8
PNEUMATIC INFORMATION, Continued
COLD WEATHER OPERATION
If a tool does not operate satisfactorily in freezing temperatures, certain steps can correct the
problem. The following steps can be taken to improve cold weather operation of the tool:
a. An air line dryer adjacent to the compressor.
b. Use lubricant recommended by Signode. Signode has tested the use of anti-freezes, none
work well in air tools; the tool will gum up when anti-freezes are introduced and will not
function properly. The best lubricant for freezing weather is the 1 to 1 oil and kerosene
combination.
c. If possible, run the air supply line to a indoor located Filter-Regulator-Lubricator or relocate
the F-L-R to a warmer operating area.
AIR PRESSURE vs. STRAP TENSION
A minimum air pressure setting of 70 psig must be maintained to ensure that the tool will seal
properly. Input air pressure to tool must not exceed 90 psig. Strap tension is controlled by air
pressure. Use the proper air line piping and lubrication as specified in this manual. Your air
pressure gauge must be accurate, therefore, confirm its accuracy by comparing it to a calibrated
master gauge.
Adjust the pressure regulator to achieve the tensions listed below. Once the regulator is set, the
tension levels will be consistent on all straps, provided the operator allows the air motor to stall.
If the air pressures do not result in tension levels that satisfy the needs of the application, then
increase the air pressure in increments of 5 psig until the desired tension level has been
achieved.
STRAP TENSION
Strap breakage hazard. Increasing the tension can result in strap breakage. 1-1/4" Strap can
break during tensioning if inlet air pressure exceeds 90 psig (6.1 BAR). Maximum operating
air pressure is 90 psig (6.1 BAR). Never remove the adjusting screw from the tool with the
air connected. The screw could become a flying projectile. Failure to follow the above could
result in serious personal injury.
Strap tension is accurately controlled by air pressure to the tool and the setting of the adjusting
screw. Once the desired inlet air pressure and the adjusting screw settings have been
established, tension will be uniformed on all straps.
The PRHR tool has been factory adjusted to draw 1400 lbs. (6216 N) of tension at 90 psig (6.1
BAR). A minimum of 70 psig (4.8 BAR) is required to ensure that the tool will seal properly.
To adjust the tension:
1. Make sure the air pressure is set between 70 and 90 psig (4.7 an 6.1 BAR).
2. Loosen the hex nut (81) and turn the adjusting screw (80) clockwise to decrease tension and
counterclockwise to increase tension.
3. Retighten the hex nut.
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