What is the life of the pump on the D55146 Heavy Duty Hand Carry Compressor? Wilson November 18, 2020 14:20 Updated Follow The pump life of this unit is rated at 500 hours. The pump life is measured as the actual running hours of the pump, not the hours worked by the user. Normally the pump run time is only a fraction of user work time. Related articles What type of motor is in the D55146 Compressor? My compressor continues to run and build pressure past its advertised cut off pressure until the safety valve engages. How can I fix it? Comments 0 comments Please sign in to leave a comment.