Ryobi RY40500 - Manual (Page 30)

30 - English
MAINTENANCE
SIDE PLATE ANGLE
See Figure 39.

CORRECT - 80° Produced automatically if cor-
rect diameter file is used in file holder.
 HOOK - “Grabs” and dulls quickly. Increases
potential of KICKBACK.
Results from using a file with diameter too small,
or file held too low.
 BACKWARD SLOPE - Needs too much feed
pressure, causes excessive wear to bar and
chain.
Results from using a file with diameter too large,
or file held too high.
DEPTH GAUGE CLEARANCE
See Figures 40 - 41.

The depth gauge should be maintained at a
clearance of .025 in. Use a depth gauge tool
for checking the depth gauge clearances.
 Every time the chain is filed, check the depth
gauge clearance.
Use a flat file and a depth gauge jointer to lower
all gauges uniformly. Depth gauge jointers are
available in .020 in. to .035 in. Use a .025 in. depth
gauge jointer. After lowering each depth gauge,
restore original shape by rounding the front. Be
careful not to damage adjoining drive links with
the edge of the file.
Depth gauges must be adjusted with the flat file in
the same direction the adjoining cutter was filed
with the round file. Use care not to contact cutter
face with flat file when adjusting depth gauges.
GUIDE BAR MAINTENANCE
When the guide bar shows signs of wear, reverse
it on the saw to distribute the wear for maximum
bar life. The bar should be cleaned every day of
use and checked for wear and damage.
Feathering or burring of the bar rails is a normal pro-
cess of bar wear. Such faults should be smoothed
with a file as soon as they occur.
RESTORE ORIGINAL
SHAPE BY ROUNDING
THE FRONT
FLAT FILE
DEPTH GAUGE JOINTER
Fig. 40
Fig. 41
INCORRECT SIDE PLATE
FILING ANGLE
BACKWARD
SLOPE
HOOK
Fig. 39
80°
CORRECT SIDE
PLATE FILING
ANGLE
A bar with any of the following faults should be
replaced.

Wear inside the bar rails which permits the chain
to lay over sideways.
 Bent guide bar.
 Cracked or broken rails.
 Spread rails.
Lubricate guide bars with a sprocket at their tip
weekly. Using a grease syringe, lubricate weekly in
the lubricating hole. Turn the guide bar and check
that the lubrication holes and chain groove are free
from impurities.