Cat 236b won't start

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yknot111

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Jan 27, 2008
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6
I washed out my Cat 236b and then when I got out to the jobsite it wouldn't start. It had power at first, all the lights turned on. But then after a few tries everything went dead. Battery has power and I am at a loss.
 

Tazza

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Have you checked your fuses?
You may have gotten water in a connector in your harness thats causing your problems. Depending on what you used to clean it, the pressure may have dis-lodged a connector somewhere? had enough contact to work for a while then opened up enough to stop?
Just an idea.
 
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yknot111

Member
Joined
Jan 27, 2008
Messages
6
Have you checked your fuses?
You may have gotten water in a connector in your harness thats causing your problems. Depending on what you used to clean it, the pressure may have dis-lodged a connector somewhere? had enough contact to work for a while then opened up enough to stop?
Just an idea.
I had the back open and used a water hose to clean it out. I have checked all the fuses and the main breaker switch. The breaker switch was never tripped, none of the fuses were busted. I even replaced 2 relays that I thought had tripped, but nothing. When you get in the cab and turn the key nothing happens. NO lights, no Chime, not even the fuel meter registers. I have checked the power going in and out of the Starter and Main Breaker. I can honk the horn and turn on the inside cab light but the outside lights do nothing. I called Holt and talked to Tech Support they told me to check all the fuses and Main Breaker and to disconnect and reconnect anything that is/was connected, still nothing. Any suggestions will help. Thank You
 

Tazza

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I had the back open and used a water hose to clean it out. I have checked all the fuses and the main breaker switch. The breaker switch was never tripped, none of the fuses were busted. I even replaced 2 relays that I thought had tripped, but nothing. When you get in the cab and turn the key nothing happens. NO lights, no Chime, not even the fuel meter registers. I have checked the power going in and out of the Starter and Main Breaker. I can honk the horn and turn on the inside cab light but the outside lights do nothing. I called Holt and talked to Tech Support they told me to check all the fuses and Main Breaker and to disconnect and reconnect anything that is/was connected, still nothing. Any suggestions will help. Thank You
You said the battery has power, but batteries can go dead at any time. They may still show voltage but have no current stored (if that makes sense). Can you try hooking another battery in just to be sure?
Not trying to be a smart ass, but batteries these days can just go stone dead.
 
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yknot111

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Jan 27, 2008
Messages
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You said the battery has power, but batteries can go dead at any time. They may still show voltage but have no current stored (if that makes sense). Can you try hooking another battery in just to be sure?
Not trying to be a smart ass, but batteries these days can just go stone dead.
I will try that in the morning. I had tried to jump start it with a truck. I have only tested it with the Voltage meter at all points to see if I can find a short.
 

Tazza

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I will try that in the morning. I had tried to jump start it with a truck. I have only tested it with the Voltage meter at all points to see if I can find a short.
I hope its as simple as a battery, hose pressure shouldn't have done anything.
 
Joined
May 14, 2008
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I will try that in the morning. I had tried to jump start it with a truck. I have only tested it with the Voltage meter at all points to see if I can find a short.
I agree with the others, Its a loose connection. But I'm going to switch it up and say its a loose/ corroded connection ground wire, not at the battery, where the ground wire bolts to. Quick test is, connect the neg post to jumpers, connect the other neg jumper to a known good ground on the tractor. See if it starts or at lest clicks. IMPORTANT, AT NO TIME SHOULD ANY JUMPER CABLE BE CONNECTED TO THE POSITIVE POST DURING THE QUICK TEST. let us know how it went
 
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yknot111

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Joined
Jan 27, 2008
Messages
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I agree with the others, Its a loose connection. But I'm going to switch it up and say its a loose/ corroded connection ground wire, not at the battery, where the ground wire bolts to. Quick test is, connect the neg post to jumpers, connect the other neg jumper to a known good ground on the tractor. See if it starts or at lest clicks. IMPORTANT, AT NO TIME SHOULD ANY JUMPER CABLE BE CONNECTED TO THE POSITIVE POST DURING THE QUICK TEST. let us know how it went
I had to give up. I took it to Holt and they had it for about a week. I am not really sure exactly what they did but they did use jumpers and replaced a few "diodes" or something. I had them do the preventative maintenance on it and i just ended up having to pay for that. The rest was under warranty. Thanks to everyone who tried to help me out with this!
 
Joined
May 14, 2008
Messages
17
I had to give up. I took it to Holt and they had it for about a week. I am not really sure exactly what they did but they did use jumpers and replaced a few "diodes" or something. I had them do the preventative maintenance on it and i just ended up having to pay for that. The rest was under warranty. Thanks to everyone who tried to help me out with this!
The only diodes that would a failure like that would be in the alternator. all alternators are ac.-alternating current. Batteries are dc.- direct current So they use a diode tree to convert the electricity. 3 diodes going one way. 3 the other way. If a diode was at fault the alt. would suck the battery dry.
 
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