Arctic Cat 400 Service Manual page 258

Table of Contents
(Servicing Components)
NOTE: Critical engine/transmission specifica-
tions are located at the beginning of this section.
Servicing Top-Side Components ........................ 3-214
Valve Assembly ............................................... 3-214
Piston Assembly ............................................. 3-218
Cylinder/Cylinder Head Assembly ................... 3-220
Servicing Left-Side Components ....................... 3-223
Recoil Starter .................................................. 3-223
Measuring Shift Fork (Thickness) ................... 3-227
Measuring Shift Fork Groove (Width) ............. 3-227
Measuring Shift Fork To Groove
(Side Clearance) .............................................. 3-227
Servicing Right-Side Components ..................... 3-227
Primary Clutch Assembly................................. 3-227
Inspecting Oil Pump ........................................ 3-230
Servicing Center Crankcase Components ......... 3-230
Secondary Gears ............................................ 3-230
Crankshaft Assembly ...................................... 3-231
Driveshaft ........................................................ 3-232
Countershaft .................................................... 3-239
Servicing Top-Side
Components
NOTE: Whenever a part is worn excessively,
cracked, or damaged in any way, replacement is
necessary.
VALVE ASSEMBLY
When servicing valve assembly, inspect valve seats,
valve stems, valve faces, and valve stem ends for
pits, burn marks, or other signs of abnormal wear.
NOTE: Whenever a valve is out of tolerance, it
must be replaced.
Cleaning/Inspecting Valve Cover
NOTE: If the valve cover cannot be trued, the cyl-
inder head assembly must be replaced.
1. Wash the valve cover in parts-cleaning solvent.
Back
3-214
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2. Place the valve cover on the Surface Plate (p/n
0644-016) covered with #400 grit wet-or-dry
sandpaper. Using light pressure, move the valve
cover in a figure eight motion. Inspect the seal-
ing surface for any indication of high spots. A
high spot can be noted by a bright metallic fin-
ish. Correct any high spots before assembly by
continuing to move the valve cover in a figure
eight motion until a uniform bright metallic fin-
ish is attained.
! CAUTION
Do not remove an excessive amount of the sealing
surface or damage to the camshaft will result.
Always check camshaft clearance when resurfacing
the valve cover.
! CAUTION
Water or parts-cleaning solvent must be used in
conjunction with the wet-or-dry sandpaper or dam-
age to the sealing surface may result.
Removing Valves
NOTE: Keep all valves and valve components as
a set. Note the original location of each valve set
for use during installation. Return each valve set to
its original location during installation.
1. Using a valve spring compressor, compress the
valve springs and remove the valve cotters.
Account for an upper spring retainer.
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CC130D
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