HER CHEE 2002 ATV-320 S, Руководство по обслуживанию

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Chapter 1 Engine, Transmission & Gear
I-21
Cylinder/Piston/Crankshaft Service Information
GENERAL
。
It is recommended to remove the engine from frame body for cylinder and piston service.
。
If the crankshaft bearing, oil pump drive sprocket or timing sprocket need to replacement, the
crankshaft assembly must be replaced.
SPECIFICAIONS
ITEM STANDARD mm (in) SERVICE LIMIT mm (in)
I.D.
76.000-76.010 (2.9921-2.9925) 76.10 (2.9960)
Warpage
--- 0.05 (0.002)
Taper
--- 0.05 (0.002)
Cylinder
Out-of-round
--- 0.05 (0.002)
Top
0.015-0.050 (0.0006-0.0020) 0.09 (0.004)
Ring-to-groove
clearance Second
0.015-0.050 (0.0006-0.0020) 0.09 (0.004)
Top
0.15-0.35 (0.006-0.014) 0.05 (0.002)
Second 0.15-0.35 (0.006-0.014) 0.05 (0.002)
Ring end gap
Oil (Side rail)
0.2-0.7 (0.01-0.03) ---
Piston O.D.
75.985-76.000 (2.9915-2.9921) 75.90 (2.9882)
Piston-to-cylinder clearance
0.010-0.040 (0.0004-0.0016) 0.10 (0.004)
Piston,
Piston
ring
Piston pin bore
17.002-17.008 (0.6694-0.6696) 17.04 (0.671)
Piston pin O.D.
16.994-17.000 (0.6691-0.6693) 16.96 (0.668)
Piston-to-piston ring clearance
0.002-0.014 (0.0001-0.0006) 0.02 (0.001)
Connecting rod small end I.D.
17.016-17.034 (0.6699-0.6706) 17.06 (0.672)
Connecting rod big end side clearance
0.05-0.4 (0.002-0.016) 0.6 (0.02)
Connecting rod big end radial clearance
0-0.008 (0-0.0004) 0.05 (0.002)
Crankshaft runout --- 0.10 (0.004)
TORQUE VALUES
Cam chain adjuster base bolt 8 – 12 N.m (6 – 9 ft.lb)
Cylinder stud bolt 7 – 11 N.m (5 – 8 ft.lb)
Troubleshooting
Low compression or uneven compression
◦ Worn cylinder or piston rings
Excessive smoke
◦ Worn cylinder, piston or piston rings
◦ Improperly installed piston rings
◦ Damaged piston or cylinder
Overheating
◦ Excessive carbon build-up on piston
◦ Blocked or restricted flow of coolant
◦ Sticking thermostat
Knocking or abnormal noise
◦ Worn piston and cylinder
◦ Excessive carbon build-up on piston head