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#1
05-25-2012, 10:58 PM
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How can I add R12 to 1981 300SD?
Hi everyone,
Been a busy guy since returning from Colombia! Recently charged up the '94 GMC K2500 with a refrigerant kit and had an extra can and decided to charge up the 1981 300SD turbo diesel. My problem is I can't FIND it  . The truck was easy to find and I charged up the system by inverting the can and allowing the eco friendly coolant enter the a/c system. Older Mercedes' mention the a/c equipment to be in the passenger door! I am not johnny mechanic, but I will give it the old diesel try! I routinely change the oil & filter & fuel filter...also the power steering fluid and filter. If anyone has some pictures or a tutorial on how to charge a/c please help  .Great to be back in Great White North BC! 
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#2
05-25-2012, 11:57 PM
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Both ports wille be obvious if you open the hood and look from the front.
__________________
85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.
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#3
05-26-2012, 01:28 AM
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if it's the same as my 82, the suction port you need to connect your can to, is in front of the false firewall, in front of the brake master cylinder... large line nut connection right inside the engine compartment.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!!  1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#4
05-26-2012, 01:29 AM
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However, the 94 GMC should be 134, so you may not have 12, you may have 134, and the fittings are different with 12.
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#5
05-26-2012, 12:46 PM
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r12 for truck and benz
The A/C recharge kit I bought is "Red Tek 12a" that replaces R-134a (truck) and R12 substitutes. I will look around the master cylinder as pointed out for A/C line
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#6
05-26-2012, 04:32 PM
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Thanks for the description, I found it. Had to use the adapter piece in the kit for "tractors". Blows cool air! Is quiet on the "ec" setting in the climate control cluster but sounds rickety on the up/low arrows when they are depressed. The rickety sound is coming from the front of the vehicle, but hard to pinpoint where. perhaps some bearings are dry...
Thanks for everyone's help, now I can keep my girl cool  PicPaste - DSC00487-3xgzB9ef.JPG
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#7
05-26-2012, 08:18 PM
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... you realize you just installed propane in the car right?
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#8
05-26-2012, 10:23 PM
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Will that do any damage? on Ec it is quiet and produces cold. Do i have to buy a special type?
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#10
05-26-2012, 10:52 PM
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Quote:
__________________
have no worries.....President Obama swears "If you like your gun, you can keep it
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