Kubota diesel block heater/glow plugs revisited

RayP(MI) · Dec 13, 2013

From below.... Crawled over it very carefully this morning. Block has D722 cast on the side. If there's any freeze plugs I didn't note any.
There are no electrical connections in block or head that would indicate glow plugs. There are no electrical connections in the air intake to indicate a electrical pre-heater there either. Ignition key has 3 positions - Off, Run, Start. Apparently no provision for a glow plug selection. Will not turn counter-clockwise from the ON position.
I'm confused. Especially in view of the posts on my question from last night.. Got any Ideas, guys?

Ivan in Mich · Dec 13, 2013

I have a Kubota in my skid steer and it is very cold blooded. My key sounds like yours but to the right of the switch there is a push button for the glow plugs. On my the freeze plugs are on the starter side and to the lower part of the block. I do know that on some of the tractors you had to put the switch in the start position and the glow plugs would heat and when a light came on you could start it. The glow plugs were on a timer. Hope this helps some. You had better get it going as the snow storm is headed your way. Ours is going to end this afternoon

Case Nutty 1660 · Dec 13, 2013

what is your model # I found on line a ops for a FZ25D and they say the glow plugs are activated by the switch being turned counter clockwise like the posters below said, could the switch have been changed out? or if yours is a different model and you did not get a ops manual post the model and I can look it up on the Woods page
cnt

Ivan in Mich · Dec 13, 2013

I forgot to add that if you add a bock heater get one from Napa as they are about 1/4 the price than Kubota is.

jon f mn · Dec 13, 2013

I only drove 1 Kubuta, and that was just a week or so back. On that one the glow plugs were activated by pushing down on the key in the on position just like my big truck.

Jerry He · Dec 13, 2013

Glow plugs should stick straight up from head by valve cover, they will be hooked together by a heavy wire or a metal strip. You will have as many terminals as you have cylinders. Use jumper wire from hot side of battery to the terminal strip should spark a little if any of the plugs are working. Heat for 15-20 seconds and start.

Ivan in Mich · Dec 13, 2013

If this is the engine I think it is the glow plugs are on the injection pump side and stick out at a slight angle. On mine one is behind the lines in the pump and the front is buried under my filters but mine is a 4 cyl engine

Kansas4010 · Dec 13, 2013

On mine you turn the key clockwise till just before the starter engages and hold it there. A little light comes on with wavy lines. You hold it there for a couple seconds then go ahead and hit the starter.

RayP(MI) · Dec 13, 2013

It is a Woods 6215 Mow'n machine. Specs a 21 hp Kubota diesel engine. I did note 3 ports on the side of engine, look like freeze plugs - but are onl;y about 3/4 inch in diameter. Can you get a block heater that small? Lower radiator hose is not promising for heater in there either. (runs upward from engine).

Check link for pictures.
woods 6215

Ivan in Mich · Dec 13, 2013

Take your motor model number and go to napa and they should have a book on block heaters for your engine. It should like you have found the freeze plugs,

Ivan in Mich · Dec 13, 2013

I think they told me it needs to be in the freeze plug the farest from the rad for best results

Case Nutty 1660 · Dec 13, 2013

Ray I had the ops and parts manual PDF sent to my e-mail I can forward it to you if you like my e-mail is [email protected] it states in the ops that the key turns counter clockwise on this model so if yours odes not my guess is that someone has installed the wrong switch at some point I did not look up in the parts for a block/head htr drop me a line if you would like the manuals sent to you via e-mail
cnt

rrlund · Dec 13, 2013

See if Roeters over to Grant,Taylor up north of Barryton or Worthington over to St Johns have a manifold heater out of a parted out Oliver or White. They work great in this 354 Perkins 6 cylinder 1850 and the 478 Hercules in the 2-135. They should heat that little Kubota up in a hurry. It's just a heating coil. You'd have to drill a hole in the intake tube somewhere and mount it just ahead of the manifold. A guy up by Enrtican told me the one in his 2-70 never worked,but he said it was because it was mounted in a rubber hose. Said he ran a ground wire to it and it worked fine after that,so something to keep in mind when you mount it.

RayP(MI) · Dec 13, 2013

Jerry, you are right - had to unbolt the hood (engine cover) to find them. They're hidden behind the injectors. Now to see if I can figure out what's supposed to activate them. No buttons, no provisions on the ignition switch I can see. Still think I need something to preheat that engine. Sure didn't want to start on its own this morning. It's not my prime snow plower, so not a big deal. Got a 4wd truck and blade, and back blade for the tractor.

Bill(Wis) · Dec 13, 2013

Like Kansas 4010 said. Turn the key to on and then keep turning it slowly to the right and you should hear a click. That will be the glow plug relay. Hold it there for 5-10 seconds and then start.

jm. · Dec 13, 2013

RAY Your d 722 definitely has glow plugs. See that long metal strip right down the top of the head next to the injectors that is what powers the glow plugs.

Ken Macfarlane · Dec 13, 2013

My Kubota the key just gets moved to the run/on position, there is a glow timer that runs them short time if hot, long time if cold out.

Once light goes out crank it. Never failed yet even down to -36 C, no block heater on the tractor, original battery 11 years old.

My MF you have to hold the key half way sprung to the start position.

buickanddeere · Dec 13, 2013

Even if it does start at -35F without a block heater. There are still valid reasons for preheating the engine.

Jeff NWOH · Dec 13, 2013

Try turning the key backwards. That's how you preheat on my Grasshopper.

Bill(Wis) · Dec 13, 2013

He said he tried that. Key doesn't turn counterclockwise.

Tim (Ga) · Dec 13, 2013

I have seen two other ways to turn on glow plugs. 1. Like Jon f mn said push in on key in the run position. 2. If there is a long distance when turning key from run to crank. In that area if you hold before cranking the glow plugs will light. If no glow plug switch. Add a momentary switch from bat to plugs.

Mike M · Dec 13, 2013

I'd be contacting Woods for owners manuals on the mower and the attachments.
Also call a Woods dealer and ask about if they sell an optional block heater.

Ken Macfarlane · Dec 13, 2013

Oh I agree. Important ones like improving oil flow to the top end and less important like the heater actually warming the cab within the first 10 min of snowblowing.

I just don't have power where it is parked. I'd love to have the hydraulic oil prewarmed.

Kubota diesel block heater/glow plugs revisited

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