Tronair 5731, Operation & Service Instructions

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Model: 5731
Hydraulic Power Unit
08/2016 | Rev. 08 Page | 1
This product can not be modified without the written approval of Tronair, Inc. Any modifications done without written approval
voids all warranties and releases Tronair, Inc., it suppliers, distributors, employees, or financial institutions from any liability
from consequences that may occur. Only Tronair OEM replacement parts shall be used.
1.0 PRODUCT INFORMATION
1.1 DESCRIPTION
Hydraulic Power Unit
Model Number: Fluid Type:
5731 Aviation Phosphate Ester, Type IV
1.2
MODEL & SERIAL NUMBER
Reference nameplate on unit.
1.3
MANUFACTURER
TRONAIR , Inc. Telephone: (419) 866-6301 or 800-426-6301
1740 Eber Road Fax: (419) 867-0634
Holland, Ohio 43528-9794 USA E-mail: sales@tronair.com
Website: www.tronair.com
1.4
FUNCTION
The Hydraulic Power Unit (HPU) provides a source of clean, pressurized hydraulic fluid for performing required aircraft
maintenance. An electric motor drives a pressure compensated piston pump. Filters are provided on the pressure and return
systems. A bypass (dump) valve allows starting and stopping of the unit under a no-load, safe condition. The unit may use
either the aircraft or on-board HPU reservoir. Cooling is provided for continuous operation.
1.5
REQUIREMENTS
Adequate electrical power must be provided for proper functioning of the HPU. See the unit nameplate for proper voltage and
frequency. See the Technical Manual for proper sizing of electrical supply and protection equipment in the facility.
2.0 SAFETY INFORMATION
2.1 USAGE AND SAFETY INFORMATION
The HPU provides pressurized hydraulic fluid for performing aircraft maintenance.
To insure safe operations please read the following statements and understand their meaning. Also refer to your equipment
manufacturer’s manual for other important safety information. This manual contains safety precautions which are explained
below. Please read carefully.
WARNING!
— Warning is used to indicate the presence of a hazard that
can cause severe personal injury,
death, or substantial property damage if the warning notice is ignored.
CAUTION!
— Caution is used to indicate the presence of a hazard that
will or can cause minor personal injury
or property damage if the caution notice is ignored.
2.2
EXPLANATION OF WARNING & DANGER SIGNS
Accidental Starts! Before servicing the HPU or equipment, always disconnect electrical power supply to prevent
accidental starting.
Rotating Parts! Keep hands, feet, hair, and clothing away from all moving parts to prevent injury. Never operate
the HPU with covers, shrouds, or guards removed.
Electrical Shock! Never touch electrical wires or components while the HPU is attached to the power source.
They can be sources of electrical shock. DO NOT operate HPU with cabinet panels removed.
Pressurized Fluid! Before servicing the HPU or equipment, always open the bypass valve to relieve any residual
pressure in the hydraulic system.
2.3 COMPONENT SAFETY FEATURES

Pump/Motor coupling guard

Control circuit fuses

Sheet metal panels

Motor overload protection

Pressure and return system relief valves