Bearing Replacement - Gilson Porta-Screen PS-4 Operating Manual

Gilson Company, Inc.
(4) Tighten the idler bracket adjusting screw until the
timing belt is tight, making certain that you do
not change the position of the shafts. Lock the
idler bracket in position with the nut. Tighten the
bracket mounting screws.
(5) Reassemble.
DO NOT PLUG IN THE PORTA-SCREEN
READY TO USE IT.

4.4 Bearing Replacement

Guide Bearing Assemblies: The Porta-Screen
1.
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 Bear-
ing Housing Unit (#59).
(5) Replace with new bearing housing assembly.
f. Reassemble in reverse order.
DO NOT PLUG IN THE PORTA-SCREEN
READY TO USE IT.
UNTIL YOU ARE
®
has three
®
frame.
®
UNTIL YOU ARE
®
Page 8
Connecting Rod & Drive Shaft Bearings: The Connect-
2.
ing 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 frame.
®
h. Loosen the motor mounting bolts to release tension
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.
Gilson Porta-Screen ® : PS-3 & PS-4