BRACKET 5C7108 - Caterpillar

Introduction
This Special Instruction gives a procedure for relocating the exhaust openings on D300D Articulated Trucks equipped with exhaust heated body. Relocating the exhaust openings will prevent plugging that can occur with the existing exhaust openings.Do not perform any procedure outlined in this publication, or order any parts, until you read and understand the information contained in this Special Instruction.Necessary Parts
All necessary parts to relocate the exhaust opening are fabricated. Use the illustrations and dimensions that follow to fabricate the parts.
Illustration 1. Dimensions for the left angle (1).
Illustration 2. Dimensions for the right angle (2).1. Fabricate one left angle (1) and one right angle (2) using the dimensions in illustrations 1 and 2. Fabricate the angles from 6.0 mm (.24 in) thick carbon steel.
Illustration 3. Dimensions for the end plates.2. Fabricate two end plates (3) from 6.0 mm (.24 in) thick carbon steel. See Illustration 3.
Illustration 4. Dimensions for the exhaust tubes.3. Fabricate two exhaust tubes (4) from steel pipe as shown in illustration 4.Modification Procedure
Illustration 5. Location of the ribs and end plates to be removed.1. Remove the existing left and right ribs and closing plates shown in Location A in Illustration 5.
Illustration 6. Fabricated parts. Left side shown.2. Weld the fabricated angle (1) and end plate (3) in place on the left side of the machine with a 6.0 mm (.24 in) fillet weld. Weld the fabricated angle (2) for the right side of the machine and end plate (3) in place with a 6.0 mm (.24 in) fillet weld.3. Position the exhaust tubes (4) in the center of the openings in end plates (3). Weld the exhaust tubes in place with a 6.0 mm (.24 in) fillet weld all around.
Illustration 7. Location of the condensation drain holes in the bottom of body ribs.4. Drill a 20.0 mm (.79 in) diameter hole in each end of the five body ribs, Locations B, C, D, E and F, to allow condensation to drain from the body. The holes should be 100.0 mm (3.94 in) from the outer end and centered in the bottom of the five ribs.5. Fabricate and weld suitable plates over the original exhaust openings on either side of the body at Location G.6. Clean and paint all welded areas.