Hilti DX 76-MX Quick Start Manual - Supplement page 10

KNOWING HOW TO CLEAN THE TOOL
Check the Piston and
Piston Brake
a
Assemble the tool
a
b
Change if either the Piston or Piston Brake is worn.
Change only as a set both Piston and Piston Brake.
b
a
Check the Piston Brake/Stop and Piston is always assembled back in.
b
b
a
a b
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