18
If maintenance is planned on the hydraulic clamp rod
assembly, do so now, using the instructions in the
next section�
To reassemble the hydraulic cylinder:
1. Slide the cylinder and base assembly onto the upper end
of the hydraulic clamp rod�
2. Dip the piston in hydraulic oil to lubricate the quad rings,
then insert the piston into the cylinder�
3. Install the jam nut and tighten it�
4. Insert the spring� Place the cap on the spring and apply
downward pressure on the cap�
5. Insert and tighten the screws�
6. Reattach hoses then rell the hydraulic pump. See
Draining and Relling the Hydraulic System on page 14�
7. Reinstall covers� DO NOT plug in or try to operate the
Testing Screen without all covers installed�
Hydraulic Clamp Rod Assembly
Disconnect power supply before
servicing or cleaning.
DO NOT plug in or operate the
Testing Screen without all covers installed.
Hydraulic clamp rods t through a series of guide bearings
and draw the Vibrating Unit Assembly parts together to
clamp trays in place for operation�
To check for wear in the guide bearings, apply pressure to
the hydraulic cylinders with your hand, front to back and
side to side�
If you have removed a cylinder, perform this test on the
upper end of the hydraulic clamp rod� If a cylinder (or clamp
rod) can be moved more than 1/32in in any direction, you
should replace parts in the hydraulic clamp rod assembly�
To replace hydraulic clamp rods and parts:
1. Unplug or otherwise disconnect the Testing Screen from
its power source, and lock out the connection�
2. If you have not done so, drain the system, then
disassemble and remove the cylinder� See Hydraulic
Cylinder Inspection and Repair on page 17�
3. Working through the access hole near the base of the
machine, drive the roll pin out of the clamp rod collar
(Fig� 8 on page 17)� Slide the clamp rod collar down to
rest on the lower guide bearing�
4. Loosen the upper and lower guide bearing screws�
5. Pull the clamp rod up and out of the Vibrating Unit
Assembly�
6. Replace the worn parts as needed�
7. To reassemble, reverse the procedure, except DO NOT
re-tighten the guide bearing screws� Follow hydraulic
cylinder reassembly instructions�
8. Finger-tighten the upper and lower guide bearing screws,
then give each an additional 360° tightening with a
wrench� Front and rear screws on each bearing need
to be equally tight� If screws repeatedly loosen during
operation, use a small amount of medium-stregth (blue)
Loctite�
9. After fully reassembling the unit with covers installed, run
the machine empty for a few minutes� It should run freely
and quietly�
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