Danfoss Series 42 Service Manual

Installation of FNR and NFPE modules (integral valve style)
1. Clean the valves and ports.
2. Install new O-rings on valve actuator stems (D060).
3. Install actuator stems (D060) and torque to 30.5 N•m [22.5 lbf•ft].
4. Install coil (D061). Use new O-rings (D063 and D064) with NFPE coils.
5. Torque coil nut per illustration.
System Check Relief (SCR) valves (high pressure relief, charge check, and bypass valves)
The System Check Relief valve assembly performs the charge check, high pressure relief, and loop bypass
functions. You may remove this assembly for cleaning and replacement of O-rings. The model code
specifies which configuration of SCR valves your pump uses.
System check relief valve components
K007
/ mm
70 N•m
[52 lbf•ft
]
5
16
K008
K009
K010
H005
J005
K007
1 inch
70 N•m
[52 lbf•ft]
K008
K009
K010
WITHOUT
BYPASS
WITH
BYPASS
P108 089E
1. Using a 1 inch wrench or a 5/16 inch internal hex wrench, remove the valve seat plugs (K007) from
the pump housing. Remove and discard the O-rings and backup rings (K008, K009, and K010).
2. Remove the check poppet/relief valve assemblies (H05/J05) from the pump housing.
3. Inspect the valves and mating seats in the valve seat plugs (K007) for damage or foreign material.
The SCR valves (H005/J005) are non-serviceable; replace as a complete unit.
Service Manual
Series 42 Axial Piston Closed Circuit Pumps
Minor Repair
520L0638 • Rev 0300 • July 2015 53

Danfoss Series 42 Specifications

General

Brand	Danfoss
Model	Series 42
Category	Water Pump
Language	English