Kubota d722 injection pump not pumping

[lugbolt]

i can't count how many d722's, d902's, d662's, V1505's, D905's and a couple V2403-T's that I've had to rebuild because of a little spritz of starting fluid.....

 

[PoTreeBoy]

We didn't give it much ether. Just enough to hear it run on cylinder number 3. Once we heard it run on all 3, we stopped and decided to do a valve job. Nothing happened to the rings or anything else. The ether was only coming out in drops, literally. The valves were leaking when we first tried starting it, without ether. We hate using it but we did not want to buy anything else for it until we heard it run on all 3.

I wish you luck, but I'm curious how you decided the valves were leaking. Cracked head seems more likely from what I read.

 

[Nutmeg]

I wish you luck, but I'm curious how you decided the valves were leaking. Cracked head seems more likely from what I read.

We did a leak down test on it and air was coming out of the exhaust and intake valves.

 

[Nutmeg]

I wish you luck, but I'm curious how you decided the valves were leaking. Cracked head seems more likely from what I read.

Thanks though! Will keep you posted on how it runs when I get the stuff for it! Then I'm starting a diesel swap!

 

[Nutmeg]

I pulled the oil pan off and found out the rod cap was loose and the bearing got mangled. Needs rebuilt. The rings are shot. Any ideas on where I can get a good rebuild kit for it? The crank also has grooves in it from the bearing getting mangled.

 

[North Idaho Wolfman]

I pulled the oil pan off and found out the rod cap was loose and the bearing got mangled. Needs rebuilt. The rings are shot. Any ideas on where I can get a good rebuild kit for it? The crank also has grooves in it from the bearing getting mangled.

So new crank and I'll look who has a full rebuild kit.

 

[North Idaho Wolfman]

Here ya go:

D722 Overhaul Rebuild Kit Con Rod Crankshaft Water Oil Pump For KUBOTA Engine | eBay

Engine Model : D722. This kit is for KUBOTA D722 Engine. parts for KUBOTA D722 Engine. Application:For KUBOTA engine. Type:engine rebuild kit. 1 set of con rod bearing set. 1 pcs crankshaft (used Parts, in good conditon).

www.ebay.com

You'll need to have a machine shop or engine shop remove the liners, install the new liners and bore it to size.
The rest of the rebuild you can do yourself.

 

[Nutmeg]

Here ya go:

D722 Overhaul Rebuild Kit Con Rod Crankshaft Water Oil Pump For KUBOTA Engine | eBay

Engine Model : D722. This kit is for KUBOTA D722 Engine. parts for KUBOTA D722 Engine. Application:For KUBOTA engine. Type:engine rebuild kit. 1 set of con rod bearing set. 1 pcs crankshaft (used Parts, in good conditon).

www.ebay.com

You'll need to have a machine shop or engine shop remove the liners, install the new liners and bore it to size.
The rest of the rebuild you can do yourself.

OK thanks!

 

[Nutmeg]

Another question, what size is the std bore supposed to be and what it the std crank size? We just want to check the bore and crank and see how worn it is. If it's even worn

 

[North Idaho Wolfman]

Another question, what size is the std bore supposed to be and what it the std crank size? We just want to check the bore and crank and see how worn it is. If it's even worn

You need the WSM for the engine it will give you all the specs.
On the flat next to the Injection pump or maybe on the valve cover will be the engine serial number, give me that and I'll see if I have the manual. I have a couple.

 

[Nutmeg]

You need the WSM for the engine it will give you all the specs.
On the flat next to the Injection pump or maybe on the valve cover will be the engine serial number, give me that and I'll see if I have the manual. I have a couple.

 

[North Idaho Wolfman]

2 questions
Was that an ex military engine?
And does it have a turbo?

Or do you know what it came out of?

Might need some more pictures of the engine like the exhaust manifold.

 

[North Idaho Wolfman]

And FYI: Before you put a bunch of $$$ into rebuilding it, you can pick up a good used D722 for less than you can rebuild yours!

Kubota Diesel Engine D722 20 HP | eBay

Find many great new & used options and get the best deals for Kubota Diesel Engine D722 20 HP at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Kubota D722 Diesel Engine 1059 hours (Run Video) removed from TG1860 | eBay

Find many great new & used options and get the best deals for Kubota D722 Diesel Engine 1059 hours (Run Video) removed from TG1860 at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Kubota D-722 (18hp) Diesel Engine (984 hours) Runs (fits Kubota G1900) | eBay

Find many great new & used options and get the best deals for Kubota D-722 (18hp) Diesel Engine (984 hours) Runs (fits Kubota G1900) at the best online prices at eBay! Free shipping for many products!

www.ebay.com

 

[Nutmeg]

2 questions
Was that an ex military engine?
And does it have a turbo?

Or do you know what it came out of?

Might need some more pictures of the engine like the exhaust manifold.

 

[Nutmeg]

And FYI: Before you put a bunch of $$$ into rebuilding it, you can pick up a good used D722 for less than you can rebuild yours!

Kubota Diesel Engine D722 20 HP | eBay

Find many great new & used options and get the best deals for Kubota Diesel Engine D722 20 HP at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Kubota D722 Diesel Engine 1059 hours (Run Video) removed from TG1860 | eBay

Find many great new & used options and get the best deals for Kubota D722 Diesel Engine 1059 hours (Run Video) removed from TG1860 at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Kubota D-722 (18hp) Diesel Engine (984 hours) Runs (fits Kubota G1900) | eBay

Find many great new & used options and get the best deals for Kubota D-722 (18hp) Diesel Engine (984 hours) Runs (fits Kubota G1900) at the best online prices at eBay! Free shipping for many products!

www.ebay.com

No it's not. Was told that it came out of like a bobcat walk behind skidsteer

 

[North Idaho Wolfman]

No it's not. Was told that it came out of like a bobcat walk behind skidsteer

AWW yes I meant to put Bobcat in there as a possibility too.

Please hold.... Looking up manual options now.

 

[Nutmeg]

AWW yes I meant to put bobcat in there as a possibility.

Please hold.... Looking up manual options now.

OK thank you

 

[North Idaho Wolfman]

Check your PM's

 

[Nutmeg]

I'm trying to get the crank out of the d722 but I cannot seem to get the timing marks lined up. How are the marks supposed to line up? We just want to get the marks lined up before we pull the crank

 

[PoTreeBoy]

I'm trying to get the crank out of the d722 but I cannot seem to get the timing marks lined up. How are the marks supposed to line up? We just want to get the marks lined up before we pull the crank

Since the idler gear doesn't have an even multiple of the crank gear teeth, you may have to rotate the crank 100 or 200 turns to line all the marks up together. Probably easier to remove the idler and start from scratch.