3508C, 3512C and 3516C Marine Engines Gear Group (Rear) - Install Caterpillar

Installation Procedure

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Illustration 1	g06321170

1. Position crankshaft gear (13) and install 12 bolts (12).
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   Illustration 2	g06321167

2. Position gear shaft (11) and install four bolts (10).

   1. Tighten four bolts (10) to a torque of 140 ± 10 N·m (105 ± 5 lb ft).
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   Illustration 3	g06321151

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   Illustration 4	g06321204
   (7) Camshaft Idler Gear. (9) Bearing. (E) 81.060 ± 0.010 mm (3.1913 ± 0.0004 inch). (F) 1.00 ± 0.25 mm (0.040 ± 0.010 inch).

3. Use Tooling (A) and a suitable press to install the bearings in camshaft idler gears (7). Install bearing (9) into gear (7) to Depth (F), as shown.
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   Illustration 5	g06321198

4. Place clean engine oil on the bearings and install idler shafts (6).

5. Machine the inside diameter of bearing (9) to Dimension (E), as shown.

   Note: The surface finish of Bore (E) must be 0.8 micrometers. Pitch Diameter (H) must be concentric with a total indicator reading of 0.12 mm (0.005 inch). Surface (G) of gear (4) must be square with Bore (E) within 0.05 mm (0.002 inch).

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   Illustration 6	g06321208

6. Place clean engine oil on the thrust washer (8) and install.
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   Illustration 7	g06259470

7. Position gears (7) with idler shafts (6) into place and install six bolts (5).

   Tighten six bolts (5) to a torque of 240 ± 20 N·m (177 ± 14.8 lb ft).

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   Illustration 8	g06321213
   (3) Cluster Idler Gear. (4) Bearing. (A) 75.060 ± 0.010 mm (2.9551 ± 0.0004 inch). (B) 1.5 ± 0.5 mm (0.06 ± 0.02 inch).

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   Illustration 9	g06321115

8. Use Tooling (A) and a suitable press to install bearing (4) in cluster gear (3). Install bearing (4) to Depth (B), as shown.
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   Illustration 10	g06259447

   Note: When you install the rear cluster gear assembly to the crank gear, there are no timing marks on the 3516 engines.

9. Put clean engine oil on the bearing and install the gear assembly on the shaft. Make sure that the marks on the gear assembly and the crankshaft are in alignment with the rotation of the engine, as shown.

10. Place clean engine oil on gear (3) and install gear (3) onto shaft (11).

11. Install plate (2) and four bolts (1).

End By:

1. Remove the flywheel housing.

2. Remove the crankshaft rear seal and wear sleeve.