Have to crank DK 45 SE longer to start

[seacap04]

Below freezing here in the mornings now. It now takes about about 30 to 40 seconds of cranking to start my DK. It usually takes a second a two after preheat. Smoke is coming out the exhaust as I crank. I can hear the usual relays close going into preheat. Runs completely normal after start up. It has just over 1700 hours and is a 07 DK 45 SE Hst.

I started teouble shooting with an inspection of the wiring harness. No visible corrosion or rodent damage. Next I swapped out 70 amp glow plug relay and checked preheat fuse. Good fuse and no change with relay swap. Bench tested both relays, both good. Dissembled and cleaned key switch, no dice. Measured voltage to glow plugs. No voltage, mmmm. Checked all glow plug connections, good Measured voltage battery side of glow plug relay. Good, so 60 amp slow burn fuse is good also. Next measured voltage on coil side of relay with relay removed. 11.5 volts, mmmm. Played with meter connections and tried several times still 11.25 to 11.5 volts. Low but still should be enough to activate relay. Measured resistant form coil ground to ground and it was good. Plugged relay back in and measured relay coil voltage under load. Measured several times as meter probe did not have a real tight connection stuck in back side of relay socket. .25 to .5 volts not enough to activate relay. Found the problem. I suspect the Preheat controller. I have not come up with a way to verify this. My factory manual has different wire colors to the connector than I have. The manual has one empty slot in the connector and I have two. Any thoughts would be very helpful.
Thanks Don

 

[MTGreen]

I'm not entirely clear -takes 30-40 seconds of cranking but takes second or two after preheat?
By pre-heat I'm assuming you mean the glow plugs energizing? Or do you mean restarting a warm tractor?
If glow plugs are meant, then you're saying your glow plug circuit is slow to energize on cranking or doesn't energize at all?

If it's not designed to allow you to manually activate the glow plugs without cranking, some tractors are able to be tricked by engaging the PTO and holding the key on crank. The PTO safety will not allow the tractor to physically crank but the electrical circuits i.e. glow plugs typically still work. Obviously this doesn't directly fix your problem but may aid in diagnosis or may provide a temporary workaround.

 

[thepumpguysc]

U mentioned everything but checking the glow plugs themselves.. taking them out and putting voltage to each and counting until they get red hot.. it’s been my experience that it should be 10 1 thousand..
Another thing I noticed in your explanation is.. no one is sitting in the seat.. if there’s a safety switch in the seat, there won’t be power TO the glow plug circuit..
Another work around would be to run a hot wire with an on/off toggle to the gp bus
bar..w alligator clips..

 

[seacap04]

MTGreen
Thank you for your response. My problem is no power is getting to the glow plugs. The relay that would supply the power has a large voltage drop at the coil that would close the relay. That voltage comes from the preheat controller. This is all activated by the key switch. Quick and dirty fix would be to cut the wire from preheat controller to relay and splice in a switched 12 volt power source. I am not at that point yet. But again thank you for your suggestions
Thepumpguysc
And thank you for your suggestion. The problem is before the glow plugs. I have no voltage to the the glow plug buss bar.

 

[DK35vince]

MTGreen
Thank you for your response. My problem is no power is getting to the glow plugs. The relay that would supply the power has a large voltage drop at the coil that would close the relay. That voltage comes from the preheat controller. This is all activated by the key switch. Quick and dirty fix would be to cut the wire from preheat controller to relay and splice in a switched 12 volt power source. I am not at that point yet. But again thank you for your suggestions
Thepumpguysc
And thank you for your suggestion. The problem is before the glow plugs. I have no voltage to the the glow plug buss bar.

Many years ago I had the same issue with my DK 35. (no power to the glow plug buss bar)
It was my preheat control box.
Replaced it and no problems since

 

[seacap04]

Vince,
That is the direction I am leaning in. I would have replaced it already but local dealer doesn't have it and Kioti is out off stock.

 

[DK35vince]

Is it Kioti part #T4620-69054
Ebay lists one

 

[seacap04]

Is it Kioti part #T4620-69054
Ebay lists one

Thanks Vince
I ordered it. Good price and free shipping. Should have it early next week

 

[DK35vince]

And the seller was Perrypower (Nolt's Power Equipment)
I've ordered parts from them in the past with very good results.

Power Equipment for Sale | Nolt's Power Equipment & Perry Power Equipment LLC Nolt's Power Equipment LLC & Perry Power Equipment

Nolt's has power equipment for sale in Shippensburg and Loysville, PA, including compact tractors, riding mowers, wheel loaders, articulating loaders, and attachments.

www.noltspower.com

 

[JimR]

MTGreen
Thank you for your response. My problem is no power is getting to the glow plugs. The relay that would supply the power has a large voltage drop at the coil that would close the relay. That voltage comes from the preheat controller. This is all activated by the key switch. Quick and dirty fix would be to cut the wire from preheat controller to relay and splice in a switched 12 volt power source. I am not at that point yet. But again thank you for your suggestions
Thepumpguysc
And thank you for your suggestion. The problem is before the glow plugs. I have no voltage to the the glow plug buss bar.

Does your ignition allow you to turn the key all the way to the left to activate the glow plugs? My NX4510HST has the automatic glow plug activation when turned to the on position or all the way to the left for manual activation.