TC33D

fancyhorse · Apr 4, 2015

tractor won't start. Instrument panel 1st light won't light up.??I ordered 3 new glow plugs but don't know where they go. Help. Illustration would be helpful.

LarryD · Apr 5, 2015

You need to be specific on what the tractor is doing. Does it turn over, do the dash lights come on, or nothing at all happens.
Make sure the PTO levers are off, the shift lever is in neutral, and the parking brake is set. There are a bunch of possibilities to go through before I would replace the glow plugs. Those are only a starting aid.

rgr33 · Apr 5, 2015

I wonder if the safety switch under the seat is malfunctioning. You can jump them with a piece of wire to test them.

RDrancher · Apr 5, 2015

From the glow plug reference I gather that you're talking about the first light on the left. Here is another thread discussing the same issue. http://www.tractorbynet.com/forums/new-holland-owning-operating/49960-glow-plug-light-tc35d.html

It could be a safety switch, but I would first check all of the fuses / relays behind the gauge panel and remove, clean and reinstall the frame end of the negative battery cable.

fancyhorse · Apr 5, 2015

fancyhorse said:
tractor won't start. Instrument panel 1st light won't light up.??I ordered 3 new glow plugs but don't know where they go. Help. Illustration would be helpful.

Larry, thank you for responding. Yes all is as you say, PTO, neutral, 4 wheel drive, parking brake, all is where it should be when trying to start. Yes it turns over when trying to start (new battery last fall). Yes lights go on on dash except for the 1st one (looks like a light bulb).

LarryD · Apr 5, 2015

OK, If there is enough power to roll the engine over then I would start looking past the battery. You glow plug light should light, although a diesel needs to roll fast to fire up.
Make sure the PTO light is not staying light after the first few seconds, that could mean a wire has become detached...been there

.
The relay powering the glow plugs could be failed but that would just make it hard to start... not stop it from starting.
I had my brake switch move and not make good contact but if I sat in the seat it made no difference.
I would check the seat switch as well. Do you have a meter? If we're going to diagnose this over the interwebz it may take some time, be patient.
And read the thread JDRancher linked to...it covers numerous problems.

fancyhorse · Apr 6, 2015

ok will check PTO lite/wire, seat switch, etc. today. Do not have meter. Need to fill container with huge pile of horse manure/shavings today?hope it starts?wish me luck

LarryD said:
OK, If there is enough power to roll the engine over then I would start looking past the battery. You glow plug light should light, although a diesel needs to roll fast to fire up.
Make sure the PTO light is not staying light after the first few seconds, that could mean a wire has become detached...been there .
The relay powering the glow plugs could be failed but that would just make it hard to start... not stop it from starting.
I had my brake switch move and not make good contact but if I sat in the seat it made no difference.
I would check the seat switch as well. Do you have a meter? If we're going to diagnose this over the interwebz it may take some time, be patient.
And read the thread JDRancher linked to...it covers numerous problems.