PIN AS 2938091 - Caterpillar

start by:a) separation of main frames 1. Remove the lower pivot pin bearings from the rear frame as follows:a) Remove spacer (1) from upper cap (2).b) Remove the bolts to remove lower cap (3), upper cap (2) and the shim from the rear frame. c) Remove the lip type seals (4) from upper cap (2) and the lower cap. d) Use tooling (A) to pull the two bearings out of the rear frame. 2. Remove the middle pivot pin bearing from the rear frame as follows: a) See Remove Steering Control Valve to remove the steering control valve.b) Install tooling (B) and pull the bearing out of the rear frame. 3. Use tooling (C) to pull the upper pivot pin bearing from the rear frame. 4. Remove the upper pivot pin bearing seals (5) from each side of the front frame. 5. Pull the upper pivot pin bearing from the front frame with tooling (D).Install Pivot Pin Bearings
1. Use tooling (A) and install the upper pivot pin bearing in the front frame. Install the bearing until it is in the center of its bore or .56 .02 in. (14.22 0.51 mm) from the top surface of the frame. 2. Use tool group (B) and install the seals in each side of the front frame until they make contact with the bearing. Make sure the lip of the seal is toward the outside of the frame as shown. 3. Install the seal in upper cap (1) for the lower pivot pin bearings with tool group (C). Install the seal until it makes contact with the counterbore in the cap and with the lip of the seal toward inside of the cap.4. Install the seal in the lower cap for the lower pivot pin bearings with tool group (C). Install the seal until it makes contact with the counterbore in the cap and with the lip of the seal toward outside of the cap. 5. Put lower bearing cap (2) in position and install three of the bolts to hold it the same distance apart.6. Lower the temperature of the lower bearing cup to -100°F 10°F (-73.3°C -23.3°C). Use tool group (C) and install the bearing cup until it makes contact with cap (2).7. Put clean oil on the two bearing cones and install them in the lower pivot pin bore.8. Lower the temperature of the upper bearing cup to -100°F 10°F (-73.3°C -23.3°C). Use tool group (C) and install the bearing cup until it makes light contact with the upper bearing cone. 9. Remove the three lower bearing cap bolts and install upper cap (1) and the shim. Install three bolts the same distance apart to hold caps (1) and (2).10. Connect tooling (D) to the bearing cones. Check the amount of torque needed to turn the bearing cones. Remove or install shims under cap (1) until the following torque is needed to turn the bearing cones: 920-20 to 75 lb.in. (2.3 to