesel tank up to the rim, and the next day, I came out to a big puddle. At the time, I looked inside and it was wet just under the left servo area, so I assumed that the seals finally gave out. I ordered new seals from Messicks and put them in today, but looking more closely, I discovered that there is a hole in the plastic fuel tank that must have been caused when the servo was off (back when I bought it). The hole is high up, so only will leak when fully filled. And, my nose doesn't work real good, I couldn't smell the diesel versus hydraulic fluid. I'm interested to patch this hole, and I just read elsewhere online about someone putting a screw into the hole and using that to build up JB Weld around it. I've seen in stores JB Weld marine and the JBWeld putty called Waterweld-both say good for fuel environments. The hole is on a vertical surface. Anyone have experience with something like this? thanks, Stephen
I had a Case 770 with a plastic tank that I had to fix a similar problem on. I used hollow wall anchors with a rubber washer under the head. As the screw is turned, the backside expands and will cover a large area to pull against. Get one which expands close the head to insure it pulls tight and use fuel resistant sealant on the shank and screw.
NAPA used to carry a two part epoxy ribbon for patching gas tanks that worked really well. You could use it even while the tank was leaking.