C7.1 Marine Engine Caterpillar

Camshaft Gear - Remove and Install

Usage:

C7.1 JME

Removal Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A⁽¹⁾	9U-6198	Crankshaft Turning Tool	1
A⁽²⁾	9U-7336	Housing	1
A⁽²⁾	5P-7305	Engine Turning Tool	1
B	298-5564	T40 Torx Socket	1
C	230-6284	Timing Pin (Camshaft)	1
D	364-9107	Fuel Injection Pump Timing Pin	1
E	367-8608	Engine Timing Pin	1
F	9U-7324	Indicator Bracket	1
	7H-1942	Dial Indicator	1
	3S-3268	Indicator Contact Point	1
	7H-1940	Universal Attachment	1

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⁽¹⁾	The Crankshaft Turning Tool is used on the front pulley.
⁽²⁾	This Tool is used in the aperture for the electric starting motor.

Start By:

Remove the valve mechanism cover.
Remove the front cover.

Note: Either Tooling (A) can be used. Use the Tooling that is most suitable.

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NOTICE

Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life.

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NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Dispose of all fluids according to local regulations and mandates.

Use Tooling (A) to rotate the crankshaft so that number one piston is at top dead center on the compression stroke. Refer to System Operation, Testing and Adjusting, "Finding Top Center Position for No.1 Piston".
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Illustration 1 g02009113

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Illustration 2 g02009114
Install Tooling (C) through Hole (X) in camshaft gear (1) into the front housing. Use Tooling (C) to locate the camshaft in the correct position.
Remove plug (3) from the cylinder block. Remove O-ring seal (2) from the plug.
Install Tooling (E) into Hole (Y) in the cylinder block. Use Tooling (E) to lock the crankshaft in the correct position.
Note: Do not use excessive force to install Tooling (E). Do not use Tooling (E) to hold the crankshaft during repairs.
Use Tooling (D) to lock the fuel injection pump gear in the correct position. Refer to Disassembly and Assembly, "Fuel Injection Pump - Remove" for the correct procedure.
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Illustration 3 g02009115
Use Tooling (B) to loosen threaded inserts (4) on all rocker arms (5). Unscrew threaded inserts (4) on all rocker arms (5) until all valves are fully closed.
Note: Ensure that all threaded inserts are fully unscrewed.
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Illustration 4 g02009116

Alignment of timing marks
Mark gear (1), gear (6), gear (7) and gear (8) to show alignment. Refer to Illustration 4.
Note: Identification will ensure that the gears can be installed in the original alignment.
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Illustration 5 g02009117
Remove Tooling (C), Tooling (D), and Tooling (E).
Remove bolt (10) and washer (9) 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

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NOTICE

Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life.

Ensure that number one piston is at top dead center on the compression stroke. Refer to System Operation, Testing and Adjusting, "Finding Top Center for No. 1 Piston" for the correct procedure.
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Illustration 6 g02009353
Ensure that Tooling (E) is installed in Hole (Y) in the cylinder block. Use Tooling (E) to lock the crankshaft in the correct position. Refer to System Operation, Testing and Adjusting, "Finding Top Center Position for No.1 Piston" for the correct procedure.
Use Tooling (D) to lock the fuel injection pump gear in the correct position. Refer to Disassembly and Assembly, "Fuel Injection Pump - Install" for the correct procedure.
Ensure that the camshaft gear and the key are clean and free from wear and damage.
If necessary, install the key into the nose of the camshaft.
Note: Ensure that the key is squarely seated.
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Illustration 7 g02009113

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Illustration 8 g02009116

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), gear (6), gear (7) and gear (8) are in alignment. Refer to Illustration 8.
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Illustration 9 g02352702

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Illustration 10 g02352694
Install Tooling (C) through Hole (X) in the camshaft gear into the front housing.
Install washer (9) and bolt (10) to camshaft gear (1).
Remove Tooling (E), Tooling (D), and Tooling (C).
When a 8.8 Graded bolt (10) is installed. Tighten the bolt to a torque of 95 N·m (70 lb ft).
When a 10.9 Graded bolt (10) is installed. Tighten the bolt to a torque of 120 N·m (89 lb ft).
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Illustration 11 g02009114
Install a new O-ring seal (2) to plug (3). Install the plug into Hole (Y) in the cylinder block. Refer to Illustration 11. Tighten plug (3) to a torque of 21 N·m (186 lb in).
Use Tooling (F) to measure the backlash for gear (1), gear (6), gear (7) and gear (8). Refer to Specifications, "Gear Group (Front)" for further information.
Use Tooling (F) to measure the end play of camshaft gear (1). Refer to Specifications, "Camshaft" for further information.
Lubricate the teeth of the gears with clean engine oil.
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Illustration 12 g02009115
Use Tooling (B) to tighten threaded inserts (4) on all rocker arms (5). Tighten the threaded inserts to a torque of 30 N·m (266 lb in).
Note: When the threaded insert is tightened, the threaded insert must be seated correctly into the cup for the pushrod.