Install Charge Pressure Gauge; Calibrate The Motor/Transmission - Danfoss MP1 Service Manual

Service Manual
MP1 Motor
Initial Start-Up Procedures

Install Charge Pressure Gauge

Calibrate the Motor/Transmission

© Danfoss | November 2020
1. For closed loop systems, install a 0-35 bar [0-500 psi] pressure gauge in the charge pressure gauge
port of the pump to monitor the charge pressure during start-up.
For open circuit systems, use gauges in system ports.
2. Disconnect any external control input signal or command from the pump control until after initial
start-up. This ensures that the pump remains in its neutral position.
3. Jog (slowly rotate) prime mover until charge pressure starts to rise.
4. Start the prime mover and run at the lowest possible speed until charge pressure builds.
W
Warning
Do not start the prime mover unless the pump is in neutral position (swash plate at 0° angle). Take
necessary precautions to prevent machine movement in case pump is actuated (in stroke) during
initial start-up.
5. Once charge pressure is established, increase to normal operating speed. Charge pressure should be
as indicated in the pump model code. If charge pressure is low, shut down and determine cause.
C
Caution
Low charge pressure may affect ability to control the machine.
1. Shut down the prime mover.
2. Connect the external control input signal/command.
3. Reconnect the machine function if disconnected earlier.
4. Start the prime mover, checking to ensure the pump remains in neutral.
5. Check for forward and reverse machine operation, with the prime mover at normal operating speed.
Charge pressure may decrease slightly during forward or reverse operation.
6. Continue to cycle slowly between forward and reverse for at least five minutes.
7. Shut down prime mover.
8. Remove gauges. Replace plugs at the gauge ports.
9. Check reservoir level. Add filtered fluid if needed.
The motor/transmission is now ready for operation.
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