Echo PPF-280 - Manual (Page 30)

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© 02/2014 ECHO Inc.
MAINTENANCE PPF-280
Saw Chain Tension Adjustment
Always disconnect spark plug wire before servicing cutting
attachment. Wear gloves when handling saw chain,
otherwise serious personal injury may result.
To Adjust Saw Chain Tension
1. Move stop switch to STOP position.
2. Disconnect spark plug lead.
3. Loosen two guide bar nuts (A) until finger tight.
Always loosen guide bar nuts before turning the chain tension adjuster, otherwise the clutch cover and
tensioner will be damaged.
4. Hold the bar nose up, and turn the adjuster screw (B) clockwise until the chain fits snugly against the
underside of the bar, as shown. Cold Chain Only - turn adjuster screw CW an additional 1/8 - 1/4 turn.
5. Tighten both guide bar nuts with nose held up. Tighten rear
nut first.
6. Pull the chain around the guide bar by hand. Reduce the
chain tension if you feel tight spots.
7. When chain is properly tensioned, tighten guide bar nuts
securely.
Tighten guide bar nuts to 8 - 9 N•m (71 - 80 in. lbs.) DO NOT
over-tighten nuts. Damage may result
8. Keep chain properly tensioned at all times.
Note: All chains require frequent adjustment.
9. Connect spark plug lead.
Filing Standard Saw Chain
Power Pruner B&C Combinations
BAR P/N CHAIN P/N CHAIN TYPE LINKS PITCH GUAGE
Narrow Kerf
10" narrow bar P/N
10A4CD3739
90PX39CQ 90 39 3/8” 0.043
12" narrow bar P/N
12A4CD3744
90PX44CQ 90 44 3/8” 0.043
Regular
10" regular bar P/N
10A0CD3739
91VXL39CQ 91 39 3/8” 0.050
12" regular bar P/N
12A0CD3744
91VXL44CQ 91 44 3/8” 0.050
A
B