URAL Motorcycles 2000 -10 series, Руководство по ремонту, Страница: 105 / 193

Camshaft servicing requires removal of engine from frame. Tappets may be removed
with the engine installed.
Removing and Reinstalling the Camshaft
(With the timing covers, generator, both cylinders and all tappets removed.)
Required tools are:
•
backlash indicator 450-182 for measuring the backlash between the teeth of timing
drive gearing
•
end play indicator 450-212 for measuring the end play of timing drive gearing
•
mandrel 345-327-3 for removing the camshaft
•
mandrel 345-341-3 for pressing in the camshaft
NOTE: Before removing the
camshaft, measure the
backlash between the teeth of
timing gears and the runout of
timing drive gearing.
To measure timing gear
backlash:
1. Set up the backlash
indicator 450-182 and
fasten it on the upper right-
hand threaded hole.
Measure the clearance
between the gearing teeth,
then remove the tool (Fig.
4.5-2).
2. Set up the end play
indicator 450-212 and
fasten it on the right-hand
threaded hole. Measure
the end play, then remove
the tool (Fig. 4.5-3).
Timing gear backlash in a
new engine should be within
.001 to .004 inch / 0.01 to
0.12 mm. Clearance variation
in a pair of gears should not
exceed .002 inch / 0.05 mm.
Maximum clearance in
service should not
exceed .011 inch / 0.30 mm measured at every tooth. End play or runout is tolerated
within .016 inch / 0.04 mm.
Fig. 4.5-1. Measuring
the timing gear cover
Fig. 4.5-2. Measuring the
backlash in meshing of the
timing drive gears.
Fig. 4.5-3. Measuring the
runout of the timing drive
gears.