Raider RDP-GCS21, User Manual

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3.2. Installation of guide bars and saw chain.
Prior to guide bar installation remove plastic transport spacer, placed on guide fixing screws under the guard. Use pin
and adjustment screw for adjustment of chain tension. It is very important that the bolt located on adjustment screw falls into
hole in the guide bar during installation of the guide bar.
You can move the bolt to the front and back by turning the adjustment screw. Those parts must be set appropriately prior
to starting guide bar installation in the saw.
Guide bar and chain are supplied separately.
Brake lever (6) must be in the upper (vertical) position.
Unscrew the guide bar fixing nuts (7) and remove the casing (10).
Put the chain (21) onto driving chain wheel located behind the clutch.
Install the guide bar (20) (slide it behind the clutch) onto guiding screws and push towards driving chain wheel.
Put the chain (21) onto guide bar chain wheel (22) from below.
Move the guide bar (20) away from the driving chain wheel, so chain guiding links are placed in the guide bar groove.
Ensure the pin of the chain tension adjustment screw is in the middle of the lower hole of the guide bar (20), adjust when
necessary.
Place the casing (10) in its place and fix by slightly tightening guide bar fixing nuts (7).
Strain the chain appropriately using the chain tension adjustment screw (8). Chain tension is appropriate when the chain
can be lifted by 3 to 4 mm in the middle of the guide bar in horizontal position.
Firmly tighten guide bar fixing screws (7) while holding the guide bar tip.
Prior to guide bar and chain installation ensure that position of chain cutting blades is appropriate (correct position of the
chain on the guide bar is shown on the tip of the guide bar). Always wear protective gloves during checks and installation of
the chain to prevent cuts from sharp edges of the chain.
New chain requires start-up period, which lasts approximately 5 minutes. Chain lubrication is very important in this phase.
Check chain tension after start-up period and readjust if necessary.
Check and adjust the chain tension frequently. Too loose chain can easily slide off the guide bar, quickly wear out or
quickly wear out the guide bar.
3.3. Filling saw tank with oil.
Oil tank in new chain saw is empty. Fill the tank with oil prior to first use.
Unscrew oil filler plug (18).
Pour in maximally 260 ml of oil (be careful to avoid contamination of oil during filling of the tank).
Screw oil filler plug (18).
Do not use oil that has been already used or regenerated, as this may damage the oil pump. Use SAE 10W/30 oil for the
whole year or SAE 30W/40 in summer and SAE 20W/30 in winter.
3.4. Filling the fuel tank.
When filling the fuel, follow these rules:
Engine must not work.
You must not spill the fuel.
Accordingly to the below table, mix petrol (lead-free with octane number 95) with good quality engine oil for two stroke
engines.
Recommended fuel blend ratio.
Working conditions Petrol: oil
Working conditions Petrol: oil 25 : 1
1 L gasoline - 40ml two strocke oil
Unscrew fuel filler plug (15). Pour in previously prepared fuel blend (max. 550 ml). Screw fuel filler plug (15).
Most problems with combustion engines result directly or indirectly from fuel used. You must not use oil designed for