Pump pressure regulation procedures: 1, purpose: to guide the pump pumping, reversing, mixing, washing hydraulic system pressure regulation. 2, the scope of application: all models of pump. 3, adjustment steps: 3.1 according to the "pump debugging process" in the requirements of "ready" and "start" work. 3.2 The main valve block on the main relief valve, valve relief valve on all sub-relief screw all the loosening. 3.3 All pressure adjustments are in close control state. 3.4 Commutation pressure adjustment: 3.4.1 The engine speed is adjusted to 1750 ± 100rpm after the jitter pressure; 3.4.2 observe the pressure gauge, slowly tighten the auxiliary valve block commutation relief valve adjusting screw, ordinary pump will Commutation pressure setting Locking adjustment lever after 16Mpa, with the boom vibration pump to be transferred to 18MPa; 3.4.3 The engine speed down to idle, observe the pressure gauge, the maximum required 13Mpa, the minimum is not allowed to appear Fall to zero (that is, below the accumulator pressure) phenomenon; if not meet the requirements, we must stop to identify the cause. 3.5 Stirred pressure regulation: 3.5.1 The engine speed is adjusted to 1750 ± 100rpm rpm, and close the mixing motor inlet ball valve, then the mixing pressure gauge shows the pressure of the stirring system; 3.5.2 Check the mixing reversing pressure relay set Set the pressure: Slowly tighten the auxiliary valve block stirring pressure relief valve adjusting screw, the stirring pressure is adjusted to about 11.2Mpa, then the stirring blade should be reversing trend (or stirring reversal solenoid valve should be electric), if not Meet the requirements, then adjust the pressure stirring stirring reversal pressure relay to meet the requirements; 3.5.3 Remove the stirring reversal solenoid valve plug, the stirring pressure set at 12Mpa; 3.5.4 open the stirring motor inlet valve, stirring Turn the solenoid valve plug installed. 3.6 Washing pressure adjustment: 3.6.1 According to the "pump debugging process" in the requirements of the pump casing to add the appropriate capacity of the oil pump motor and exhaust air before adjusting the washing pressure; 3.6.2 The engine speed adjusted to 1750rpm, And close the pump motor inlet ball valve, press the wash switch button, then stir the pressure gauge shows the pressure of the pump motor; 3.6.3 observe the mixing pressure gauge, slowly tighten the sub-valve pump motor pressure relief valve adjusting screw, Adjust the pump motor pressure to 4Mpa (QL-80, Centrifugal Pump), 8MPa (7560C) to lock the adjusting lever. 3.7 The main relief valve pumping pressure relief valve and the main pump pressure regulator: 3.7.1 The pressure can be adjusted before the main relief valve and the main oil pump pressure regulator; 3.7.2 The main pump pressure regulator D all Tighten; 3.7.3 the engine speed adjusted to 1750 ± 100rpm rpm, press the back button, observe the main system pressure gauge, slowly tighten the main relief valve adjusting screw, the main system pressure is set at 34 ± 0.5Mpa locking adjustment Rod; 3.7.4 For a single main pump pump, observe the main system pressure gauge, slowly loosen the single main pump pressure regulator D, the main system pressure is set at 32 ± 0.5Mpa locking lever; Double main pump truck, two main oil pumps are respectively connected to the pressure gauge, unplug the second electric pump proportional valve plug, slowly loosen the pressure regulator on the first main pump D, the main system pressure is set at 32 ± 0.5Mpa locking lever; then plug the second pump electric proportional valve plug, unplug the first oil pump electric proportional plug, slowly loosen the second main oil pump pressure regulating rod D, the main system Adjust the pressure at 32 ± 0.5Mpa locking lever.