Service manual
ENGINE
INSPECTION
4.
Inspecting camshaft oil clearance. Check the
oil
clearance of the camshaft
by
measuring
the
camshaft bore in
the
cylinder block
and
camshaft journal
diameter.
If
the oil
clearance is more than
the
limit, replace
the
camshaft or
cylinder block.
71
ani
C Oil clearance limit: 0.145 mm (0.0057 in)
5.
Inspecting camshaft runout. Check the camshaft
runout
and,
if
it exceeds the limit, replace the camshaft.
71
ani
C Runout limit: 0.08
mm
(0.003
in)
6.
Camshaft front bearing replacement. Mount
the
camshaft assembly in a vise equipped with copper or
aluminum plate, then remove the bolt, lock plate, cam
gear,
thrust plate, bearing outer face and
key.
R,
Using a press, press out the bearing.
b,
Check the removed parts for wear or other damage and
replace the parts
as
necessary.
c, Install the bearing onto the camshaft
with
a press.
d,
Assemble the thrust plate and camshaft gear onto
the
camshaft.
71 a
Tightening
torque:
6.4
-
9.5
m-kg
(46
-
69
ft-Ib)
71 C
Tightening
torque:
6.2
-
7.0
m-kg
(45
-
51
ft-lb)
7.
Inspecting camshaft end play. Measure
the
end play
of the camshaft with
the
thickness gauge
and
if the end play
is
more
than
the limit, replace the thrust plate.
71
ani
C
End
play limit:
0.3
mm
(0.012
in)
TESTING
CAMSHAFT'
END
PLAY
IDLER
GEAR
AND
IDLER
GEAR
SPINDLE
1.
Visual inspection. Check the damage
on
the
bushing
inner surface
of the idler gear and
the
spindle sliding surface
and,
if
necessary, replace the idler gear or spindle. Check
the
oil passage for clogging and,
if
necessary, clean
the
passage
with compressed
air or wire. '
2.
Inspecting clearance between bushing and spin-
dle. Check the clearance between
the
idler gear bushing and
the
spindle and,
if
it exceeds the limit, replace
the
idler gear
or spindle.
Clearance
71
ani
C
Standard:
0.034
-
0.084
mm
(0.0013
-
0.0033
in)
Limit:
0.15
mm
(0.006
in)
GEARS
CHECKING
CLEARANCE
BETWEEN
THE
1.\\\\
\\'K\\\<\I~\,(\\'I.'
BUSHING
AND
SPINDLE
1. Visual Inspection Check each gear tooth for
cracks
or
other damage.
2.
Inspecting
end
play
of
idler
gear. Check
the
end play
of
the idler gear and,
if
it exceeds
the'
limit, replace
the
thrust
plate or idler gear.
71
a
Standard
end play:
0.15
-
0.30
mm
(0.0059
-
0.0118
in)
,
71C
Standard
end play:
O.~O'"
0.030
mm
(0.0079
-0.0118
in)
71
ani
C Tightening torque:
2.3
-
3.2
m-kg
(16.6
-
23.1
ft-Ib)
FQE~:~:;~;~
).
I~
IDLER
GEAR
~,
')
THRUST
PLATE
CHECKING
~
IDLER
GEAR
):
END
PLAY
NOTE: THE 71C
USES
_
~
TWO IDLER GEARS;;;"... /
~"(.
3.
Inspecting
backlash
between gears. Check the
, backlash between each gear and,
if
it exceeds the limit,
replace the gears.
NOTE:
Before inspecting the backlash, check
the
end play
of
the idler gear and clearance between the idler gear bushing
and
spindle.
71an1C
Standard: 0.10 - 0.17
mm
(0.004 -0.007in)
Backlash
limit: 0.30
mm
(0.012 in)
'
....
'walERBEICE
I Engines & Generators
21