Jack's Re-Certification Guidelines Based on Usage Frequency.
Considering an eight-hour-a-day shift.
Heavy-Duty: 12 months/year. Recertification every 1-2 years.
Moderate Usage: 6 months/year. Recertification every 2-3 years.
Light-Duty: 3 months/year. Recertification every 3-5 years.
All jacks must be re-certified at least once every 5 years, regardless of usage level.
Re-Certification Test Scope
1, Pressure Test: Extend and retract the 6 & 12 MT jack at 1,750 PSI, and the 25 MT jack at 2,500 PSI. Hold pressure for three minutes, check for leaks.
2. Cycle Test: Conduct one hundred strokes (extend and retract) at rated pressure; for 6 or 12 MT jacks at 1,750 PSI, and for 25 MT jack at 2,500 PSI. Check for leaks. Video Clip under construction.
3, Hydraulic Holding Test with UTM: The jack is tested to its rated capacity of either 6 or 12 MT at 1,750 PSI, and the 25 MT jack at 2,500 PSI. The test should be performed with the top grip jaws open and the bottom grip jaws closed. Verify that the jack is not slipping on the column.
4. Mechanical Holding Test with UTM: The jack is loaded to its rated capacity of 6, 12, or 25 MT with the top grip jaws closed and the bottom grip jaws open. Verify that the jack is not slipping on the column.
Notes:
1. The Re-Certification applies only to the jack itself.
2. Repairs: Any repairs needed after the Re-Certification Tests are not included; For example, jack seal kits, grip jaws, springs and parts of the jack locking mechanism.
3. Frequently Asked Questions (FAQ]
