Tc25d won't start
- Thread starter Doug4speed
- Start date
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McTowner
Member
Doug, do a search on this forum or google. TC33 solenoid / relay problem. There was a post about someone having a similar issue. I am fairly certain TC25d, TC29d, TC33d are identical in regards to the fuel system.
dlctcg
Platinum Member
@Doug4speed - A bunch of good info above especially making sure you have a clean fuel supply & it is flowing freely from the tank to the fuel filter bowl. You can easily remove the incoming line at the fuel filter bowl to drain / check flow.
A couple things to check being it is a NH... the glow plugs seem to be working based on the dash light & the tractor is actually turning over just not firing...
On the TC series the seat switch and the parking brake switch will not stop the engine from turning over. However they do cause the the fuel solenoid to shut off, so I would check both of those. If either one of those safety interlocks are not working the tractor will turn over... but WILL NOT start. I would check the seat switch first as it is a more common problem than the brake switch; you can unplug the switch under the seat & just jumper the tractor harness connector with a short piece of wire to test it. If it fires you have a seat switch issue.
If it doesn't start I would make sure the fuel solenoid is operating as others have mentioned... There are a few other gremlins the TC's are known for but I would start with these as they are pretty common issues.
A couple things to check being it is a NH... the glow plugs seem to be working based on the dash light & the tractor is actually turning over just not firing...
On the TC series the seat switch and the parking brake switch will not stop the engine from turning over. However they do cause the the fuel solenoid to shut off, so I would check both of those. If either one of those safety interlocks are not working the tractor will turn over... but WILL NOT start. I would check the seat switch first as it is a more common problem than the brake switch; you can unplug the switch under the seat & just jumper the tractor harness connector with a short piece of wire to test it. If it fires you have a seat switch issue.
If it doesn't start I would make sure the fuel solenoid is operating as others have mentioned... There are a few other gremlins the TC's are known for but I would start with these as they are pretty common issues.
thclimer
Veteran Member
These are the scenarios that I could not remember that will allow the engine to crank but not start! I'd be betting its one of them, probably the bypassed seat switch has become un-bypassed.
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Doug4speed
New member
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- Feb 27, 2022
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- Tractor
- New Holland tc24d
Hey guys I appreciate all the help sorry it took so long to get back with you I've been busy. This was very easy fix I've learned a lot about this tractor from all the helpful
posts I am not a mechanic and I don't claim to be one I can change parts. throttle cable came apart underneath the dash so fuel pump wasn't pumping any fuel into cylinders. I know should have checked that first but I have new starter, battery,new filters so I've learned something and tractor is running great. Thinks for all the help
posts I am not a mechanic and I don't claim to be one I can change parts. throttle cable came apart underneath the dash so fuel pump wasn't pumping any fuel into cylinders. I know should have checked that first but I have new starter, battery,new filters so I've learned something and tractor is running great. Thinks for all the help
thclimer
Veteran Member
Glad to hear you back running and thanks for letting us know what the issue was so other can learn in the future. It sure is amazing how such a simple issue can cause so much effort.
