Change from r12 to r134 by MB factory for 124 chassis - Page 2 - PeachParts Mercedes-Benz Forum

ds190 · #16 06-24-2011, 10:58 PM

Quote:

Originally Posted by compress ignite

1.Measure your old Condenser(Record the measurements!)
2.Select the New Parallel Flow Condenser that will FIT.
[Your Due Diligence in comparing the New Parallel Flow Condenser's Capacity
to the Old Condenser's Capacity will tell you if you're "Chasing the Dragon"]
3.Take Both OLD and New Condensers (AND the Hoses to be replaced)
to the Hydraulic Shop.So they can "SEE" the extra amount of Hose needed and
the Fittings to "Make Up" the New configuration.
(They'll use your old fittings and New "Barrier" type hose to make new ones.)

You'll have to McGuiver the fittings and Rubber Bumpers to secure the New
Condenser into the Old One's Slot.

So, you have not installed a parallel flow condenser in your 124, is that right?

Thanks for the link to ackits.

sptt · #17 06-25-2011, 12:00 AM

Just had my fittings and o-rings replaced in my w124 300E '91 to retro from R12 to 134. I had a leaking high pressure hose and now it blows ice cold. No new drier or parallel flow condensor added. I'll post back if and when it starts going bad.

duxthe1 · #18 06-25-2011, 01:44 PM

I have to refute the claim that R134A runs higher pressure. In fact there is a R134A specific high pressure switch that cuts the fans on about 50PSI lower than the R12 switch does. 250 v/s 300 You can tell them apart by color, the green switch is for R134A and the red one is R12. A proper conversion will require swapping in the lower rated switch.

compress ignite · #19 06-26-2011, 12:09 AM

ds190,

The ONLY thing left in the HVAC "Cooling" system that made the Original trip
from Sindelfingen VIA Hamburg on the Chassis in 1990 is the Compressor.
[It (The Compressor)does have New Seals,Inside AND Out.]

"It's ALL About Condenser Capacity"