DK45SC Starting problems

[Kioti Paul]

Ouch! jimglassford is right! There is a 'sticky thread' at the top of the forum describing this problem.

It happened to me several years ago, after stopping and eating lunch, I came out and started my tractor, and it went immediately to what seemed like full throttle, neither the governor or the throttle (or the ign switch) had any effect on the "run away".
Turns out to be the gear teeth on the injector pump 'pistons' (sleeves) breaking off, and jamming. It always seems to 'stick' at or near full throttle!
I had very little experience working on diesels, but there is an outstanding tutorial (somewhere in this forum) on how to do it.
I purchased all 4 'sleeves' from H&H Diesel Service, in Milton, WA - delivered to my door for $52. Really nice people! As I recall, all I needed from Kioti was a few gaskets. I got 'out' for less than $100 (& a couple weekend's work)

I was pretty intimidated by the job, so I REALLY understand taking it to a shop. Incidentally, at the time Kioti would only replace the injector pump with a new one $1,500 in parts (+ labor). You might check with a diesel repair shop in your area to see if they repair the injector pumps - probably could save a good bit of money.

Lastly, not to be a wet blanket (and it is quite a coincidence) but I'm guessing this is probably not your original problem. I still bet, after repairing the injector pump, your old nemesis will be back.

Good Luck!

 

[rd_macgregor]

I had the classic injector pump issue already with this tractor at 600 or 700 hrs, but it stuck at "won't run" rather than "full throttle". I now have over 1500 hrs. The first time this happened, my mechanic came and did the tear-down in my driveway (I have no barn, shop or garage) while I "helped" by passing him tools. It isn't something I want to undertake again, especially in the fall...plus my mechanic (the guy I originally bought the tractor from) died last spring and it is nearly impossible to get anybody else to do that sort of unsheltered, onsite work. So, I'm going to trailer it in to the current Kioti dealer here and do my best to convince them to have it rebuilt rather than installing a replacement unit.
One way or another, this is going to cost me...
Thanks, again...this forum has some great folks.

 

[Kioti Paul]

Ohhh, bummer! Mine broke around 500 hrs, now I have 1,200 hrs. Looks like I may be having a 'relapse' shortly. Yikes!!

 

[jimglassford]

If you decided to work on the injection pump yourself, or have a third party work on the injection pump, Take a lot of pictures and share them with the forum. We all keep learning.

 

[rd_macgregor]

Working on it myself would only be marginally superior to turning a chimp loose on it! My mechanical competence is minimal, and my lack of confidence in the outcome of any mechanical repair task I undertake is well-justified. On the other hand, on those rare occasions where I undertake a repair and it actually works, it yields an extraordinarily satisfying sense of accomplishment. Since I don't have a backup tractor to see me through, I'm not in a position to take a risk of a botched job leaving me tractorless for a long period...the horses get hungry without their round bales.
It looks like the local Kioti dealer has no qualms about having the injector pump rebuilt, so that should lower the cost a bit.
Thanks, again, for all the encouragement.

 

[LouNY]

One option you could consider would be removing it and sending it to be repaired.
There is a member here "the pump guy" that does rebuilding if you contacted him he could give you a price.
Might be nice to have another price in your head when talking to your dealer.
Also you could contact your loacal diesel shops to see how they compare.

I now see that your pump may not unbolt like the ones that I am used to,
the link is to an interesting article on Kioti pumps;
IP Removal

 

[jimglassford]

The Injection Pump on the DK45SC unbolts like any of the others. It is the same design. A new IP will cost $1,400 for the part alone. It is very easy to unbolt and send in. I did the same with my DK55 when I thought it was the issue. It cost me $550 for an evaluation and new seals. The fuel injection repair place found nothing wrong with the IP.

 

[rd_macgregor]

I've had my tractor back for a few days and it seems to be working great again. I hope this will be a permanent fix this time.

My wife got tired of worrying about down-time, so she bought a used Kubota 2650 as a back-up unit. I'm hoping she'll find her new tractor easy enough to operate that she'll take over more of the horse chores (hah!).

 

[jimglassford]

I've had my tractor back for a few days and it seems to be working great again. I hope this will be a permanent fix this time.

My wife got tired of worrying about down-time, so she bought a used Kubota 2650 as a back-up unit. I'm hoping she'll find her new tractor easy enough to operate that she'll take over more of the horse chores (hah!).

What was the diagnosis and the total bill?

 

[Sean2202]

Thanks everyone for sharing here. I have a DK45S engine model 4A220 LWB serial number HD7300273 that I am experiencing the same symptoms of the OP. Hopefully it doesn't turn out to be my injection pump!