SHIM-WORM 7D4267 - Caterpillar

Schematic
Illustration 1 g02018073
Air system
(1) Compressor
(2) Unloader valve
(3) External air supply
(4) Air dryers
(5) Governor assembly
(6) Air reservoir 182 L (48 US gal)
(7) Switch module for the air dryer
(8) Pressure protection valve
(9) Drain valve
(10) Air start motor
(11) Relay valve for the air start
(12) Air start solenoid valve
(13) Air system pressure sensor
(14) Air horn
(15) Air horn solenoid valve
(16) Air reservoir 500 L (132 US gal)
(17) Solenoid valve for the autolube
(18) Pump for the autolube
(19) Air regulator
(20) Relief valve Location Of Components
Illustration 2 g02018095
(1) Compressor
(2) Unloader valve
(5) Governor assembly
(14) Air horn
(15) Air horn solenoid valve
(17) Solenoid valve for the autolube
(18) Pump for the autolube
(19) Air regulator
Illustration 3 g02020393
Air system
(4) Air dryers
(6) Air reservoir 182 L (48 US gal)
(7) Switch module for the air dryer
(8) Pressure protection valve
(9) Drain valve
(10) Air start motor
(11) Relay valve for the air start
(12) Air start solenoid valve
(13) Air system pressure sensor
(16) Air reservoir 500 L (132 US gal)
(20) Relief valve Operation
The air system for the 797F controls the following components:
Air start motor
Autolube system
Air hornAir compressor (1) is driven by the engine and air compressor (1) provides air flow to the rest of the air system. Air flows from air compressor (1) to air dryers (4). Air dryers (4) remove contaminants and moisture from the air system.Air then flows from air dryers (4) to switching module (7), pressure protection valve (8), and the two air reservoirs. Air continues to flow from the two air reservoirs to solenoid valve (12) for the air start, solenoid valve (15) for the air horn, solenoid valve (17) for the automatic lubrication, and pressure sensor (13).Pressure sensor (13) sends a signal to the chassis ECM that indicates the air system pressure. As needed, solenoid valve (12) directs air to air start motor (10). As needed, solenoid valve (15) directs air to the air horn. As needed, solenoid valve (17) directs air to the automatic lubrication system.