Ingersoll-Rand 7RAQT4 Tapper Setup guide

16572612
Edition 2
May 2014
Save These Instructions
Air Drill
7RAQT4 Tapper
Maintenance Information

2 16572612_ed2
Product Safety Information
WARNING
Failure to observe the following warnings, and to avoid these potentially hazardous situations, could result in death or serious
injury.
Read and understand this and all other supplied manuals before installing, operating, repairing, maintaining, changing accessories
on, or working near this product.
Always wear eye protection when operating or performing maintenance on this tool. The grade of protection required should be
assessed for each use and may include impact-resistant glasses with side shields, goggles, or a full face shield over those glasses.
Always turn o the air supply, bleed the air pressure and disconnect the air supply hose when not in use, before installing, removing
or adjusting any accessory on this tool, or before performing any maintenance on this tool or any accessory.
Note: When reading the instructions, refer to exploded diagrams in Parts Information Manual when applicable (see under Related Documentation for
form number).
•
•
•
•
Each time the Model 7RAQT4 Tapper is disassembled for
maintenance, repair or replacement of parts, lubricate the tool as
follows:
Motor
Use Ingersoll Rand No. 10 Oil for lubricating the motor. Inject a
few drops of oil into the air inlet before attaching the air hose.
2. Bearings
Fill the Bearings to 50% capacity with Ingersoll Rand No. 28
Grease.
1.
3. Bevel Gear
Apply light coat of Ingersoll Rand No. 67 Grease to bevel gear.
4. Gear Train
Single Reduction - Apply 4.5 - 6 cc of Ingersoll Rand No. 28
Grease.
Double Reduction - Apply 6 - 7.5 cc of Ingersoll Rand No. 28
Grease.
Disassembly
General Instructions
Do not disassemble the tool any further than necessary to replace
or repair damaged parts.
Whenever grasping a tool or part in a vise, always use leather-
covered or copper-covered vise jaws to protect the surface of
the part and help prevent distortion. This is particularly true of
threaded members and housings.
Do not remove any part which is a press t in or on a subassembly
unless the removal of that part is necessary for repairs or
replacement.
Do not disassemble the tool unless you have a complete set of
new gaskets and O-rings for replacement.
Disassembly of the Tool
Using two No. 7RAQT4-200 Tap Chuck Removal Wedges, remove
the Tap Chuck (59).
Lightly grasp the handle of the Motor Housing (1) in leather-
covered or copper-covered vise jaws so that the
Spindle (48) is upward.
NOTICE
Be careful not to drop the Planet Gears on the oor.
3. Using an adjustable wrench, grasp the ats on the Gear Case (57)
and unscrew the Gear Case from the Motor Housing. Lift the Gear
Case along with the gearing from the Motor Housing.
4. Remove the Motor Housing from the vise, and grasp the pinion
end of the Rotor (34) in the vise. Make certain to use leather-
covered or copper-covered vise jaws. Withdraw the motor from
the Motor Housing.
Disassembly of the Gearing
If the Bearing Housing Spacer (43) remained with the Gear
Case (57) when the tool was disassembled, slide it from the bore
of the Gear Case.
While holding the Gear Case vertically with the Spindle (48)
upward, tap the Case gently against the surface of a workbench
to jar the Gear Head (44), Gear Head Planet Gears (45) and Gear
Head Spacer (47) from the Gear Case.
Using a pair of snap-ring pliers, remove the Spindle Retainer (56)
from the Spindle (48).
While holding the Gear Case vertically with the Spindle upward,
tap the Case gently against the surface of a workbench to jar the
1.
2.
3.
4.
1.
2.
1.
2.
3.
4.
Spindle (48) and Spindle Planet Gears (49) from the Gear Case.
Using a pair of snap-ring pliers, remove the Spindle Bearing
Retainer (54) from the Gear Case.
Withdraw the Grease Shield (51) from the Gear Case.
Note that there is a Spindle Bearing Spacer (53) between the inner
rings of the two Spindle Bearings (52). If the Spindle Bearings are
to be removed, maneuver the Spindle Bearing Spacer so that it is
o center in relation to the Spindle Bearings and so that its split
ends do not show.
Stand the Gear Case, large end down, on the table of an arbor
press and using a 1/2”(13 mm) diameter dowel, carefully press
against the Spindle Bearing Spacer to remove the one Spindle
Bearing and the Spacer.
Using snap-ring pliers, remove the Spindle Bearing Seat (55) from
the Gear Case.
Using a sleeve that contacts the outer race of the bearing, press
the second Spindle Bearing from the Gear Case.
If the Spindle Planet Gear Bearings (50) and Gear Head Planet
Gear Bearings (46) are to be replaced, press the old bearings from
their respective Planet Gears.
Disassembly of the Motor
Slide the Front Rotor Bearing Housing (41) along with the two
Bearing Spring Washers (40) from the Front Rotor Bearing (39).
Grasp the pinion end of the Rotor in leather-covered or copper-
covered vise jaws so that the Rear End Plate is upward.
CAUTION
Make certain the End Plate Retainer (33) does not y o the
pliers when it is slipped o the hub of the Rotor.
3. Using a pair of external snap ring pliers with just the tips of the
pliers inserted between the ends of the End Plate Retainer, spread
the Retainer enough to remove it from the groove in the hub of
the Rotor.
4. Lift o the Rear End Plate, Cylinder (36) and Vanes (35).
5. Check the Front Rotor Bearing for damage or roughness. If
replacement is necessary, support the Front End Plate (37)
between two blocks of wood on the table of an arbor press, and
press the Rotor from the Front Rotor Bearing.
5.
6.
7.
8.
9.
10.
11.
1.
2.
Lubrication

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Disassembly of the Reverse Valve
Unscrew the Reverse Valve Cap (6) and remove the Reverse Valve
Spring (5). If the Reverse Valve Cap Seal (7) is damaged, remove it
from the recess in the Housing (1).
Thread a No. 8-32 thread cap screw into the top of the Reverse
Valve (4) and pull the Reverse Valve from the Motor Housing.
Disassembly of the Throttle Mechanism
NOTICE
A 10 mm hexagon socket ts the Actuating Valve Bushing (11).
Unscrew the Actuating Valve Bushing from the Motor Housing (1),
and remove the entire Actuating Valve Assembly and Actuating
Valve Spring (15).
1.
2.
1.
NOTICE
A 10 mm hexagon socket ts the Actuating Valve Cap (14).
2. Unscrew the Actuating Valve Cap.
3. Unscrew the Inlet Bushing (26) and remove the Inlet Bushing
Spacer (25), Air Strainer Screen (27), Muer Assembly (23),
Muer Element (24A), Throttle Valve Spring (22) and Throttle
Valve (19).
4. Withdraw the Trigger Assembly.
5. If the Throttle Valve Seat (20) and Throttle Valve Seat Support (21)
are to be replaced, withdraw them from the handle with a sti
wire hook.
Disassembly of the Pistol Grip Motor Housing
Grasp the handle of the Motor Housing (1) in leather-covered or
copper-covered vise jaws.
If the Rear Rotor Bearing (3) is to be replaced, remove the old
Bearing by threading a No. 10-24 thread cap screw into the
Bearing Ejecting Nut (2) and jack the Bearing from the Housing.
1.
2.
Assembly
General Instructions
Always press on the inner ring of a ball-type bearing when
installing the bearing on a shaft.
Always press on the outer ring of a ball-type bearing when
pressing the bearing into a bearing recess.
Whenever grasping a tool or part in a vise, always use leather-
covered or copper-covered vise jaws. Take extra care with
threaded parts and housings.
Except for bearings, always clean every part and wipe every part
with a thin lm of oil before installation.
Check every bearing for roughness. If an open bearing must be
cleaned, wash it thoroughly in a suitable cleaning solution and
dry with a clean cloth. Sealed or shielded bearing should never
be cleaned. Workgrease thoroughly into every open bearing
before installation.
Apply a lm of O-ring lubricant to all O-rings before installation.
Unless otherwise noted, always press on the stamped end of a
needle bearing when installing the needle bearing in a recess. Use
a bearing inserting tool similar to the one shown in Dwg. TPD786.
Needle Bearing inserting Tool
Shoulder to
Regulate Depth
Pilot to t I.D. of Bearing.
Length of Pilot to be
approximately 1/8” less than
length of Bearing
15°
(Dwg. TPD786)
Assembly of the Pistol Grip Motor Housing
If the Rear Rotor Bearing (3) was removed, install a new bearing.
Place the Bearing Ejecting Nut (2) in the small recess at the
bottom of the bore in the Motor Housing (1).
Using a bearing inserting tool that has a pilot to t the inside of
the Bearing, and a shoulder that contacts the outer radius on
1.
2.
3.
4.
5.
6.
7.
1.
2.
3.
the bearing shell, press the Rear Rotor Bearing, stamped end
trailing, into the bearing recess of the Motor Housing until it is
about 0.010” (0.25 mm) below ush. Inject 0.5 cc of grease into
the Bearing.
Assembly of the Throttle Mechanism
The Actuating Valve (9) can be assembled in either side of the
Motor Housing (1), depending upon operator preference.
NOTICE
A 10 mm hexagon socket will t the Actuating Valve Cap (14).
2. Install the Actuating Valve Cap Seal (16) on the Actuating Valve
Cap and thread the Cap into the side of the Motor Housing.
Tighten it to 4 to 6 ft-lb (5.4 to 8 Nm) of torque.
3. Install the Valve Bushing Seal (12) on the Actuating Valve
Bushing (11).
4. Install the Actuating Valve Face (10) in the groove on the
Actuating Valve (9), and insert the small end of the Actuating
Valve into the threaded end of the Bushing until it protrudes from
the opposite end.
5. Press the Actuating Valve Button (13) on the small diameter of the
Actuating Valve (9).
6. Place the Actuating Valve Spring (15) in the cross-bore of the
Motor Housing so that it enters the recess in the Actuating Valve
Cap.
NOTICE
A 10 mm hexagon socket will t the Actuating Valve Bushing.
7. Take the assembled Actuating Valve and Bushing, and thread
the Bushing into the cross-bore so that the end of the Actuating
Valve enters the bore of the Spring. Work the Actuating Valve a
few times to see that it functions smoothly. Tighten the Actuating
Valve Bushing to 4 to 6 ft-lb (5.4 to 8 Nm) of torque.
8. Change the position of the Motor Housing in the vise so that the
handle is vertical and the entrance to the handle upward.
NOTICE
The Throttle Valve Seat is symmetrical. If one side appears worn,
turn the Seat over so that the good side will face the Throttle
Valve (19).
9. Insert the Throttle Valve Seat Support (21) into the tapped bore of
the handle and follow it with the Throttle Valve Seats. Push them
into place with a 1/2”(13 mm) dowel.
10. Install the assembled Trigger (17) and Trigger Pin in the trigger
bushing.
11. Installation of the Throttle Valve is sometimes a bit tricky due to
the smallness of the Valve and the depth of the bore in which
1.

4 16572612_ed2
it is located. The dicult part is in holding the Valve while
inserting the long end of the valve stem through the hole in the
trigger stem. Although the Valve can be held with a push-button
mechanical drafting pencil or a wooden dowel, one of the easiest
ways to hold it is by using a common wooden pencil with rubber
eraser. Insert the short end of the valve stem into the rubber
eraser full depth; then back it out far enough so that the Valve
is just nicely supported. Insert the Valve into the bore of the
handle so that the long end of the stem enters the hole in the
Trigger Stem. Pull outward on the Trigger to hold the Valve while
removing the pencil.
12. Place the Air Strainer Screen (27), closed end rst, inside the large
end coil of the Throttle Valve Spring (22).
13. Insert the Throttle Valve Spring and Screen, small coil rst, into
the handle so that the slip-ring encircles the end of the Throttle
Valve.
14. Moisten the Muer O-ring (24) with O-ring lubricant, and slip it
over the perforated bae of the Muer (23).
15. Place the Muer on the face of the handle so that the perforated
bae extends into the handle.
16. Slide the Inlet Bushing Spacer (25) over the threaded end of the
Inlet Bushing (26), and install the Inlet Bushing in the handle.
Tighten it to 25 ft-lb (34 Nm) of torque.
Assembly of the Reverse Valve
Grasp the handle in leather-covered or copper-covered vise jaws
so that the bore of the Motor Housing is horizontal.
Slide the Reverse Valve (4), tapped end trailing, into the reverse
valve bushing.
Place the Reverse Valve Spring (5) on top of the Reverse Valve.
If the Reverse Valve Cap Seal (7) was removed, carefully snap a
new Seal in place on the rim of the reverse valve bushing.
Install the Reverse Valve Cap (6). Tighten it to 7 to 9 ft-lb (9.5 to
12 Nm) of torque.
Assembly of the Motor
Slide the Front End Plate (37), at side rst, over the splined end
of the Rotor (34).
Using a sleeve that contacts only the inner ring of the Front Rotor
Bearing (39), press the Bearing onto the splined hub of the Rotor
until it seats against the Front End Plate.
The clearance between the Front End Plate and Rotor is critical.
While holding the Front End Plate, gently tap the splined end of
the Rotor with a plastic hammer until you can insert a 0.001” feeler
gauge or shim between the face of the Rotor and End Plate.
Grasp the splined end of the Rotor in leather-covered or copper-
covered vise jaws so that the short hub of the Rotor is upward.
Place the Cylinder (36) down over the Rotor and against the Front
End Plate. The exhaust holes perpendicular to the cylinder axis
MUST be at the ve o’clock position when looking down through
the Cylinder at the Front End Plate.
Wipe each Vane (35) with a light lm of the recommended oil
and place a Vane in each slot in the Motor. Make certain the vane
slots are clean.
Place the Rear End Plate (32), at side rst, over the short hub of
the Rotor.
NOTICE
Make certain the Retainer does not y o the pliers as you slip it
on the hub of the Rotor.
8. Install the Rear End Plate Retainer (33) in the groove on the hub
of the Rotor.
Assembly of the Gearing
Using snap-ring pliers, install the Spindle Bearing Seat (55) in the
groove nearest the small end of the Gear Case (57).
Using a sleeve that contacts the outer ring of the bearing, press
the Spindle Bearing (52) in the Gear Case until it contacts the
Spindle Bearing Seat.
Place the Grease Shield (51), ange side rst, against the Spindle
Bearing.
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
6.
7.
1.
2.
3.
Using snap-ring pliers, install the Spindle Bearing Retainer (54) in
the groove in the Gear Case adjacent to the Grease Shield. Stand
the Gear Case on the table of an arbor press with the small end
upward.
Place the Spindle Bearing Spacer (53) on the inner ring of the
Spindle Bearing that has already been pressed into the Gear Case.
CAUTION
Do not press the second Spindle Bearing too far. Press it in only
far enough so that its inner ring contacts the Spindle Bearing
Spacer.
7. Using a sleeve that contacts the outer ring of the bearing,
carefully press the second Spindle Bearing into the Gear Case
until it contacts the Spindle Bearing Spacer.
8. Insert the Spindle (48), tapered end rst, into the threaded end of
the Gear Case (57) and through the bore of both Spindle Bearings
and the Spindle Bearing Spacer.
9. Using snap-ring pliers, install the Spindle Retainer (56) in the
groove on the Spindle.
NOTICE
Always press against the stamped end of the Bearing.
10. If the Spindle Planet Gear Bearings (50) or the Gear Head Planet
Gear Bearings (46) were removed from their respective Planet
Gears, press in new Planet Gear Bearings using a bearing
inserting tool that has a pilot that ts the bore of the Bearing and
a shoulder that contacts the outer radius of the Bearing. Press
all Bearings ush or slightly below ush with the face of their
respective Planet Gear. Work some grease into each Bearing.
11. Work some of the recommended grease into the gear teeth
inside the Gear Case.
12. Place a Spindle Planet Gear (49) on each planet gear shaft.
13. Place the Gear Head Spacer (47) inside the Gear Case against the
face of the Spindle Planet Gears.
14. Work some grease into the gear teeth on the Gear Head (44) and
insert the Gear Head, pinion end rst, in the Gear Case so that it
meshes with the Spindle Planet Gears.
15. Place a Gear Head Planet Gear (45) on each planet gear shaft.
16. Insert the Bearing Housing Spacer (43) in the Gear Case so that it
seats against the internal gear teeth.
Assembly of the Tool
Position the Rear End Plate Gasket (31) in the bottom of the bore
of the Motor Housing (1) so that the dowel hole and air inlet ports
in the Gasket align with those in the Motor Housing.
Using an assembly dowel 3/32”x 10” (2.3 mm x 254 mm), align
the dowel groove in the Front End Plate (37), Cylinder (36) and
Rear End Plate (32). Place the assembly rod in the aligned grooves
so that about 3” (75 mm) of the rod extends beyond the Rear
End Plate. Insert the extension into the dowel hole in the Motor
Housing and slide the motor into the Motor Housing until it seats.
Withdraw the assembly dowel and insert the Cylinder Dowel (38).
When properly positioned, the Cylinder Dowel should be slightly
below the surface of the Front End Plate.
Place the two Bearing Spring Washers (40) inside the Front Rotor
Bearing Housing (41).
Slide the Front Rotor Bearing Housing over the Front Rotor
Bearing.
Thread the assembled Gear Case (57) onto the Motor Housing,
and tighten it to 40 ft-lb (54 Nm) of torque. Run the motor at
reduced air pressure while tightening the Gear Case. Listen to
make certain there is non scoring.
Wipe the tapered section of the Spindle (48) and Tap Chuck (59)
clean and dry, and install the Tap Chuck on the Spindle.
4.
5.
1.
2.
3.
4.
5.
6.
7.

16572612_ed2 5
Troubleshooting Guide
Trouble Probable Cause Solution
Loss of Power Low air pressure Check air supply. For top performance, the air
pressure must be 90 psig (6.2 bar/620 kPa) at the
inlet.
Plugged Air Strainer Screen or Inlet Screen Clean the Air Strainer or Inlet Screen in a
clean, suitable, cleaning solution. If the Screen
cannot be cleaned, replace it.
Clogged Muer or Exhaust Silencer Clean the Muer Element in a clean, suitable,
cleaning solution. If it cannot be cleaned, replace it.
Worn or broken Vanes Replace the complete set of Vanes.
Damaged Rear End Plate Gasket Install a new Rear End Plate Gasket.
Worn or broken Cylinder Replace the Cylinder if it is cracked or if the
bore appears wavy or scored.
Improper lubrication or dirt build-up Clean the Motor Unit parts and lubricate as
instructed.
Leaky Throttle Valve Worn Throttle Valve and/or Throttle Valve Seat Install a new Throttle Valve and/or a
Throttle Valve Seat.
Dirt accumulation on Throttle Valve and/or
Throttle Valve Seat
Pour about 3 cc of a clean, suitable, cleaning
solution in the air inlet and operate the tool
Valve for about 30 seconds. Immediately pour 3 cc
of the recommended oil in the air inlet and operate
the tool for 30 seconds to lubricate all the cleaned
parts.
Tool will not function in reverse Contamination in air-thrown Reverse Valve
chamber
Clean all reverse valve parts in a clean, suitable,
cleaning solution.
Damaged parts Replace any parts that are damaged or worn.
Related Documentation
For additional information refer to:
Product Safety Information Manual 04580353.
Product Information Manual 16572273.
Parts Information Manual 16572810.
Manuals can be downloaded from ingersollrandproducts.com

Notes

Notes

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