0316504 JOHNSON GEAR, Reverse

Typical Example1. Remove cover (1) and covers (2).
Typical Example2. Remove louver (3) and cover (4).
Typical Example
Typical Example3. Put a piece of cardboard (5) between stator (6) and rotor assembly (7). This step is necessary to prevent damage to the rotor assembly and stator when the generator fan is disconnected from the flywheel housing.
Typical Example4. Loosen three bolts and nuts (8) on the front engine support.
Typical Example5. Remove the bolts that hold the generator in place on the base. G3412 Engines do not have mounts, sleeves or collars. G3412 Engines have four bolts that hold the generator set to the base.6. Fasten a strap (9) and Tool (A) to the generator as shown. Fasten a chain to the lifting bracket on the front of the generator.7. Lift the generator and the rear of the engine enough to install blocks (10) under the flywheel housing. Lower the generator and engine until the weight of the engine is on blocks (10).
Typical Example8. Remove bolts (12) that hold fan (13) against the flywheel housing. Remove bolts (11) that hold the generator housing against the flywheel housing.9. Remove the generator from the engine. The weight of the generator is approximately 1134 kg (2500 lb).
Typical Example10. Remove bolts (14) and plates (15).
Typical Example11. Remove fan (16) and shims (17).Install Generator
Typical Example1. Put fan (1) in position in the generator housing. Make sure holes (2) are toward the outside as shown.2. Install a 1/2 -10 NC × 101 mm (4 in) Long Guide Bolt (4) in the generator hub.3. Check the thickness of the plates that are installed over shims (3). The thickness of shims (3) and the plates must be 12.116 0.406 mm (.4770 .1600 in). Add or subtract shims (3) to get the correct thickness.
Typical Example5. Install plates (5) on the hub. Remove the guide bolt and install the bolts that hold the shims and plates in position.
Typical Example6. Remove the cover from the flywheel housing and install Tool (B).
Typical Example G3412 Engines do not have mounts (8).7. Install a 5/8 -11 NC × 101 mm (4 in) Long Guide Bolt in the flywheel.8. Fasten Tool (A) and straps (6) to the generator as shown. Fasten a chain to the lifting bracket on the generator. Put generator (7) in place on the engine. The weight of the generator is approximately 1133 kg (2500 lb). Use Tool (B), if necessary, to put the guide bolt in the flywheel housing in alignment with the holes in the plates and fan on the generator.
Typical Example9. Install bolts (10) that hold fan (9) in position on the flywheel. Remove the guide bolt and install the bolt.10. Install the bolts that hold the generator housing to the flywheel housing.
Typical Example11. Lift the generator and engine enough to remove blocks (11). Lower the generator and engine down on to mounts (8).12. Install the four bolts that hold the generator in place on the base.
Typical Example13. Tighten bolts (17) on the engine front support.
Typical Example14. Remove cardboard (18) from between the rotor assembly and the stator.
Typical Example15. Install louver (19) and cover (20).