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#1
09-23-2012, 06:55 PM
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New project - Repairing John Deere 4230 a/c system
System has been being kept plugging along with freeze 12 for a few years and now needs to be properly repaired. It was originally an r12 system and reading up on it sounds like it is typically a succesful conversion to r134. The evaporator is pretty nasty in the unit so it will be an all day job to make it right. Looks pretty straight forward.
Reading up on it seems that one of the weak areas of the design is the hard tube lines going up in the left rear ROPS support. Fix is to just go back with a/c hoses.
__________________
Jim 
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#2
09-23-2012, 08:51 PM
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Quote:
Make sure you give it a good clean before you start work on it. Will have years of dust built up every where.
__________________
Grumpy Old Diesel Owners Club group I no longer question authority, I annoy authority. More effect, less effort....  1967 230-6 auto parts car. rust bucket. 1980 300D now parts car 800k miles 1984 300D 500k miles  1987 250td 160k miles English import  2001 jeep turbo diesel 130k miles  1998 jeep tdi ~ followed me home. Needs a turbo. 1968 Ford F750 truck. 6-354 diesel conversion. Other toys ~J.D.,Cat & GM ~ mainly earth moving
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#3
09-23-2012, 08:57 PM
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I should have taken a pic of the evap when I was over there today taking a look at it. I cound not even tell it had fins till I knocked a couple layers of dirt and grime off of it.
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Jim
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#4
09-24-2012, 01:16 AM
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Quote:
Its going to get messy in the cabin when you hit the evap with some air pressure to get it clean ! My scraper & grader drivers clean the cabin filter when ever they blow the air cleaner out. They have worked out its them that suffers if the aircon dont work !
__________________
Grumpy Old Diesel Owners Club group I no longer question authority, I annoy authority. More effect, less effort.... 1967 230-6 auto parts car. rust bucket. 1980 300D now parts car 800k miles 1984 300D 500k miles 1987 250td 160k miles English import 2001 jeep turbo diesel 130k miles 1998 jeep tdi ~ followed me home. Needs a turbo. 1968 Ford F750 truck. 6-354 diesel conversion. Other toys ~J.D.,Cat & GM ~ mainly earth moving
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