FIGURE 2-15
Pump and Motor Port Identification
System
Oil Flow From Pump Ports Oil Flow to Motor Ports
ABAB
Front Load Drum Raise Lower Raise Lower
Rear load Drum Raise Lower Raise Lower
Boom Hoist Raise Lower Lower Raise
Swing Right Left Right Left
Left Crawler Forward Reverse Forward Reverse
Right Crawler Forward Reverse Reverse Forward
Auxiliary Load Drum Raise Lower Raise Lower
AB
BAAB
B
A
B
A
B
A
Right
Crawler
Pump
Left
Crawler
Pump
Front of
Carbody
Swivel
Travel Circuit
Left
Crawler
Motor
Motor
Front Hoist Circuit
Right
Crawler
Motor
Pump
Motor
Motor
Swing Circuit
Pump
Pump
Boom Hoist Circuit
Pump
Aux. Drum Circuit
A1187
B
A
A
B
BABA