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Gilson Company, Inc.
Tighten the bracket mounting screws.
(5) Reassemble.
DO NOT PlUG IN THe POrTA-sCreeN
Are reADy TO Use IT.
4.4 Bearing replacement
1. Guide Bearing Assemblies: The Porta-Screen
three guide bearing assemblies: each has a housing
and guide bushing. The two upper guide bearings
(#34) are mounted to the top frame crossbar. The
lower guide bearing (#59) is mounted to the underside
of the vibrating unit.
If you notice side-to-side movement of the vibrating
unit during operation, inspect the guide bearings
and replace them if necessary. We recommend re-
placement of all three assemblies at the same time.
a. DISCONNECT AND LOCK OUT ELECTRIC
POWER.
b. Remove and set aside trays and pan.
c. Remove top frame screws (#2), and lift off top
frame crossbar (#1).
d. Upper:
(1) Remove mounting screws (#35) to detach
bearing housing (#34).
(2) Replace with new bearing housing assembly.
e. Lower:
(1) Remove all case covers.
(2) Remove the connecting rod mounting bolt
(#24).
(3) Lift the entire vibrating unit assembly up and
out of the Porta-Screen
(4) Remove mounting screws (#56) to detach
bearing housing unit (#59).
(5) Replace with new bearing housing assembly.
f. Reassemble in reverse order.
DO NOT PlUG IN THe POrTA-sCreeN
Are reADy TO Use IT.
2. Connecting Rod & Drive Shaft Bearings: The con-
UNTIl yOU
®
has
®
frame.
®
UNTIl yOU
®
Page 8
Gilson Porta-Screen
necting rod (#50) can be replaced as an assembly, or
you can press out and replace its bearing and bushing
(#52).
The drive shaft (#20) has front and rear bearings
(#47). We recommend replacement of both front and
rear bearings as a set.
a. DISCONNECT AND LOCK OUT ELECTRIC
POWER.
b. Remove and set aside trays and pan.
c. Remove top frame screws (#2).
d. Lift off top frame crossbar (#1).
e. Remove all case covers.
f. Remove the connecting rod mounting bolt (#24).
g. Lift the entire vibrating unit assembly up and out
of the Porta-Screen
®
h. Loosen the motor mounting bolts to release ten-
sion on the drive belt, and remove the drive belt
from its pulleys.
i. Loosen the setscrew in the drive pulley (#21), and
slide the pulley off the drive shaft.
j. Loosen the setscrew in the rear drive shaft bearing.
k. Loosen the idler bracket mounting and adjusting
screws (#45, 46) to release tension on the timing belt.
l. Remove the timing belt (#16).
m. Loosen the setscrew in the drive shaft pulley (#49),
and slide the pulley off the drive shaft.
n. Remove the mounting screws from the front drive
shaft bearing (#47).
o. Hold onto the top of the connecting rod (#50) while
you pull the drive shaft out from the front of the
machine with the front bearing attached.
p. Remove the connecting rod (#50).
q. Install new connecting rod assembly or press
new bushing and bearing into existing connecting
rod.
r. Replace drive shaft bearings if needed.
: PS-3 & PS-4
®
frame.
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