BMC 9/16 tractor injector pump removal

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cfc_agri
Posts: 1
Joined: Fri Aug 11, 2023 6:42 pm
South Africa

BMC 9/16 tractor injector pump removal

Post by cfc_agri »

Greetings from South Africa
New to the Nuffield / BMC tractor scene
I have a 9/16 here that has been standing for a while, can't get it to start
Not getting fuel at the injectors
Opened up the top cover on the injection pump and found the fuel shut of lever was stuck. Freed that up but still not pumping any diesel to the injectors
Anything else I could try before removing the pump?
How hard is it to set the timing before removing the pump, have never done it
Can the pump be opened up and cleaned, looks to be al little bit of rust and crust inside from sitting that long
Any help or advice appreciated


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Billy26F5
Posts: 54
Joined: Thu Jul 06, 2023 7:35 pm
Great Britain

Re: BMC 9/16 tractor injector pump removal

Post by Billy26F5 »

What type of pump do you have? Different pumps can have different problems, but it could be stuck plungers (I can't be too sure till I know what pump you have).
Sandy
Ley154
Senior Member
Posts: 256
Joined: Sun Apr 01, 2018 8:22 am
Location: Gloucestershire UK
Great Britain

Re: BMC 9/16 tractor injector pump removal

Post by Ley154 »

If the re is muck in the pump it's odds on that the two pumping plungers are gummed up. A strip down and clean of the pump is best. It's possible to free the plungers without loosing the roller to roller dimension setting. If you don't know what I'm talking about I would suggest you get a pump specialist to clean it. Get yourself a workshop manual for the Mini - downloads are about on the internet. The pump is the common CAV DPA mechanical governor type. The timing setting is done by matching a scribed line on the outer ear of the mounting flange with a pointer that is bolted to the back of the timing case. If you are lucky it's still there - don't move it. Not a bad idea to put a centre punch dot on the timing case where the tip of the pointer is. As you can see in the photo the pointer is adjustable and is set with the crankshaft at 16 deg BTDC no 1 cyl and the tip is moved to match the scribed line on the timing tool. If the pointer is long gone put o dot on the timing case to show where the scribed line is on the pump ear and refit the pump back in that position. Over the years timing chains stretch and you may find the engine runs at its best with the injection pump advanced from any original settings.
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