CK25 will not start
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grsthegreat
Super Star Member
is not that their faulty..... i have seen injector pumps fail on alot of different pieces of equipment.
I also saw a brand new Bosch pump fail immediately after it was installed.
I just dont understand why there that expensive myself...
Their pretty easy to replace....but if you look at one closely they look like they should cost about $100.00
I mean an old Holly Carb was WAY more intricate.
Gittyup
Elite Member
- Joined
- Oct 4, 2007
- Messages
- 3,145
- Location
- Mid Atlantic
- Tractor
- Kioti CK25 Shuttle Shift, loaded tires, JD X739
Some were defective (on certain model years), and Kioti knows it. They had brittle gears in them. New design changed to better alloy gears. I'd at least ask about it. they might at least help you out on cost.
My ck30 wouldn't start one morning, looked at these threads and didn't want to believe it could be my injector pump. Replaced my fuel pump, but still wouldn't start and still had no fuel to injectors. Took a deep breath and decided to bite the bullet and order the pump $800+. Took a deeper breath and tore into the engine, wasn't too bad, I downloaded a service manuel (free). When I got the pump out the rack was jambed with something?, I worked it back and forth and freed it up but used the NEW pump just to be sure, Started it up today and it runs great! Saved myself some money, nearest dealer is 4 hours away now. Not a hard fix, just frustrating as most of the nuts are hard to access at 1/8 turn at a time.
Well still have not started the CK25 yet. I had no time to work on it extensively just a 1/2 hour here and there. The latest is that I can get fuel up to one cracked line at the cylinder head. Can't get the others. Odd thing is that at the top of the injector pump if I crack the not on the line (#2 in the picture) I get nothing. If, I crack the nut closets to the pump housing (#1 in the picture) I get fuel gushing out. Tighten everything up and crack the nut at the cylinder head...nothing.
So my guess is that the pump is ok and it's just a matter of finding the best way of bleeding these things.
So my guess is that the pump is ok and it's just a matter of finding the best way of bleeding these things.
I am having the same problem with a dk45s and after reading and looking at diagrams/pictures of the injector pump (ip), it appears that fuel from the fuel line that goes in at the bleed bolt area will put fuel in a fuel chamber in the ip. Until the pump rack inside the ip rotates a gear to move a plunger(with groove) to line up with a hole in the ip fuel chamber you will not get fuel to be pushed into the injector line(#2 in your picture). I believe the fuel you are getting close to ip housing is just fuel from ip fuel chamber which does not mean your pump is working, but could mean it is not working. Others who know more than I should also comment before you rule ip failure.
Hope this has not discouraged you i am only trying to pass on what I think I have learned so far.
Hope it is just air
ritcheyvs
Veteran Member
Between #1 and #2 in your picture is the delivery valve which acts as a check valve and also opens only when pressure exceeds a threshold. In operation, it ensures that the IP plunger will suck new fuel from the filter on the downstroke vs sucking fuel out of the pipe that feeds the injector. The fact that fuel comes out from #1 tells you that you do have fuel coming from the lift pump into the IP. The fact that you don't have fuel coming out #2 means either you have air in the IP (unlikely) or your IP (at least the associated plunger) is not pumping. You may have the same problem as sherrym. But the fact you get fuel at one of three injectors makes me think your IP has stripped gear and/or rack teeth corresponding to the "dry" injectors.
Try operating the manual fuel shutoff to see if you can feel the IP rack move; try this with ignition key both off and on. If you can feel the rack move (i.e. it's not jammed) and you get no fuel at the top of the delivery valves while cranking it's probably your injection pump (IP). The good news is it isn't hard to replace. The bad news is the part (IP) costs over $1k). These things should never fail (IMO) but it seems failure is common; maybe you and your dealer can embarrass Kioti into sharing some of the cost?
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thanks Scott for clearing that up. After i looked at section in EX45 about timing i saw where fuel at that site was not fuel from the fuel chamber but as you said a delivery valve. Will try to be more careful next time before comment.
I wonder if i should check fuel at delivery valve site also, we have only checked it at nut at injector line 1 above delivery valve nut?
ritcheyvs
Veteran Member
It's best not to unscrew delivery valves unless you really need to. They can be touchy and may not reseal correctly.
Also, it won't tell you much. If the plunger/gear is in the fuel cutoff position the vertical slot in the plunger aligns with the feed hole allowing fuel to flow right past the plunger (under pressure from the lift pump). But lift pump pressure is way less than what's required to open the delivery valve.
Also, it won't tell you much. If the plunger/gear is in the fuel cutoff position the vertical slot in the plunger aligns with the feed hole allowing fuel to flow right past the plunger (under pressure from the lift pump). But lift pump pressure is way less than what's required to open the delivery valve.
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