HOUSING-MOTOR 4523518 - Caterpillar

Illustration 3 g03662706
Typical example
Mark gears (1), (2) and (3) in order to show alignment. Refer to Illustration 3. Note: Identification will ensure that the gears can be installed in the original alignment.
Remove fuel pump gear (3). Refer to Disassembly and Assembly, "Fuel Pump Gear - Remove" for the correct procedure.
Remove camshaft gear (1). Refer to Disassembly and Assembly, "Camshaft Gear - Remove and Install".
Remove idler gear (2). Refer to Disassembly and Assembly, "Idler Gear - Remove and Install". Installation Procedure
Table 2
Required Tools
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".
Illustration 4 g03662720
Typical example
If necessary, install Tooling (C) into hole (Y) in the front housing. Use Tooling (C) in order to lock the crankshaft in the correct position. Refer to Systems Operation, Testing and Adjusting, "Finding Top Centre Position for No.1 Piston". Note: Do not use excessive force to install Tooling (C). Do not use Tooling (C) to hold the crankshaft during repairs.
Ensure that all of the components of the front gear group are clean and free from wear of damage. If necessary, replace any components that are worn or damaged.
Illustration 5 g01269928
Typical example
Install camshaft gear (1). Loosely install bolt (6) and washer (5). Refer to Disassembly and Assembly, "Camshaft Gear - Remove and Install" for more information.
Install Tooling (B) through hole (X) in camshaft gear (1) into the front housing.
Illustration 6 g01269927
Typical example
Illustration 7 g03662706
Alignment of timing marks
Install idler gear (2). Ensure that the timing marks on gears (1) and (2) are in alignment and that the mesh of the gears is correct. Refer to Disassembly and Assembly, "Idler Gear - Remove and Install". Check the end play of the idler gear. Refer to Specifications, "Gear Group (Front)" and refer to Disassembly and Assembly, "Idler Gear - Remove and Install" for further information.
Remove Tooling (B) and (C).
Illustration 8 g01984554
Identification of the bolt Grade.
Tighten bolt (6) for the camshaft gear. When a 8.8 Graded bolt (6) is installed. Tighten the bolt to a torque of 95 N m (70 lb ft).When a 10.9 Graded bolt (6) is installed. Tighten the bolt to a torque of 120 N m (88.51 lb ft).
Check the end play of the camshaft gear. Refer to Specifications, "Camshaft" for more information. Install Tooling (B) through hole (X) in camshaft gear (1) into the front housing and install Tooling (C) into hole (Y) in the front housing.
Install fuel injection pump gear (3). Refer to Disassembly and Assembly, "Fuel Injection Pump Gear - Install" for the correct procedure. Ensure that timing marks on gears (2) and (3) are in alignment. See Illustration 7. Ensure that the mesh of the gears is