3406E and 3456 Generator Set Engines Caterpillar


Gear Group (Front) - Install

Usage:

MTC855 818

Installation Procedure

Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
B     9S-3263     Thread Lock Compound     1    
C     8T-2998     Lubricant     1    


NOTICE

Keep all parts clean from contaminants.

Contaminants may cause rapid wear and shortened component life.


  1. Thoroughly clean the gasket material from the cylinder block and both sides of plate (19) .



    Illustration 1g00576241

    Typical example

  1. Install a new gasket (25) on the cylinder block.



    Illustration 2g00596260

    Typical example

  1. Install plate (23) and bolts (24) .

  1. Tighten bolts (24) to 55 ± 10 N·m (41 ± 7 lb ft).

  1. Tighten bolts (24) to 55 ± 10 N·m (41 ± 7 lb ft) again.

  1. Install shaft assembly (20). Apply Tooling (B) to the studs and the bolt for the shaft assembly. Tighten the nuts and the bolt for the shaft assembly to a torque of 55 ± 10 N·m (41 ± 7 lb ft).

  1. Hand tighten the nuts and the bolt for shaft assembly (20) to a torque of 55 ± 10 N·m (41 ± 7 lb ft) again.

    Note: The backlash for the camshaft gear and the adjustable idler gear will need to be readjusted if shaft assembly (19) has been removed, loosened, or moved in any way. The camshaft gear must be installed and the adjustable idler gear must be removed in order to perform the backlash adjustment procedure. Refer to Testing and Adjusting, "Fuel System".

  1. Install shaft assembly (19). Do not tighten the nuts and the bolt for shaft assembly (19) at this time. The nuts and the bolt for shaft assembly (19) will need to be tightened when the backlash is adjusted.



    Illustration 3g00537659

    Bolt tightening sequence for shaft (21)

  1. Apply Tooling (B) to bolts (22). Install shaft (21). Tighten bolts (22) to a torque of 55 ± 10 N·m (41 ± 7 lb ft) in a sequence (1, 3, 4, 5, 2, 1, 2, 3, 4, 5, 1).



    Illustration 4g00596255

    Typical example




    Illustration 5g00516404

    Typical example

  1. Put cluster gear (15) on shaft (21). Ensure that timing Marks (V) are aligned on cluster gear and the crankshaft gear. Apply Tooling (B) to bolts (17). Install plate (17) and bolts (16). Tighten bolts (16) to a torque of 30 ± 7 N·m (22 ± 5 lb ft).



    Illustration 6g00596214

    Typical example

  1. Put idler gear (11) on shaft (20). Apply Tooling (B) to bolts (12). Install plate (13) with the oil groove toward the gear face. Install bolts (12) and tighten to a torque of 30 ± 7 N·m (22 ± 5 lb ft).



    Illustration 7g00596172

    Typical example

    Note: Skip Step 12 if shaft assembly (19) has been removed, loosened, or moved in any way. The backlash for the camshaft gear and the adjustable idler gear will need to be readjusted. The camshaft gear must be installed and the adjustable idler gear must be removed in order to perform the backlash adjustment procedure. Refer to Testing and Adjusting, "Fuel System".

  1. Put adjustable idler gear (7) on shaft assembly (19). Apply Tooling (B) to bolts (8). Install plate (9) and bolts (8). Tighten bolts (8) to a torque of 30 ± 7 N·m (22 ± 5 lb ft).



    Illustration 8g00576240



    Illustration 9g00576839

    Typical example

  1. Install O-ring seals (5) and (6) in seal assembly (3). Lightly lubricate the O-ring seal (5) with a 50/50 mixture of Tooling (C) and clean engine oil.

  1. Assemble thrust plate (1) and seal assembly (3). Apply Tooling (B) to bolts (2). Hold the assembly in position and install bolts (2). Evenly tighten bolts (2) until seal assembly (3) and O-ring seal (5) are seated against the cylinder head.

    Note: Be careful in order to ensure that O-ring seal (5) stays in the groove in seal assembly (3) .

  1. Install adapter (4). Ensure that the dowel in adapter (4) engages the hole in the camshaft.

  1. Adjust the backlash for the camshaft gear and the adjustable idler gear, if necessary. Refer to Testing and Adjusting, "Fuel System".

    Note: The camshaft gear must be installed and the adjustable idler gear must be removed in order to perform the backlash adjustment procedure.

End By: Install the front housing. Refer to Disassembly and Assembly, "Housing (Front) - Install".

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