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Old 08-04-2011, 16:03   #1
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Injector Pump Bleeder Screw

I'm in the hunt for a bleeder screw from the injector pump on my Perkins 4.154. The pump may not be original equipment.

The bleeder is 1/4 inch in diameter, looks like 5 threads per 1/8 inch an there are 3/16 inch of thread. The hex head is 5/16.

As for why I'm searching, my engine sits beneath the sole of the pilothouse and I dropped a bleeder. I scurried beneath the engine and ended up somewhere unreachable. I have spent hours fishing with a magnet and pole to no avail. I dropped a "sacrificial" screw and it bounced where I expected the other to be. I retrieved it no problem with the magnet. The bleeder remains elusive.

Any suggestions welcome.
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Old 08-04-2011, 16:15   #2
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Re: Injector Pump Bleeder Screw

5 threads per 1/8 would be 1/4 x 40 tpi. It could also be metric depending on where the pump was made. Oddball screws can be hard to come by from the usual suppliers like Brafasco etc. but you could try an industrial supplier in the area if you have any. An automotive machine shop may have something. Good hunting. Do you have or have access to a thread pitch guage to verify the thread count?
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Old 08-04-2011, 16:19   #3
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Re: Injector Pump Bleeder Screw

Thanks perchance. It's nice to know the correct terminology.
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Old 08-04-2011, 18:54   #4
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Re: Injector Pump Bleeder Screw

Transatlantic Diesel
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Old 08-04-2011, 19:10   #5
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Re: Injector Pump Bleeder Screw

Page 16 of the manual is the injector pump. I looked and couldn't find the bleed screw. Every other part in the world is there. Maybe you can find it.

http://l-36.com/manuals/Perkins-4.154-Parts-Manual.pdf
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Old 08-04-2011, 19:24   #6
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Re: Injector Pump Bleeder Screw

I think your right, it's not in there.

There's a local retired fisherman who's used a few perkins over the years so I'll visit him tomorrow. The catalogues at the Nanaimo Perkins dealer show it being a gas engine??? but with a few more numbers they might be able to help.

It's under there somewhere so while I'm there again tomorrow I might as well try the magnet again. My frustration meter pegs after a few hours of aimless fishing but a good nights sleep and it resets

Transatlantic Diesel, holy crap, perkins-R-us! They look promising. Before I order from England I'll check them (that was the Nanaimo dealers comment on where the part might be found).
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Old 08-04-2011, 19:38   #7
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Re: Injector Pump Bleeder Screw

Ask for Sherri
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Old 08-04-2011, 20:40   #8
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Re: Injector Pump Bleeder Screw

Sherri will have it at T.A.D. I used my shopvac with a broom handle taped to the hose and got lucky.
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Old 08-04-2011, 20:42   #9
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Re: Injector Pump Bleeder Screw

I was thinking about using a vac. I've got a shark on board but it's hose isn't very long. I think it would be worth a try.
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Old 18-04-2011, 14:11   #10
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Re: Injector Pump Bleeder Screw

Active Fuel Injection in Nanaimo had a screw. Great guy if you have fuel injection needs in the area.
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Old 18-04-2011, 14:48   #11
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Re: Injector Pump Bleeder Screw

"5 threads per 1/8 would be 1/4 x 40 tpi. It could also be metric depending on where the pump was made. Oddball screws can be hard to come by from the usual suppliers like Brafasco etc. but you could try an industrial supplier in the area if you have any. An automotive machine shop may have something. Good hunting. Do you have or have access to a thread pitch guage to verify the thread count?"



I managed to strip out the fittting for the same screw once years ago. After a great deal of searching for the correct tap, I was told by an old codger that the thread was British "Wentworth" thread. I believe I'm spelling that correctly but not sure. You probably won't find what you need anywhere but a Perkins dealer. Or your bilge. Just thought I'd throw this in there in case anyone else runs into the same problem. Pitch is different on British thread and nothing sae or metric matches it. Good luck!
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Old 18-04-2011, 14:51   #12
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Re: Injector Pump Bleeder Screw

The Perkins folks told me to see Active since they didn't have a listing for it. The fellow at Active just knew what it would be, no numbers and didn't need to see the original. It must be fairly standard.
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