Pressure Measurement; Required Tools; Port Locations And Gauge Installation - Danfoss 90 Series Service Manual

Service Manual

Pressure measurement

Required tools

Port locations and gauge installation

22
Series 90 Pumps
You can perform the service procedures described in this manual using common mechanic's tools.
Special tools, if required are shown. Use calibrated pressure gauges to ensure accuracy. Use snubbers to
protect pressure gauges.
The following sections list the ports for each type of hydraulic unit. The fitting size and recommended
pressure gauge are also specified.
The following table and drawings show the port locations and gauge sizes needed.
Port information
Port identifier Pressure obtained
M1, M2 System pressure
M3 (M6) Charge pressure
M4, M5 Servo pressure
L1, L2 Case pressure
X1, X2 HDC/EDC control pressure
X3 External control pressure
S Charge pump inlet
520L0818 • Rev 0101 • August 2015
Gauge size Port size
1000 bar [10 000 psi] 9/16-18
50 bar [1000 psi] 9/16-18
50 bar [1000 psi] 9/16-18
10 bar [100 psi] 030-042
055-100
130
180-250
50 bar [1000 psi] 7/16-20 or 9/16-18
50 bar [1000 psi] 9/16-18
Vacuum gauge, 030-042
Tee into inlet line
055-075
100-180
250
7/8-14
1-1/16-12
1-5/16-12
1-5/8-12
1-1/16-12
1-5/16-12
1-5/8-12
1-1/2 SAE-split flange