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Lubricate the following parts on a regular basis, but not as
often as the wrist pin assemblies:
Upper Connecting Rod Bearings
Access: Holes in front of top cover�
Lower threaded blocks (TS-2 Only)
Access: Panels on sides of machine case�
Removal of Top and Side/Back Covers
WARNING:
Disconnect power supply before
servicing or cleaning.
WARNING:
DO NOT plug in or operate the
Testing Screen without all covers installed.
TS-1/TS-3: Unscrew the knob on the pump handle�
Remove the thirteen screws that secure the top cover,
then remove the cover� Reinstall the knob�
TS-2: Turn the clamp rod handles so they point sideways
and away from the machine� Remove the thirteen screws
that secure the top cover, then remove the cover�
TS-1, TS-2, TS-3: Loosen or remove the five screws that
secure the side/back cover� Pivot the cover toward the back
of the machine, allowing it to be supported by the motor
wire�
Drive Assembly
WARNING:
Disconnect power supply before
servicing or cleaning.
WARNING:
DO NOT plug in or operate the
Testing Screen without all covers installed.
V-belt
Periodically check the motor V-belt for wear, tension, and
alignment� The belt should be snug, neither too tight nor
too loose. It should deflect about 1/4in (6mm) at the center
point between the pulleys (Fig� 5)�
Fig. 5: Correct V-belt tension
A worn, loose, tight, or misaligned V-belt can adversely af-
fect the operation of the Testing Screen. A good fit assures
longer life, less bearing wear, and quieter operation than a
belt which is too tight� A loose belt may cause the machine
to run too slowly or to slip�
1/4" (6mm)
Adjust or Replace the V-belt
WARNING:
Disconnect power supply before
servicing or cleaning.
WARNING:
DO NOT plug in or operate the
Testing Screen without all covers installed.
1. Remove the top and side/back covers�
2. Loosen the motor mounting bolts�
3. Verify that the pulleys are aligned and adjust if
necessary� Move the motor until the correct belt tension
is obtained (Fig� 5)�
4. Tighten the motor mounting bolts then re-verify the
belt tension�
V-belt Replacement
1. Loosen the motor mounting bolts and move the motor
toward the front of the machine until the belt disengages
from the motor pulley�
2. Insert a pry bar under the front of the case top and
over the top of the Vibrating Unit Assembly� Shift the
Vibrating Unit Assembly until the holes in the Vibrating
Unit Assembly and in connecting rod align� Remove the
shoulder bolt�
3. Rotate connecting rod upward until you can remove
the belt�
4. Install the new V-belt around the connecting rod�
5. Replace the shoulder bolt then place the V-belt around
the pulleys� Make sure that the pulleys are aligned�
6. Move the motor toward the rear of machine until the
correct belt tension is obtained (Fig� 5)� Tighten the
motor mounting bolts then re-verify the belt tension�
Connecting Rod Assembly
WARNING:
Disconnect power supply before
servicing or cleaning.
WARNING:
DO NOT plug in or operate the
Testing Screen without all covers installed.
Gilson recommends replacing the connecting rods as com-
plete assemblies to avoid fit and tolerance problems during
installation� Use the following procedure:
11
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