Do not install a new cutting chain on a worn-out sprocket. Replace the sprocket no later than
after replacing a worn-out chain for the second time
(See chapter: POWER MATE Sprocket)
.
31
7.4. TENSIONING A CUTTING CHAIN
• Loosen both nuts on the fixing plate;
• Tighten the tensioning screw until the chain is properly tensioned;*
• Retighten both nuts on the fixing plate.
*The cutting chain is properly tensioned when it clings to the bottom side of the saw bar when cold
and can still be lifted on the upper side of the saw bar (somewhere in the middle) for approximately
three fourths of the gear teeth height.
Always wear gloves when checking the chain tension to prevent cutting your fingers on the
sharp chain!
7.5. ANGLES USED FOR SHARPENING THE CUTTING CHAIN
Figure shows the angles for sharpening the
DuraCUT 3/8˝ chain, which is used for firewood
processors
1. Cutting depth (0.025˝ = 0.65 mm) –
difference between the height of the blade
and teeth depth
2. Prong angle
3. Sharpening angle
4. File inclination
7.6. POWER MATE SPROCKET
Use only OREGON Power mate 3/8” sprockets (OREGON No. 22273). The sprocket has a wear indicator
(X). When the bottom point of the indicator is reached, discard the sprocket.
x
Summary of Contents for RCA 480 JOY
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