P231_19
Sprocket Cover Nut
P231_20
Adjusting the Chain
1. Place the pole pruner on a clean,
flat surface. (For readjustment
during operation, shut down the
engine, then allow the guide bar
and chain to cool before proceeding
with the adjustment procedure).
2. Loosen the sprocket cover nut with
a plug wrench (Figure 17).
Figure 17
Figure 18
Chain Tensioning
Screw
P231_21
Figure 19
16
3. Lift the nose of the guide bar while
turning the chain tensioning screw.
See Figure 18.
• clockwise to tighten the chain
• counter clockwise to loosen the
chain.
4. Pull the chain by hand along the
top of the guide bar several times
from the engine to the bar’s tip.
The chain should feel snug but still
pull freely. See Figure 19.
5. Tighten the sprocket cover nut
securely while lifting the tip of the
guide bar.
6. Inspect the chain for correct
adjustment (more frequently with a
new chain). The chain should feel
snug but still pull freely.
CAUTION!
A loose chain can jump off the
guide bar causing damage to the
chain and associated equipment.
Always make sure the chain is
properly adjusted; check more
often when you are breaking in a
new chain.
IMPORTANT!
Proper chain adjustment is essential
for maximum performance, long chain
life, and operator safety. Always
inspect chain tension before operating
the pole pruner.
WARNING!
The saw chain is very sharp. Wear
gloves to protect your hands when
handling.
WARNING!
Never attempt to install, replace,
or adjust the chain with the engine
running.
OPERATION
21
Idle the engine briefly before stopping
(about 2 minuts), then slide the
ignition switch to the “O” (engine
OFF) position. See Figure 27.
The engine must return to idle speed
whenever the throttle lever is released.
Idle speed is adjustable, and must be set
low enough to permit the engine clutch
to disengage the cutting attachment.
Check and Adjust Idle Speed
1. Start the engine and allow it to
warm up at low rpm.
2. If the cutting attachment rotates at
engine idle, reduce idle speed by
turning the idle adjusting screw
counter-clockwise. See Figure 28.
Stopping the Engine
Adjusting Engine Idle
Idle Adjusting
Screw
Figure 27
Figure 28
Slower
Faster
NOTE:
Standard idle speed is
2,750 (+/– 250) rpm (min
-1
).
IMPORTANT!
Units with emission control systems
are equipped with factory preset
carburetor adjustments.
Only idle
adjustment can be done in the field.
OPERATION
WARNING!
The cutting attachment must
NEVER rotate at engine idle! If the
idle speed cannot be adjusted by
the procedures described here,
return the trimmer to your
Shindaiwa dealer for inspection.
