BASE AS 1838179 - Caterpillar

1. Move the centershift to the farthest position to the right. Remove the bolts, caps (3) and the inserts from centershift cylinder (1) and blade lift cylinders (2). Move the cylinders away from the ballstuds. Replace the caps, inserts and the bolts on the cylinders. Move the cylinder rods into the cylinders.2. Disconnect the oil lines from the centershift cylinder. Remove the bolt that holds the oil lines to the drawbar. Fasten centershift cylinder (1) to the blade lift arm with a strap. 3. Put identification on oil lines (4) as to their location on the blocks. Disconnect oil lines (4). Remove bolts (5) and the lockwashers that hold the drawbar to the front frame. 4. Put identification on oil lines (10) as to their location on the swivel joint. Disconnect oil lines (10). Remove the cotter pin and pin (11) that hold guide (7) to the swivel joint. Remove guide (7). Some models are not equipped with a swivel joint and a guide.5. Remove bolts (8) and the nuts that hold shoes (9) to the drawbar. Remove the shoes and shims (6). Keep the shims with their respective shoes. The 12G has six shoes. The standard equipped 140G or 130G has four shoes. 6. Install tooling (A) under the front of the circle. Put hydraulic jack (13) under the rear of the circle as shown.7. Install two 3/4"-10 NC forged eyebolts in the circle drawbar. Fasten a hoist to the eyebolts and to the circle drawbar bolts.8. Lift the circle drawbar enough to move it away from the front frame and from engagement in the circle.9. Lift the circle drawbar (12) and remove it from the machine. Weight of the 12G drawbar is 1600 lb. (720 kg). Weight of the standard 140G drawbar is 1700 lb. (770 kg). Weight of the standard 130G drawbar is 1200 lb. (540 kg).Install Circle Drawbar
1. Install two 3/4"-10NC forged eyebolts in the drawbar. Fasten a hoist to the eyebolts and to the circle drawbar bolt. Put circle drawbar (1) in position in the front frame and in engagement in the circle.2. Install the bolts and lockwashers that hold cap (3) to the front frame. Connect oil lines (4) to their correct locations on blocks (2). Remove the hoist and the eyebolts from the circle drawbar. 3. Put guide (6) in position under the swivel joint. Install pin (7) that holds guide (6) to swivel joint (8). Install the cotter pin in pin (7).4. Connect four oil lines (10) to their correct locations on swivel joint (8). 5. Put shoes (12) and shims (9) in position under the circle drawbar. Install bolts (11) and the nuts that hold the shoes to the drawbar. Do not tighten the nuts. Make an adjustment of the side clearance of the side and rear shoes with the following procedure: a) Loosen the nuts on setscrews (13).b) Tighten the setscrews until the shoes are against the inside of the circle.c) Loosen the setscrews until the circle