This completes the maintenance portion of this lesson. In the next part
of this lesson will be the troubleshooting procedures of the hydraulic
PART E - TROUBLESHOOTING THE PRIMARY/BACKUP HYDRAULIC SYSTEM
For the troubleshooting process the hydraulic system will be broken down
into the following sub-systems:
o Upper Rear Door.
o Primary Hydraulic Pump.
o Backup Hydraulic System.
the maintenance portion of this lesson, they will be mentioned in this
part. To correctly troubleshoot a system you must systematically check
ALL components, and be able to recognize any trouble indications whether
they are mechanical, hydraulic, or electrical.
There are some primarily troubleshooting procedures that
accomplished prior to troubleshooting any of the sub-systems:
o Ensure the vehicle MASTER switch is in the ON position.
o Ensure the APU is operating the primary hydraulic system and push
the hydraulic system selector valve IN, or the main engine is
operating the backup hydraulic system and pull the hydraulic
system selector valve OUT.
Test components must be capable of withstanding a
working pressure of 2000 psi. Also, NEVER tighten
hydraulic lines or fittings while the hydraulic
system is pressurized. Damage to tubes and fitting
could result in personal injury.