Rato R80, Maintenance Manual, Page: 12 / 79

Part I Introduction
8
Piston pin-piston pinhole clearance 0.004-0.016mm 0.08mm
Piston ring
Piston ring side clearance: top
ring/ring 2
Oil ring
Piston ring closing clearance top ring
Ring 2
Scraping ring
Piston ring width: top ring / ring 2
Oil ring
0.025-0.06mm
--
0.20-0.40mm
0.30-0.50mm
0.2-0.7mm
2.8-3.0mm
2.45-2.75mm
0.15mm
--
1.0mm
1.0 mm
1.0mm
1.37mm
2.0mm
Connecting
rod
Inner diameter of small end
Inner diameter of big end
Small end oil film clearance
Big end side clearance
15.011-15.022mm
33.025-33.039mm
0.013-0.03mm
0.25-0.65mm
15.27mm
33.07mm
0.12mm
1.0mm
Crankshaft Outer diameter of main journal 32.975-32.985mm 32.92mm
Valve
Valve clearance
Outer diameter of
valve stem
Conduit inner
diameter
Valve stem clearance
Valve seat contact
width
Free length of spring
Intake
Exhaust
Intake
Exhaust
Intake/ex
haust
Intake
Exhaust
0.10-0.15mm
0.15-0.20mm
5.468-5.48mm
5.43-5.445mm
5.485-5.5mm
0.005-0.032mm
0.04-0.07mm
0.8-1.0mm
38.5-39.5mm
--
--
5.34mm
5.3mm
5.56mm
0.10mm
0.12mm
2.0mm
37.5mm
Camshaft
Cam height Intake
Exhaust
6.045mm
5.766mm
5.95mm
5.65mm