User manual

Preventive Maintenance
5-10 ProMaster 2500 User Manual
When the beam lowers, it is driven down by low pressure air routed
through hole 12. This air enters the hi/low valve assembly through hole
19 and pushes the ball bearing up, sealing off hole 21 and creating a path
to hole 20. From hole 20, the low pressure air is forced to hole 18, pushing
down on the fixed piston and lowering the beam. This air is vented
through exhaust holes on the bottom of the beam assembly.
Figure 5-2
High and Low Pressure Air Lines
2054-2
MAIN PLATE (Underside)
BACK OF BASE
BOTTOM OF BASE
FRONT OF BASE
BLACK (HP)
GRAY (LP)
BLUE
RED
EXTERNAL INPUT
REGULATORS
GAUGES
REGULATORS
AIR CYLINDER (1 of 2)
BLOW REGULATOR
SOLENOID 8
TO BEAM
SOLENOIDS
2 AND 3
TO OUTPUT TUBE
PART BLOW IN
HIGH
LOW