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2.1 Prepare the Machine and Bucket for Work
1. The machine and bucket must be blocked against hazardous motion.
2. The machine and bucket must be positioned and oriented to provide safe access to perform the work described
below. Before performing any work, a risk assessment in accordance with worksite requirements must be performed
to identify potential hazards, and establish safe procedures for completing the necessary tasks.
3. Energy and machinery isolation – Isolate, lock, tag, release energy and test for dead.
2.2 After 8 Hours, Check and Tighten Bolts
1. Clean out around bolt head with needle scaler or similar tool.
2. Using a brass hammer jolt each bolt head three times to help settle the shroud, nut and bolt.
3. Tighten all bolts with torque wrench to 1,000 ft/lb.
4. Some bolt rotation is expected since there can be some settling of the system
2.3 Check Shrouds and Bolts for Loosening
1. Using a brass hammer, jolt each shroud and check for loosening. Look for movement around the bolts
and shroud to lip interface areas.
2. Visually check each bolt to see if it shows any indications of backing out.
3. If any loosening is detected by visual inspection or by impact, the bolts should be retightened.
2.4 Check Shrouds for Wear
1. Look at bottom surface of each shroud to see if wear indicators are visible. The dimples should become visible
when there is approximately 10% wear life remaining as shown in
Figure 2.4.1.
2. Maintenance
Figure 2.4.1 – Example of Wear Indicators
