Bosch Injector Pump Question on 400 Tractor

thanks, Larry

thanks for the help.

I have been trying to reuse the old washer, and your comments fit perfectly with the problem I"m having, namely, the copper isn"t deforming nicely to form a seal, instead, it"s spalling against the seat when I tighten down the fitting. I"ve tried recutting the copper on a lathe, twice, which has also been difficult. First time held for about 8 hours, the second time (today) didn"t work. I"ll try to find a new washer tomorrow. I don"t think I can get the old one off the fitting without damaging it, so annealing will be a last resort.

I was always fascinated by metallurgy as a kid. Still as much an art as a science, it seems.

Larry

You didn"t say if you were trying to reuse the old gasket. That may be your problem. Don"t try to reuse these gaskets. When they are compressed the copper work hardens and makes it more difficult to compress the next time. If you can no longer get these gaskets from Case, try taking your propane torch and heating the gasket to cherry red, then quench it in water. This will anneal the copper and make it soft again.

Good luck.