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Omponents, Aintenance, Tilt actuator – Wood’s Powr-Grip PT10FS10TAIR User Manual

Page 22: Tilt speed valves, Tilt stop valves, Tilt master valve

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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