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Freightliner recharge

westtexus on Tue July 08, 2008 9:11 PM User is offline

Year: 2000
Make: freightliner
Refrigerant Type: R134A
Country of Origin: United States

A friend of mine has a 2000 Freightliner, and the refrigerant has leaked out , the leak has been found and repaired. What I would like to know is if anyone can tell me at what rpm to recharge, and what pressures are to be. I don't know what engine size, but it is a diesel.

Chick on Tue July 08, 2008 9:16 PM User is offlineView users profile

Really not much different than a car, should be a tag under the hood, those that I have worked on have it on the radiator support. Charge the factory amount back into a good vacuum. If you can't find the tag, call a dealer, some have two evaps, some just one. Last one I did had a single unit and took 5 pounds, pressures will be hard to charge by, if I remember the fan locks up and pressures drop fast, so it's best to fill by factory amount and use the pressures to check the operation. But just like a car, when properly charged, the suction line will be cold right back to the compressor..Hope this helps until someone more familiar with trucks comes along...

Email: Chick


Freedoms just another word for nothing left to lose

westtexus on Tue July 08, 2008 9:20 PM User is offline

Great, thanks for the info. most times on this site it is instructed to charge a/c at 1500 rpm. is there a special reason for this?

chris142 on Tue July 08, 2008 9:40 PM User is offline

1500 rpm is a little high on that thing. It should have a switch to turn the engine cooling fan on manually. Turn that on. I'd charge it around 1100-1200 rpm.

All trucks are different but most Freightliners take 3.63 lbs with a sleeper and 1.8-2.0 W/O a sleeper.

There is a switch on the high side that should turn the engine cooling fan on when the high side gets near 300 psi.

So when your done charging it turn the switch on the dash off and see if the fan comes on around 300psi automatically.

Those things are very noisey! That engine cooling fan is about 3 ft in diameter and absolutly screams!

hdtrvlr on Wed July 09, 2008 10:55 AM User is offline

A 2000 Freightliner FLD without sleeper a/c unit takes 2.14 lbs of r134a.
With my machine it charges on the highside with the engine off.
Then set a/c to max with fan on high, start and let idle till the
engine fan cycles at least four times. If it is a "classic" model
they use 3lbs 7 oz. If you are using guages only then charge at 1000 rpm.

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