Ford 1700 glow plug

[geozeitl]

Hello, l own a Ford 1700 tractor, nice tractor but its eating glow plugs. I get about 4 uses out of them and they burned out. All electrical is good and ignition switch checks out. Would there be a possibility of something inside the head that's worn l am using l believe the correct plugs sba185366010 . Any advise would be appreciated. Geo

 

[radios1]

it looks like they are getting too much voltage, and overheating!. or they are just staying on too long, and burning out.. I don't know what voltage these are supposed to get. it don't have anything to do with something inside the head being worn, though.

 

[geozeitl]

Thank you for the advice. Getting about 10 volts to the plug when activated and no power to them when engine is running.

 

[radios1]

Thank you for the advice. Getting about 10 volts to the plug when activated and no power to them when engine is running.

the tractor is decades old, so, if there was a common problem with the glow plugs, it would have been mentioned on the web somewhere, but there is no mention of it..

 

[Dataway]

If it's similar to a 1720 then the only components the power supply to the glow plugs goes through is the ignition switch and the safety start switch. Makes me wonder if there is an intermittent short in the ignition switch or safety start switch that is energizing the glow plugs while the engine is running.

Is the safety start switch attached to the clutch pedal? Just wondering if the short only happens when the tractor is being used as opposed to just sitting in neutral and running.

Could probably be tested by hooking up the VOM to the glow plug with the ignition in the RUN position, have someone watch it while you manipulate the clutch, transmission, PTO .... or whatever the start safety switch is hooked up to.

 

[geozeitl]

There may have been a safety at one time but its not there now. May have been removed by the previous owner I did have the tractor idling and checked with a dc volt meter at the plug didnt notice any voltage. Unless it happens periodically.

 

[geozeitl]

There may have been a safety at one time but its not there now. May have been removed by the previous owner I did have the tractor idling and checked with a dc volt meter at the plug didnt notice any voltage. Unless it happens periodically. I didnt mess with the clutch or try throttling more. I agree not much about glow plugs burning out on the 1700. The plugs are pricey at $14 a piece, Spend more on plugs than i do on diesel fuel.

 

[Peter 315]

Does it have a glow plug timer or just the key switch to heat them up, The old chevy diesel would cook the glow plugs if the timer was messing up, anything longer than one minute ...

 

[geozeitl]

It just has the the ignition switch, turn key to left and glow plugs are activated l only hold it for about 15 seconds. Also when the key is turned to the right to crank the engine the plugs are also activated. Only in the run position they are off

 

[Peter 315]

Does the glow plug indicator work ?

 

[geozeitl]

Indicator works, when l put new plugs into works great but you can tell after about 3 uses it really slow lighting up and when the plugs are toast it doesn't light up at all

 

[Peter 315]

When you turn the key right to start I wonder if the glow plugs are getting to much juice and burning out. If you hooked a light to the glow plugs it would show when they or on and how long

 

[Peter 315]

glow plug review on amazo* Garbage.... lasted 2 startups and Then burnt out. idk junk plugs.....:confused3:

 

[geozeitl]

I wondered that myself but l found some NGKs and the same thing happened.

 

[Peter 315]

I found a picture of the back of the key switch # 19 glow plug resister # 17 glow plug resister and glow plugs

 

[geozeitl]

Can you post it

 

[Peter 315]

Here you go, You might have to buy a service manual for the tractor Amazon.com: 7298283 New Ignition Switch for Ford New Holland 1 11 12 13 15 +: Industrial & Scientific

 

[geozeitl]

I think that is my next ste, changed the indicator, plugs, there is no safety switch. Thanks for your research l'd buy you a beer if l could

 

[Peter 315]

Let me know how you make out with the new parts..

 

[HakanTh]

I think the problem is at the injection/compression/combustion processes, see this information (page 6):
https://www.boschautoparts.com/documents/101512/0/0/0b189154-b815-46d7-bf70-e153bb6ecb88

At over-voltage you get a swelling/melting from the inside out (or no visible damage). The damages on your plugs seem very much to come from cold diesel fuel sprayed over the hot tip of the "bulb", causing it to crack, when the engine is running.

Do not buy anything yet, apart from plugs.
Check the timing and the injectors, before you put the new plugs in.
And look for/clean out parts from the damaged plugs inside the cylinder.


I found a wiring diagram at New Holland Online Parts List during my research. I thought it may be of use, maybe not for this problem but it is always nice to have:
Official New Holland Online Parts Store and Online Parts Catalog for New Holland and Ford Tractors.