Adjusting the Chain
Stopping the Engine | Adjusting Engine Idle |
OPERATION
WARNING!
Never attempt to install, replace, or adjust the chain with the engine running.
WARNING!
The saw chain is very sharp. Wear gloves to protect your hands when handling.
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.
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).
Sprocket Cover Nut
Figure 17
3.Lift the nose of the guide bar while turning the chain tensioning screw. See Figure 18.
Chain Tensioning
Screw
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.
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.
Figure 27
Idle the engine briefly before stopping (about 2 minuts), then slide the ignition switch to the “O” (engine OFF) position. See Figure 27.
Idle Adjusting
Screw
Faster
Slower
Figure 28
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
NOTE:
Standard idle speed is
2,750 (+/– 250) rpm
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.
IMPORTANT!
Units with emission control systems are equipped with factory preset carburetor adjustments. Only idle adjustment can be done in the field.
OPERATION
16 | 21 |