Ryobi RY43161 Manual Del Operador página 16

 Chain must be re-tensioned whenever the flats on
the drive links hang out of the bar groove as
shown in fig. 11.
 During normal operation, the temperature of the
chain will increase. The drive links of a correctly
tensioned warm chain will hang approximately
.050 in. out of the bar groove, as shown in
fig. 12.
NOTE: New chain tends to stretch; check chain
tension frequently and tension as required.
NOTICE:
Chain tensioned while warm, can be too tight
upon cooling. Check the "cold tension" before
next use.
REPLACING THE BAR AND CHAIN
See Figures 13 - 16.
WARNING:
To avoid possible serious injury, stop the mo-
tor and disconnect from power supply before
replacing the bar, chain, or performing any
maintenance operation.
 Remove the chain cover screw and chain cover.
 The bar contains a bar stud slot that fits over the
bar stud. The bar also contains a chain tension-
ing pin hole which fits over the chain tensioning
pin.
 Place the bar onto the bar stud so that the chain
tensioning pin fits into the chain tensioning pin
hole.
 Fit the chain over the sprocket and into the bar
groove. The cutters on the top of the bar should
face toward the bar tip, in the direction of the
chain rotation.
 Replace the chain cover and install the chain
cover 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 tension-
ing.
MAINTENANCE
CHAIN
COVER
CHAIN COVER
SCREW
SPROCKET
 Lift the tip of the bar up to check for sag. Re-
lease the tip of the bar, and turn the chain ten-
sioning screw 1/2 turn clockwise. Repeat this
process until sag does not exist.
Page 16 — English
CHAIN
CHAIN
COVER
CHAIN COVER SCREW
SPROCKET
CHAIN
TENSIONING
PIN HOLE
CHAIN
ROTATION
CHAIN
TENSIONING SCREW
BAR
Fig. 13
CHAIN
TENSIONING PIN
BAR
STUD
BAR
BAR STUD
SLOT
Fig. 14
CHAIN
Fig. 15