MT1857A 3 05/09/14
OPERATION
The 3/8" ratchet is designed to fasten and unfasten threaded fasteners
while operating under recommended conditions . Note the directional
setting of the reversing lever before depressing the throttle . Ensure
body stance to be in excellent balance and have full control of the tool
before use . Be fully alert as sudden reaction torques and directional
changes may unexpectedly occur . Be aware that air ratchets are not
torque wrenches or pry bars . Joints and fasteners requiring a specific
torque must be checked with a torque wrench as the final step . Using
the air ratchet while the power is in the "off" position, to tighten or
break-free fasteners, can irreversibly damage its internal mechanism
and will void any remaining warranty .
Always turn off the air supply, drain hose of air pressure and detach tool from
air supply before installing, removing or adjusting any part or accessory on
this tool, or before performing any maintenance on this tool .
AIR SUPPLY
Tools of this class operate on a wide range of air pressures. It is
recommended that air pressure of these tools measures 90
PSIG at the tool with the trigger fully depressed and no load
applied to the tool. Higher pressure and unclean air will shorten
tool life and may create a hazardous condition.
Water in the air line will cause damage to the tool. Drain water
from air lines and compressor prior to running tool. Clean the air
inlet filter screen weekly. The recommended hook-up procedure
can be viewed in Figure 1.
The air inlet (Figure 2), used for connecting air supply, has
standard 1/4" NPT American Thread.
Line pressure should be increased to compensate for unusually
long air hoses (over 25 feet). Minimum hose diameter should be
3/8" I.D. and fittings should have the same inside dimensions.
Ensure an accessible emergency shut off valve has been installed
in the air supply line and make others aware of its location.
TROUBLESHOOTING
Other factors outside the tool may cause loss of power or erratic
action. Reduced compressor output, excessive drain on the air line,
moisture or restrictions in air pipes or the use of hose connections
of improper size or poor conditions may reduce air supply. If
outside conditions are in order, and the tool still performs
erratically, disconnect tool from hose and take tool to your
nearest Matco authorized service center.
LUBRICATION & MAINTENANCE
Lubricate the tool daily with a high quality grade of air tool oil. If no
air line oiler is used, run 1/2 ounce of oil through the tool. The oil
can be squirted into the tool air inlet Figure 2, or into the hose at
the nearest connection to the air supply, then run the tool. A rust
inhibitive oil is acceptable for air tools. Grease fitting on
yoke occasionally to ensure proper lubrication of the ratchet
mechanism.
After an air tool has been lubricated, oil will discharge through
the exhaust port during the first few seconds of operation. The
exhaust port must be covered with a towel before applying air
pressure to prevent serious injury.
FIG. 1
FIG. 2
AIR INLET
TRIGGER
FEATURES
• High powered motor delivers up to 60 Ft. Lbs. of maximum torque
• Rotating center handle exhaust keeps exhaust air away from the user
• Stepless variable speed throttle for total user versatility
• Matco patented grease fitting in the yoke, provides easier maintenance to the head, and added durability
• Chrome molly ratchet yoke for added durability
MT1857A 3/8" Air Ratchet
Drain Daily
Regulator
Oiler
Quick Coupler
Leader
Hose
Nipple
Do Not Install
Quick Coupling
Here
Nipple
Filter
Air Supply
Whip Hose
FORWARD/REVERSE
WARNING
