Service manual
ENGINE
INSPECTION
CHECKING
.
CLEARANCE
BETWEEN
TUI:
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BUSHING
AND
SPINDLE
CHECKING
THE
GEARS
1. Visual Inspection. Check each gear (idler gears, injection
pump drive gear, crankshaft gear, camshaft gear) for
cracks or other damage.
If
necessary, replace as required.
2.
Inspecting end play
of
idler gear. Check the end play
of
the idler gear with a dial indicator as shown.
If
it exceeds
the specified limit, replace the thrust plate or idler gear.
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NOTE:
Measure
the
end play after tightening
the
idler
gear attaching nuts
to
the
specified
torque
value.
Thrust
plate
torque
(1fl"
socket)
17
-
231t-lb
(2.3
-
3.2
kg/m)
Standard
end
play
0.0059
-
0.0118
in
(0.15
-
0.30
mm)
3. Check backlash between
gears.
Check the backlash
between each gear with a dial indicator.
NOTE:
Check
the
backlash after assuring that
the
idler
gear end play and
the
clearance between
the
idle
gear
bushing
and
spindle
are
within
the
standard.
Backlash
Standard
0.0039
-
0.0079
in
(0.10ยท0.20
mm)
Backlash
Limit
0.0118
in
(0.30
mm)
TAPPET
1. Visual inspection. Check the tappet for cracks and other
damage and,
if
damaged replace the tappet. Check for
abnormal wear
of
the portion
of
the tappets that contact
with the cam, and
if
anyone
is abnormally worn, replace
the tappet.
2.
Inspecting Clearance Between Tappet and Tappet
Bore.
Check the clearance between the tappet and tappet
bore and,
if
the clearance is greater than the limit, replace
the tappet
or
cylinder block.
Clearance
Limit
0.0039
in
(0.10
mm)
TAPPET
CLEARANCE
.~
.'
..
PUSH
RODS
1. Visual Inspection. Check each push rod for damage to
eithfr end.
If
damage is severe, replace the push rod.
2.
Bend Inspection. Check the push rod for bend and,
if
it
exceeds the limit, replace it. Place the push rod on a flat
surface and measure the clearance between the center
of
the push rod and the flat surface. Replace the push rod
if
the wear limit is exceeded.
Bend
limit:
0.0075
in
(0.19
mm)
TESTING
THE
.
PUSH
ROD
PUSH
RODS
Engines & Generators
22