1999/12/20 Caterpillar

Change to Tightening Procedure for Cylinder Head Bolts in Disassembly and Assembly, RENR1223 and Disassembly and Assembly, SENR5184 {1100}

Usage:

65E 1GM

Engines: for Caterpillar Built Machines 3196 (S/N: 6AR1-UP) 3176C (S/N: 7ZR1-UP; 5DZ1-UP)

Service Manual Module, SENR5184-00, "Disassembly and Assembly", Page 64, "3176C Engine". This module is found in Service Manual, SENR5180.Service Manual Module, RENR1223-02, "Disassembly and Assembly", Page 55, "3176C and 3196 Engines For Caterpillar Built Machines". This module is found in the following service manuals:

Service Manual, RENR1708, "Lexion 480, 485 Combines".
Service Manual, RENR1900, "345B L Excavators"
Service Manual, RENR1960, "365B L Excavators"
Service Manual, RENR1980, "345B L Excavators"
Service Manual, SENR1745, "Challenger 65E, 75E, 85E, 95E Ag Tractors"
Service Manual, SENR1925, "345B L Excavators"
Service Manual, SENR9445, "Challenger 65D, 75D, 85D Ag Tractors"

In the "Cylinder Head - Install" section, the procedure for tightening the cylinder head bolts has been changed. Refer to the following procedure in order to tighten the cylinder head bolts.

Lubricate the following components with 6V-4876 Lubricant : the bolt threads, the underside of the bolt heads and the washers. Install the cylinder head bolts and the washers.

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Illustration 1	g00517501

Note: There are currently two types of cylinder head bolts that are being used. The first type is a full shank design that is shown in Illustration 2. The second type is a reduced shank design that is shown in Illustration 3.

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Illustration 2	g00661561
Cylinder head bolt with full shank design Dimension (A) for the full shank design is the following amount: 15.73 mm (0.619 inch)

Tighten the cylinder head bolts with the full shank design according to the following procedure:
1. Tighten bolt (1) through bolt (26) in a numerical sequence to a torque of 150 ± 15 N·m (110 ± 11 lb ft).
1. Tighten bolt (1) through bolt (26) again in a numerical sequence to a torque of 150 ± 15 N·m (110 ± 11 lb ft).
1. Place an index mark on bolt (1) through bolt (26). Rotate bolt (1) through bolt (26) in a numerical sequence for an additional 90 degrees (1/4 turn).
1. Loosen bolt (1) through bolt (26) until the washers are loose under the bolt heads.
1. Tighten bolt (1) through bolt (26) in a numerical sequence to a torque of 150 ± 15 N·m (110 ± 11 lb ft).
1. Tighten bolt (1) through bolt (26) again in a numerical sequence to a torque of 150 ± 15 N·m (110 ± 11 lb ft).
1. Place an index mark on bolt (1) through bolt (26). Rotate bolt (1) through bolt (26) in a numerical sequence for an additional 90 degrees (1/4 turn).
1. Tighten bolt (27) through bolt (33) in a numerical sequence to a torque of 28 ± 7 N·m (20 ± 5 lb ft).

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Illustration 3	g00661562
Cylinder head bolt with reduced shank design Dimension (B) for the reduced shank design is the following amount: 14.58 mm (0.574 inch)

Tighten the cylinder head bolts with the reduced shank design according to the following procedure:
1. Tighten bolt (1) through bolt (26) in a numerical sequence to a torque of 160 ± 15 N·m (120 ± 11 lb ft).
1. Tighten bolt (1) through bolt (26) again in a numerical sequence to a torque of 160 ± 15 N·m (120 ± 11 lb ft).
1. Place an index mark on bolt (1) through bolt (26). Rotate bolt (1) through bolt (26) in a numerical sequence for an additional 90 degrees (1/4 turn).
1. Loosen bolt (1) through bolt (26) until the washers are loose under the bolt heads.
1. Tighten bolt (1) through bolt (26) in a numerical sequence to a torque of 160 ± 15 N·m (120 ± 11 lb ft).
1. Tighten bolt (1) through bolt (26) again in a numerical sequence to a torque of 160 ± 15 N·m (120 ± 11 lb ft).
1. Place an index mark on bolt (1) through bolt (26). Rotate bolt (1) through bolt (26) in a numerical sequence for an additional 90 degrees (1/4 turn).
1. Tighten bolt (27) through bolt (33) in a numerical sequence to a torque of 28 ± 7 N·m (20 ± 5 lb ft).