Suzuki LT-A400, Service Manual

Page: 95 / 502

Engine Mechanical: 1D-21
Cylinder Head Cover Relate Parts Inspection
B827H11406041
Refer to “Engine Top Side Disassembly (Page 1D-10)”.
Refer to “Engine Top Side Assembly (Page 1D-13)”
Refer to “Cylinder Head Cover Disassembly and
Assembly (Page 1D-20)”.
Cylinder Head Cover Distortion
1) Remove the cylinder head cover. Refer to “Engine
Top Side Disassembly (Page 1D-10)”.
2) Remove sealant from the mating surface of the
cylinder head cover.
3) Place the cylinder head cover on a surface plate and
check for distortion with the thickness gauge. If the
distortion exceeds the limit, replace the cylinder
head cover.
Special tool
: 09900–20803 (Thickness gauge)
Cylinder head cover distortion
Service limit: 0.05 mm (0.002 in)
4) Reinstall the removed parts.
Rocker Arm Shaft Outside Diameter
1) Remove the rocker arm shafts from the cylinder
head cover. Refer to “Cylinder Head Cover
Disassembly and Assembly (Page 1D-20)”.
2) Measure each rocker arm shaft out side diameter
using the micrometer. If the diameter exceeds the
limit, replace the rocker arm shaft with a new one.
Special tool
: 09900–20205 (Micrometer (0 – 25 mm))
Rocker arm shaft O.D. (IN & EX)
Standard: 11.973 – 11.984 mm (0.4714 – 0.4718 in)
3) Reinstall the removed parts.
Rocker Arm Inspection
When checking the rocker arm, the inside diameter of
the rocker arm and wear of the camshaft contacting
surface should be checked.
1) Remove the cylinder head cover from the cylinder
head. Refer to “Engine Top Side Disassembly
(Page 1D-10)”.
2) Remove the rocker arms from the cylinder head
cover. Refer to “Cylinder Head Cover Disassembly
and Assembly (Page 1D-20)”.
3) Install each rocker arm inside diameter using the dial
caliper.
Special tool
: 09900–20605 (Dial calipers (1/100 mm, 10
– 34 mm))
Rocker arm I.D. (IN & EX)
Standard: 12.000 – 12.018 mm (0.4724 – 0.4731
in)
4) Visually inspect the camshaft contacting surface. If
the diameter exceeds the limit or any damage is
found, replace the rocker arm with a new one.
5) Reinstall the removed parts.
I827H1140045-01
I827H1140047-01
I827H1140048-01