3500 Generator Set Engines Caterpillar


Gear Group (Rear)

Usage:

3508 1ZF


Illustration 1g03113536


Illustration 2g03113537

Table 1
Specification for 116-9856 Rear Gear Gp 
Item  Qty  Part  Specification Description 
7E-3897 Camshaft Drive Gear  Before assembly, clean the taper of the camshaft and the tapered bore of the camshaft drive gear with lint free cloth saturated with cleaning solvent to remove excess oil. Clean with alcohol wipe.  
112-1554 Idler Gear As  Bore of 125-9751 Bushing after installation is 81.060 ± 0.010 mm (3.1913 ± 0.0004 inch)
Installation depth is 1.00 ± 0.25 mm (0.039 ± 0.010 inch).
107-2477 Idler Gear As  Bore of 4P-5438 Bushing after installation is 75.060 ± 0.010 mm (2.9551 ± 0.0004 inch)
Installation depth is 1.50 ± 0.50 mm (0.059 ± 0.020 inch).
The mark on the cluster idler gear (3) must be in alignment with the mark on the crankshaft gear (5). 
9X-8887 Bolt  Use the following procedure to tighten the bolt for the camshaft drive gears: 
1. Tighten the bolt for the camshaft drive gear to 360 ± 40 N·m (266 ± 30 lb ft).
2. Mark a vertical line on the head of the bolt for the camshaft drive gear. Refer to Illustration 2.
3. Place a driver against the retaining plate of the camshaft drive gear. Strike the driver solidly with a hammer 3 to 4 times.
4. Again, tighten the bolt for the camshaft drive gear to 360 ± 40 N·m (266 ± 30 lb ft).
5. Repeat Step 3 and Step 4 until the mark on the bolt turns a minimum of 90 degrees. Refer to Illustration 2.
112-1552 Idler Shaft  Diameter is 81.000 ± 0.010 mm (3.1890 ± 0.0004 inch)
1B-4367 Bolt  Torque to 240 ± 20 N·m (177 ± 15 lb ft)
4P-5437 Gear Shaft  Diameter is 74.990 ± 0.010 mm (2.9524 ± 0.0004 inch)
10  8M-2530 Bolt  Torque to 140 ± 10 N·m (103 ± 7 lb ft)
11  8S-2331 Bolt  Torque to 240 ± 20 N·m (177 ± 15 lb ft)
12  101-1368 Thrust Washer  Thickness is 1.90 ± 0.10 mm (0.075 ± 0.004 inch)

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