HUSABERG FE 450 AUS, Руководство по ремонту

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30/ENGINE - WORK ON THE INDIVIDUAL PARTS
121
» If the piston pin shows severe discoloration/signs of wear:
–
Replace the piston pin.
–
Place the piston pin in the connecting rod and check the seating for play.
» If the piston pin seating has excessive play:
–
Replace the connecting rod and piston pin.
300356-10
–
Measure the pistons at the piston skirt, perpendicular to the piston pin.
Guideline
Piston - diameter (All 450 models)
Size I 94.93… 94.95 mm (3.7374…
3.7382 in)
Size II 94.95… 94.97 mm (3.7382…
3.739 in)
Piston - diameter (All 570 models)
Size I 99.95… 99.96 mm (3.935…
3.9354 in)
Size II 99.96… 99.97 mm (3.9354…
3.9358 in)
Info
Piston dimensions

are marked on the piston head.
19.20
Checking the piston ring end gap
300357-10
–
Remove the piston ring from the piston.
–
Place the piston ring in the cylinder and align with the piston.
Guideline
Below the upper edge of the cylinder 10 mm (0.39 in)
–
Measure the end gap with a feeler gauge

.
Guideline
Piston ring - end gap
Compression ring
≤
1.00 mm (
≤
0.0394 in)
Oil scraper ring
≤
1.20 mm (
≤
0.0472 in)
» If the end gap is greater than the specified measurement:
–
Check/measure the cylinder. ( p. 120)
» If cylinder wear lies within the specified tolerance:
–
Replace the piston ring.
–
Mount the piston ring with the marking facing toward the piston head.
19.21
Piston/cylinder - determining the mounting clearance
–
Check/measure the cylinder. ( p. 120)
–
Check/measure the piston. ( p. 120)
–
The smallest piston/cylinder mounting clearance equals the smallest cylinder bore diameter minus the largest piston diameter. The
largest piston/cylinder mounting clearance equals the largest cylinder bore diameter minus the smallest piston diameter.
Guideline
Piston/cylinder - mounting clearance (All 450 models)
Size I 0.040… 0.082 mm (0.00157… 0.00323 in)
Size II 0.042… 0.075 mm (0.00165… 0.00295 in)
Wear limit 0.120 mm (0.00472 in)
Piston/cylinder - mounting clearance (All 570 models)
Size I 0.040… 0.062 mm (0.00157… 0.00244 in)
Size II 0.042… 0.065 mm (0.00165… 0.00256 in)
Wear limit 0.120 mm (0.00472 in)