8.4.2. Installation of connecting details

Connection by bolts and nuts

Fig. 8.56. Connection of the pipeline of the air conditioning system



You apply on all fasteners compressor oil for simplification of their inhaling sufficient for ensuring tightness of connection.
You make an inhaling for prevention of twisting of pipelines two keys.
Tighten threaded connections the specified moments.

Flange connections with the directing pin
Check existence of a sealing ring, be convinced of lack of its damages and apply on it compressor oil.

Fig. 8.57. Scheme of installation of flange connections


Insert a tube, as shown in the figure 8.57, and tighten a nut a hand.

Compression oil
Oil for compressor lubricant during its work circulates in system. In all cases when replacement of details of system is made or there is a leakage of a large amount of coolant, add oil for restoration of its initial quantity.
Single filling with oil: 140–160 g.

Treatment of oil
Do not allow hit in oil of moisture, dust, metal particles, etc.
Do not mix oil of different brands.
At long impact of air on oil moisture content increases in it. After gas station and a doliv of oil at once densely close capacity.

Filling of the compressor with oil
Before check of level of oil and share let's the engine work idling 20–30 min., having installed temperature switch in the situation corresponding to giving in salon of most cooled air, and the fan switch – the maximum speed of rotation, then fill in oil in the compressor.

Check and restoration of level of compressor oil
For a doliv of oil at the working compressor previously check oil level.
Make filling of the compressor oil, stop the engine, merge coolant and remove the compressor from the car.
Merge oil via the drain union of system.

NOTE
The discharge of oil from the cold compressor is complicated. Before discharge of oil warm up the compressor approximately to 40–50 °C.

Define amount of the merged oil. If it less than 70 cm3, means there is a small leak of oil. Check tightness of all connections of system, eliminate leak or if necessary replace faulty details.
Check oil for existence of pollution and restore its level to norm, as shown below.


Having added oils when replacing details
When replacing details of system add the following amount of oil in the replaced details.


Installation of the control moments

Fig. 8.58. Accession of filling hoses



Close both gates of an adapter of manometers.

ATTENTION
At installation of control manometers observe security measures.

Attach filling hoses to adapter unions. Attach a hose of low pressure to the filling union of low pressure, and a hose of high pressure – to the filling union of high pressure. Tighten nuts of unions of hoses manually.

NOTE
Fill system with coolant, previously having uncovered the engine and an air-intaking branch pipe.

Coolant discharge
Connect a set of control manometers to system.
Spread out a towel under the open end of the central hose.
Merge coolant, slowly opening the gate of the line of high pressure.

NOTE
At too bystry discharge of coolant there can be a discharge of compressor oil from system.

Check whether there are no oil spots on a towel. If is, slightly cover the gate.
When indications of the manometer fall lower than 3,5 kgfs/cm2, slowly open the gate of the line of low pressure.
Slowly open gates of lines of high and low pressure until manometers do not show 0 kgfs/cm2.


Fig. 8.59. The scheme of installations at coolant plum