Guide Bar; Sprocket / Clutch Drum; Carburettor; Automatic Oiler - Shindaiwa 451S Owner's/Operator's Manual

Guide bar

NOTE
When replacing guide bar or saw chain, ask your shindaiwa dealer.
1. Groove 2. Oil hole
Clean before using.
- Clean the groove of the guide bar with a small screw driver, for example.
- Clean oil holes with a wire.
Reverse guide bar periodically.
Check sprocket and the clutch and clean the bar mount area before installation of the guide
bar.
Replace either or both if worn.

Sprocket / Clutch drum

∗ Worn out: 0.5 mm
The damaged sprocket will cause premature damage or wear of saw chain.
- When the sprocket has worn out 0.5 mm or more, replace it.
Check sprocket when you install new chain.
Replace it if worn.
Check clutch drum, if it rotates freely and smoothly.
If not, ask your dealer for repair.

Carburettor

When starting, idle speed adjuster (T) should be adjusted not to rotate the saw chain.
When there is some trouble with the carburettor, contact your dealer.
T: Idle speed adjuster
Do not adjust the carburettor unless necessary.
To adjust the carburettor proceed as follows:
- Start engine and allow it to run at high idle until warm.
- Turn the idle speed adjuster (T) anticlockwise until the saw chain stops moving.
- Turn idle speed adjuster (T) anticlockwise an additional 1/2 turn.
- Accelerate to full throttle to check for smooth transition from idle to full throttle.

Automatic oiler

1. Oil adjusting screw
The discharge volume of the automatic oiler is adjusted to 7 mL/min approximately at
7000 r/min, prior to shipment from factory.
- To increase the delivery volume, turn the adjusting screw anticlockwise.
When the adjusting screw touches stopper and stops, this position indicates maximum
discharge volume. (13 mL/min at 7000 r/min)
- Do not turn the adjusting screw beyond the maximum or minimum limit of volume adjust-
ment.
3. Guide bar
CAUTION
2. Decrease
28
4. Sprocket
3. Increase