• Remove the fan guard, unscrew the cap and remove the cover, air filter and cover of the air inlet silencer
(1).
• Disconnect head (13) from the inlet an outlet pipe flanges. Remove cylinder head cover (12). Remove
head.
• Remove spring (3), outlet valve guard (4) and outlet valve disc (5).
• Lift off valve seat (6) and remove inlet valve disc (7). Do not remove guide pins (8).
• Remove and discard all O-rings.
• If necessary, remove the carbon deposits from the inlet valve guard at the cylinder top. Take care that no
dirt drops into the cylinder.
• Clean and inspect all parts.
• Fit a new O-ring (11). Do not stretch the cord while inserting it in its groove; the ends should meet.
• Put a new inlet valve disc (7) into place and install valve seat (6).
• Fit new O-rings (9) and (10).
• Install a new outlet valve disc (5), guard (4) and spring (3).
• Install cylinder head cover (12). Fit new O-rings/gaskets for the pipe flanges. Fit the flange and cylinder
head bolts and tighten them alternately.
• Reinstall head (13). Fit a new joint (14). Install cylinder head cover (12). Fit new O-rings/gaskets (2) for
the pipe flanges. Fit the flange and cylinder head bolts and tighten them alternately.
• Reinstall the fan guard, cover of the air inlet silencer, air filter, cover (1) and cap.
Torque value Torque value Torque value
M6: 10 Nm ±2 M8: 23 Nm ±2 M10: 46 Nm ±5
6.3 Air filter
To replace the air filter, follow these steps:
1. Stop the compressor.
2. Unscrew the cap on top of the cover. Lift off the cover and the filter element. Take care that no dirt drops
inside the suction silencer.
3. Using a damp cloth, clean the filter chamber and cover. Discard damaged elements.
4. Install the new element, cover and cap.
Instruction book
58 2920 7089 90
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