VALVE GP-MAIN CONTROL 1588200 - Caterpillar

Disassembly Procedure for the Flexible Exhaust Pipe Assembly
If any part of the flexible exhaust pipe assembly is damaged. Refer to Special Instruction, REHS5014, "Reuse Guideline for the Flexible Exhaust Pipe Group on Tier 4 Engines" for more information.
Illustration 3 g02354617
If necessary, follow Step 2.a through Step 2.d in order to disassemble the flexible exhaust pipe assembly.
Make temporary marks in Position (F) on all components of the bellows (3) and tube assembly (6) in order to show correct orientation and alignment. Note: Do not scribe the components in order to mark the position of the flexible exhaust pipe assembly.
Loosen clamp (7) and remove tube assembly (6) from bellows (3).
Loosen ball clamp (8) and remove the ball clamp. Discard the ball clamp.
Remove bellows (3) from the elbow (9). Note: Ensure that the flexible exhaust pipe bellows are not subjected to any undue stress.Assembly Procedure for the Flexible Exhaust Pipe Assembly
Ensure that all components of the flexible exhaust pipe assembly are clean and free from wear and damage. If necessary, replace any components of the flexible exhaust pipe assembly that are worn or damaged. Refer to Special Instruction, REHS5014, "Reuse Guideline for the Flexible Exhaust Pipe Group on Tier 4 Engines" for more information.
Illustration 4 g02354618
If the flexible exhaust pipe assembly was previously disassembled. Follow Step 2.a through Step 2.i in order to assemble the flexible exhaust pipe assembly.
Use the correct personal protective equipment when removing the clamp.
If original bellows are to be reinstalled, place the internal area in Position (G) of the bellows on a suitable support. Use a 3 mm (0.118 inch) in order to drill a pilot hole through the spot weld in Position (H) on clamp (7). Note: Do not center punch the spot weld on clamp (7).
Use a 6.5 mm (0.256 inch) in order to drill out spot weld in Position (H) on clamp (7). Remove clamp (7) from the bellows.
Remove all burrs from the internal and external areas of bellows (3). Ensure that debris does not enter bellows.
Illustration 5 g02354619
Position a new clamp (7) onto bellows (3). Hand tighten clamp (7). Ensure that the center of the clamp is central to Slots (J) on the bellows. The clamp must be flush with the end of the bellows (3). Note: Ensure that the bellows are not subjected to any undue stress.
If new bellows (3) are installed, clamp (7) will be pre-installed to the bellows. Note: Ensure that the bellows are not subjected to any undue stress.
Position a new ball clamp (8) onto elbow (9).
Position bellows (3) onto elbow (9). Align the bellows and the elbow with temporary marks.
Tighten ball clamp (8) hand tight. Note: Ensure that the bellows are not subjected to any undue stress.
Install tube assembly (6), align the tube assembly with the temporary marks on the bellows. Tighten clamp (7) hand tight. Installation Procedure for the Flexible Exhaust Pipe as an Assembly
Inspect the bellows for damage prior to installation. If there is any damage to the convolutions, discard the bellows. If there is any difficulty in installation