John Deere 310 injection pump question

Cariboo4x4 · Apr 20, 2019

Trying to fix a leak on my landlords injection pump. Diesel is collecting and dripping from this plug that has a crosswise hole in it. Blue arrow below. There is a piece of wire through hole and twisted tightly. This photo I just found on internet and added a couple of arrows with my Paint program. There is also an Allan bolt approx in this area - red arrow. The parts manual identifies the red arrow as "screw assembly, head locating". And blue arrow as "screw, cam locating". There is "packing" for each of these parts so I expect I can order new packing's. If I remove injection pump from engine as outlined in service manual I expect I can replace the packings without throwing anything out of adjustment if I count the turns carefully. Or should I have landlord send pump in to be serviced? My service manual outlines no details how to adjust or service these parts. Any suggestions or comments would be appreciated. Thank you
Pump is a JDB331AL 2406.

Bob · Apr 20, 2019

Holes in "blue" plug are used as an anchor point for the factory seal wire for the timing advance, but there's no critical adjustment at the plug.

"Red" plug is not an adjustment, either.

If I get time later, I'll look up and post the recommended torque values.

If you can access the plugs with the pump mounted in place, there's no need to remove it to replace the O-rings on the plugs.

Dieseltech · Apr 20, 2019

First, I'd make sure the leak is not higher up somewhere on the pump, especially the high pressure line bolt washers. Use an air blowgun and a mirror if needed, as the areas you describe seldom leak. I once had a governor leak complaint on a JD 4430, turned out it was the lift pump sediment bowl leaking, and engine fan was blowing the leak back onto the governor. Any leak higher up will still drip off the bottom.

JDEM · Apr 21, 2019

Pump info from Deere is in the separate SM2045 tech manual. Lots of places to leak and most will look like they are coming out the bottom.
That said - the plug that covers the head-screw has one simple o-ring on it. The other is more complicated and has some internal o-rings.
Both can be changed with the pump in place IF you can get them out.

Note that you can buy a seal kit with all the seals for the entire pump for less then $20.

Tx Jim · Apr 21, 2019

John
It's nice to read your reply.
Jim

Cariboo4x4 · Apr 21, 2019

Thanks again guys for all the info! I'll continue to check for leaks higher up to.

John Deere 310 injection pump question

Cariboo4x4

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Bob

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Dieseltech

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JDEM

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Tx Jim

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Cariboo4x4

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