Visually inspect the compressor drive splined coupling for cracks or broken splines.
Visually inspect the fuel pump drive hub or spider coupling for wear or damage.
Visually inspect the compressor housing for cracks or damage.
Visually inspect the compressor drive gear and the fuel pump hub-type drive coupling for wear or damage.
Measure the single cylinder air compressor crankshaft end clearance.
Measure the two-cylinder air compressor crankshaft end clearance.
NOTE: If cracked or damaged parts are found or the end clearance exceeds the limits specified, the air compressor
must be rebuilt or replaced. Refer to Air Equipment Rebuild Manual, Bulletin No. 3810242, for single cylinder, or Bulletin No. 3810257, for two-cylinder air compressor rebuild instructions.
