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TC29D Possible electrical gremlin solution

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reddawg
Join Date: Dec 2008
Posts: 14 So. Cal.
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2009-10-31          166631


So I've been enjoying the same frustrating electrical problems that many of you Go Big Blue owners have been experiencing... faulty gauges, starting problems, etc.

One of the issues my machine was having was that the glowplug light was coming on while the engine was running. This of course was sending voltage to the glowplugs in the running engine, making them run hotter than they should, eventually burning them out and making the thing a bear to start in the cold of the early morning hours. (If it would start at all!)

To solve the above problem, I replaced the glowplug timer module (P/N SBA385870301) at a cost of +/- $65.00. And I also put in a new set of glowplugs, +/- $35.00 ea. This has (so far) solved the major starting issue.

Many of you have experienced the problem with the main fuse blowing all the time. Easy fix for me was to replace the fuse holder with one purchased at my local auto parts store for about $5.00. Pop in a standard 30 amp fuse and presto... no more blown main fuses. And if it does blow, it's just a standard fuse, not a factory high dollar one.

Had another interesting issue with the starter and solenoid. Seems that the original (or replacement?) starter was installed with the factory shipping boot still in place. This made for a less than satisfactory contact of the main battery cable to the starter. Remove that shipping boot and get a good contact.

Finally, I also had to replace a few of the relays. (In retrospect, I think this was due to the faulty glowplug timer.) These are also an off the shelf item from your local auto parts store for around $10.00 each.

So all told, I'm about $200.00 in electrical parts and it seems to be working correctly. I really think the culprit was that glowplug timer. It's a costly little electrical part, but if that's what fixes it, so be it.

Good luck to you Big Blue owners out there.




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TC29D Possible electrical gremlin solution

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treeman
Join Date: Feb 2002
Posts: 251 Wisconsin
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster  View my Photos  Pics

2010-12-06          175562


Thanks for taking the time to let us know what you found. :) ....


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TC29D Possible electrical gremlin solution

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reddawg
Join Date: Dec 2008
Posts: 14 So. Cal.
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2011-01-03          176173


Well, a bit of an update is in order. Usually its nice and sunny in these parts (Southern California, Sandy Eggo area)but this year we're getting a pretty good amount of rain. The TC29D has been parked outside lately (due to other things invading it's usual parking space!) so it's had quite a bit of wet weather to deal with.

It ran just fine on Christmas eve when I spent a few hours grading the road, but then 4 days later when I went to start it after a pretty big storm, no go. It would turn over, but not start and no smoke out the exhaust. A few phone calls to my local diesel mechanic friends narrowed down the diagnosis to the fuel shut off solenoid.

Sure enough, no voltage in the wire to the solenoid. Did a jummper wire straight to the solenoid to test it and the machine fired right up. Now to find out why there was no voltage to the solenoid wire. Traced the wire (and used parts diagrams and schematics) to the little micro relay that controls the solenoid. Long story short (I know, too late) I removed and cleaned each and every relay and the connections with brake cleaner and re-installed them. Sure enough, the machine fired right up. Best I can tell, these NH CUT's just don't like to get wet!

I remember reading another thread that Earthworks said he found his TC33D with the lights flashing for no apparent reason. Well, same thing happened this time to mine. Looks like moisture got into the switch and caused all kinds of electrical havoc... lights flashing on and off, etc. At one point during start up, I could even hear the glow plug relay "buzzing" like it was wet.

Oh, and all those other "fixes" that I did in the OP are still working just fine. (Just don't park it out in the rain!)

....


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TC29D Possible electrical gremlin solution

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treeman
Join Date: Feb 2002
Posts: 251 Wisconsin
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster  View my Photos  Pics

2011-01-03          176177


Maybe that is why I haven't had any electrical problems yet. It is always inside and never power washed. Thanks for the heads up though. ....


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