Hydraulic system 5.12 Travel drive Auto 2-speed (starting serial no. AC 02957) The travel drive has an “automatic powershift” gearbox. The travel drive is basically in 2nd speed if the switch for 2nd speed range is turned on (high speed). 1st speed is automatically engaged if more power is required.
R/G
Hydraulic motor on left 7
8 3 9
5
3 6
2
1
4
4 1 2
Ref.
Description
1
Drive port (and record swivel joint 4a) forward hydraulic motor (left) Drive port (and record swivel joint 7a) forward hydraulic motor (right)
2
Drive port (and record swivel joint 6a) reverse hydraulic motor (left) Drive port (and record swivel joint 5a) reverse hydraulic motor (right)
5-34
3
2nd speed range port (and record swivel joint 1a)
4
Return oil port (and record swivel joint 8a)
5
5/2 directional valve (2nd speed range)
6
Brake bleed valve
7
Brake cylinder
8
Pressure limiting valve (4a)
9
Pressure limiting valve (6a)
918170/AP0905
