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Maintenance Manual for Crawler Crane
4.4 Explanation of maintenance interval
The maintenance interval means that the crane maintenance work is carried out at regular
intervals.
The maintenance interval can be determined by:
a) Operating time of crane component (in hours)
b) Calendar time (date, month and year) when the crane is in operation and storage
Generally speaking, the maintenance intervals are determined by the operating time of crane
components. In special condition, the maintenance intervals are determined by the crane
working and storage time.
The maintenance intervals can be determined by the operating hours of engine which can be
read from the main screen in the cab.
Table 4-1 Maintenance intervals
Classification Operating hours of engine Maintenance interval
Daily inspection (D) 5
Every day, before startup of
crane
Weekly inspection (W) About 25 Weekly
Monthly maintenance (M1) About 100 Monthly
Quarterly maintenance (M3) About 250 Every 3 months
Semiannual maintenance (M6) About 500 Every 6 months
Annual maintenance (M12) About 1000 Yearly
4-7
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