Pierce Mid-Mount Ascendant Aerial Tower, Руководство пользователя, Страница: 56 / 132

GENERAL
2-14 / Mid-Mount Ascendant Aerial Tower
© 2021 Pierce Manufacturing Inc. All Rights Reserved.
2-1.10 Manual Override Controls
Figure 2-14: Manual Stabilizer and Override Controls
POM0832
NOTE: • The EPU should be used only when the main system hydraulic pump is not operating.
• The EPU has a limited run time before possible overheating. DO NOT run the EPU for more
than 30 minutes continuous without allowing 30 minutes for cooling down. Limiting loads and
pressures will allow for more efficient use of the EPU and will also generate less heat.
• The EPU should only be activated after the desired function is selected.
Item # Description and Function
57. AERIAL/STABILIZER EMERGENCY HYDRAULIC POWER SWITCH. This switch engages the
secondary hydraulic system. The position of this emergency power unit (EPU) switch is not dependent on
other electrical circuits. Push UP to provide EPU power for the aerial functions; push DOWN to provide
EPU power for the stabilizer functions.
58. MANUAL AERIAL OVERRIDE CONTROL VALVES. Used for maintenance in the event of an aerial
electrical system failure.
59. MANUAL STABILIZER OVERRIDE CONTROL VALVES. Used for maintenance in the event of a
stabilizer electrical system failure.
Read and follow the Manual Valve Controls Safety Instructions in the Safety section of this manual.
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