Table of Contents
Advertisement
Service Manual
Series T90 Axial Piston Pumps
Pressure measurement
Required tools
Port locations and gauge installation
Pump with side port end cap and manual displacement control
Case drain
port L1
System pressure
port B
System pressure
gauge port M2
Charge inlet pressure
(vacuum)
System pressure
gauge port M1
Carge pump
inlet port S
System pressure
24 |
©
Danfoss | March 2020
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
Servo / displacement
cylinder pressure
gauge port M4
Servo / displacement
cylinder pressure
gauge port M5
Case drain port L2
port A
Gauge size
1000 bar [10 000 psi]
50 bar [1000 psi]
50 bar [1000 psi]
10 bar [100 psi]
50 bar [1000 psi]
50 bar [1000 psi]
Vacuum gauge,
Tee into inlet line
Speed sensor
Charge pressure
gauge port M3
Port size
9/16-18
9/16-18
9/16-18
055-100
1-1/16-12
9/16-18
9/16-18
055-075
1-5/16-12
100
1-5/8-12
External control pressure
supply port X3
P106 158E
AX216086485386en-000101
Advertisement
Table of Contents
