84-86 Ford SVO Mustang AC Installation Guide

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Victor Banks
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1 84-86 Ford SVO Mustang AC Installation Guide This installation guide is for the AC installation kit from Late Model Restoration. The Vendor is Hose Wizards that manufactures this great kit that provides a great conversion to AC 134a. This document is meant as a reference only and I assume no liability or warranty for this guide. (Sorry for the legal stuff). However, I thought it might be handy for those looking for a great alternative to running an R12 or is missing their air conditioning. I hope you find this useful. Thanks Rich

2 84-86 Ford SVO Mustang AC Installation Guide

Condenser Installation The first step was to install

Take the top radiator brackets off and tilt the

3 Condenser Installation The first step was to install the AC Condenser. I was able to do this without draining the cooling system. Take the top radiator brackets off and tilt the radiator back. If you still have your old condenser installed. Take the brackets off and remove it. Install the new condenser on the old mounts

A great part of this install kit is that it includes EVERYTHING to install the AC in here EXCEPT the Receiver/Dryer (Accumulator)

4 Compressor Brackets Locate the install image included in the install kit. This will give you a good exploded assembly diagram of the brackets. A great part of this install kit is that it includes EVERYTHING to install the AC in here EXCEPT the Receiver/Dryer (Accumulator) bracket. Many times as SVO s change hands the brackets are lost. No worries here! The main compressor bracket is very straight forward as shown in the diagram. The upper bracket the supplier indicated it was not needed. To use it will require modification.

Compressor Brackets Here s a picture showing the main

However, there is a contact of the lower radiator hose.

However, you have a greater risk of a sharp contact edge

I m going to put a protective sleeve instead since the

5 Compressor Brackets Here s a picture showing the main bracket installed first. It s very straight forward. However, there is a contact of the lower radiator hose. You have choice to try and shorten the hose. However, you have a greater risk of a sharp contact edge cutting the hose. I m going to put a protective sleeve instead since the contact is flat with no cutting edges. It s not a severe contact so I think it will be ok since everything moves when the engine torques.

6 Compressor Brackets Now comes the secondary bracket. When the bracket was manufactured the material is a little too wide. This will not clear the thermostat housing with the clearance needed to connect at both points. The next page will show what I did.

7 Compressor Brackets Here you can see the small relief I ground off to allow the bracket to fit. Again, I was told it wasn t needed. But, decided to go ahead and modify and install. I ground off approximately 3/16 of an inch.

8 Compressor Brackets As you can see there is now enough clearance for the bracket to bolt up.

One of the many things about this kit that impressed me was it had

9 Compressor Installation The compressor mounting is straight forward with the diagram below. One of the many things about this kit that impressed me was it had everything to install. The original brackets are not used. This where the tension idler will be installed later

10 Coolant Line Installation The first step I did was to use a little amount of PAG 100 oil to lubricate the nitrile O rings to allow easier assembly. The lines going to the condenser should Click into place. Make sure they are secure or they will blow out.

11 Coolant Line Installation On the back of the compressor there is a fitting that needs to be installed as shown to install the lines to it. You will need to remove the sealing plate and bolt and discard. Then use the Allen Head Bolt to secure the fitting.

using the original bracket that came with

If you are re-using your evaporator it is

12 Coolant Line Installation Install the Receiver/Drier also called an Accumulator using the original bracket that came with the car or you could fabricate your own. You can also install the liquid line to the evaporator also. Important tip! If you are re-using your evaporator it is HIGHLY RECCOMENDED you flush it to clean and remove any debris.

13 Coolant Line Installation This image shows the over all line install. The last fitting will be on the liquid line with the Orifice Tube filter.

Pulley and Belt Routing IMPORTANT!!! When installing the idler and belt it s important to note this kit will work on 84 86 Mustang SVO s.

The belt angle on the water pump 3 groove set up will NOT grip the new compressor tight enough to turn when the clutch engages causing squealing and belt destruction.

14 Pulley and Belt Routing IMPORTANT!!! When installing the idler and belt it s important to note this kit will work on Mustang SVO s. However, the kit was designed to work using the 3 Groove Crank Pulley that was on 84 to 85 ½ SVO Mustang. 85 ½ - 86 SVO Mustangs have a 3 Groove Water Pump Pulley. The belt angle on the water pump 3 groove set up will NOT grip the new compressor tight enough to turn when the clutch engages causing squealing and belt destruction. I tested every way possible and had to switch to a 3 Groove Crank Pulley like the earlier years. The good news is this pulley is fairly easy to find on online auctions new and used. Even a good pick and pull should have a 2.3 lying around. An NOS pulley online is about $65 NEW, $40 Used, and even a pick and pull around $15 to $20. CORRECT BELT ROUTING ON THE 3 GROOVE CRANK PULLEY LIKE 84 to 85 ½. WILL NOT WORK ON THE WATER PUMP PULLEY 85 ½ to 86!

15 Pulley and Belt Routing I ve also noticed I don t feel any bump when the AC clutch engages. It s nice and smooth and silent.

16 Final Compressor Wiring The SVO s original compressor wiring has a 2 wire connector. The wire with the stripe should be the hot wire. The black is a ground. Since the compressor is self grounded to the block this wire is not needed. You can tape or heat shrink it to protect it. Cut off the connector and discard it. The Hot striped wire will need to be lengthened to reach the trianary switch (This switch is to protect the compressor if the refrigerant pressure drops too low) in the liquid line. I recommend soldering and heat shrink tubing. Then add a female blade type connector and plug into one side of the switch. Take the green wire from the compressor and add a female blade connector and hook to the other side. You will notice a Black Solid wire coming from the compressor. This wire has been clipped and sealed inside the zip flex covering. Nothing is needed. The SVO comes standard with an electric fan. Whether you are running a stock fan or aftermarket make sure the fan can turn at 4200 CFM. Also, the factory harness has a trianary switch that will turn the fan on automatically when the AC calls for it. For aftermarket fans and custom setups contact your manufacturer.

17 Final Compressor Wiring This is an image showing the Trianary Pressure Switch

18 CAUTION AND WARNINGS (These are from the vendor in the documentation) If you are running a Thicker Radiator IE: a 3 row etc.. The vendor says this can cause the AC System to Blow Up due to climbing head pressures. In addition, if you are running a clutch fan setup and the clutch fails this will also cause a catastrophic failure. Make sure High Side Pressure does NOT go over 200lbs with a MAX of 220lbs anything over these, the AC System will not blow cold air. As stated earlier this system is meant replace a STOCK Factory configuration. Anything other than that will VOID the system warranty!

19 Charging and Tuning the AC System (This is from the vendor documentation) It is highly recommended you have a professional shop do the charging and tuning or you are skilled with AC systems. Make sure you evacuate the system to remove any moisture with a vacuum pump. The system requires 24oz of 134a Refrigerant. The cycle switch may need to be adjusted. Look into the top of the Accumulator with the plug out. You will see a flat blade adjustment screw. Turning the screw counter clockwise will make the compressor stay engaged longer. Clockwise will make it disengage sooner. DO NOT adjust more than ONE BLADE WIDTH at a time! This process takes time to get right so be patient. The compressor must cycle 6 to 8 times between adjustments. Make sure when you are adjusting you are set on Max Air and fan speed 2. You should be seeing 38degrees at idle.

20 Vendor Contact Information Hose Wizards 1050 Cooper Road Suite B Grayson, Georgia

A/C compressors: extending their service life

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