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5 Maintenance
5.1 50-hours check
50-hours check
One-time operations to be carried out after a test run or after the first 10 to 50 operating hours of the cylin-
der head (with a new engine, after installation of new cylinder heads, after component maintenance or ex-
tended component maintenance).
When installing a cylinder head with run-in mating faces (e.g. after piston replacement), a repeated check
after the first 50 operating hours is not necessary.
Qualifi-
Interval
cation
[h]
[a]
QL1
-
-
Table 37: 50-hours check
54 | Maintenance | MS150121/02E 2017-09
Item
Valve gear
Maintenance tasks
Check valve clearance (→ Page 180)
Task
-
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