BLD0600 Lafayette 3616 Engine Caterpillar parts 3616 Lafayette
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MARINE ENGINE 3616 Caterpillar
Illustration 2 g01476663
Loosen nuts (3) on ALL rocker arms (4). Unscrew adjusters (2) on all rocker arms (4) until all valves are fully closed. Note: Failure to ensure that all adjusters are fully unscrewed can result in contact between the valves and pistons.
Illustration 3 g01476666
Alignment of timing marks
Mark gear (1) and gear (5) in order to show alignment. Refer to Illustration 3. Note: Identification will ensure that the gears can be installed in the original alignment.
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Remove Tooling (B) and Tooling (C) (not Shown). Remove bolt (7) and washer (6) from camshaft gear (1).
Remove camshaft gear (1) from the camshaft. Note: If the camshaft gear is a tight fit on the nose of the camshaft, use a prybar in order to remove the camshaft gear.
If necessary, remove the key from the nose of the camshaft. Installation Procedure
Tool Part Number Part Description Qty
B 230-6284 Timing Pin (Camshaft) 1
C 230-6283 Timing Pin (Crankshaft) 1
D 9U-7324 Indicator Bracket 1
7H-1942 Dial Indicator 1
3S-3268 Indicator Contact Point 1
7H-1940 Universal Attachment 1
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Ensure that number one piston is at the top center position on the compression stroke. Refer to Systems Operation, Testing and Adjusting, "Finding Top Center Position for No. 1 Piston".
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Install Tooling (C) into Hole (Y) in the cylinder block. Use Tooling (C) in order to lock the crankshaft in the correct position.
Ensure that the camshaft gear and the key are clean and free from wear or damage.
If necessary, install the key into the nose of the camshaft. Note: Ensure that the key is squarely seated.
Illustration 6 g01476666
Alignment of timing marks
Align the keyway in camshaft gear (1) with the key in the camshaft. Install the camshaft gear onto the camshaft. Ensure that the timing marks on gear (1) and gear (5) are in alignment and that the mesh of the gears is correct. Refer to Illustration 6.
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Install Tooling (B) through Hole (X) in camshaft gear (1) into the front housing.
Install washer (6) and bolt (7) to the camshaft gear.
Remove Tooling (B) and (C) (not shown).
Tighten bolt (7) for the camshaft gear. When a 8.8 graded bolt is installed, tighten the bolt to a torque of 95 N m (70.07 lb ft).When a 10.9 graded bolt is installed, tighten the bolt to a torque of 120 N m (88.51 lb ft).
Use Tooling (D) to check the backlash for gear (1) and gear (5). Ensure that the backlash for the gears is within specified values. Refer to Specifications, "Gear Group (Front)" for further information.
Use Tooling (D) to check the end play for camshaft gear (1). Ensure that the end play is within specified values. Refer to Specifications, "Camshaft" for further information.
Lubricate the teeth of the gears with clean engine oil.
Adjust the valve lash. Refer to Systems Operation, Testing and Adjusting, "Engine Valve Lash - Inspect/Adjust". End By:
Install the front cover. Refer to Disassembly and Assembly, "Front Cover