10 ► ID07 User Manual
WRENCH TORQUE INFORMATION
FACTORS THAT AFFECT TORQUE
An impact wrench is a rotary hammer that impacts the
head of a bolt or nut. It does not apply a slow steady
torque as a standard torque wrench. Therefore, sever-
al factors affect the result of torque when using impact
wrenches:
1. LONG BOLTS. Long bolts having high-friction
threads with lubrication under the bolt head or as-
sociated nut can twist when impacted, then untwist
before the next impact. This will especially happen if
there is low friction between the bolt head or nut and
the mating surface.
2. HEAVY, LOOSE OR MULTIPLE ADAPTERS.
Heavy, loose or multiple adapters between the
wrench and socket can dissipate the intensity of the
impact to the bolt head or nut.
3. AMOUNT OF IMPACT. Maximum torque results can
be obtained by allowing continuous impacting of the
socket against the bolt head or nut for at least 10
seconds.
4. HYDRAULIC FLOW RATE. If the ow rate to the
tool is too low, the hammer (or impact) speed is re-
duced. If the ow is correct, a change in the relief
pressure does not affect the impact force. Poorly
designed hydraulic circuits can result in lower ow
rates and reduced impact speeds when pressure is
required during impacting.
BOLT GRADE AND THREAD
RECOMMENDATIONS
Allowable bolt torque is limited by both bolt thread di-
ameter and grade of steel in the bolt. The ID07 Impact
Wrench is recommended for use on the following bolt
grade and thread sizes:
SAE Grade 2 7/16 to 7/8 inch / 11 to 22 mm
SAE Grade 5 3/8 to 5/8 inch / 9 to 16 mm
SAE Grade 8 3/8 to 9/16 inch / 9 to 4 mm
PREOPERATION PROCEDURES
CHECK POWER SOURCE
1. Using a calibrated ow meter and pressure gauge,
check that the hydraulic power source develops a
ow of 4–12 gpm/15–45 lpm at 2000 psi/140 bar.
2. Make certain that the hydraulic power source is
equipped with a relief valve set to open at 2100
psi/145 bar minimum.
OPEN-CENTER (OC) OR CLOSED-CENTER
(CC) OPERATION
The ID07 can be congured to run on OC or CC circuits.
1. Determine the system type.
2. Remove the hex plug (44) from the spring cap.
FOR OPEN-CENTER OPERATION:
Using a 3/16 in. hex, reach through the hole in the spring
cap and turn the selector screw counter-clockwise until
meeting resistance (from the retaining ring). Turn the se-
lector clockwise and then counter-clockwise to be sure
the selector is being stopped by the retaining ring. Do
not force the selector screw. Open-center operation is
now selected.
FOR CLOSED-CENTER OPERATION:
Using a 3/16 in. hex, reach through the hole in the spring
cap and turn the selector screw fully clockwise. When
the selector screw bottoms. Closed-center operation is
now selected.
WARNING
To prevent damage to the retaining ring, do not
attempt to force the selector screw counter-clockwise
beyond the point of initial resistance.
Reinstall the hex plug. Failure to install the plug may in-
troduce contaminants to the spool bore resulting in re-
placement of the valve spool and main housing.
CONNECT HOSES
1. Wipe all hose couplers with a clean, lint-free cloth
before making connections.
2. Connect hoses from the hydraulic power source to
the tool ttings or quick disconnects. It is good prac-
tice to connect the return hose rst and disconnect it
last to minimize or eliminate trapped pressure within
the wrench.
3. Observe the ow indicators stamped on the main
body assembly and the hose couplers to ensure
that the ow is in the proper directions. The female
couple on the tools “IN” port is the inlet (pressure)
coupler.
OPERATION
