Usage:
Introduction
Single Piece Drop Center Rim.
Caterpillar has introduced the Single Piece Drop Center (SPDC) rims. These rims reduce the risk of incorrect assembly. Since no O-ring seal is required, the possibility of early hour leaks is also reduced. They are identified by a deep well or channel around the rim base.
Caterpillar now has new tire removal tools available for mounting or dismounting the tires on these rims. This publication will show the part numbers and how to use the new tools.
Reference: Caterpillar Tool Guide, Operation & Maintenance Manual.
Necessary Tools
Preparation
1. To simplify following the instructions set forth we recommend laying out the three bars as shown in the photo.
Using paint, (or a suitable substitute) number the bars (1), (2) and (3). Label the ends of the bars A, B, C, D, E and F respectively.
Tire Removal
A. Curved Flange. B. Straight Flange.
- * The Bead Buster® is designed for use with SPDC rims that do not have a curved flange. It should not be used on rims of that type.
1. Remove the valve core from the valve stem. Push a piece of wire down through the valve stem to be sure it is not plugged. Wait until all of the air is out of the tire before proceeding.
2. Lay the tire down flat with the valve stem up.
Using the Bead Buster®
1. Coat the perimeter of the rim/tire joint with a soapy water solution.
2. Place the fingers of the Bead Buster® between the rim and the tire. If the tire has a pry notch it will probably be easier to insert the Bead Buster® at that location, to begin with.
NOTE: It may be necessary to insert a flat tipped pry bar between the tire and rim to allow the fingers of the Bead Buster® to be inserted.
3. Force the fingers of the Bead Buster® between the rim and the tire. This is more easily done by striking the tool at location (G) with a hammer. Be sure the Bead Buster® is fully inserted so that it is against the rim at location H.
4. Using a 1/2" ratchet and a 1 1/4" socket on the head of the Bead Buster®, push downward on the Bead Buster® until it is perpendicular to the rim.
5. Tighten adjuster screw (4) enough to let the locking mechanism hold the tool in a perpendicular position when lever (5) is engaged.
NOTE: Excessive force on the locking mechanism lever is not required to hold the tool in position.
6. With the lever fully engaged, use a 1/2" ratchet (or an air wrench) to turn the hex head. This separates the fingers on the Bead Buster® applying pressure to the bead of the tire.
- * Apply pressure until the tire is approximately 51 mm (2.0") away from the rim.
7. Release the pressure, disengage lever (5), remove and relocate the Bead Buster® about 152 mm (6.0") around the tire perimeter.
- * Repeat Steps 2 through 7, until the tire breaks loose from the rim, all the way around.
8. Turn the tire and rim over and break the bottom bead by repeating Steps 1 through 7.
Removing the Tire from the Rim
1. Turn the tire over so the valve is up.
2. Apply a soapy water solution to the flanges of the rim and the inner diameters of the tire.
3. Pry the tire bead over the rim flange using the end labeled (D) on 1U9350 Lever (3).
4. Insert the end labeled (A) of 1U9351 Lever (1) right next to the lever (3).
5. Remove lever (3). Move it about 120° around the tire and reinsert between the tire and the rim.
6. With lever (1) flat against the rim, press lever (3) downward, to pry the tire up and over the rim flange.
- * Remove lever (1) and reinsert right next to lever (3). Repeat Steps 4 through 6 to pry the tire off the rim.
7. Turn the tire over so the valve is down.
8. Raise the rim so the tire bead is positioned in the rim's center groove as shown.
9. Starting next to the valve insert the end labeled (A) of lever (1). Pry down on the tire and up on the rim.
10. Insert the curved end labeled (F) of 1U9348 Lever (2) between the beadseat and the tire to hook on the rim.
11. Holding lever (1) down, press down on lever (2). Remove lever (1) and insert it next to lever (2). Remove lever (2).
12. Repeat Steps 10 and 11 until the tire is completely removed from the rim.
13. Inspect the rim for damage. Repair or replace as needed.
Installing the tire
1. Thoroughly clean the rim.
2. Lubricate, using 5P3975 Rubber Lubricant, the entire rim base and both tire beads.
3. Place the rim on the ground with the valve stem facing up.
4. Bearing in mind the direction of tire rotation, position the tire on the rim, with the lower bead touching the rim base in the well of the rim.
5. Push the tire on by hand as far as possible.
6. Holding the tire in place, insert the end labeled (A) of lever (1) between the tire and the rim. Hook the end of lever (1) on the rim flange. Push lever (1) to create a place to insert the end labeled (E) on lever (3). Hook the end of lever (3) on the rim flange.
NOTE: Vise grips may be attached to the rim at this point to keep the tire from sliding around the rim, if desired.
7. Push lever (3) to the vertical position easing the tire onto the rim. Remove and reposition lever (1) farther around the perimeter.
- * Repeat Steps 6 and 7 until the lower bead is fully on the rim.
8. Attach vise grips (6) 90° from the valve stem.
9. Position the tire on the rim with the upper bead touching the rim base in the center groove of the rim. Push the upper bead of the tire on by hand as far as possible.
10. Insert the end labeled (A) of lever (1) between the tire and the rim. Hook the end of lever (1) over the rim. Push lever (1) down to the horizontal position.
11. Insert the end labeled (E) of lever (3) between the tire and the rim. Apply enough pressure downward to hold the tire in this position. Remove lever (1).
- * Moving around the tire, repeat Steps 10 and 11 until the tire is completely on the rim.
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Use a self-inflating chuck and stand behind the tread when inflating a tire. Proper inflating equipment, and training in using the equipment, are necessary to avoid overinflating. A tire blowout or rim failure can result from improper or misused equipment. Before inflating tire, install on the machine or put tire in a restraining device. |
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| NOTICE |
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Set the tire inflating equipment regulator at no more than 140 kPa (20 psi) over the recommended tire pressure. |
12. With the valve core removed, use the 7S9394 Air Service Connection Assembly, inflate the tire to the pressure recommended in the Operation & Maintenance Guide.
13. After the tire beads are seated, disconnect the 7S9394 Air Service Connection Assembly and install the valve core. Check the pressure with a tire pressure gauge and inflate the tire to the recommended pressure.