23
CLUTCH SPRING SELECTION CHART
TORQUE RANGE (Soft Draw)
Tool
Free Speed
(rpm)
Light Clutch Spring
(Yellow)
Medium Clutch Spring
(Red)
All Series QA High Torque Angle
Screwdrivers and Angle
500
11.7 to 38.2 in–lbs.
(1.32 to 4.32 Nm)
31.0 to 88.3 in–lbs.
(3.50 to 9.98 Nm)
Wrenches
250
11.7 to 38.2 in–lbs.
31.0 to 88.3 in–lbs.
(1.32 to 4.32 Nm)
(3.50 to 12.46 Nm)
MAINTENANCE SECTION
Always wear eye protection when operating or
performing maintenance on this tool.
Always turn off the air supply and disconnect the air
supply hose before installing, removing or adjusting
any accessory on this tool, or before performing any
maintenance on this tool.
LUBRICATION
Each time a Series QA Angle Wrench or Angle
Screwdriver is disassembled for maintenance and repair
or replacement of parts, lubricate the tool as follows:
1.
Coat all exposed gears with Ingersoll–Rand No. 67
Grease and work some of the Grease into the gearing
of the Angle Housing (100).
2.
Work approximately 6 to 8 cc of Ingersoll–Rand
No. 28 Grease into the ball pockets, jaws, adjusting
nut lock and shaft threads of the clutch mechanism.
3.
Use Ingersoll–Rand No. 10 Oil to lubricate the motor.
Inject approximately 1 to 2 cc of oil into the air inlet
before attaching the air hose to the tool.
SPEED ADJUSTMENT
In addition to adjustable clutches for controlling torque,
Series QA Angle Wrenches and Angle Screwdrivers are
furnished with the ability to precisely control speed,
within certain ranges. Setting the speed requires a
tachometer. Therefore, the adjustment, although simple,
should only be attempted by a competent technician using
the proper equipment.
The Back Cap (7) has a small, molded stud on the end
face of the Cap nearest the Exhaust Diffuser (16). That
stud controls the radial location of the Diffuser which
controls the opening size of the exhaust ports. Take an
initial reading of the tool speed by applying a tachometer
to the end of the Spindle (113). Using the procedure
required to activate the motor of your particular model
tool, bring the motor to maximum free speed.
After determining the actual velocity, shut off the air
supply and disconnect the air line. Use a 3/4” wrench to
loosen the Inlet Bushing. The longest slot in the Exhaust
Diffuser will contain the molded stud on the Back Cap.
Rotate the Diffuser to open the exhaust ports to increase
speed or rotate it to restrict the exhaust to reduce speed.
Being careful not to allow the Diffuser to damage the
molded stud, tighten the Inlet Bushing to 15 ft–lbs.
(20 Nm) torque. Connect the air line and restore the air
supply and check the velocity again. Determine which
direction you need to rotate the Diffuser to obtain the
desired speed and then rotate it accordingly. Best results
are achieved by using gradual increments and frequent
tachometer readings. Be sure to turn off the air supply
and disconnect the line when making adjustments.
DISASSEMBLY
General Instructions
1.
Do not disassemble the tool any further than
necessary to replace or repair damaged parts.
2.
Whenever grasping a tool or part in a vise, always use
leather–covered or copper–covered vice jaws to
protect the surface of the part and help prevent
distortion. This is particularly true of threaded
members and housings.
3.
Do not remove any part which is a press fit in or on a
subassembly unless the removal of that part is
necessary for repairs or replacement.
4.
Do not disassemble the tool unless you have a
complete set of gaskets and o–rings for replacement.
Disassembly of the Tool
Each Series QA Angle Wrench or Angle Screwdriver is
made up of modules or units. These units can be
disassembled for repair or service without affecting
remaining units that require no service. The same
modules are not included in every model. To separate the
modules, proceed as follows:
1.
Lightly grasp the hex body portion of the Angle Head
(100) in copper–covered or leather–covered vise jaws
in a manner that provides access to the Coupling Nut
(104).
