Service
310622C
25
Bearing and Air Gasket Removal
Tools Required
•
Torque wrench
•
10 mm socket wrench
•
Bearing puller
•
O-ring pick
•
Press, or block and mallet
Disassembly
1.
Relieve the pressure.
2.
Remove the manifolds and disassemble the ball
check valves as explained on page 22.
3.
Remove the fluid covers and diaphragm assemblies
as explained on page 23.
4.
Disassemble the air valve as explained on page 18.
5.
Using a 10 mm socket wrench, remove the screws
(22) holding the air covers (20) to the center housing
(1).
6.
Remove the air cover gaskets (19). Always replace
the gaskets with new ones.
7.
Use a bearing puller to remove the diaphragm shaft
bearings (17), air valve bearings (12) or pilot pin
bearings (13). Do not remove undamaged bearings.
8.
If you removed the diaphragm shaft bearings (17)
reach into the center housing (1) with an o-ring pick
and hook the u-cups (10), then pull them out of the
housing. Inspect the u-cups. See F
Do not remove undamaged bearings.
WARNING
To reduce the risk of serious injury, whenever you are
instructed to relieve pressure, always follow the
Pres-
sure Relief Procedure
on page 13.
If you are removing only the diaphragm shaft
bearing (19), skip step 4.
F
IG
. 19
F
IG
. 20
ti4733
19
20
22
1
10*
1
12
13
17
ti4731