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18
PLATFORM FOLDING AND UNFOLDING SPEED ADJUSTMENT
PERIODIC MAINTENANCE
1. The speed settings for the closing
cylinder are regulated by the pressure
relief needle valves located on the pump
manifold (FIGS. 18-1, 18-2, and
18-3). One valve is marked “O” (open
platform) and the other is marked “C”
(close platform).
2. To decrease platform opening
speed, turn opener valve adjustment
clockwise (FIGS. 18-1, 18-2, and
18-3). To increase platform opening
speed, turn opener valve adjustment
counter-clockwise (FIGS. 18-1,
18-2, and 18-3).
3. To increase platform closing speed,
turn closer valve adjustment
clockwise (FIGS. 18-1, 18-2, and
18-3). To decrease platform closing
speed, turn closer valve adjustment
counter-clockwise (FIGS. 18-1,
18-2, and 18-3).
POWER DOWN PUMP
FIG. 18-1
PUMP
MANIFOLD
CLOSER VALVE
ADJUSTMENT
OPENER VALVE
ADJUSTMENT
GRAVITY DOWN PUMP
FROM POWER UNIT WITH HOSES
FIG. 18-2
GRAVITY DOWN PUMP FROM
POWER UNIT WITH STEEL LINES
FIG. 18-3
PUMP
MANIFOLD
CLOSER VALVE
ADJUSTMENT
OPENER VALVE
ADJUSTMENT
PUMP
MANIFOLD
CLOSER VALVE
ADJUSTMENT
OPENER VALVE
ADJUSTMENT
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