322 diesel re-power

Alldiesel_1 · Apr 8, 2016

Hello, I picked up aa 3tn66 diesel yanmar similar to the one in a 332. I'm going to be installing this engine in my 322 and thought I'd start a thread for questions I might have.
Right now I'm just looking it over to see what 332 parts I need to buy to make everything bolt up. I think I'll use the original 322 engine mounts and the stub shaft for the front PTO clutch.

First Q- is the 322 and 332 front PTO stub shaft the same?

Alberta 7.3 · Apr 8, 2016

Spend some time on JD parts. John Deere - Parts Catalog You'll be able to look up diagrams for both tractors, and compare part numbers to see if things are the same or not.

Alldiesel_1 · Apr 8, 2016

Alberta 7.3 said:
Spend some time on JD parts. John Deere - Parts Catalog You'll be able to look up diagrams for both tractors, and compare part numbers to see if things are the same or not.

Thanks for the link:thThumbsU

Alldiesel_1 · Apr 8, 2016

Just for mounting the engine and testing it I think I'll install the 322's adapter plate, flywheel, starter and cover on the diesel engine. After I make sure it runs good I can purchase and install the correct 332 parts. The big difference is that the flywheel appears to be slightly larger/heavier on the 332's. I don't think the lighter 322 flywheel will hurt anything for testing purposes

rayjay · Apr 8, 2016

Make sure the motors are internally balanced. If the flywheels have a large counterweight cast into them then you may have issues swapping flywheels as they may have different balance factors.

Alldiesel_1 · Apr 8, 2016

rayjay said:
Make sure the motors are internally balanced. If the flywheels have a large counterweight cast into them then you may have issues swapping flywheels as they may have different balance factors.

Ok that's something I was wondering about since the flywheels are doweled and you can only install them one way. I'll look at the flywheels tonight, thanks for the tip :fing32:

rayjay · Apr 8, 2016

Being dowelled doesn't necessarily mean they are counterweighted although it could be the case. If there's only one dowel then I would be more worried than if there were more. 3 cyl motors shake a lot and the dowel ~~may just be there to help keep the flywheel from shearing off the fastener.~~

Seane1987 · Apr 8, 2016

Wiring is quite a bit different, there is a module to control the glow plugs, that also engages the fuel shutoff solenoid.

Alldiesel_1 · Apr 8, 2016

Seane1987 said:
Wiring is quite a bit different, there is a module to control the glow plugs, that also engages the fuel shutoff solenoid.

Im planning to try to put together some relays for the glow plugs ect and make them manual and this engine only has a manual shut-off so I'll buy a pull cable or use the original choke cable to kill the engine. The glow plugs will probably be the trickiest part as far as that goes. I decided ill probably sell the old 322 wiring harness with the engine if/when i do sell it.

Will my 322 fuel pump work ok with diesel fuel?

Alldiesel_1 · Apr 8, 2016

rayjay said:
Being dowelled doesn't necessarily mean they are counterweighted although it could be the case. If there's only one dowel then I would be more worried than if there were more. 3 cyl motors shake a lot and the dowel ~~may just be there to help keep the flywheel from shearing off the fastener.~~

~~Would it be fairly obvious is the engine was externally ballenced with the flywheel? The flywheels look pretty uniform as far as i can tell.~~

rayjay · Apr 8, 2016

Alldiesel_1 said:
Would it be fairly obvious is the engine was externally ballenced with the flywheel? The flywheels look pretty uniform as far as i can tell.

You would probably see a definite pie shaped counterweight cast in. I have no experience with your motors just lots of experience with V8s some of which are externally balanced like the two 5.9 Mopars I own.

Alldiesel_1 · Apr 8, 2016

rayjay said:
You would probably see a definite pie shaped counterweight cast in. I have no experience with your motors just lots of experience with V8s some of which are externally balanced like the two 5.9 Mopars I own.

Ok thanks for the info, yea these are uniform round with no cast weighted areas or machining other than a couple drilled spots which I assume would be just for ballencing the flywheels themselves

Seane1987 · Apr 9, 2016

If you are going to manually wire the glow plugs, you can just use a relay or solenoid (I would probably just by a starter solenoid). You can control the solenoid with a momentary switch, or you can by a special key switch that has a 4th postion (A second momentary position in between the "Run" and "start" postions, that you can use to engage the glow plugs.

Alldiesel_1 · Apr 9, 2016

Seane1987 said:
If you are going to manually wire the glow plugs, you can just use a relay or solenoid (I would probably just by a starter solenoid). You can control the solenoid with a momentary switch, or you can by a special key switch that has a 4th postion (A second momentary position in between the "Run" and "start" postions, that you can use to engage the glow plugs.

Ok, I'll probably go with a momentary switch for the glow plugs. I'd think a starter solenoid would work good, and they're cheap and common :fing32:

Alldiesel_1 · Apr 9, 2016

I went ahead and bolted up the gas yanmar engine plate, flywheel and starter on the diesel engine. Everything lined right up. :fing32:

Alldiesel_1 · Apr 9, 2016

Found another obstacle.. The water pump pully is close to 2" lower on the diesel than the gas motor. I'll either have to swap water pumps or remove the fan and find an electric fan to mount on the rad. I completly overlooked that detail.

rayjay · Apr 9, 2016

Just swap the pumps. All it costs you is gaskets.

Alberta 7.3 · Apr 9, 2016

Seane1987 said:
If you are going to manually wire the glow plugs, you can just use a relay or solenoid (I would probably just by a starter solenoid). You can control the solenoid with a momentary switch, or you can by a special key switch that has a 4th postion (A second momentary position in between the "Run" and "start" postions, that you can use to engage the glow plugs.

I like the momentary switch idea. My JD golf course mower (1995 2653A) that I used for a repower had a manual GP switch/solenoid. I simply cut a hole in the dash for it where the choke cable used to be.

Alldiesel_1 · Apr 10, 2016

rayjay said:
Just swap the pumps. All it costs you is gaskets.

I got the water pumps switched out. I just used gray sealant that was rated for water pumps for now. Also from switching the water pumps I also had to get a different size belt.

It's not connected to the transmission yet but I installed it in the 322 and just hotwired the gas yanmar fuel pump and used a regular fuel filter just to test start it. Seems to run prety good, very clean :thThumbsU. Only took a few minutes to get it primed to the IP and it fired right up. :greendr:

Seane1987 · Apr 10, 2016

Sounds like your on the right track!!!

322 diesel re-power

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Alberta 7.3

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rayjay

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rayjay

Seane1987

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Alldiesel_1

rayjay

Alldiesel_1

Seane1987

Alldiesel_1

Alldiesel_1

Alldiesel_1

rayjay

Alberta 7.3

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