KNOB-LOCK 3879474 - Caterpillar

Install three hard washers (66) and three nuts (67). Install six hard washers (20) and six bolts (25), loosely.Note: Do not tighten three nuts (67) or six bolts (25) to a final torque until the muffler inlet, the exhaust tubes, and the bellows are aligned.
Illustration 92 g03872603
(111) 8T-4194 Bolt
Loosen twelve bolts (111). Use the suitable lifting device to align the muffler inlet with the exhaust tubes on the truck chassis.Note: Do not tighten twelve bolts (111) to a final torque until the muffler inlet, the exhaust tubes, and the bellows are aligned.
Illustration 93 g03872610
(53) 225-0947 Bolt
(54) 260-6693 Washer
(55) 3E-8017 Locknut
(77A) 354-4106 Bracket
Install four brackets (77A), eight hard washers (54), four bolts (53), and four locknuts (55).Note: Do not tighten four bolts (53) to a final torque until the muffler inlet, the exhaust tubes, and the bellows are aligned.
Illustration 94 g03872659
(112) 8T-4172 Bolt
(113) 241-8492 Band Clamp
(114) 174-7926 StrapNote: Do not start the engine until the bellows assemblies have been aligned and the two strap assemblies and the two V- band clamps have been tightened to a final torque.
If necessary, loosen four bolts (112) and four V-band clamps (113). Adjust four strap assemblies (114) for optimal lateral and axial alignment of the bellows assemblies using Tooling (A). Refer to Special Instruction, SEHS0323, "Instructions for the Proper Use of the Alignment Tool For the Installation of Exhaust Bellows on Certain 797F Off-Highway Trucks".
Any misalignment in the system can potentially shorten the life of the bellows.
Once the bellows, the exhaust tubes, and the muffler inlet tubes are aligned, tighten two V-band clamps (113) to a torque of 16 4 Nm (142 35 lb in). Tap the V-band clamps (22) all around then tighten to 16 4 N m (140 35 lb in) again. Static inspection torque is a minimum of 9 N m (80 lb in). Tighten four bolts (112) to a final torque.
Illustration 95 g03872770
(111) 8T-4194 Bolt
Tighten twelve bolts (111) to a final torque.
Illustration 96 g03872695
Illustration 97 g03872749
(25) 8T-4195 Bolt
(67) 8T-4244 Nut
Tighten three nuts (67) and six bolts (25) to a final torque.
Illustration 98 g03872757
(15) 8T-6868 Bolt
(74) 8T-4910 Bolt
Tighten two bolts (74) and one bolt (15) to a final torque.
Illustration 99 g03872760
(53) 225-0947 Bolt
Tighten four bolts (53) to a final torque.Radar and Camera adjustment and calibration
After the truck has been assembled and the body has been installed, the camera and radars must be adjusted and calibrated. Refer to Testing and Adjusting, UENR2507, "Cat® Detect Object Detection System", "Object Detection Sensor - Calibrate" and Testing and Adjusting, UENR2507, "Cat® Detect Object Detection System", "Object Detection Sensor - Adjust" or Testing and Adjusting, KENR8668, "Cat® Detect Object Detection System", "Object Detection Sensor - Calibrate" and Testing and Adjusting, KENR8668, "Cat® Detect Object Detection System", "Object Detection Sensor - Adjust"for the correct procedures.