Wood’s Powr-Grip PT10FS10TAIR - Manual (Page 22)

Rev 12.0/3-13 20 PT10FS10TAIR: #35143
T
ILT
C
OMPONENTS
M
AINTENANCE
Tilt Actuator
Tilt motion is accomplished using an air-powered linear actuator. Since the tilt actuator is
prelubricated, no additional lubrication is required under normal circumstances. The tilt actuator
is equipped with several adjustable features that are set at the factory and should not need
readjustment. However, in the event that adjustments are required, proceed as follows:
Tilt Speed Valves
The tilt speed valves located at each end of the tilt actuator control the speed of actuator
movement. Speed is adjusted independently for each direction of the actuator’s stroke, using an
adjustment screw located at the outside end of each speed valve, as follows:
1) Determine which direction of the stroke requires a speed adjustment, and identify the speed
valve governing speed in that direction: The speed valve at the upper end of the actuator
controls retraction (load movement from upright to flat), whereas the speed valve at the
lower end of the actuator controls extension (load movement from flat to upright).
2) Determine which direction to turn the valve’s adjustment screw in order to produce the
desired stroke speed: To reduce the speed of the stroke, turn the adjustment screw
clockwise . To increase the speed of the stroke, turn the adjustment screw counter - clockwise .
Note: The standard setting for the upper and lower speed valves is 6-1/2 turns counter-
clockwise from full clockwise.
3) Check the stroke speed and repeat steps 1-2 as necessary to obtain the desired adjustment.
Tilt Stop Valves
Tilt stop valves are integrated in the ends of the tilt actuator to control the cushioning effect at
each end of the stroke. An adjustment screw is flush-mounted on the side of the actuator
directly opposite from each tilt speed valve, in order to adjust the cushioning effect, as follows:
1) Determine which end of the stroke needs to be adjusted, and identify the adjustment screw
governing the cushioning effect at that end: The upper screw controls the end of the
retraction stroke, whereas the lower screw controls the end of the extension stroke.
2) Determine which direction to turn the adjustment screw in order to produce the desired
cushioning effect: To increase the cushioning effect, turn the adjustment screw clockwise .
To reduce the cushioning effect, turn the adjustment screw counter - clockwise .
Note: The standard setting for both upper and lower adjustment screws is 2 turns counter-
clockwise from full clockwise.
3) Check the cushioning effect and repeat steps 1-2 as necessary to obtain the desired
adjustment.
Tilt Master Valve
The tilt master valve controls airflow to the tilt actuator, in order to set the maximum stroke
speed in both directions. This prevents the lifter or load from being damaged if anyone attempts
to tilt the lifter when the actuator is not completely pressurized. Such a condition may exist after
shipping or storing the lifter, or if the tilt control valve is operated while the air supply valve is in
the “OFF” position.
CAUTION: Do not adjust the tilt master valve unless there is clear