Observe the gauges during operation. Thepressure readings on the pump’s two gauges should agree. If they disagree by 10 bar (145 psi) or more, discontinue the operation immediately and release the hydraulic pressure. Using the master calibrated pressure gauge in the tool kit, cross-check the two gauges to determine which one is in error. When located, replace the erroneous gauge with the calibrated one from the tool kit. Check the operation of both gauges again. Have the erroneous gauge calibrated and remember to replace the master gauge (P/N 373036) used from the tool kit.