Doosan 9/270 Operation And Maintenance Manual page 34

17/235 21/215
KEY
Air cylinder
1
2 Butterfly valve
3 Mini compressor
4 Unloader Solenoid
5 Relief valve
6 Orifice
SPEED AND PRESSURE REGULATION ADJUSTMENT
17/235 21/215
Normally, regulation requires no adjusting, but if correct adjustment
is lost, proceed as follows:
Refer to the diagram above.
With the unit stopped, disconnect ballast spring 'A' from the
butterfly lever. Loosen the two screws securing bracket 'C' to main
bracket 'J'.
Loosen screw 'D' and rotate the butterfly valve pivot shaft 'K' fully
clockwise until the valve is closed. Position lever 'L' approximately 10°
after vertical and tighten screw 'D'.
Keep the butterfly lever in the closed position and with the the air
cylinder fully contracted tighten the screws holding bracket 'C' to the
main bracket 'J'.
Regulation pressure transducer
7
8 Start/Run solenoid
9 Pressure regulator
10 Panel pressure guage
11 Manual blowdown valve
12 Temperature sensor
the ballast spring 'A'.
IMPORTANT: Ensure all components are aligned and move freely.
3,5-5,0 bar (50-70 p.s.i.).
anti-clockwise direction to open the butterfly valve.
direction to close butterfly valve.
control panel to commence normal regulation.
'F'. Turn the screw clockwise to increase pressure and anticlocwise to
reduce pressure.
9/270, 9/300, 12/235, 17/235, 21/215, 9/270HA, 9/300HA, 10/300HA, 12/235HA, 17/235HA, 21/215HA
MAINTENANCE
Pressure transducer
13
14 Minimum pressure valve
15 Separator tank
16 Auto blowdown valve
17 HR2 Airend
18 Air inlet
Allow the cylinder to return to its extended position and reconnect
Start engine: Note receiver pressure. Warm up pressure should be
To increase the warm up pressure, turn the air cylinder rod in an
To reduce warm up pressure, turn air cylinder rod in clockwise
When the engine is warmed up, press the service air switch on the
Set pressure by adjusting the screw 'E' on the pressure regulator
31