3116 and 3126 Truck Engines Gear Group (Front) – Remove

Removal Procedure

Start By:

A.Remove the crankshaft vibration damper. Refer to Disassembly and Assembly, “Vibration Damper and Pulley – Remove and Install”.
B.Remove the crankshaft front seal. Refer to Disassembly and Assembly, “Crankshaft Front Seal – Remove”.
C.Remove the camshaft. Refer to Disassembly and Assembly, “Camshaft – Remove”.
D.Remove the front housing. Refer to Disassembly and Assembly, “Housing (Front) – Remove”.
Note: For information on reusability of the camshaft idler gear, refer to Guideline For Reusable Parts And Salvage Operations, SEBF8045, “Timing Gears for All Engines”.

1.Place the engine at the Top Center position. The timing marks should be in line with the crankshaft gear.

2.Identify the type of idler gear on the engine. Remove bolts (1) that hold the idler gear to the block. Remove plate (7) .


3.Identify the location of timing marks (4) and (5) on the camshaft idler gear. Identify the location of timing mark (6) on the crankshaft drive gear.

4.Remove idler shaft (3) and camshaft idler gear (2). Separate idler gear (2) from idler shaft (3) and remove the sleeve bearing from the camshaft idler gear.

5.Use Tooling (A) and a press to remove the bearing.

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