Tronair 02A7843-0112, Operation & Service Manual

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Model: 02A7843-0112
25 Ton Single Stage Jack
01/2004 | Rev. 04 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 DESCRIPTION
The Tronair Single Stage jack incorporates the following quality features:

Steel Construction

Mechanical ram lock nut that prevents lowering of jack under load

Quick action mechanical extension

Single speed, manually operated pump with pressure relief

Uses standard MIL-PRF-5606 hydraulic fluid

Pneumatic pump with a 1/4 inch NPT air drive inlet
2.0 USAGE
The purpose of the following jacks are to lift the aircraft for maintenance. See 3.0 Specifications for capacity of jack.
3.0 SPECIFICATIONS

Rated Capacity: 50,000 lbs.

Minimum Closed Height: 49.0 inches

Mechanical Extension: 25.0 inches

Hydraulic Extension: 30.5 inches

Maximum Height Obtainable: 104.5 inches

Weight: 500 lbs.

Pressure Relief Setting: 3250 + 3000/-0 psig

BUNA ‘N’ Seals
4.0 ASSEMBLY INSTRUCTIONS
4.1 GENERAL INSTRUCTION
This product should be assembled and/or repaired using good workmanship practices and proper tools. Bolts and elastic
stopnuts should be tightened to a torque not to exceed industry standards for Grade '5' bolts.
All replacement parts must be the same as or equal to the original parts supplied.
4.2
PRE-USE CHECKS
Refer to the Parts/Kits Lists and Illustrations to identify and ensure that all parts are present.

Generally check over unit to assure the tightness of all nuts, bolts and fittings.

With rams completely collapsed, check hydraulic fluid level; 1.5 inches below vent. Replenish with MIL-PRF-5606 fluid as
required.
5.0 OPERATING INSTRUCTIONS
The user should be familiar with the following statements prior to using the jack(s):
CAUTION!
1. NEVER put hands between the aircraft and the jack pad; as after aircraft has been lowered, struts may
have hung up.
2. NEVER align jack under aircraft by pounding on jack legs. Dented legs may lead to jack collapse.
3. ALWAYS lower ram locking nut(s) after jack is under load. Be sure ram nut(s) is seated fully after
jacking.
4. ALWAYS raise and lower jacks simultaneously so that aircraft remains level.
5. ALWAYS use a tail or nose stand, as applicable, for additional stability.
5.1
JACK INSTRUCTIONS
To Raise Aircraft:
1. Place jack on a hard, level surface.
2. Raise mechanical extension as close to aircraft jack pad as possible.
3. Close pump release valve and operate pump.
4. Lower ram locknuts as aircraft is raised.
5. If air pump is to be used, be sure shop air needle valve is closed and attach shop air (125
PSI
maximum) to needle valve.
Slowly open needle valve. Close needle valve when ram reaches required height.
To Lower Aircraft:
1. Lower all jacks simultaneously.
2. If ram locking nut(s) is tight, raise jack slightly to release nut(s).
3. Loosen pump release valve slightly to slowly lower aircraft. Raise locking nut(s) as jack ram(s) lower.