AIR CLEANER 3903135 - Caterpillar

Illustration 1 g03652495
Signal Resolver Network
The illustration includes the resolver for the ripper and the resolver for the PAT blade.
(1) Float Boost Signal
(2) Passage from Ripper Lift Control Valve
(3) Passage from Bulldozer Angle Control Valve
(4) Passage from Bulldozer Tilt Control Valve
(5) Passage from Bulldozer Lift Control Valve
(6) Signal to Pump Compensator The resolver network consists of a resolver (ball check valve) in each implement control valve. Each resolver compares the pressure signal from the previous control valve and the pressure signal from the current control valve. The resolver ball shifts in order to allow the higher signal to flow to the next resolver.For example, Illustration 2 shows the resolver network when the ripper lift control valve is activated. The resolver in the ripper lift control valve compares float boost signal (1) to signal (2) from the ripper lift control valve. Since the ripper lift control valve is activated, signal (2) is higher. The resolver ball shifts and signal (2) is sent to the next resolver. The next resolver in the bulldozer angle control valve compares the signal from the ripper lift control valve to signal (3) from the bulldozer angle control valve. Since the bulldozer angle control valve is not activated, the signal from the resolver in the ripper lift control valve is higher. The ball shifts in order to send the higher signal to the next resolver in the blade tilt control valve (4). The signal from each of the implement control valves is compared in this way.The highest resolved signal from the implement control valves goes through line (6) to the compensator valve on the implement pump. The signal instructs the pump to vary output in order to meet the highest load requirement. Also, the pump compensator valve adds margin pressure to the load requirement.Note: The resolver network does not add various loads together. Instead, the single highest resolved load governs the pump output.When the blade lift control valve is in the FLOAT position or LOWER position or AccuGrade is enabled, pilot oil enters the end of the resolver network as float boost signal (1). When the blade lift control valve is in FLOAT and none