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7.4 Maintenance Procedures
7.4.1 Inspection Before Operation
[CHECKING BEFORE STARTING ENGINE]
Check the following in this section without starting the engine and before starting the first work every
day.
[1] CHECKING BOOM AND FRAME
• Check each part of the boom and frame for cracks, excessive deformation, contamination and other
damage. In addition, check bolts, nuts and pins for any looseness, drop, damage and other matters. If
you find any abnormality, repair.
[2] CHECKING SEARCHER HOOK FIX BOLTS
If any damage found on searcher hook fix bolt, please exchange it to new one right away.
Breakage of bolt cause searcher hook to fall off.
• Check if there is crack, damage, or squash on screw thread on screw part of bolt.
If crack, damage or squash on screw thread is found, change the bolt to new one even if it is earlier
than expected bolt life.
[3] CHECKING ELECTRICAL WIRING (FUSE BOX) FOR DAMAGE
If fuses are blown frequently or if you find the trace of a short circuit created in the electrical
wiring, be sure to find the cause and fix the problem.
1. Turn the fuse holders on control panel counterclockwise and
take tubular fuses out.
2. Check the fuse for damage and meltdown and if the fuse of the
specified capacity is being used.
3. If a fuse has melted down or the trace of an open/short circuit
is found in the electrical wiring, ask us or our sales service
agency for repair.