GUARD AS 5488428 - Caterpillar

Blade Circle and Drawbar
Rotate the blade. Place the blade at an angle of 90 degrees to the frame.
Personal injury or death can result from blade falling.
Lift the blade 10 mm (0.39 inch) off the ground.
Engage the parking brake. Stop the engine.
Illustration 1 g01141116
Remove plate retainer bolts (1) and remove retainer plates (2).
Illustration 2 g01150053
Reinstall two bolts in the drawbar without the retainer plates. Remove the two pusher bolts near the circle drive. Reinstall the pusher bolts into drawbar (7) without the spacers. Refer to Illustration 2 for the correct locations. This ensures that blade circle (6) is properly seated on the circle shoes.
Remove shims (3), spacer plates (4), and drawbar wear strips (5).
Inspect the wear strips. Inspect the drawbar. Measure the thickness of the drawbar wear strips. Replace the wear strips if there is uneven wear. The wear strips should be in complete contact at all points with the blade circle. If any wear strip is not in complete contact with the blade circle, replace the wear strip.
If the wear strips can be reused, switch wear strip (A) with wear strip (C). Switch wear strip (D) with wear strip (F). This will help keep the wear on the wear strips even.
Reinstall the wear strips, spacer plates, and the shims. Install shims until the shims are flush with the top surface of the drawbar.
Remove the two rear bolts separately. Immediately after removing one of the bolts, install the corresponding retainer plate. Install all of the retainer plates and bolts. Note: The shims must not be on the top surface of the drawbar before the retainer plates are installed. The shims must be within the inside of the pocket.
Remove the two pusher bolts from the drawbar. Reinstall the pusher bolts with the spacers.
Illustration 3 g01141311
Measure clearance (X) between the top of blade circle (6) and the bottom of drawbar wear strips (5). Maintain a maximum clearance of 0.5 mm (0.02 inch). Note: Make sure that shoe wear strips (10) are completely seated in circle shoes (9). Shoe mounting fasteners (8) must be tight.Note: After all the adjustments have been performed, the blade circle must rotate freely without binding.
Lubricate the blade circle and the drawbar. Refer to Operation and Maintenance Manual, "Circle Top - Lubricate" for the proper procedure. Circle Pinion and Circle Teeth
Illustration 4 g01141365
Illustration 5 g01141043Note: The engagement of circle pinion (11) and the circle teeth is affected by the adjustment of circle shoes (9).
Rotate the blade. Place the blade at an angle of 90 degrees to the frame.
Lower the blade to the ground.
Apply the service brake as you slowly inch the machine in a forward direction. This will hold a light load between shoe wear strips (10) for the front circle shoes and blade circle (6).
Engage the parking brake. Stop the engine.
Measure clearance (Y) that is between the bottom flange of the circle pinion and the inner machined surface of the blade circle. If the clearance is not within 49.5 to 52.5 mm (1.95 to 2.07 inch), then adjust the clearance.
Illustration 6 g01141357
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