Ryobi CS-4016 Owner's Operating Manual page 6

The following may interfere with the brake's ability
to protect the operator:
1. Saw wrongly held too close to the operator's
body. Kickback time may be too fast even for a
perfectly maintained brake to work in time.
2. The operator's hand may not be in position to
contact the hand guard.
3. Brake will not be tripped.
4. Lack of proper maintenance lengthens the
brake's stopping time, making it less effective.
16
17
15 20
1. Chain bar
2. Saw chain
3. Chain tensioning screw
4. Bucking spikes
5. Chain brake lever / front hand guard
6. Front handle
7. Starter handle
8. Spark plug (under the air filter cover)
9. Air filter cover
10. Ignition switch
11. Safety lock
RULES FOR SAFE OPERATION
DESCRIPTION
1
8-9
21 3 18
5. Dirt, grease, oil, pitch, etc. getting into the
working parts of the mechanism may lengthen
the stopping time.
6. Wear and fatigue of the activating brake spring,
and wear of the brake/clutch drum and pivot
point may lengthen the brake's stopping time.
7. A damaged hand guard and lever may render
the brake inoperative.
2 4 5
12
12. Oil tank cap
13. Fan housing
14. Fuel tank cap
15. Rear handle / bootstrap
16. Chain guard
17. Choke / (carburettor setting)
18. Bar fastening nuts
19. Throttle lever
20. Primer bulb
21. Chain brake / clutch cover
6
6 7 10 11
13 14 19