Martin Engineering M3747-05/12 2 Martin
®
Air Cannon Maintenance Instructions
6. Remove the valve from tank.
7. Remove 1/4-in. bolts that hold basket to exhaust valve.
8. Remove old piston and spring assembly.
9. Inspect bearing surface for excessive wear or stress fractures in the aluminum casting.
10. Remove o-rings and clean all mating surfaces.
All o-ring mating surfaces need to be clean and smooth
for an air tight seal. Apply a small amount of grease to
o-rings to ensure o-rings stay secure in the o-ring
groove during assembly. Make sure o-rings are not
pinched during reassembly.
11. Install new piston and spring into bearing basket.
12. Install o-ring on exhaust valve.
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