Arctic Cat ATV 250 Utility 2009, Руководство по обслуживанию

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3-2
Engine/Transmission
This section has been organized into sub-sections
which show a progression for the complete servicing
of the Arctic Cat ATV engine/transmission.
To service the center crankcase halves, the
engine/transmission must be removed from the frame.
To service top-side, left-side, and right-side compo-
nents, the engine/transmission does not have to be
removed from the frame.
„
NOTE: Arctic Cat recommends the use of new
gaskets, lock nuts, and seals and lubricating all
internal components when servicing the engine/
transmission.
„
NOTE: Some photographs and illustrations used
in this section are used for clarity purposes only
and are not designed to depict actual conditions.
„
NOTE: Critical torque specifications are located
in Section 1.
SPECIAL TOOLS
A number of special tools must be available to the techni-
cian when performing service procedures in this section.
Refer to the current Special Tools Catalog for the appro-
priate tool description.
„
NOTE: Special tools are available from the Arctic
Cat Service Parts Department.
Specifications*
* Specifications subject to change without notice.
Description p/n
Crankcase Separator/Crankshaft Remover 0444-152
Piston Pin Puller 0644-328
Spanner Wrench 0444-192
Flywheel Holder 0444-193
Magneto Rotor Remover 0444-187
Tappet Adjuster 0444-189
Surface Plate 0644-016
Driven Pulley Compressor 0444-195
V Blocks 0644-022
VALVES AND GUIDES
Valve/Tappet Clearance (intake/exhaust)
(cold engine)
0.1 mm
Valve Guide/Stem Clearance (max) (intake)
(exhaust)
0.06 mm
0.08 mm
Valve Spring Free Length (min) (inner)
(outer)
29.4 mm
39.0 mm
Valve Spring Tension @ 18.0 mm (intake) 10.2-11.8 kg
(22.5-26.0 lb)
Valve Spring Tension @ 21.5 mm (exhaust) 19.05-22.0 kg
(42.0-48.5 lb)
CAMSHAFT AND CYLINDER HEAD
Cam Lobe Height (min) (intake)
(exhaust)
34.15 mm
34.05 mm
Rocker Arm/Shaft Clearance (max) 0.1 mm
Cylinder Head/Cover Distortion (max) 0.05 mm
CYLINDER, PISTON, AND RINGS
Piston Skirt/Cylinder Clearance (max) 0.12 mm
Cylinder Bore 72.705-72.715 mm
Piston Diameter 18 mm from Skirt End (max) 72.8 mm
Bore x Stroke 72.7 x 60 mm (Utility)
72.7 x 65.2 mm (DVX)
Cylinder Trueness (max) 0.05 mm
Piston Ring to Groove Clearance (max) (1st/2nd) 0.09 mm
Piston Ring End Gap - Installed (top)
(middle)
(oil)
0.15-0.30 mm
0.30-0.45 mm
0.20-0.70 mm
Piston Pin Bore (max) 17.06 mm
Piston Pin Outside Diameter (min) 16.96 mm
CRANKSHAFT
Connecting Rod (small end inside diameter) (max) 17.06 mm
Connecting Rod (big end side-to-side) 0.05-0.40 mm
Connecting Rod (small end deflection) (max) 1 mm
Crankshaft (web-to-web) 55.15-55.20 mm
Crankshaft Runout (max) 0.1 mm
Oil Pressure at 60°C (140°F) (above)
@ 3000 RPM (below)
0.3 kg/cm² (4.3 psi)
0.7 kg/cm² (10 psi)
TRANSMISSION
Clutch Release Screw 1/8 turn back
Drive Plate (fiber) Thickness (min) 2.4 mm
Drive Plate (fiber) Tab (min) 11 mm
Driven Plate (warpage) (max) 0.1 mm
Clutch Spring Length (min) 27.5 mm
Clutch Wheel Inside Diameter (max) Scuffing of contact
surface
Clutch Shoe Lining Thickness 0.5 mm
Clutch Engagement RPM 2000 ± 200
Clutch Lock-Up RPM 3400 ± 300
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