Using the bypass function
P106 633E
Bypass check valve
5/8 in
System check/relief (SCR) valves
The SCR valve is a high pressure relief valve and a system check valve in combination. Whenever an SCR
valve is replaced or opened, opperate the pump in its full range of functions to ensure proper machine
operation. The SCR valves are pre-set at the factory, no adjustment is possible. Pressure code is marked
on the valve. Refer to the model code for pressure designation. If you suspect SCR malfunction, replace
valve and test operation of pump.
This procedure explains how to replace the SCR valves.
1. Shut down the system.
2. Using a 1-1/4 in. hex wrench, remove relief valve plug (166).
3. Remove spring (165) and relief valve (1103) from pump housing.
4. Insert new relief valve and spring into pump housing.
5. Lubricate and install new O-ring (106).
Service Manual
Series 40 M46 Variable Pumps
Adjustments
20 |
©
Danfoss | September 2017
11026743 | AX00000027en-US0202