MT2748, MT2748G, MT2748M
3
rev. 11/18/19
POWER MANAGEMENT SYSTEM
AND TOOL OPERATION
This tool includes a power management system that allows the operator
to adjust the amount of output power in the clockwise direction (forward).
There is no power management system present in the counter-clockwise
direction (reverse). To adjust the power output in the forward direction
,
turn the dial left or right to the desired power setting. Power output is
indicated by enla
rging black swoosh on back housing. Lowest power
setting indicated by thin swoosh area with highest power setting being
thickest swoosh area.
The Power management system is only for reference and does not act
as specific power settings. This tool includes a tip valve variable speed
trigger design that further allows the operator to reduce the power
output.
This tool is an impacting tool and not a torque meter. When specific
torque is required, it must be checked with a torque meter after fitting the
fastener with the Impact.
If a fastener does not move within five seconds, use a larger size Impact.
Do not use Impact Wrench beyond rated capacity, as this can drastically
reduce the tool life.
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.
NOTE:
Actual torque on a fastener is directly related to joint hardness,
tool speed, condition of socket and the time the tool is allowed to impact.
Use the simplest possible tool-to-socket hook up. Every connection
absorbs energy and reduces power.
NOTE: During operation, safety goggles must always be worn to guard
against flying debris (users and bystanders).
MT2748 3/8" IMPACT WRENCH
FIG. 1
FIG. 2
Drain Daily
Regulator
Oiler
Quick Coupler
Leader
Hose
Nipple
Do Not Install
Quick Coupling
Here
Nipple
Filter
Air Supply
Whip Hose
AIR INLET
TRIGGER
AIR SUPPLY
Tools operate on a wide range of air pressures. It is recommended
that air pressure measures 90 psig at the tool with the trigger fully
depressed and no load applied to the tool. Higher pressure (over 90
psig; 6.2 bar) raises performance beyond the rated capacity of the tool,
which will shorten tool life and could cause injury.
Always use clean, dry air. Dust, corrosive fumes and/or water in the air
line will cause damage to the tool. Drain the water from air lines and
compressor prior to running tool. Clean the air inlet filter screen weekly.
The recommended hookup procedure can be viewed in the below
figure.
The air inlet used for connecting air supply has standard 1/4" NPT. 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 and be tightly secured.
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. Grit or gum
deposits in the tool may cut power and may be corrected by cleaning
the air strainer and flushing out the tool with gum solvent oil or an equal
mixture of SAE #10 and kerosene. If outside conditions are in order,
disconnect tool from hose and take tool to your nearest authorized
service center.
LUBRICATION & MAINTENANCE
Lubricate the air motor daily with high quality air tool oil. If no air line
oiler is used, run 1/2 oz. of oil through the tool. The oil can be squirted
into the tool air inlet 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.
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.
WARNING
WARNING
FORWARD/REVERSE BUTTON
