C13, C15, and C18 Tier 4 Final Engines Gear Group (Front) Caterpillar


Gear Group (Front)
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Illustration 1g03512477


Illustration 2g03512521
Cam gear tightening sequence

Table 1
Specification for 358-6884 Front Gear Gp 
Item  Qty  Part  Specification Description 
031-3185 Bolt  Tighten the bolt in a numerical sequence 1,4,2,5,3,6,1,4 as shown in Illustration 2 to 240 ± 40 N·m (177 ± 30 lb ft).  
0S-1571 Bolt  Torque to 66 ± 6 N·m (49 ± 4 lb ft)
Before tightening the bolts for the stub shaft, set distance (B) between the centers of camshaft gear and gear assembly with a gauge in order to obtain the gear backlash of 0.216 ± 0.114 mm (0.0085 ± 0.0045 inch)
5P-4142 Locking Bolt  Torque to 55 ± 10 N·m (41 ± 7 lb ft)
10  9S-8752 Full Nut  Refer to the following procedure when nut is loosened for service:

1. Remove the nut.
2. Clean the nut with a wire brush.
3. Apply blue Loctite 242 to the threads before assembly.
4. Tighten nut to 55 ± 10 N·m (41 ± 7 lb ft)
10  126-1756 Locking Bolt  Refer to the following procedure when any bolt is loosened for service:

1. Remove the bolt.
2. Clean bolt with a wire brush.
3. Apply blue Loctite 242 to the threads before assembly.
A new bolt with a previously applied thread lock is acceptable for use.
4. Tighten bolt to 30 ± 7 N·m (266 ± 62 lb in)
6I-3624 Thrust Plate  Install the oil groove of the thrust plate toward the face of gear assembly.
Thickness is 4.00 ± 0.25 mm (0.157 ± 0.009 inch)
0S-1571 Bolt  Torque to 55 ± 10 N·m (41 ± 7 lb ft)


Illustration 3g03512582


Illustration 4g03512616
Stub shaft tightening sequence

Table 2
Item  Qty  Part  Specification Description 
102-5861 Thrust Plate  Thickness is 5.000 ± 0.025 mm (0.1968 ± 0.0009 inch)
117-8801 O-Ring Seal  Before assembly, lubricate the bore lightly with 50/50 mixture of 8T-2998 Lubricant and clean engine oil. 
10  352-9728 Gear As  After installation, bore in the 128-2661 Bushing is 63.566 ± 0.013 mm (2.5026 ± 0.0005 inch).
Installation depth is 2.8 ± 0.5 mm (0.11 ± 0.02 inch)
11  2J-3118 Locking Bolt  Tighten the bolt in a numerical sequence 1, 3, 4, 5, 2, 1, 2, 3, 4, 5, 1 as shown in the Illustration 4 to 55 ± 10 N·m (41 ± 7 lb ft).
Refer to the following procedure when any bolt is loosened for service:

1. Remove the bolt.
2. Clean bolt with a wire brush.
3. Apply blue Loctite 242 to the threads before assembly.
A new bolt with a previously applied thread lock is acceptable for use.
4. Tighten bolt to 55 ± 10 N·m (41 ± 7 lb ft)
12  112-9217 Thrust Plate  Install the oil groove of the thrust plate toward the face of gear assembly.
Thickness is 4.00 ± 0.25 mm (0.157 ± 0.009 inch)
13  197-4971 Stub Shaft  Lubricate the gear journals, bearing bores and thrust faces with engine oil. 
14  130-4701 Gear As  Lubricate the gear journals, bearing bores and thrust faces with engine oil.
Outside diameter of the 130-4698 Bushing is 56.030 ± 0.013 mm (2.2059 ± 0.0005 inch).
Thickness of the bushing is 2.500 ± 0.013 mm (0.0984 ± 0.0005 inch).
Installation depth is 2.5 ± 0.5 mm (0.09 ± 0.02 inch).  
15  151-5966 Stub Shaft As  Lubricate the gear journals, bearing bores and thrust faces with engine oil.
Diameter is 50.800 ± 0.013 mm (2.0000 ± 0.0005 inch).
Extension of 6I-3623 Dowel is 4.5 ± 0.5 mm (0.18 ± 0.02 inch)
16  6I-3625 Gear As  Lubricate the gear journals, bearing bores and thrust faces with engine oil.
Outside diameter of the 101-8468 Bushing is 56.030 ± 0.013 mm (2.2059 ± 0.0005 inch).
Thickness of the bushing is 2.500 ± 0.013 mm (0.0984 ± 0.0005 inch).
Installation depth is 1.5 ± 0.5 mm (0.06 ± 0.02 inch)
17  158-3416 Stub Shaft  Lubricate the gear journals, bearing bores and thrust faces with engine oil.
Diameter is 50.800 ± 0.013 mm (2.0000 ± 0.0005 inch)

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