Stihl TS 420 User Manual

24 TS 410, TS 420
5.3 Testing radial and axial
truth of running
Since the radial truth of running of
the cutting wheel changes if the
shaft diameter changes (due to
scoring, etc.), it is sufficient to
carefully inspect the shaft around
the mount for the cutting wheel.
The axial truth of running, on the
other hand, depends on the
condition of several parts and
should therefore be determined by
measurement.
– Undo the screw and remove the
thrust washer, see b 5.2.
: Fit a test wheel (1).
: Fit the thrust washer so that the
lugs (1) engage the grooves
(arrows) in the shaft.
370RA045 TG
1
370RA039 TG
1
1
– Insert and tighten down the
screw.
: Secure a dial gauge holder (1)
with fitted dial gauge (2) on the
guard so that the axial truth of
running can be determined for a
diameter of approx. 130 mm over
one full revolution of the wheel,
see test table.
– Remove the test equipment after
testing.
370RA047 TG
2
1

Stihl TS 420 Specifications

General

Engine Power	4.4 bhp
Weight	21.2 lbs
Arbor Size	20 mm
Maximum Wheel Size	350 mm
Maximum Cutting Depth	125 mm
Displacement	66.7 cc (4.1 cu. in.)
Fuel Capacity	710 cc