ck 25 glow plug relay ???

[bailbud]

my tractor just kinda started to have trouble starting . I checked my gp's and one tested open with my multimeter so I finally got it replaced but still not wanting to start right . When I unplug the connector going from the relay to the gp's and turn the key I get batt voltage however when I plug in the connector or as it should be to start and turn the key I get .12 volts at the gp . Not sure if the relay is over loading or failing under load , I ran out of light tonight . Any ideas on what to check next ? it will start with enough cranking or sticking my heat gun in the air intake . After starting it runs perfect and will start again fine when warm. the new GP looks a little diff than the old one but they are from diff manufactures . its an 07 with 1700hrs.
what I read tonight the relays get dirty maybe should clean ? Full day of work tomorrow hopefully can have a look tomorrow

 

[Roadworthy]

You may have dirty or pitted contacts in the relay. The added resistance can prevent current flow. Many relays are sealed and contacts cannot be cleaned. The low resistance of a glow plug could cause all the voltage to drop across the relay contacts.

 

[k0ua]

Your next step is to replace the glow plug relay. If the contacts are a high resistance then the severe voltage drop you are seeing could occur. By definition, you are not delivering any current to the glow plugs because of this severe voltage drop.

 

[34Willys]

Ohms law. Depending on where you are measuring voltage, current should be high and voltage low when relay contacts close.
So .12 volts is probably correct.

Patrick

 

[k0ua]

Ohms law. Depending on where you are measuring voltage, current should be high and voltage low when relay contacts close.
So .12 volts is probably correct.

Patrick

Uh. no it is not correct.

 

[Kioti Paul]

Sure sounds like the relay to me; or a loose or corroded connector. From reading many threads, the relays do seem to give a lot of trouble.

Even when cranking with the starter, the voltage drop should be just 2-3 volts. The GP's do take quite a bit of current, but nothing like the starter. The voltage drop (I think) would normally be less than 1 volt.

The relay(s) on my DK45 are sealed, and cannot be disassembled for cleaning; but they are also a common relay used in many automotive applications and can be found in most automotive parts stores.

Also, my tractor, and many others have 1 or 2 other identical relays located right next to it. They can be 'swapped' in order to 'verify' the problem - Of course, that will cause a different 'circuit' to not be operable (probably the starter, or the fuel solenoid)


Edit: I re-read your first post,,,,, if your relay is wired the same as mine, (in the plug for the GP relay) one wire should ALWAYS have battery voltage (regardless of the position of the ign switch), another wire should have battery voltage when the ign switch is in the RUN position (or "glow Plug" position).

 

[bailbud]

OMG after an hour of looking through my manual on the computer I still cannot find where or which is my GP relay . All your responses were helpful . I called my closest dealer and they said the relay is on back order so I am hoping if I can locate the correct relay I can take it into my parts store and they can find something for me . Was pondering today and was wondering if I can run a jumper wire from the batt to the GP'S for 8-10 sec to warm things up for a start up with out wrecking anything else until I can replace the relay?

 

[rademamj1]

You can buy the Kioti glow plug relay on Ebay at following link. I am pretty sure it fits all the 3 cylinder diesel engine models in the entire Kioti lineup, from CK to DK to NX models. The first link is standard 5-pin relay. Second link is standard 70Amp 4-pin glow plug relay for most CK and DK tractors.

eBay


https://www.ebay.com/i/263051151503...0aevR3rVi5851L2nBgvIXAbQl3GlU5phoCCcMQAvD_BwE

 

[k0ua]

OMG after an hour of looking through my manual on the computer I still cannot find where or which is my GP relay . All your responses were helpful . I called my closest dealer and they said the relay is on back order so I am hoping if I can locate the correct relay I can take it into my parts store and they can find something for me . Was pondering today and was wondering if I can run a jumper wire from the batt to the GP'S for 8-10 sec to warm things up for a start up with out wrecking anything else until I can replace the relay?

You can but it better be a stout one, able to handle up to 60 or 70 amps. If you run a small wire it will heat white hot instantly and burn your hands just before it acts like a fuse and burns open. I wouldn't run anything smaller than number 8.

Ohm out the glow plug rail with the glow back to the relay contact. or note the wire color code and trace back to the relay. Should not be a problem to figure out the relay. I don't own a CK 25, but my DK35 has three relays on the dash, one 70 amp rated contacts for the glow plugs and the others are rated for 40 or 50 amps, I can't remember for sure. They are standard automotive relays, best purchased at the auto parts store. You could buy 10 of them for what Kioti wants for one. Be careful of diagrams showing the placement of the relays, because people swap around the harness plugs, and you cannot be sure which one is which. Also since the fuel solenoid and starter solenoid relays are rated for less current, that may be why your relay is burned up to begin with.

 

[Kioti Paul]

BailBud, sorry, even after reading your 1st post several times, I still misunderstood where you were measuring the voltage (I thought you were checking at the relay plug - I do not know why I thought that!)

Since you get 12 volts at the GP when you turn the ign on, I would think the relay is obviously energizing. My relay makes a distinct "click" when energizing. I would think - if you can get a helper - have that person turn the ign on / off while you listen carefully for the "click" ; maybe you could trace it down that way.

My DK45 is a 2008 model, the fuel tank is behind the engine, the relay (3 of them) are on the heat shield between the engine and fuel tank - I have NO idea if your tractor is configured the same way. Look for a small, black "box" (2" cube +/-) with 4 wires plugged into the bottom - probably on the 'firewall'.

Also, for cold starting you might give some 'starting fluid' a try (it's what diesels used before glow plugs). It is available at all auto parts stores. It is in an aerosol can, give it a 2 second 'shot' into the air filter inlet just before cranking (or better, AS the engine is cranking)

Best of luck!