Caterpillar D2 (3J Series) Radiator PIPE Needs Repair

Monday March 14, 2016
Hello ACMOC Members:
I'm trying to repair a radiator component on a Caterpillar D2 (3J series) tractor. The component is a P/N 5B9375 PIPE, an alternate source has suggested that this part has been superseded by P/N 8B9316. The assembly consists of a drain valve (possibly made of copper) and a elbow shaped steel tube that has been soldered into place. My tube is corroded and damaged perhaps beyond repair. I'd like to replace the tube and was wondering if any members have made this kind of repair to salvage the part. The valve portion of this assembly has this part number: 4B7742. I'll try to attach some pictures to describe the part and thanks for your help. David.[attachment=34321]DSCF1333.jpg[/attachment][attachment=34322]DSCF1334.jpg[/attachment]

Do you have a hydraulics component supplier [Parker, etc] in the area? They can bend a piece of hyd tubing and braze it in for you. Gary

Looks like the tubing may be a standard long sweep ell. I wonder if a good plumbing supply might have a copper one that could be silver brazed into that fitting. On the other hand some regular old flux coated brazing rods will work wonders if there's a skeleton of steel left to work with.

Interesting. I have two D2 3J's out back and the same part on both appears to be one piece, while yours looks to be assembled or fabricated from different materials.

Florin Tractor PH#(916)383-0317 in Sacramento CA, shows that they have 7 8B9316 pipe assemblies. Ray's used Equipment PH#(940)825-3191 shows he has 1 5B9375 pipe assembly. All should work for your application.