|
| |
TM 9-5130-338-12&P
1-9. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS.
The hydraulic impact wrench is designed primarily for heavy-duty disassembly and assembly tasks where torque
requirements are maximum and available power resources are minimal. The impact wrench consists of two major
assemblies: the impact head and the motor unit. The impact head is located in a die-cast housing constructed of an
aluminum alloy or press-formed steel. The motor unit contains connections for two hydraulic hose lines, handle, and
trigger. It provides a 3/4-in.-square drive for the attachment of heavy-duty sockets.
1-10. EQUIPMENT DATA.
Manufacturer ................................................................................................................ Stanley Hydraulic Tools
Operating pressure ........................................................................................2000 pounds per square inch (psi)
(maximum permissible) ........................................................................................ (13,790 kilopascals [kPa])
Fluid flow (minimum) .......................................................................... 2.0 gallons per minute (gpm) @ 1400 psi
.......................................................................................................(7.6 liters per minute (Ipm) @ 9653 kPa)
Fluid flow (maximum) ......................................................................5.0 gpm © 1400 psi (18.9 Ipm @ 9653 kPa)
Wrench speed (maximum permissible) ......................................................2000 revolutions per minute (rpm)
Minimum torque output ......................................................... 50 pound-feet (lb-ft) (67.8 Newton-meters [Nom] )
Ambient operating temperature ........................................................25 degrees Fahrenheit (OF) (-31.7 degrees
(with proper oil viscosity) ............................................................................. Celsius [oC] ) to 115oF (46.1 oC)
Ambient storage (with proper oil viscosity) ......................................................-65oF (-53.9oC) to 155oF (68.4oC)
Operating oil .......................................................................................................................OE/HD-10, PE 10-1,
OHA, and OES
Weight with hoses and preservative oil ....................................................... 30 pounds (lb) (13.6 kilograms [kg])
Section III. PRINCIPLES OF OPERATION
1-11. MOTOR UNIT.
a.
Pressure on the on/off trigger (1) permits the flow of fluid from the high-pressure inlet line (2) through the motor
unit (3). The fluid pressure forces the gears (4 and 5) to rotate, providing clockwise or counterclockwise
operation of the hydraulic impact wrench, as controlled with the selector switch (6).
b.
As gear rotation continues, a quantity of fluid is displaced and carried to the opposite side of the motor unit (3),
where it is exhausted to the outlet return line (7). The rotation of gears (4 and 5) causes rotation of the assembly
shaft (8), which engages the upper end of the hammer (9), which in turn drives the anvil (10).
1-12. IMPACTING UNIT.
a.
At this point, the restrictive force of the object being tightened or loosened triggers the hydraulic impact function
of the wrench. The anvil (10) engages the hammer assembly (9) and the energy stored in the hammer assembly
is transmitted to the anvil, delivering an impact force to the object being turned.
1-4
|
