Danfoss H1 Service Manual

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Contents

3. If machine is towable with HPRVs opened three turns and if wheels are locked (not towable) withHPRV valves closed, bypass function is working correctly.Engaging the bypass functionP109554060/068ABLegendItem Description Wrench size TorqueA HPRV valve for rear pump 22 mm 70 N•m [52 lbf•lb]B HPRV valve for front pump 22 mm 70 N•m [52 lbf•lb]Displacement limiter adjustmentAn optional displacement limiter is located on each side of the pump housing. The maximumdisplacement can be limited in either direction.Displacement limiters are not pre-set by the factory but are installed to minimize the extension of theadjustment screw while not limiting the maximum displacement of the pump. A small amount ofclockwise screw adjustment is required before the 100% displacement condition is reached.1. Mark servo cylinder location in case it rotates during displacement limiter adjustment.2. Loosen the locknut (E550).3. Rotate the adjusting screw (E450) based on the following table. Rotating the adjusting screwclockwise decreases the maximum displacement of the pump while rotating the adjusting screwcounterclockwise increases the maximum displacement.4. After establishing the desired maximum displacement setting, hold adjusting screw in place andtighten the locknut. Torque to 23 N•m [17 lbf•ft].C CautionBe sure servo cylinder does not rotate when displacement limiter locknut (E550) is torqued.Service ManualH1 45/53/60/68 Tandem Closed Circuit Axial Piston PumpsAdjustments© Danfoss | June 2018 520L0928 | AX00000103en-US0303 | 39