74191 Force SCREW (.312-18 x 3.250)

1. Remove cover (1). Steps 2 through 4 are for 3408 Generator Sets only.2. Disconnect oil line (2) from the bottom of the turbocharger. Remove oil line (2) and adapter (4) from the flywheel housing. Remove two plugs (3). 3. Remove the cover from the flywheel housing and install tool (A). Use tool (A) to turn the flywheel until the "V" marks on the front camshaft gear and the idler gear are in alignment. It is necessary to put the "V" marks in alignment on the 3408 Generator Sets so that when the camshaft is installed, the pin in the end of the camshaft is in alignment with the hole in rear camshaft gear (5).4. Install tooling (B) as shown. Remove the four bolts that hold rear camshaft gear (5) on the camshaft. Tighten tooling (B) to disconnect rear camshaft gear (5) from the camshaft. Steps 5 through 7 are for 3412 Generator Sets only.5. Disconnect oil line (6) from the bottom of the turbocharger.6. Remove oil line (6) and elbow (7) from the flywheel housing. Remove two studs (8) that hold elbow (7) on the flywheel housing. 7. Use tool (A) to turn the flywheel enough so that three of four bolts (10) can be removed from rear camshaft gear (9). Install tooling (C) as shown. Remove the last bolt that holds rear camshaft gear (9) in place on the camshaft. Tighten tooling (C) to disconnect rear camshaft gear (9) from the camshaft. 8. Remove two bolts (11) and plate (12) that holds the camshaft in position in the cylinder block.
Be careful not to cause damage to the camshaft bearings when the camshaft is removed.
9. Remove camshaft (13) from the engine. 10. Use tooling (D) and a press to remove front camshaft gear (14) from the camshaft.Install camshaft
Make sure the key for gear (1) is in position on camshaft (2) before gear (1) is installed.1. Heat gear (1) to a maximum temperature of 315°C (600°F). Install gear (1) on camshaft (2). Step 2 is for 3408 Generator Sets only. The 3412 Generator Sets do not have pin (3).2. Install pin (3). Install the pin so it extends 8.76 0.25 mm (.345 .010 in.) above the surface.
Do not let 2P2506 Anti-Seize Compound get on the bearing journals on the camshaft.
3. Put 2P2506 Anti-Seize Compound on the lobes on camshaft (2). Put clean engine oil on the camshaft journals. Step 4 is for 3412 Generator Sets only.4. Turn the crankshaft so that the "V" mark on idler gear (4) is toward the bore for the camshaft.5. Install camshaft (2) in the engine. 6. Make sure "V" mark (5) on the camshaft gear is in alignment with "V" mark (6) on the idler gear. 7. Install plate (7) and the two bolts that hold the camshaft in position in the engine. Steps 8 through 12 are for 3412 Generator Sets only.8. Use tool (B) if necessary to put the bolt holes in rear camshaft gear (8) in alignment with the holes in the camshaft.9. Install one bolt (9) to hold rear camshaft gear (8) on the camshaft. Remove tooling (A). Tighten bolt (9) to a torque of 27 4 N m (20 3 lb.ft.).10. Use tool (B) to turn the flywheel so the three other bolts can be installed in rear camshaft gear (8). Tighten these bolts to a torque of 27 4 N m (20 3 lb.ft.). 11. Put 9S3263 Thread Lock on two studs (12). Install the two studs in the flywheel housing.12. Make sure the gasket is in position between oil line (10) and the bottom of the turbocharger. Make sure the gasket is in position between elbow (11) and the flywheel housing. Install oil line (10) and elbow (11). Steps 13 through 16 are for 3408 Generator Sets only.13. Install the four bolts that hold rear camshaft gear (13) in position on the camshaft. Remove tooling (C).14. Tighten the four bolts that hold rear camshaft gear (13) in place to a torque of 27 4 N m (20 3 lb.ft.). 15. Make sure the gasket is in position between oil line (14) and the bottom of the turbocharger. Make sure the gasket is in position between adapter (16) and the flywheel housing. Install oil line (14) and adapter (16).16. Install two plugs (15).17. Check the camshaft end play with tooling (D). The end play must be 0.10 to 0.25 mm (.004 to .010 in.). 18. Install cover (17).END BY:a) install valve lifters and push rodsb) install timing gear cover