TUBE AS 3598881 - Caterpillar

Image1.3.1
Image1.3.2
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Group Number 2
Rework Procedure
Group 2: Engines with #1 Flywheel Housing
Notes:
*See Group 2 affected units
*Only failed risers should be replaced. If the riser on only one side has failed, only order the parts listed for that side in the "Parts Needed" section.
*See rework procedure below for failures of the riser on the right of the engine. Please note that the rework procedure for a left side failure follows the procedure for the right side failure.
Refer to the appropriate Service Manual as Necessary.
RIGHT SIDE
Parts Needed for Right Side Repair:
Image2.1.1
Procedure:
1. Remove Turbocharger. See Turbocharger Removal Procedure, SENR5031.
2. Drain the engine coolant. Refer to Operation and Maintenance Manual, "Refill Capacities and Recommendations".
3. Remove water tube (1), existing 4P-8252 Exhaust Riser, and existing riser support bracket. Exhaust riser and support bracket are not reused. See Image 2.2.1.
4. Replace the 4P-8252 Riser Assembly and support brackets with the new 292-2971 Riser Assembly (2), 292-5555 Support Bracket (3), and 284-7633 Support Bracket (4). Refer to Images 2.2.1 and 2.2.2.
a) Refer to Image 2.2.2. New 0S-1591 Bolts, 9X-6458 Washers, and 293-3286 Spacers are used between riser support brackets (5). 9S-8752 Nuts are reused in this location.
b) New 9X-6458 Washers are used between the support bracket and exhaust riser (6). 0S-1594 bolts are reused in this location.
c) New 0L-2070 Bolts, 2Y-9255 Spacer, and 229-5332 Gasket are used at exhaust manifold flange (7). 108-3612 Spacers should be removed and 2Y-9255 Spacer should be used on the top bolt of the 3-bolt flange. 5M-2894 Washers and 9S-8752 Nuts are reused in this location.
Image2.2.1
Image2.2.2
LEFT SIDE
Parts Needed: See attached Image 2.3.1
Procedure:
1. Remove Turbocharger. See Turbocharger Removal Procedure, SENR5031.
2. Drain the engine coolant. Refer to Operation and Maintenance Manual, "Refill Capacities and Recommendations".
3. Remove water tube (1), existing 4P-8251 Exhaust Riser, and existing riser support bracket. Exhaust riser and support bracket are not reused. See Image 2.3.2.
4. Replace the 4P-8251 Riser Assembly and support brackets with the new 292-2972 Riser Assembly (9), 292-5556 Support Bracket (10), and 284-7634 Support Bracket (11). Refer to Images 2.3.2 and 2.3.3.
a) Refer to Image 2.3.3. New 0S-1591 Bolts, 9X-6458 Washers, and 293-3286 Spacers are used between riser support brackets (12). 9S-8752 Nuts are reused in this location.
b) New 9X-6458 Washers are used between the support bracket and exhaust riser (13). 0S-1594 Bolts are reused in this location.
c) New 0L-2070 Bolts, 2Y-9255 Spacer, and 229-5332 Gasket are used at the exhaust manifold flange (7). 108-3612 Spacers should be removed and 2Y-9255 Spacer should be used on the top bolt of the 3-bolt flange. 5M-2894 Washers and 9S-8752 Nuts are reused in this location.
Parts Needed for Left Side Repair:
Image2.3.1
Image2.3.2
Image2.3.3