Pressure Measurements; Port Locations And Gauge Installation - Danfoss 51 Series Service Manual
Hydraulic proportional controls
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Also See for 51 Series:
- Service manual (64 pages) ,
- Repair instructions (36 pages) ,
- Service kit instructions (2 pages)
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Service Manual
Pressure measurements
Port locations and Gauge Installation
Port Information
Port identifier
Port size
L1, L2
1 1/16-12 UNF
M1, M2
9/16-18 UNF
M3, M4, M5
9/16-18 UNF
X1, M7
9/16-18 UNF
10
Series 51 Hydraulic Proportional Controls Service Manual
The following table and drawings show the port locations and gauge sizes needed. When testing system
pressures, calibrate pressure gauges frequently to ensure accuracy. Use snubbers to protect gauges.
Wrench size
9/16 internal hex
1/4 internal hex
1/4 internal hex
1/4 internal hex
Port Locations
Radial ported motor
L1
L2
Axial ported motor
11009446 • Rev BA • July 2014
Reading
Case drain
System pressure
Servo pressure
Control pressure
M3
Threshold
adjustment
M5
M7
X1
M7
M1+M2
Gauge size, bar [psi]
10 bar [100 psi]
600 bar [10,000 psi]
50 bar [1000 psi]
50 bar [1000 psi]
M4
M2
M1
System port B
System port A
P106 434E
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