FUEL PUMP HOUSING GROUP 2M4050 - Caterpillar

the condition of the isolators. The isolators must be kept clean and dry. Ensure that the isolators are free of oil and contamination.Resilient Isolators
Illustration 1 g00745665
(1) Rubber element Each isolator has four rubber elements. The most usual cause for failure of the isolator is oil contamination of the rubber elements. Inspect the rubber elements of each isolator for the following conditions.
Swelling
Blistering
CrackingPerform the following procedures when deterioration of the rubber elements is initially observed:
Record the observation in a log.
Check the alignment of the driven equipment.After deterioration of the rubber elements is initially observed, the rubber elements must be carefully inspected. Any further deterioration of the rubber elements must be recorded. The isolator must be repaired or replaced if rapid deterioration of the rubber elements is observed.Deterioration of the rubber elements is usually accompanied by settling of the isolator. Settling of the isolator will result in misalignment between the engine and the driven equipment.Check the Center Bolt
Illustration 2 g00745664
(2) Locknut
(3) Adjustable assembly
(A) Clearance above the adjustable assembly Check the tightness of locknut (2) on the center bolt. Use a minimum torque of 100 N m (75 lb ft).If locknut (2) is loose, perform the following Steps:
Tighten locknut (2) to 140 N m (105 lb ft).
Measure clearance (A) above adjustable assembly (3).
Compare the clearance to the specification from the engine commissioning. The clearance and the specification from the engine commissioning must be equal. Any difference in the dimension indicates that the height of the isolator has changed. A change in the height of the isolator will result in misalignment between the engine and the driven equipment.