Ryobi RY40506 Operator's Manual page 17

 Replace the chain cover and reinstall the washer
and screw. Tighten the screw finger tight only.
The bar must be free to move for tension
adjustment.
 Remove all slack from chain by turning the
chain tensioning screw clockwise, assuring
that the chain seats into the bar groove during
tensioning.
 Tighten the chain cover screw securely.
NOTE: Chain is correctly tensioned when there is
no slack on the underside of the bar, the chain is
snug, but it can be turned by hand without binding.
If chain is too tight, it will not rotate. Loosen the
chain cover screw slightly and turn chain tension-
ing screw 1/4 turn counterclockwise. Retighten
chain cover screw securely.
CHAIN OILER
See Figure 19.
 Use premium bar and chain lubricant. It is de-
signed for chains and chain oilers and is formu-
lated to perform over a wide temperature range
with no dilution required.
 Remove the cap and carefully pour approxi-
mately 2 oz. of bar and chain lubricant into the
bar lube reservoir.
 Replace the cap and tighten securely.
 Check and refill the bar lube reservoir every time
the pole saw is used.
NOTE: Do not use dirty, used, or otherwise con-
taminated lubricants. Damage may occur to the
oil pump, bar, or chain.
CHAIN MAINTENANCE
See Figure 20.
For smooth and fast cutting, the chain needs to
be maintained properly. The following conditions
indicate that the chain requires sharpening:
 Wood chips are small and powdery
 Chain must be forced through the wood during
cutting
 Chain cuts to one side
During maintenance of the chain, consider the
following:
 Improper filing angle of the side plate can in-
crease the risk of a severe kickback.
MAINTENANCE
SPROCKET
SCREW
17 — English
TENSIONING SCREW
CHAIN
LOCK
COVER
WASHER
BAR LUBE
RESERVOIR
CHAIN
ROTATION
CHAIN
CHAIN
Fig. 17
Fig. 18
REMOVE
CAP
Fig. 19