Bobcat T300 Air Conditioner

OldMachinist said:

Bobcat does sell the clutch separate from the compressor but it takes 2 different pullers to get the clutch apart and off and there's not enough room to do that with compressor installed.

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Kent300 said:

Thanks Old Machinist. From what I've told you, is my thinking correct? Should this clutch be pulling more that 25 amps when it's isolated from the machine and energized with 12 volts? Also, the a/c works fine up until it blows the fuse. Would you go to the trouble to just change the a/c clutch or replace everything while it's out of the machine. 465 total hours since 2005. Ken

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Kent300 said:

Just talked to Bobcat Parts in Marietta, GA. They are telling me I can't get the clutch separate from the compressor. Do you have a source?

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OldMachinist said:

I looked at the Bobcat's online parts website and it showed a part number for a clutch. I didn't know your machine serial number so I only looked at the newest version of the T300.
Bobcat parts
The service manual doesn't say how many amps the clutch should draw but it does give a resistance value of 3-5 ohms.

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OldMachinist said:

I just went back and looked at every serial number version of the T300 and they all show the same number for the clutch. 6679145

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Kent300 said:

Well, you are the man! I've been on their site since your last post and I can't find a thing related to the a/c on my t300. What's the trick to looking up this part so I'll know the next time? Again, thank you very much!

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OldMachinist said:

Go to the accessories and options section of the part lists for your serial number then type "clutch" in the search box and click GO. It should bring up the parts list for the A/C and highlight the clutch on the diagram.

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Tazza said:

With the resistance OM has provided, it should draw no more than 4 amps.
Are the hoses long enough to remove the compressor and pull the pully off? Hopefully not needing to dump the gas

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Kent300 said:

I'm going to do a little checking this morning. My fluke 87 has an eleven amp fuse in the amp circuit and it blew that fuse so probably pulling more than that. I hooked the clutch up to a small 12v battery and it immediately blew the 25 amp fuse I had installed in line. Sure would save a lot of effort if I could get the clutch off w/o cracking the system. I know the service manual shows using pullers to remove the clutch but I've taken other clutches off w/o using a puller. Besides coming in from the other side with a long extension, is there a good way to get to the bottom bolt on the compressor? Very tight place to work! Suggestions are welcomed. Thanks for your input.

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antfarmer2 said:

Can't see it from here but crows feet get in a lot of tiight places

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Kent300 said:

A/C coil, 27 amps! I was able to remove the compressor without taking off the lines. Hopefully, this will be an easy fix as just the coil inside the clutch is available. Thanks again for everyone's input.

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antfarmer2 said:

Good job!!!!!!!

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Kent300 said:

OK, here's where I am. A/C working good. Replaced the coil on the clutch and all was well for a while. When it quit (it didn't blow the fuse this time) I was able to find the problem-the connector that connects the coil to the machine wiring must have a short. I can wiggle and torque it and the clutch operates. I can easily fix this problem by just wiring direct with wire nuts but the schematic shows a diode in the clutch circuit. Where is the diode? This diode no doubt keeps the coil from discharging back into the machine wiring when it is switched off. I don't want to lose that protection. Does anyone know where the diode is? If it's not in this Male/Female connector I won't worry about it but I'd like to know for sure. I have the service manual that shows the diode but not where it's located.

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siduramaxde said:

Wire nuts belong in houses...If I were you I would solder any electrical connections you make.

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