‘70 4020 CB injector pump o-rings

Ole_Jonny · Jun 17, 2020

1970 4020 with a CB pump on it. It leaking fuel from where the throttle linkage hooks to the pump. Anyone have a good part # for this?

Dieseltech · Jun 17, 2020

There are two O rings under the throttle lever assembly that hold grease in for the rack and pinion, the O ring that's leaking fuel is deeper inside on the rack itself. Most fellows just replace the two O rings and hope the leak stops awhile.

Ole_Jonny · Jun 17, 2020

Replacing the 2 o-rings at the rack and pinion was the plan. Dad’s been to the JD dealer and got new o-rings and they weren’t the correct ones. The ones they sent wouldn’t have even held in grease. I can’t find a good clear exploded diagram to see what lies below the rack and pinion. Thanks for the reply, I’ll keep looking and learning.

Dieseltech · Jun 18, 2020

E-mail your address and I'll mail the throttle O rings, [email protected]

Ole_Jonny · Jun 18, 2020

Email sent, thank you!

JDEM · Jun 18, 2020

Not a diagram, but images are good.

Ole_Jonny · Jun 19, 2020

Thanks JDEM

‘70 4020 CB injector pump o-rings

Ole_Jonny

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Dieseltech

Well-known Member

Ole_Jonny

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Dieseltech

Well-known Member

Ole_Jonny

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JDEM

Well-known Member

Ole_Jonny

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