TM 55-4920-394-13&P
SECTION III. MAINTENANCE INSTRUCTIONS
3-19. General.
3-20. Maintenance. Maintenance of the portable hydraulic test stand consists of periodic inspection, cleaning,
service adjustments, minor repairs, replacement of parts and components, and lubrication. The procedures
described in this section must be performed regularly and thoroughly, even though test stand is operating
satisfactorily. Through proper inspection, maintenance, and lubrication, equipment that is not in continuous use
is kept ready for operation when necessary, and the test stand is maintained for peak performance for the
maximum service life of the equipment.
3-21. Maintenance.
3-22. General. Maintenance is generally limited to cleaning, service adjustments and minor repairs, or
replacement of parts and components that require periodic attention through normal service use. Generally,
instructions for minor repair or replacement consists essentially of carefully noting method of installation when
removing defective parts or components, performing the necessary repair or adjustments, and installing parts in
the reverse order of removal.
WARNING
Release all system pressure prior to removal of components from
hydraulic systems, and ensure that input power cable is disconnected to
avoid possible injury to personnel.
3-23. Cleaning. The test stand should be cleaned whenever there is an accumulation of dust or dirt on the
exterior of the cabinet or control panel, or whenever grease, oil or similar foreign matter is inadvertently spilled
within the unit. Clean the unit in accordance with the following procedures:
WARNING
To avoid injury to personnel, cleaning operations shall be performed in a
well ventilated area, away from open flames, heat and sparks. Disconnect
input power cable before beginning cleaning procedures.
a.
Clean exterior of cabinet and control panel, using a clean cloth dampened with cleaning solvent,
Federal Specification P-D-680. Dry surfaces with a clean, dry cloth. Do not return test stand to use
until solvent has been completely dried.
CAUTION
Do not allow solvent to enter gauges, switches, or electrical receptacle of
input power cable.
3-10