PISTON 1177238 - Caterpillar

Remove Hydra Mechanical Shutoff Drive
Start By:a. remove hydra mechanical shutoff controlb. remove tachometer drive 1. Remove tube assemblies (1) and (2) from the shutoff drive housing assembly and the engine.2. Remove the bolts and remove shutoff drive housing assembly (3) from the flywheel housing. 3. Use Tool (A) to remove snap ring (5) and the washer from the end of drive gear (4). Remove drive gear (4) from the housing assembly.4. If necessary, remove dowels (6) from the housing assembly. 5. Remove bearing (9) and seal (7) from the housing assembly. The bearing can be used to push the seal out of the bore.6. Remove two bearings (8) from the drive gear bore.7. If necessary, remove dowels (10) from the housing assembly. 8. Remove gear assembly (11) from the end of the crankshaft.Install Hydra Mechanical Shutoff Drive
1. If necessary, make a replacement of dowels (1) in gear assembly (2). The dowels must extend 9.5 0.5 mm (.37 .02 in) from the gear. Put gear assembly (2) in position on the end of the camshaft and install the bolts to hold it. Tighten the bolts evenly to a torque of 100 15 N m (75 10 lb ft). Hit the gear assembly with a hammer and tighten the bolts again to the same torque. Do this until the torque does not change. 2. If dowels (5) were removed, install the new dowels until they extend 6.0 0.5 mm (.27 .02 in) from the housing assembly.3. Use Tooling (A) to install two bearings (4) in the drive gear bore until they are 1.5 5.0 mm (.06 .02 in) from the ends of the bore.4. Put drive gear (3) in position in the housing assembly. 5. Put washer (8) in position and use Tool (B) to install snap ring (7) to hold the washer and drive gear in position.6. Use Tooling (A) to install bearing (6) in the housing assembly until it is 26.0 1.0 mm (1.02 .04 in) below surface (X). Use Tooling (A) and install seal (10) to the bottom of the bore. Make sure the lip of the seal is toward the engine as shown and put clean engine oil on the lip.7. If dowels (9) were removed, install the new dowels until they extend 6.0 0.5 mm (.24 .02 in) from the housing. 8. Install shutoff drive housing assembly (13) and the bolts to hold it on the flywheel housing. Make sure the teeth of drive gear (3) are correctly engaged with the teeth of gear assembly (2).9. Install tube assemblies (11) and (12) on the housing assembly and the engine.End By:a. install tachometer driveb. install hydra mechanical shutoff control