Operation And Service Of 6V4946 Roller End Collar Puller{0600} Caterpillar

Operation And Service Of 6V4946 Roller End Collar Puller{0600}

Usage:

Introduction

THE 6V4946 END COLLAR PULLER HAS BEEN DESIGNED TO ACT AS A PERIPHERAL PIECE OF SERVICE EQUIPMENT TO A ROLLER/IDLER REBUILDER.

THE PURPOSE OF THE UNIT IS TO PROVIDE A QUICK METHOD OF INSPECTING ROLLERS TO DETERMINE IF SEALS AND BUSHINGS ARE WITHIN ACCEPTABLE WEAR LIMITS BEFORE THE WELDING SEQUENCE IS ENGAGED.

THIS UNIT ENABLES THE OPERATOR TO INSPECT THE SEALS OF WORN ROLLERS WAITING TO BE REBUILT WHILE THE WELDING UNIT IS IN OPERATION.

Installation/Maintenance

Installation

The End Collar Puller is shipped with the standard accessory items packed within the frame cavity. After checking to be certain that the equipment was not damaged during shipment, locate the unit so that it fits into the repair shop's work flow system.

In Order To Put The End Collar Puller Into Service:

NOTE: THE ILLUSTRATION SHOWS A POSSIBLE WORK FLOW SYSTEM WHICH INCLUDES THE ROLLER BUFFER AND THE DIP TANK. YOUR WORK FLOW SHOULD BE SET UP TO SATISFY YOUR SPECIAL NEEDS.

1. Level the unit using the adjustment bolts on the legs.

2. Connect your power supply to the mounting table (item 36 on page 7). Attach properly rated hydraulic hoses from the power supply to the ports on the cylinder.

3. Have a qualified electrician make the proper electrical hookup to the power supply.

4. Fill the power supply reservoir with the lubricant recommended by the power unit manufacturer. Extend and retract the ram to clear air from the system and then top off the reservoir.

5. Place a container on the shelf under the drain plug to act as a catch pan for oil from the disassembled rollers.

Maintenance

1. Lube the worm gear on the screw jack once a week.

2. Keep the sliding block bearing plates greased.

3. Replace the hydraulic oil as necessary.

Operational Instructions

Pre-Welding Inspection Of Crawler Tractor Rollers

Pre-Cleaning Of Parts:

1. Rollers coming in to the rebuild shop from the field will normally be covered with hardpacked dirt. Before any other operation is performed on them, they must undergo a cleaning process to remove the major portion of dirt and grit.

2. Once the rollers have been pre-cleaned, they should be placed in the Roller Buffer to remove the fine particles of dirt from the critical areas (running surfaces) on the roller shell.

End Collar Removal:

1. Place the roller on the worktable. Use an overhead jib assembly with an appropriate lifting device to place the roller on the sliding worktable.

2. Remove the retaining rings from the end collars.

3. Slide the roller towards the cylinder and adjust the cylinder height until it is centered on the roller shaft.

4. Using the tool identification chart on page 15, pick the appropriate hub puller arms and locking pins and attach them to the mounting blocks on either side of the cylinder assembly.

5. Slip the open ends of the puller arms over the holes in the end collar and secure with the properly sized pins.

NOTE: ON SMALLER SIZED ROLLERS, USE THE RAM EXTENSION (P.N. 72140000) TO AVOID SCUFFING THE CYLINDER RAM ON THE I.D. OF THE END COLLAR SHAFT.

Show/hide table

KEEP HANDS CLEAR OF THE PRESSING AREA WHEN THE RAM IS IN OPERATION.

6. Extend the ram (making sure that the ram and roller shaft are centered) until the end collar pulls free of the roller shell and shaft assembly.

7. Once the collar has been freed, retract the ram, disengage the puller arms and rotate the table so that the second end collar may be removed with the same pressing sequence.

8. Remove the seals.

9. Check the clearance between the bushings and the shaft O.D.

A. If clearance is less than required, remove the roller and its components from the End Coller Puller and send it to the Roller/Idler Press for complete disassembly. The Roller's bushings should now be honed to achieve the required minimum clearance. After honing, reassemble the roller components and send it to the Roller/Idler Rebuilder.

B. If clearance is more than required, continue with step No. 10.

10. Inspect the shaft O-Rings and Seal Assemblies. Replace all defective components.

End Collar Replacement:

1. If the roller seals are still useable or, if the proper replacements have been installed, the end collars can be reassembled on the roller shell and shaft.

2. Using the tool identification chart on page 15, pick the appropriate pusher tool and slide it into the hole of the pressing ram.

3. With the appropriate locking pins, secure the end collar cap to the pushing tool.

4. Doublecheck the vertical adjustment of the ram assembly to be certain that the end collar is in alignment with the roller shell for a proper fit.

Show/hide table

KEEP HANDS CLEAR OF THE PRESSING AREA WHEN THE RAM IS IN OPERATION.

5. Extend the ram until the end collar slips over the shaft assembly. Stop the ram advancement when the end collar is in its original "assembled" position. DO NOT EXCEED 2000 P.S.I. FOR REASSEMBLY.

6. Install the end collar retaining ring.

7. Relieve cylinder pressure and remove the locking pins.

8. Retract the ram, turn the worktable and replace the second end collar using the sequence stated above.

9. Install the second retaining ring.

10. Remove the roller from the End Collar Puller as it is ready to be rebuilt.