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Gilson Company, Inc.
5.5 tS-1 Hydraulic Clamping System
The TS-1 hydraulic clamping system consists of a low-
pressure hydraulic pump, two hydraulic cylinders, and
two hydraulic clamp rod assemblies. The system uses
a medium-viscosity hydraulic oil such as Shell Tellus 25
or Mobil AW 32.
WArninG!:
Disconnect the machine from its power
source and lock out the connection prior to performing
maintenance and/or repairs.
5.5.1 Checking the oil
To determine the level and quality of the hydraulic oil:
a. Unplug or otherwise disconnect the Testing
Screen from its power source, and lock out the
connection.
b. Release the pressure in the system by pulling the
pump handle all the way toward the front of the
machine.
c. Remove the five screws that secure the external
pump cover to the top, and lift the cover off.
d. Observe the position of the internal pump cover:
its vent is slightly closer to the front (handle) end
of the pump than to the back. Remove the internal
pump cover and set it aside carefully so that you
will know how to reinstall it later.
e. The reservoir should be filled to a 1/4in from the
top, and the oil should appear clean.
f.
If oil is clean but low, fill tank to correct level and
reassemble.
g. If oil appears dirty, first replace the internal pump
cover. Then drain and refill the system, following
the steps in Section 5.5.2 beginning with the letter
C.
5.5.2 Draining & refilling the Hydraulic System
a. Unplug or otherwise disconnect the Testing
Screen from its power source, and lock out the
connection.
b. Clean the top of the TS-1 so you have a clean
environment to prevent foreign materials from
contaminating the oil.
c. Release the system pressure by pulling the pump
handle all the way toward the front of the machine.
(If you are continuing from checking the oil and
have removed the external pump cover, leave it
off.)
d. Remove the top and side/back covers, following
instructions in Section 5.2.
e. Disconnect the hose from one of the hydraulic cyl-
inders, leaving the other end of the hose connected
to the pump. Place the free end of the hose into
a clean container at a level that will allow gravity
to empty the system. Pump the handle carefully
to drain the hydraulic oil from the system.
f.
Observe the position of the pump cover: Its vent
is slightly closer to the front (handle) end of the
pump than to the back. Remove pump cover and
set it aside carefully so that you will know how to
reinstall it later.
g. If there is sludge in the bottom of the pump res-
ervoir, remove the pump from the machine and
clean it out with solvent before refilling with oil.
h. If repairs are to be made, continue disassembly
as described below in Section 5.5.3, "Hydraulic
Pump." If you are only replacing hydraulic oil,
continue to the next step.
i.
Reconnect the hose to the cylinder.
j.
Fill the pump reservoir to within 1/4in of the top.
Replace the pump cover in the same direction as
it was before you moved it. Pump up pressure
with short strokes on the pump handle. Release
pressure by pulling the handle all the way toward
the front of the machine.
k. Remove the pump cover and add hydraulic oil
to fill pump reservoir to within 1/4in of the top
again.
l.
Replace cover again in the proper position, and
tighten down the mounting screws.
Page 11
Gilson Testing Screens: TS-1 & TS-2
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