PUMP GP-PISTON & GEAR 1639762 - Caterpillar

start by:a) remove fan drive1. Remove grease tube (1) from the fan drive shaft. 2. Remove three bolts (2) which fasten cover (3) to the hub. Remove the cover and O-ring seal from the hub. 3. Remove marks (state mark) from nut with hammer and punch as shown. Remove nut (4) which holds the hub assembly on the shaft. 4. Install two 3/8" - 16 NC forged eyebolts in the hub. Fasten a hoist and remove the hub and pulley assembly from the bracket and shaft assembly. The weight of the hub and pulley assembly is 80 lb. (36 kg). 5. Remove two spacers (5) from the shaft. 6. Remove locking distortion from nut (6) and remove the nut from the shaft. 7. Press shaft (7) out of bracket (8). 8. Remove bearing (9) from the hub with a hammer and soft punch (brass, wood, etc.). Remove the spacer from the hub. 9. Put the hub and pulley assembly on blocks as a support. Remove the bearing and lip type seal from the hub with tooling (A). 10. Remove six bolts (12) that hold the hub (11) to the pulley (10).Assemble Fan Drive (Later)
Be sure the grease fitting hole in shaft (1) is toward the engine.1. Install the shaft in bracket (2) with a press. Install the shaft until the dimension (X) is 6.90 inches (17.5 cm). Dimension (X) is the distance from the end of the shaft to the machined surface of the bracket.2. Install nut on shaft hand tight against the bracket. The tapered end of the long spacer must be away from the bracket. 3. Install two spacers (3) on shaft.4. Install pulley (5) on hub (4) with six bolts. 5. Install the bearing in the hub with tooling (A).6. Install the lip type seal in the hub with tooling (A). Install the seal with the lip toward the outside of the hub. Put lubrication on the lip with lubricant to be sealed. 7. Install the spacer in the hub. Install bearing (6) in the hub with tooling (A). 8. Install two 3/8" - 16 NC forged eyebolts in the hub. Fasten a hoist and install the hub and pulley assembly on the shaft and bracket assembly. The weight of the hub pulley assembly is 80 lb. (36 kg). 9. Install nut (7) on shaft. Hold the nut on the bracket end of the shaft in a vise. Tighten nut (7) to 600 80 lb.ft. (810 110 N m). Hit nut (7) with a hammer and tighten again to 600 80 lb.ft. (810 110 N m). Make a mark on (stake) the nut on each end of the shaft as shown. 10. Install O-ring seal on cover (8). Install the cover on the hub with three bolts.11. Install the grease tube on the shaft.end by:a) install fan drive