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3.5
7. Swing the blade guard into the closed position. NOTE: The drive wheel door can not be closed unless the blade
guard is closed.
8. Snap the door drain tube back into its retainer.
9. Close the drive wheel door and the right hand base side cover.
10. Turn the Blade Change Mode key switch to the ‘OFF’ position.
11. Switch the hydraulics ON. Set the blade to minimum speed, and then start and run the blade for 20 seconds.
12. STOP the blade.
13. Turn the blade change key switch to the ‘ON’ position.
14. Open the drive wheel door to inspect the blade tracking. Open the right hand base side cover to check the posi-
tion of the blade brush. Refer to following pages for tracking adjustments, if necessary.
15. Advance the head and push in the head back adjustment lever. This will return the head to the proper position.
16. Break in the new blade.
BLADE TRACKING
Blade tracking refers to the lateral position in which the blade runs on the blade wheels. On metal-cutting saws the track-
ing is set so that the teeth project (or overhang) beyond one edge of the wheels so that interference between the wheel
and the “set” of the teeth does not flatten the set, or chew up the wheel. For the 1.50” wide blades used on the V-25, the
designed overhang is .200 - .220”.
The actual position in which a blade tracks depends upon three things:
The lateral position of the wheels: This is factory set, and should not normally need to be re-adjusted. On the V-25, the
drive wheel lateral position is adjusted by two push and two pull bolts in the drive wheel retaining cap. The idler wheel
lateral position is adjusted by a large (1.5” across flats) hex bolt, and locked by a concentric round head socket screw.
Hyd-Mech Service should be contacted before making any adjustment to lateral wheel position.
The angular position of the blade wheels: Although apparently parallel to each other, the blade wheels are tilted slightly
and adjustment of the tilt of each wheel is the primary method of adjusting blade tracking. In general, tilting the wheels
away from each other, as viewed from the “tooth edge” of the wheels, causes the blade to run farther onto the wheel
(overhang decreases).
The condition of the wheel surfaces: With prolonged use the wheels may wear unevenly so that the front edge has a
slightly smaller diameter than the rear edge. This will result in the blade tracking farther off the wheels. Moderate wheel
wear can be offset by adjusting wheel tilt, but excessive correction by wheel tilt will cause premature blade cracking, and
the only solution is to replace the worn wheel(s).
Adjustment of the tilt of either wheel affects the tracking on it, as well as the tracking on the other wheel. Thus blade-track-
ing adjustment should always begin at the wheel where the tracking is farthest out of specification. Using the instructions
below, adjust the worst wheel, run the blade slowly for about 5 – 10 seconds, stop the machine and re-check tracking at
both wheels. Repeat the process until tracking at both wheels is within tolerance, test running the blade for longer periods
each time, as the desired tracking is approached.
Содержание V-25APC
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