Compressor repair

Having read this chapter, you will learn how on the basis of carried out below order about disassembly and assembly of the compressor to make his fine and major overhaul. The information concerning a principle of work of the compressor and its general device is contained in 1-st and 2-nd parts of this book.

The automobiles equipped with the compressor may differ an arrangement of arms of fastening, the device of a drive, pulleys, connections and in refueling capacity of the system of air-conditioning. Nevertheless, the basic operations on repair of compressors remain common.

At repair of the compressor it is necessary to watch that the dirt has not got on external surfaces and in internal cavities. For qualitative repair it is necessary to observe cleanliness on a workplace and to use clean tools. Before serving the compressor on the automobile or to dismantling it for repair in stationary conditions, it is necessary carefully to clean the compressor and pipeline nipple connections outside.

After disassembly of a detail of the compressor it should be preserved in purity. Before assembly of a detail it is necessary to be washed out in trichlorethane, ligroin, standard solvent, kerosene or similar solvents and to dry up with compressed dry air. For rubbing details it is possible to use only the fabrics which are not leaving fibres and pile.

1 – back cover of the compressor
2 – entrance aperture (is not shown)
3 – lining of a back cover
4 – distributive plate
5 – valve plate with blade valves
6 – coil of coupling electromagnet

7 – pulley (is not shown)
8 – driven coupling disk
9 – pulley bearing
10 – fastening feather of a nave on a shaft
11 – nut
12 – lock ring of condensation
13 – border condensation
14 – sealing ring
15 – crack case
16 – compressor control valve
17 – reducing valve
18 – lock ring of the bearing
19 – pulley with driven disk of coupling
20 – coupling bolt
21 – lining
22 – sealing ring between crack case and the block of cylinders
23 – block of cylinders with shaft and an inclined washer in gathering
24 – sealing ring between a back cover and the block of cylinders
25 – thrust cartridge
26 – ring of the persistent bearing
27 – persistent bearing
28 – switches of the fan and low pressure
29 – fuse of a drain aperture
30 – featherway
31 – shaft
32 – sealing ring of reducing valve
33 – sealing rings of switches of the fan and low pressure
34 – sealing ring of the control valve
35 – lock ring

The description of operations given below on repair of the compressor is designed for work with the unit removed from the automobile in conditions of workshop, except for the separate specified cases.

The sequence of technological operations takes into account an opportunity of convenient access to separate details of the compressor.

After dismantle of the compressor from the automobile it is necessary to completely merge the oil which has stayed in it to measure and write down volume of merged oil. In the subsequent this amount of oil is replace with fresh one: marks 525 if the system of conditioning is charged with refrigerant R-12, marks PAG if the system works on refrigerant R-134а.

Organization of compressor V-5

Attention: It is necessary to turn out a drain fuse - A from the compressor case for full oil drain.

On automobiles compressors with two various variants of back covers may be installed. One variant of performance of a back cover has no the built - in switches of pressure. In this case they are installed in highways. The second variant of a cover is similar used on the last models except that in some cases the switch of low pressure is replaced with the switch of the cooling fan. Thus, the low pressure switch also is built in highways of the system.