4421 1999 REV -
Page 27
4.5 Regular Maintenance Schedule
The following checks are a guide to the frequency with which the machine should be inspected when in
regular use. If it has been standing idle for some time all points need to be checked out before re-com-
mencing work.
a]
Dollies:
The dollies in the drive cap should be checked at regular intervals throughout the day. Once a
gauge on their life expectancy in particular conditions is established, the planned hours between
changes can be estimated. (Refer to section 4.6)
b]
Daily:
or every 10 - 12 hours use.
1. Generally inspect the bolted connections on the hammer .
2. Check for oil leaks.
3. Check electrical cables for damage.
4. Inspect lifting tackle for wear and tear.
5. During operation of the hammer, check that the control box sensor indicators are functioning
correctly. These are useful in assisting fault diagnosis.
c]
Weekly:
or every 60 hours use.
Carry out Daily checks 1-6 above.
Visually check over the hammer for signs of wear and tear, damage or cracks on welded
structures.
Check condition of hammer vibration damper.
Check dropweight connection. In particular that the fixings that secure the connecting rod in
place.
d]
Monthly:
or every 250 hrs use
1. Carry out the Daily/Weekly checks above.
2. Check accumulator gas pressures.
3. Check condition and serviceability of hydraulic hoses.
e]
3 Monthly:
or every 750 hrs use
1. Visually check the top cover of the dropweight is tight and secure by checking the special
nuts and bottom nuts are tight on the cover bolts.
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