Neutral Positioning Test; Check For External Leakage - Danfoss VSPP Service Manual

Service Manual
VSPP Steering unit
Testing of VSPP

Neutral positioning test

Check for external leakage

34 | © Danfoss | November 2019
1. After adjusting the pilot relief valve, the steering wheel must be able to go to neutral position by itself
no later than ~1 second after the activation of the steering wheel has been stopped.
2. The steering unit is in neutral position when the pressure drop (P-T) is no higher than 18 bar.
1. After testing of the former items, the port connections are removed.
2. P, EF, L, and R ports are to be plugged with steel plugs.
3. Oil pressure of 20 bar is supplied to the T-front port for approximately 3 minutes:
No leakage must be found in any assemblies.
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