M6 SERIES IOM
6th EDITION
ISSUED 12/2014
27
C. Air Leak Test
Any time the actuator is modified or undergoes maintenance, a leak test needs to be completed to insure the
actuator is air tight and working correctly.
To perform an air leak test:
1. Use a soap and water mixture to coat the actuator at the designated points below:
a. Around the base of the pinion neck (1).
b. Around the base of the stops (2).
c. Endcaps (3)
d. The pinion base (4).
2
1
3
3
Port A
Port B
Fig. 9.16
4
Fig. 9.17
2. Apply air pressure to ports A and B (max 8bar/120psi). Any air leaks will be indicated with the soap bubbling.
3. In case of leakage around:
a. The limit stop bolts: check for o-ring damage, if none is found, turn the lock nut tighter until it no
longer leaks.
b. The endcaps: Disassemble the endcaps and check the o-ring for damage, if none is found ensure the
endcaps are properly seated and tightened.
c. The pinion top or bottom disassemble the actuator, replace the o-rings and reassemble.