632 Heater Problem

Just wondering if anyone can help me out. When I flip the switch for the heater it blows the main fuse on the machine. Sometimes it will run for a couple seconds and blow and others it blows instantly. I have the parts manual and have gone through the whole thing looking at the digrams and index. It shows nothing about a heater in any part of the manual except a block heater. Looking for a diagram of where its located so i can try to disgnose it better or maybe someone can just tell me if they know where it is. Machine is a 1978. Thanks

Sound like it needs a good cleaning filter maby a bearing look up Old machinest in the forum and email him he is a wealth of info

antfarmer2 said:

Sound like it needs a good cleaning filter maby a bearing look up Old machinest in the forum and email him he is a wealth of info

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Is it a electric heater or does it use engine coolant?

OldMachinist said:

Is it a electric heater or does it use engine coolant?

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I'm not sure to tell you the truth. I was hoping to find a diagram to figure out where exactly the heater is located so I can diagnose better. I haven't been able to dig into it much but I think I might have to remove the seat and panel underneath to get access to front of engine, where I'm guessing it is. But was hopin someone knew just in case I didn't have to do all that. haha

tyus4 said:

I'm not sure to tell you the truth. I was hoping to find a diagram to figure out where exactly the heater is located so I can diagnose better. I haven't been able to dig into it much but I think I might have to remove the seat and panel underneath to get access to front of engine, where I'm guessing it is. But was hopin someone knew just in case I didn't have to do all that. haha

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I also couldn't find any reference to a 632 having a cab heater. So someone likely either adapted one from a different model or its a aftermarket heater unit. If you can post some pictures of where the heated air blows from and the controls then maybe someone can ID it.

OldMachinist said:

I also couldn't find any reference to a 632 having a cab heater. So someone likely either adapted one from a different model or its a aftermarket heater unit. If you can post some pictures of where the heated air blows from and the controls then maybe someone can ID it.

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The air comes out of between your legs between the 2 joy sticks...it has a panel there that I removed that has the heater duct attached to it. the duct takes a sharp turn and can't really see too much thats why I was thinkin about removing seat and bottom panel. Thanks

tyus4 said:

The air comes out of between your legs between the 2 joy sticks...it has a panel there that I removed that has the heater duct attached to it. the duct takes a sharp turn and can't really see too much thats why I was thinkin about removing seat and bottom panel. Thanks

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Taking out the seat pan and following the duct is about all you can do. When you find the blower I'd bet that you find some critter has built a nest there and has the fan locked up or has chewed on the wires.

OldMachinist said:

Taking out the seat pan and following the duct is about all you can do. When you find the blower I'd bet that you find some critter has built a nest there and has the fan locked up or has chewed on the wires.

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Thanks for the response. I will give it a shot

tyus4 said:

Thanks for the response. I will give it a shot

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I becha OM got it right

antfarmer2 said:

I becha OM got it right

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So I pulled the seat and seat panel out and followed the duct and found the heater. It is a aftermarket kit. I followed the power wire and noticed it was run through all the grunge, dirt, and oil on the bottom of the machine with 3 butt connectors through out it. So figured it was probably shorting out at one of the connectors. I ran a new wire from switch directly to heater and worked perfect. Just wanted to say thanks for the help.