SEAL 5P5974 - Caterpillar

Caterpillar Products: Equipped with Air CompressorsDo not perform any procedure in this Special Instruction until you read this information and you understand this information. Do not perform any procedure in the Air Compressor Service Manuals until you read the information and you understand the information. Use only proper tools and observe all precautions that pertain to the use of those tools. Failure to follow these procedures can result in personal injury and premature failure of the air compressor. The following procedures should also be observed.
Park the vehicle on a level surface. Engage the parking brake. Block vehicle wheels. Tag the ignition switch for the engine with a "Do Not Run" tag.
Purge all pressurized components, reservoirs, and lines to zero pressure. Do not disconnect any pressurized components or do not remove any pressurized components until the pressure is zero.
Never exceed the recommended air pressure or fluid pressure. Always wear safety glasses when pressurized systems are being worked on.
Inspect all air lines, coolant lines, oil lines, and governor lines for the following conditions prior to installation:
Crimped lines
Other flow restrictions
Corrosion
Additional damageClean the lines or replace the lines. Installation of the Air Compressor
MountingNote: Refer to the following applicable publications for complete specifications:
Engine service manual
Vehicle service manual
Air compressor service manual
Governor installation
Air dryer circuit
Special instructions
Remove all thread protectors from the air compressor. Make sure that no dirt particles enter the passages. Clean all mating surfaces of the air compressor and the engine before the gaskets are installed.
Install either of the following drive mechanisms. This is dependent on the type of drive for the air compressor that is being installed.
Pulley
Accessory drive gear
Spline couplingInspect the drive mechanism for visible wear or damage.Repair the suspect parts or replace the suspect parts.Tighten the retaining nut to the torque that is specified in the applicable Air Compressor Service Manual.
A new gasket should be used when the compressor is installed on the engine. Do not use gasket sealant. Check for proper alignment of the air compressor crankshaft and drive components before final tightening of bolts. Tighten the mounting hardware to the torque that is specified in the applicable Air Compressor Service Manual. Use 9S-3263 Thread Lock Compound on mounting bolts. Some large air compressors require an additional support bracket and attachment hardware due to increased length and weight.Note: The maximum pulley offset is 76.2 mm (3.00 inch) on arrangements for air compressors that are driven by a pulley. When the drive belt is tightened, do not exceed 1068 N (240 lb) of radial force on the crankshaft. Excessive force on the crankshaft could result in shorter bearing life and/or a broken crankshaft.
Install the inlet manifold or the fitting and install the exhaust fitting to the compressor. Use new gaskets or seals. Do not use sealant.
GovernorNote: Make sure that the governor exhaust port is open to the atmosphere.Install the following components:
Governor
Line from the air reservoir to the governor
Line for the governor unloader to the air compressorNote: The unloader line for the governor is not required if the governor is directly