- Load Haul Dump:
- R1700G (S/N: SBR1-UP)
- R2900G (S/N: JLK1-UP)
Introduction
A shroud system is available for underground mining R1700G and R2900G loaders which provide hammerless, mechanically attached components instead of a weld-on system. Complete welding and mounting instructions can be found in Special Instruction, REHS5250, "Installation Procedure For the New Mechanically Attached Shrouds". The following is an abbreviated version for proper mounting, maintenance, and removal of the components on existing modified base edges.
Shroud Installation and Maintenance Procedure
- The shroud assembly consists of six components. These six components are listed in Illustration 1.
Before installing or replacing shrouds, dismantle and clean each pin block assembly. Ensure that the bore, thread, and capscrew, are liberally coated with Loctite 76764 Silver Grade Anti-Seize.
Note: Items (2), (3), (4), and (5) are all components of 317-7948 Screw Pin As .
Note: The parts needed to fit the various buckets are listed in IRM PELJ1184.
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| Illustration 1 | g03336834 |
Shroud assembly (1) Shroud (2) Piston (3) Pin Block (4) Spacer (5) Cap Screw (6) Boss | |
- Insert piston (2) back into the bore of the pin block (3). Place the assembly behind the rear face of the boss as shown. The piston end of the pin block should now be facing forward toward the boss.
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| Illustration 2 | g03336903 |
(2) Piston (3) Pin Block | |
- Slide the rear of the shroud over the boss and push home. Ensure that the highlighted faces contact the corresponding faces on the lip.
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| Illustration 3 | g03336904 |
- Insert spacer (4) downward into the cavity in the top leg of the shroud as shown.
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| Illustration 4 | g03336905 |
- Insert the capscrew through the arch at the rear of the shroud. Then through the hole in the spacer until the screw engages the thread in the pin block. Turn the screw clockwise to tighten. Use a torque wrench and tighten capscrew (5) to 475 N·m (350 lb ft).
Check shroud tightness daily for the first week of service. Time intervals between checks can be increased after this time, as the shrouds will settle into the lip. Tightness checks should be performed by gripping the shroud blade with both hands, and lifting the shroud up and down. Do not test shroud tightness with a torque wrench.
If retensioning is required, first dislodge the fines in the head of the capscrew using a power washer. Then, retension the cap screw to 475 N·m (350 lb ft).
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| Illustration 5 | g03336908 |
Shroud Removal Procedure
- Shrouds are ready to be changed when wear indicators (W) on the base of the shrouds become visible, as shown. A power washer should be used to remove any build-up of fines from around the cap screw and pin assembly areas.
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| Illustration 6 | g03336926 |
(W) Wear indicators | |
- Ensure that fines are removed from head of cap screw (5). Using a wrench with a 19 mm (3/4 inch) socket, turn the cap screw counter clockwise to remove the capscrew from the pin assembly.
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| Illustration 7 | g03336927 |
- Insert a pry bar into the cavity on the underside of the spacer.
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| Illustration 8 | g03336930 |
(PB) Prybar | |
- Rotate the prybar down as shown to lever the spacer upward. Remove the spacer from the shroud.
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| Illustration 9 | g03336931 |
- The shroud can then be removed from the lip in the direction indicated by the arrow.
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| Illustration 10 | g03336933 |
- The pin block can now be removed from the lip. Following removal of all components, wash down the lip using a power washer. Ensure that the lip profile is clean and ready for installation of the replacement shrouds.
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| Illustration 11 | g03336934 |