GF83.55-D-4005H Refrigerant Compressor Magnetic Clutch For Roof Air Conditioning, Component Description

GF83.55-D-4005H Refrigerant Compressor Magnetic Clutch For Roof Air Conditioning, Component Description

- with CODE (H08) High-performance air conditioning







Shown on engine OM642
A9/7 2nd refrigerant compressor







Shown on engine OM646
A9/7 2nd refrigerant compressor







Shown on engine M272
A9/7 2nd refrigerant compressor

Location
The 2nd refrigerant compressor magnetic clutch (A9/7y1) is located directly in the belt pulley of the 2nd refrigerant compressor with all engine variants.

Task
The 2nd refrigerant compressor magnetic clutch establishes the frictional connection between the spring plate and the belt pulley.







1 Refrigerant compressor shaft
10 Belt pulley
12 Fuse
13 Ball bearing
15 Solenoid
16 Pressure plate
17 Rubber insert
18 Spline
A9/7y1 2nd refrigerant compressor magnetic clutch

The belt pulley mounted on the refrigerant compressor shaft is driven by the poly-V belt. It turns on the ball bearing around the solenoid attached to the housing of the 2nd refrigerant compressor.
The pressure plate with the rubber insert is connected over a spline to the refrigerant compressor shaft and it can be shifted axially.
To start up the 2nd refrigerant compressor, the solenoid is energized.
The magnetic force pulls the pressure plate against the rubber insert and holds it in position. The frictional connection between the engine and the 2nd refrigerant compressor is thereby established.
If the solenoid is no longer energized, the pressure plate is pushed back by the rubber insert into its rest position and the frictional connection is interrupted. Switching off of the 2nd refrigerant compressor in the event of a mechanical defect is therefore ensured.

Safety circuit of the 2nd refrigerant compressor
To prevent the poly-V belt from slipping off in the event of a mechanical defect of the 2nd refrigerant compressor, the magnetic clutch of the 2nd refrigerant compressor automatically disengages.
In the event of a mechanical defect, the 2nd refrigerant compressor turns with greater difficulty or even locks completely. The heat generated at the friction surface causes the fuse in the solenoid to blow. The current supply of the solenoid is interrupted and the frictional connection is released.