Turbo Diesel Registry
Issue link: http://read.uberflip.com/i/594528
12 www.turbodieselregister.com TDR 90 REFRIGERANT LEAK ON FIREWALL The air conditioner in my '93 Turbo Diesel W250 isn't as cold as it used to be. Checking for leaks, I noticed some refrigeration oil on the aluminum block on the firewall where the refrigeration lines connect. There appears to be one bolt that holds the two halves together. Do O-rings seal the connection? Is this a job that I can do myself or is it better left to a professional air conditioner repair shop? I have access to R12 refrigerant and it will not be a problem recharging the system after the repair. If I remove that plate, I imagine I'll get a face full of oil and freon R12? Should the system be evacuated and freon R12 reclaimed before I attempt any repairs? tobaccogrower, CT The aluminum block is the expansion valve. It is required to evacuate and reclaim the freon R12 before opening the air conditioning system to make repairs. Bob4x4, Riverside, CA The aluminum block is the expansion valve, also known as a "H" valve. This regulates the amount of liquid freon flowing into the evaporator, which is located in the heater box. On either side of the expansion valve is a seal/gasket. Never open the air conditioning system if you suspect it to still have some pressure in it. Always have the system evacuated and the refrigerant reclaimed. If the system is empty, it is easier. You will need two replacement gaskets, and if my memory is correct, there are two O-rings for sealing the cab side of the H valve. After removing the bolt, the front line will come off. Remove the gasket. There will be two bolts in the H valve holding it to the evaporator hose, remove those, and the second gasket is there. While the H valve is removed, clean it making sure the metering device is not plugged. Once the H valve is clean, clean the oil from the hose surfaces and H valve surfaces. Using the new gaskets, reassemble. Before charging the system, install a new filter-dryer. The filter-dryer must be replaced any time the system is opened and exposed to the atmosphere. RSchwarzli, ON FUEL GAUGE SENDER I am searching for a replacement fuel gauge sender for the fuel tank on my '92 Turbo Diesel W250. Does anyone know of a source for a direct replacement? JDancoe Online Mopar parts supplier, moparpartsamerica.com, lists the fuel sender, part number 52017992 for $54. dodgenstein, Hamilton, MO 2016 TDR CALENDAR CONTEST PHOTOS John Innocenti's entry. Andrew Villablanca's entry. Coverage of the '89 through '93 Model Trucks. Web Site Correspondence Edited by Bill Stockard.