B-8 Hydraulic Pilot Control Valve (Swing, Elevating, Telescoping, Winch) .................................... 26 1.
Structure ................................................. 26 1.1
Hydraulic symbols .................................... 27
1.2
Swing valve assy...................................... 28
1.3
Supply, drain section ................................ 29
1.4
Elevating valve assy................................. 30
1.5
Telescoping selection assy....................... 31
1.6
Telescoping valve assy............................. 32
1.7
Main winch valve assy.............................. 33
1.8
Auxiliary winch valve assy........................ 34
1.9
Supply section assy.................................. 35
1.10 Relief valve assy (RF2, RF3) ................... 35 1.11 Relief valve (for winch) (RF5)................... 36 1.12 Relief valve assy (for elevation) (RF4) ..... 36 1.13 Relief valve assy (RF1) ............................ 37 1.14 Slow return valve ...................................... 37
B-9 Hydraulic Valve (Pilot Pressure)... 38 1.
Structure ................................................. 38 1.1
General view (external view) .................... 38
1.2
General view (section view) ..................... 39
1.3
Supply section assy.................................. 40
1.4
Unload valve assy .................................... 41
1.5
Pilot valve assy......................................... 42
1.6
Pressure reducing valve........................... 43
B-10 Check Valve (Gauge Isolator) ....... 44 1.
Structure ................................................. 44
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