KIT-O-RING 4C5859 - Caterpillar

Illustration 1 g01286554
Typical air shutoff (back view)
(1) Air shutoff gate
(2) Damper assembly
The vibration damper on the air shutoff minimizes the vibration of the air shutoff gate when the engine is operating and the air shutoff gate is in the latched position. The components of the damper assembly must be removed in order to ensure correct performance of the damper.
Illustration 2 g01286567
Damper assembly
(3) Plug
(4) Seal ring
(5) Housing
(6) Spring
(7) Plunger
The body of the damper should not be loosened or removed from the air shutoff when the plunger is removed. In order to remove the plunger without loosening or removing the damper, unscrew the plug with the following tools: a 6.35 mm (0.25 inch) Allen wrench and an open end wrench .
Check the seal ring for damage or wear. If necessary, replace the seal ring.
Inspect the internal parts of the vibration damper for wear or damage. Clean the components with 138-8440 component cleaner.
Illustration 3 g01286606
Damper plunger
Remove the plunger from the spring. Visually inspect the exposed end of the plunger for dirt, fouling, damage, and wear. If distance "A" is less than 18.3 mm (0.72 inch) or if a visual inspection reveals dirt, fouling, damage, or wear on the active end of the plunger, replace the plunger. Insert the tapered end of a clean, undamaged plunger into the spring. Install the open end of the spring into the plug. Apply 9S-3263 thread lock or apply 9S-4030 thread lock onto the threads of the plug. Screw the assembly into the damper body. The thread lock should cure for a minimum of 1 hour before the air shutoff is used.