4
WARNING:
Lift the jack using only lifting eyebolt(s) or
lifting bar. Never attempt to lift the jack by using the
handle assembly. The handle assembly is to be used
only for transporting the jack on its wheels and for positioning
the jack under the jacking point.
5. Using the handle assembly, adjust the jack position so that
the cylinder load cap is centered under the jacking point of
the load.
WARNING:
Be sure that the jack is positioned on a
solid and level support surface, with the lifting cylinder
perpendicular to the ground. Jacking at an angle can
allow the jack to slip out of position, resulting in loss of load. As
required, use a swivel load cap to properly engage angled lifting
points. Refer to Section 5.5 for additional information.
5.0 OPERATION
5.1 Control Valves (See Figure 3)
4-Way Manual Valve:
With pump motor running:
• Move lever to the extend position to raise the cylinder.
• Move lever to the retract position to lower the cylinder.
• Center position is neutral/hold. Cylinder stops and holds the
load. This is also referred to as the
“
idle
”
position.
4-Way Air Operated Valve with Pendant:
• To start motor and extend cylinder - press up-arrow button.
• To start motor and retract cylinder - press down-arrow button.
• For neutral/hold - release both pendant buttons. Motor will
stop.
Lifting speed and torque can be regulated by using the air
pressure regulator. The regulator should be adjusted to 100 psi
[7 bar]
maximum
with air motor running and air supply valve
completely open.
IMPORTANT:
Pressure settings of above 100 psi [7 bar] will
result in reduced air motor life and will void product warranty.
A
B
Manual Valve: Center position is
NEUTRAL/HOLD
.
Air Operated Valve: Stays in center neutral/hold position
until pendant
down-arrow
or
up-arrow
button is pressed.
RETRACT
(lower)
RETRACT
(lower)
EXTEND
(raise)
EXTEND
(raise)
Figure 3, Control Valve and Pendant Details
5.2 Jacking Safely
You must know the weight of what you intend to lift and choose
a jack with
at least 20 percent
additional capacity.
All persons operating the jack should obtain and be familiar with
the
American National Standards Institute
rules that apply to
hydraulic rams and jacks (ASME ANSI B30.1) or the equivalent
standards used in your country or region.
WARNING:
Never place any part of your body under the
load at any time while it is being lifted, lowered, or
hydraulically supported by the Pow'r-Riser jack.
WARNING:
The Pow'r-Riser jack is intended for lifting
purposes only and should not be used to hydraulically
support the load for any period of time after the lift has
been completed. Support the load with U-Rings or other suitable
load supports immediately after it has been lifted to the desired
height.
WARNING:
Never leave the Pow'r-Riser jack
unattended during operation, even for a brief period of
time. Closely monitor jack operation at all times and be
prepared to stop lifting or lowering immediately.
WARNING:
Do not use the Pow'r-Riser jack outdoors in
windy conditions. Changes in wind direction or velocity
could cause the load to become unstable and fall.
5.3 Operating Instructions (See Figures 3, 4 and 5)
TO RAISE THE LOAD:
1. Be certain that the jack is positioned on a solid and level
surface, capable of supporting the load and the base of
the jack. Be sure that the lifting cylinder is perpendicular to
the ground. See Section 4.4 for additional jack positioning
instructions.
2. If a high jacking point requires a taller jack, install extensions
and spacers (optional accessories) on the cylinder as
required. Refer to Section 5.4 for installation instructions
and additional information about extensions and spacers.
3. Place a piece of plywood or other compression material
(approximately 1/4" [6,3 mm] thick with good friction
characteristics) between the cylinder load cap and the
jacking point. This will provide a small amount of cushioning
and will also help prevent damage to the jacking point.
4. To raise the load, open the air supply valve to start the motor.
Then, move the control valve lever to the extend position. If
jack is equipped with pendant, depress the up-arrow button
to start motor and extend cylinder.
CAUTION:
When lifting with more than one jack, be
especially careful to keep the load level. Leveling is
best accomplished by throttling with the air supply
valve or by alternating and stopping jacks to keep the load level
enough so it remains stable.
5. When load has reached the desired height, move the control
valve lever to the center (neutral/hold) position. If jack is
equipped with pendant, release up-arrow button to return
valve back to the center (neutral/hold) position.
6. Be sure that the proper Simplex U-Rings are installed on
the cylinder (refer to Section 5.6 for U-Ring installation and
stacking instructions). If U-Rings are not used, be sure that
other load supports of appropriate load rating are in place.
7. Move the control valve lever to the retract position. Allow the
load to lower until it is supported by the U-Rings or other
load supports. Then, return the lever to the center (neutral/
hold) position. If jack is equipped with pendant, depress and
release the down-arrow button as required, until the load is
supported by the U-Rings or load supports.
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