MAINTENANCE GUIDE ULTRAEDGE LHD LIP SHROUD SYSTEM INSTALLATION, MAINTENANCE AND REMOVAL INSTRUCTIONS

Transcription

1 MAINTENANCE GUIDE ULTRAEDGE LHD LIP SHROUD SYSTEM INSTALLATION, MAINTENANCE AND REMOVAL INSTRUCTIONS

2 Safety General Safety Information The safety practices described in this manual are meant as guidelines for safe operation under most conditions and are meant to supplement any safety rules and/or laws that have been established at your worksite. WARNING: Read this entire brochure prior to conducting the procedures described in this manual. Failure to follow these instructions could result in injury or death. Signal Words Throughout this manual are statements preceded by a special attention symbol:. The symbol is used with the following signal words to attract your attention to information regarding safety issues. WARNING: Indicates a hazardous situation which, if not avoided, could result in serious injury or death. CAUTION: Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury. NOTICE--DAMAGE ALERT: Indicates information that should be acted upon to avoid significant equipment or machine damage that could result in unplanned downtime or maintenance. Additional signal words that are not preceded by the attention symbol are: IMPORTANT: Indicates information that possesses special significance to the described procedures. Tip: Indicates information that may simplify the procedures or make your job easier. Personal Safety WARNING: When performing the work described in these instructions, use proper personal protection equipment to help avoid injury. Always wear hard hat, gloves, safety shoes, eye protection, hearing protection and fall protection that complies with regional, national and worksite requirements (e.g., OSHA, MSHA) when working with this equipment. To avoid injury to bystanders, keep them a safe distance from the work area. WARNING: The practices described are meant as guidelines for safe operation under most conditions and are meant to supplement any safety rules and/or laws that may be in force in your area. Your safety and the safety of others results from putting into practice your knowledge of the correct operating procedures. Ensure welds are applied by competent welders using good welding practices. Ensure that operators and bystanders are well clear of the load during lifting operations.

3 Table of Contents 1. Installation 1.1. Preparing the Machine and Bucket for Work...Page Preparing the Lip...Page Positioning Nut...Page Positioning Shroud on Lip...Page Aligning Threads with Lip Holes...Page Installing Bolts...Page Tightening Bolts...Page Supplemental Steps...Page 8 2. Maintenance 2.1. Preparing the Machine and Bucket for Work...Page Checking and Tightening the Bolts...Page Checking Shrouds and Bolts for Loosening...Page Checking Shrouds for Wear...Page 9 3. Removal 3.1. Preparing the Machine and Bucket for Work...Page Cleaning Out Bolt Head...Page Removing Bolts...Page 10

4 1. Installation 1.1 Component Preparation 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. 4. Shroud nuts are delivered with top and bottom dust covers. Remove and discard before installing the shroud. 1.2 Prepare Lip 1. If needed, remove old shrouds. Top 2. Clean lip top, bottom, front, and counterbores completely of debris with needle scaler and wire brush to bare metal. See Figure and Figure Figure Lip Leading Edge 3. Inspect lip and correct for uneven surfaces in the fit contact regions that may prevent the shroud from seating on the lip. Figure Lip Bottom WARNING: Unsecured equipment may move by external impact force or accidental machine position change. When working around the bucket, ensure that the bucket is blocked against motion and the machine is isolated, locked and tagged in accordance with worksite requirements. 4

5 1.3 Pre-position Nut to About If the optimal rotation of the nuts is known from a previous shroud installation then rotate the nuts to that orientation; If not, leave the nuts rotated about 45. See Figure Figure Nuts Angled at Position Shroud on Lip 1. Shroud must have full contact on leading edge. See Figure Shroud must have contact along bottom surface. See Figure Contact Figure Shroud Placement on Lip WARNING: When inspecting shroud, ensure that the shroud is positioned against motion. 5

6 1.5 Align Threads with Lip Holes 1. Adjust nut rotation to align threads with lip hole by rotating the nut with a Hex Bit inserted from the top of the lip. 2. Shroud position may have to be adjusted sideways to achieve proper alignment. See Figure Figure Aligning Threads with Lip Holes 1.6 Install Bolts 1. Lubricate bolts with anti-seize compound. 2. Insert bolt and washer and tighten lightly by hand or with small ratchet and 46mm socket. See Figure Contact Figure Installing Bolts Tip: If the condition of the bolt binds or does not thread easily on the nut, insert a 19mm Hex Bit into the nut from the bottom of the shroud and hold breaker bar firmly during bolt assembly. See Figure Figure Hex Bit Placement 6

7 1.7 Tighten Bolt 1. Tighten bolts to 1,000 ft/lb. See Figure Figure Bolt Tightening 2. Check to ensure that the shroud is in solid contact with the front of the lip. See Figure Contact Figure Shroud and lip contact 3. Repeat tightening process for the remaining bolts in each shroud. Tighten in the order shown. See Figure Figure Bolts Tightening Patterns Tip: Using a brass or copper hammer jolt each bolt head 3 times to help settle the shroud and fasteners then retighten to 1,000 ft/lbs. See Figure Figure Settling shroud 7

8 1.8 Supplemental Steps If using an impact wrench to perform the installation or if you encounter conditions where the bolts are not easily threaded you can follow these additional steps. 1. With the bolt only hand tight, insert 19 mm Hex Bit into the nut from the bottom of the shroud. See Figure Figure Hex Bit inserted into nut 2. Rotate the nut with the Hex Bit and breaker bar from the bottom of the shroud clockwise when looking down on the shroud to pull the shroud back firmly to the lip. See Figure Figure Hex Bit rotation 3. Relax the nut approximately 1/8 th turn to eliminate any binding or loading of the bolt on the lip hole. See Figure Figure /8 th turn to relax bolt 4. Hold Hex Bit firmly to eliminate motion of the nut and tighten bolt until it is firmly seated. See Figure Figure Bolt placement 8

9 2. Maintenance 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 Figure Example of Wear Indicators 9

10 3. Removal 3.1 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. 3.2 Clean Out Bolt Head 1. Remove fines from around bolt head. See Figure Secure shroud against movement. Figure Removing Fines 3.3 Remove Bolts 1. Remove bolts using a 46mm socket and impact wrench. See Figure Figure Removing Bolts. 10

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