Section 9
High Pressure Water System
20412997
8-2012/Rev 12
9-40
Pneumatic Actuator
The following procedure is used to service the pneumatic actuator.
Figure 9-32: Pneumatic Actuator
1. Unscrew and remove the cylinder head using a strap wrench and a pin spanner. Remove
the piston from the cylinder.
Do not install the pneumatic cylinder in a vise to remove the cylinder head. This
may distort the body and seize the piston, preventing proper operation.
2. Remove the o-ring on the cylinder head. Apply FML-2 grease to a new o-ring and install.
3. Remove the two o-rings on the piston. Apply FML-2 grease to two new o-rings and
install.
4. Install the piston in the pneumatic cylinder. Apply anti-seize compound to the threads on
the cylinder head and screw it into the pneumatic cylinder.
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