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PPT-280 MAINTENANCE
X7702091009 29
© 02/2014 ECHO Inc.
Guide Bar and Saw Chain Replacement
Never try to replace or adjust guide bar and saw chain with engine running. Always disconnect
spark plug wire before servicing guide bar and saw chain. This saw chain is VERY sharp, wear heavy
gloves to protect your hands when handling it. Wear eye protection meeting CE or ANSI
specification Z87.1.
Guide Bar Replacement / Installation
Level 2.
1. Remove two (2) guide bar nuts (A) and sprocket guard
screw (B), and turn saw chain tension adjustment screw (C)
counterclockwise to release tension.
2. Remove sprocket guard (D).
3. Remove guide bar and saw chain from gear case and
sprocket.
4. Remove chain from guide bar and check guide bar for
damage and excessive or uneven wear. Replace guide bar
if necessary
5. Install chain on guide bar with cutters on top of bar facing
toward bar tip.
6. Install guide bar and chain on gear case, engaging chain
with drive sprocket (E).
7. Turn tension adjustment screw (C) to ensure chain tension
adjuster pin fits into the guide bar adjuster hole.
8. Install sprocket guard (D), and tighten guide bar nuts finger
tight and install guide bar cover screw (B).
9. Adjust chain tension.
Sprocket Guard Cleaning
1. Remove two (2) guide bar nuts (A), and unscrew sprocket guard screw (B).
2. Remove sprocket guard (D).
3. Gently brush debris from inside sprocket guard and from around sprocket.
4. Turn tension adjustment screw (C) to ensure chain tension
adjuster pin fits into the guide bar adjuster hole.
5. Install sprocket guard (D), tighten guide bar nuts (A) finger
tight, and fasten sprocket guard screw (B).
6. Adjust chain tension.
A
C
B
D
E
B
D
A
C