23
Figure # 14 Flow Control Valve
HYDRAULIC INSTALLATION
1) If a hydraulic hose is being used
as the oil supply line to the jack,
install a 90
o
1/2" NPT hydraulic
elbow fitting to the oil inlet on the
jack. Make sure it points
downward toward the Upstand
Post. Install the flow control valve
on the 90
o
fitting and use Teflon
tape to seal the threads. Make
sure that the arrow label on the
flow control valve points toward
the pump unit. The purpose of the
flow control valve is to prevent
excessive speed in the DOWN
direction if the hydraulic hose fails
or is damaged. NOTE: It is very
important to position the flow
control valve correctly.
Reversing of the valve will
result
in very noisy operation of the
elevator in the UP direction
.
(See Figure # 14). The valve must
be positioned to the right of the jack and the jack must be rotated so that the valve is
close to the rail wall.
NOTE
If the flow control or hydraulic pipe are not positioned towards the back and right, they may
interfere with the sling.
2) Install an NPT to JIC adapter to the end of the flow control valve using Teflon tape to seal
the NPT threads. The open end will accept the hydraulic hose. (Thread sealer is not
required for JIC fittings where the hydraulic hose attaches.)
3) Fill the reservoir. The amount of oil required will vary depending on the job. The usable
fluid is 22 US gallons or 83.3 liters.
NOTE: THE PUMP AND MOTOR MUST BE
TOTALLY SUBMERGED IN OIL
. When filled to capacity, the tank should use
approximately 30 US gallons or 113.5 liters.
The recommended oil is a 32 weight (grade) “Hydraulic Oil”. Never use old oil.
When filling the reservoir, ‘top up’ the oil until it can be seen in the filter with the air
breather cap removed. Remember that the hydraulic cylinder and oil line are empty and
must be filled first when the motor starts up. This will reduce the amount of “usable” oil
for operation when the system is filled. It may be necessary to ‘top up’ the oil again once
the system is filled. The oil should be about 1" to 1 1/2" below the rim of the tank.
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