O-ring options MD2030D

[tribune]

Greetings all,
My Volvos are leaking from the injection pump fuel delivery valves I believe. Boat is on the hard up the Rio Dulce now so when I return in November I want to try and change out the o-ring and seal at the valve. If I pooch it then I'll pull the pump and try to find a shop that can fix it but I'll try the less expensive option first. Looking at the parts manual I need 3580124 (21238106) o-rings and 3580276 gaskets. Would anyone have the dimensions or a reasonable cross to these o-rings? $15 a ring is a bit ridiculous.
Cheers

[nightowle]

Have you looked to see what the equivalent would be for the similar model Perkins?

[tribune]

Thanks nightowle. I crossed the Volvo with Perkins, Kubota and Mitsubishi but while less expensive there were inconsistencies in the cross between them. I think I'm going to use the injection pump number from Bosch and check my local shops to see if they can source the parts avoiding the "V" word.

[SailingHarmonie]

One of the valuable things on my boat is a pair of o-ring kits. One SAE, and one metric. Like this: https://amzn.to/3rNgv9i

They came with a meter of o-ring stock in all the various gauges. You carefully cut them to length, and glue the ends together with CA glue. It has saved my bacon a bunch of times and can be way more efficient than the great run around trying to find the right size in a remote location.

Just last week, I had a leak from the top of my coolant tank/exhaust manifold on my generator. I don't know how long it would have taken to track down the "official" part, but 20 minutes later, I had one in hand made from the metric o-ring kit, and the problem was fixed. If you don't know what material o-ring to get, Buna-N (nitrile) is good for coolant, fuel and oil. Viton, while pricey, is pretty much universally good for anything you might find on a boat. Just keep it away from acetone and other ketones.

[tribune]

Agree, good kit to have onboard. I have an o-ring kit onboard but the make up one would be better. It would still leave me having to source the copper gasket for the fuel delivery valves but they seem more reasonable priced.

[DougR]

The best thing to do is head down to your local diesel fuel injection shop and get the parts there. They will be the correct size and the price will be right.

The 3580276 “gasket” that you describe is actually a copper washer that usually can be re-used. However it’s probably best to take a few with you just in case.

[tribune]

I did just that. Once I stopped trying to find parts for the pump based on the engines it became easy. I gave my local shop the Bosch injection pump number and they had them in stock and very reasonably priced. Case closed.