G3508J, G3516J, and G3520J Engines Caterpillar

Camshaft - Remove

Usage:

Removal Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	238-9586	Camshaft Drive Group	1
B	1P-0820	Hydraulic Puller	1
	8B-7548	Push-Puller Tool Group	1
	8B-7559	Adapter	2
	5H-1504	Hard Washer	3
	9U-6600	Hand Hydraulic Pump	1
C	8T-3168	Pilot Assembly	2
C	4J-7945	Bolt	2
D	8T-3167	Guide Assembly	1
E	8T-3169	Crank Assembly	1

Start By:

Remove the rocker shaft assemblies and the pushrods.

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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. Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat^® products. Dispose of all fluids according to local regulations and mandates.

Remove the engine speed/timing sensor. Refer to Testing and Adjusting, "Engine Speed/Timing Sensor".
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Illustration 1 g00579084
Remove access covers (1) from each side of the engine.
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Illustration 2 g00579086

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Illustration 3 g00579090
Push valve lifters (2) away from the camshaft. Hold valve lifters (2) in position with the O-ring seal.
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Illustration 4 g01281295
Remove the bolts and cover (4) from the front housing.
Remove the bolts and cover (3) from the front housing.
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Illustration 5 g01281296
Disconnect harness assembly (X) and remove the bolts from cover (5).
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Illustration 6 g00579522
Remove cover (6) for the camshaft drive gears from the flywheel housing.
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Illustration 7 g00579141
Remove the bolt and plate (7) that fastens camshaft drive gear (8) to the camshaft.
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Illustration 8 g00579142

Place the three washers from Tooling (B) behind plate (7) and install the bolt.

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NOTICE

Do not apply more than 51675 kPa (7500 psi) pressure to the hydraulic puller. The adapters are rated at 6 1/2 tons each and the hydraulic puller is rated at 17 tons at 68900 kPa (10000 psi). If too much pressure is applied, the gear may be damaged.

Install Tooling (B) on camshaft drive gear (8). Apply 51675 kPa (7500 psi) to the puller and hit the screw on the puller with a hammer until camshaft drive gear (8) is free from the camshaft. Remove Tooling (B) and camshaft drive gear (8).
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Illustration 9 g00579144
Remove bolts (9) and thrust washers (10) that fasten the camshaft to the right side of the engine block.
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Illustration 10 g00579145
Remove timing ring (11) from the camshaft on the left side of the engine.
Repeat Steps 7 through 11 for the camshaft drive gear on the left side of the engine.
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Illustration 11 g00579148

Typical example
Install Tooling (C) on each end of the camshaft.
Note: Tooling (D) can be installed on the flywheel housing to remove the camshaft from the rear. Tooling (D) can also be installed on the front housing to remove the camshaft from the front of the engine.
Install Tooling (D) on the flywheel housing.
Install Tooling (E) on the end of Tooling (C).
Note: The camshafts for are two pieces that are bolted together.
The following steps are for G3508 Engines, G3516 Engines, and G3520 Engines.
1. Rotate the camshaft with Tooling (E). Pull the camshaft out of the engine until a suitable lifting device can be attached. Remove front camshaft (12) and rear camshaft (13) as a unit. The camshaft for G3508 Engines has a weight of approximately 42 kg (93 lb). The camshaft for G3516 Engines has a weight of approximately 82 kg (185 lb). The camshaft for G3520 Engines has a weight of approximately 100 kg (220 lb).
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  Illustration 12 g00579149
2. Remove bolts (14). Separate the camshafts and remove spacer (15).
Remove the dowel from the front of the camshaft, if necessary.
Repeat Steps 14 through 18 for the second camshaft.