CAT Dragline Marion 1570-W Walking Dragline MECHANICAL Operation And Maintenance Manual

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BI115525

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8E~~l---4 INSIDE CONVEX BUTT WELD

8 3/4" FILLET WELD RACK TO PAD

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1. SWING RACK SECTION 2. LOWER RAIL AND PAD

5. 6. 7. 8.

3. RAMPS 4. BASE

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LEVELING SCREW SHIMS RACK PAD RACK BOLT

SWING RACK SECTION REMOVAL FIGURE 2

REPAIR To replace a roller, frame section or rail section (figure 3), proceed as follows: 1. Move the machine to a safe area with adequate space to perform the repair. 2. Swing the machine so the damaged part is located under roller circle not having an upper rail. Shut down the machine and tag the controls.

NOTE: If an upper rail section is to be replaced, the machine will have to be jacked up slightly to remove it. Contact the BucyrusErie Service Department for the correct procedure.

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3. Remove the roller lube fittings and roller pin retaining bolts. Remove the outer and inner frame splice plate bolts. With a torch, break the weld at the top of the splice plate. Follow all safety rules when using the torch.

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NOTE: The inner and outer frame splice joints are not in line but are staggered. 4. Remove the splice plates and inner and outer frames. With suitable equipment, lift the rollers from the lower rail. Remove the pin and bushings from the roller. 5. With a torch, break the welds securing the chocks to the base top plate. Remove the rail clamps and chock. Remove the rail section. 6. Repair or replace all worn or damaged parts and reassemble in reverse of disassembly. 7. If a new rail section is being installed, the rail section mustbe machined to match the rails on either side. If a new roller is being installed, the roller flange must be machined to match the existing rollers. Refer to appendix for procedure·for matching rollers.

BUCYRUS-ERIE COMPANY, 1984

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