CONT GP-MSS 3936336 - Caterpillar

Introduction
Do not perform any procedure in this special instruction until the information has been read and understood. Spring isolators are used in order to reduce vibration and noise. This special instruction provides the necessary information that is required for installing and adjusting spring isolators on the gas 3500 series engine products.Safety Section
At operating temperature, the engine coolant is hot and under pressure.Steam can cause personal injury.Check the coolant level only after the engine has been stopped and the filler cap is cool enough to touch with the bare hand.Remove the filler cap slowly to relieve pressure.Cooling system conditioner contains alkali. Avoid contact with skin and eyes to prevent personal injury.
Personal injury or death can result from high voltage.When power generation equipment must be in operation to make tests and/or adjustments, high voltage and current are present.Improper test equipment can fail and present a high voltage shock hazard to its user.Make sure the testing equipment is designed for and correctly operated for high voltage and current tests being made.When servicing or repairing electric power generation equipment:
Make sure the unit is off-line (disconnected from any utility and/or other generators that can provide power service), and either lock out or tag as "DO NOT OPERATE".
Remove all fuses.
Make sure the generator engine is stopped.
Make sure all batteries are disconnected.
Make sure all capacitors are discharged.Failure to do so could result in personal injury or death. Make sure residual voltage in the rotor, stator and the generator is discharged.
Make sure that the radiator is filled with coolant prior to the adjustment.
Adjust Spring Type Isolators
The part numbers associated with this Special Instruction are listed in Table 1.
Table 1
Part Number     Description    
116-0418     Resilient Mount Assembly    
153-3864     Mount As    
178-5048     Isolator As    
348-5526     Vibration Isolator Mount    
353-9020     Vibration Isolator Mount    All of the generator sets are to be installed on anti-vibration isolators. The isolators must be adjusted after the generator set is installed properly at the on-site location with all of the auxiliary equipment connected. The isolators must be adjusted correctly in order to ensure that the isolators are level and the generator is properly aligned to the engine. If the generator set is hard mounted to a foundation, the generator must be leveled properly.The weight on each isolator should be approximately the same. Proper weight distribution is achieved by making sure that all of the springs are compressed equally. Ensure that none of the springs are collapsed. The isolator will not be able to isolate the transmitted vibrations if the springs are fully compressed.
Illustration 1 g03722645
Two typical examples of spring type Isolators (1) Bolt for adjusting the isolator (2) Locknut (3) Rail bottom surface interface to isolator (4) Isolator springs (5) Foundation (A) Distance to be adjusted 6.35 mm (0.25 inch) to 12.7mm (0.5 inch) Note: If any of the springs are fully compressed and cannot be adjusted, verify that the isolator has been correctly sized for the