Danfoss Series 42

MDC Module....................................................................................................................................................................................40
HC-EDC and EDC Module............................................................................................................................................................43
MDC/EDC Spool, linkage, and neutral adjustment screw...............................................................................................44
MDC Neutral start / backup alarm switch............................................................................................................................. 46
MDC Solenoid override valve.................................................................................................................................................... 49
FNR, NFPE, and NFPH Controls (bolt-on valves)................................................................................................................. 51
FNR, NFPE, and NFPH Controls (integral valves).................................................................................................................52
System Check Relief (SCR) valves (high pressure relief, charge check, and bypass valves)................................53
Auxiliary pad/charge pump cover...........................................................................................................................................55
Charge pump...................................................................................................................................................................................57
Servo piston covers and NFPH control orifice.....................................................................................................................60
Loop flushing and loop flushing relief valve........................................................................................................................62
Shaft seal, roller bearing, and shaft replacement...............................................................................................................64
Appendix A - Torques
Torque table.....................................................................................................................................................................................68
Appendix B - Specification Tags
Pre-block point change................................................................................................................................................................70
Post-block point change............................................................................................................................................................. 71
Appendix C - Nomenclature
Pre-block point change nomenclature..................................................................................................................................72
Post-block point change nomenclature................................................................................................................................73
Service Manual Series 42 Axial Piston Closed Circuit Pumps
Contents
4 520L0638 • Rev 0300 • July 2015