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9 Start-up Start-up of the hydraulic system
© Moog GmbH User Manual "D633-A Series" (CA80942-001; Version 1.0, 12/08) 49
9.4 Start-up of the hydraulic system
Procedure for start-up of
the hydraulic system
Procedure:
1. Start up the hydraulic system in accordance with the instructions of the
manufacturer and the operator of the machine.
2. Vent the hydraulic system in accordance with the instructions of the man-
ufacturer and the operator of the machine.
3. Check the hydraulic system for external leaks.
9.4.1 Venting the hydraulic system
CAUTION Air trapped in the hydraulic system, particularly in the case of
high pressure peaks in the system, can cause a diesel effect. If
the trapped air bubbles are compressed very quickly and thus
heated, this can cause the mixture to self-ignite. This causes a
very high increase in pressure and temperature locally, which
in turn can result in damage in the hydraulic system, e.g., to
seals or components, causing the oil to age more quickly.
To avoid diesel effects, it is essential to vent the hydraulic sys-
tem.