Fixing Stuck Injection Pump - Yanmar 3 Cylinder Diesel - 3TN82E

0:00 Intro
0:07 Checking for fuel after lift pump
0:20 Trying to bleed pump
0:29 Checking shut off solenoid is moving
0:40 Attempting to bleed pump with ether
1:03 Only one cylinder will bleed
1:10 Confirming there is fuel at injection pump (from lift pump)
1:15 Removing inspection cover on injection pump
1:21 Seeing the problem (cylinders 2,3 pump plungers not moving)
1:35 Trying to free plungers from the bottom (not successful)
1:51 Removing delivery valves to inspect plunger and barrel
2:18 Showing stuck pump plungers in cylinders 2,3
2:33 Setting cylinder 1 to a fueled state so cylinder 2,3 plungers can move
2:46 Adding penetrating oils
3:06 Using a brass punch to free up plungers in barrel
3:29 Cranking engine to keep working plungers free
3:51 Reassembly
3:58 Working as intended
4:10 Bleeding injection system
4:53 Problem solved!!!

[@jonathanstrong7682]

Perfect. Exactly what I needed to know. Thank you for a cleanly presented and informative video!

[@kiwiwifi]

Now that’s what I call getting it done!

[@cherylstevens9370]

Brilliant fix you are gonna save me a grand or so thank you

[@daurieschwartz4189]

Nearly the same pump on a Takeuchi TB125 Mini ex. Your video helped me diagnose a no start / no-fuel issue. Had no fuel at the injectors and had a plunger stuck up. Tapped it down (luckily didn't have to remove the top valve) and it cranked right up.

[@StanwoodStudios]

Excellent. So glad this helped!

[@jameswhittaker5015]

Brilliant thanks for this helped me cure my John Deere 4115 in the Uk

[@zzbmiii]

Bro, going through this right now with Yanmar / John Deere OMG …..getting new.fuel filter to install ,iam sure air is caught in top of pump and trying so hard to get tractor running again /ran out of diesel ,hard lesson to learn….!!!!

[@ron1457]

Thanks so much for this! Same engine and problem i think for me on a 4whl drive tractor with loader. Having trouble getting the access plate off as is blocked by the loader arm. I wonder if it could be done without taking the plate off by rotating crank to maybe 1/4 turn past #1 TDC so you know its not injecting anywhere and just tapping from the top?? And its the small center piston that gets tapped with the brass drift right??

[@Hung-Phan]

Thanks for posting.

[@StanwoodStudios]

Absolutely. Thanks for watching!

[@CAPTAINSSBN]

Need to know how the injector pump works does it need to full ofuel to ensure that the plungers go all the way up originally #1 was fine 2 and 3 were stuck same as in your video they did move about 1/8 inch

[@leeedwards3855]

To bleed did you turn it over with injector tops open till fire then nip up?

[@CAPTAINSSBN]

Great video do you know of a yanmar mechanic in Melbourne fl I think my engine has same issue it's on my island packet yacht

[@jamesward5721]

They're good engines, but they're feckitty on the fuel supply front. I have 3 with similar issues sitting staring at me. If I have 3 like that, it means loads have similar issues - the fuel cut-off solonoid valves also suck - they're soft & give bother. It'd be great if Yanmar would nip over to Kubota and ask for a few "How do we make our stuff better?" Tips.

[@StanwoodStudios]

Yes definitely, don’t let ‘em sit!!!

[@pingpong9656]

@@StanwoodStudios How long did this one sit for?

[@hardwork6848]

Got a 3TN in a gator 6x4 It appears to be getting fuel to all injectors Has a pretty good knock, it’s like an oscillating and clacking knock. Any thoughts? (All push rods look ok and injectors seem to be working)

[@StanwoodStudios]

Are the connecting rods good? Is the timing on the injection pump correct?

[@pingpong9656]

What do you think caused them to get stuck in the first place? Sitting around without use?

[@StanwoodStudios]

Precisely. The machine was parked running and unused for three years or more. I have a couple videos reviving this machine on our channel!

[@jasonshrout8921]

This is a Master Class compared to JD training. Thanks for posting. Any chance you understand the mystery of timing one of these after a customer thought it'd be easy to install a new one?

[@StanwoodStudios]

Check out my other videos where I explain timing on a Perkins diesel (same principle applies). Ensuring injection pump is keyed to timing gear (it isn’t always on older engines), then checking exact timing. Hopefully there is a scribe mark from the pump casing to the engine block mating surface. Or maybe missing paint or some indicator of where it goes (the injector pump usually has slotted bolt holes. If not there is a procedure for timing that is best explained by others, as that is the extent of my knowledge!

[@cherylstevens9370]

I’ve dealt with techs from John Deere that are expected to know yanmar stuff they are complete idiots