SEAL 3134421 - Caterpillar

Schematic
Illustration 1 g00885507
(1) autolube tank
(2) Air tank check valves
(3) Primary air tank
(4) Drain valves
(5) Air relief valve for primary air tank
(6) Junction box
(7) Inversion valve for attachment shutters
(8) Solenoid valve for attachment shutters
(9) Junction block
(7) Starter relay valve
(8) Air starting motor
(9) Air compressor governor
(10) Air compressor
(11) Air dryers with air relief valves
(12) Starter solenoid valve
(13) Wastegate
(14) Solenoid valve for maximum pressure
(15) Pressure regulator
(16) Drain valve
(17) Brake air relay valve
(18) Brake air relay valve for the Automatic Retarder Control (ARC)
(19) Pressure protection valve for the brake air system
(20) External air supply
(21) Front brake cooling diverter valve
(22) Parking and secondary brake valve
(23) Attachment cleanout hose
(24) Attachment air suspension buddy seat
(25) Air suspension seat
(26) Air horn solenoid
(27) Solenoid valve for autolube
(28) Air system pressure protection valve
(29) This is the stop lights pressure switch. This pressure switch is normally open. This pressure switch is closed by air pressure when the service brakes, the retarder, or the Automatic Retarder Control (ARC) are applied. When this pressure switch is closed, this pressure switch activates the stop lights.
(30) This is the pressure switch for the service brake and the retarder. This pressure switch is normally closed. This pressure switch is opened by air pressure when the service brakes, the retarder, or the Automatic Retarder Control (ARC) are applied. When this pressure switch is open, the pressure switch signals the Power Train ECM in order to allow the transmission to perform rapid shifts. The Power Train ECM also indicates that higher engine rpm is needed for upshifts or for downshifts of the transmission when this pressure switch is open.
(31) This is the secondary brake and parking brake pressure switch. This pressure switch is normally open. The pressure switch is closed by air pressure when the parking brakes or secondary brakes are released. When this pressure switch is open, this pressure switch signals the Power Train Electronic Control Module (Power Train ECM) to allow rapid shifts.
(32) This is the brake air pressure sensor. The brake air pressure sensor monitors brake air pressure. The operator will be alerted to a condition of low air pressure.
(33) Double check valves
(34) Service brake air control valve
(35) Retarder air control valve
(36) Parking brake reset valve
(37) Front brake air/hydraulic cylinders
(38) Rear brake air/hydraulic cylinders
(39) This is the Automatic Retarder Control pressure switch. This pressure switch is normally closed. This pressure switch is opened by air pressure in order to indicate that the Automatic Retarder Control (ARC) is operating. The pressure switch verifies that air pressure is being provided through the Automatic Retarder Control valve.
(40) Automatic Retarder Control (ARC) valve
(41) Secondary brake air control valve
(42) Parking brake air control valve
(43) Air horn
(44) This is the manual retarder pressure switch. This pressure switch is normally open. This pressure switch is closed when the retarder air control valve is applied. This switch operates the indicator in the cab.
(45) Secondary brake inverter valve
(46) Secondary air tank
(47) Cab wall Location Of Components
Illustration 2 g00885581
Compartment in the front of the cab
(33) Double check valve
(34) Service brake air control valve
(39) Automatic Retarder