Ingersoll-Rand 7LN3A44 User manual

16572638
Edition 2
May 2014
Save These Instructions
Air Drill
7L Series
Maintenance Information

2 16572638_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 Manuals when applicable (see under Related Documentation
for form numbers).
•
•
•
•
Each time the Series 7L Angle Drills are disassembled for
maintenance, repair or replacement of parts, lubricate the tool as
follows:
1. 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. Gearing
For models with H, J, K or L gearing, inject approximately 6 cc
of Ingersoll Rand No. 28 Grease into the Grease Fitting (40).
For models with M or N gearing, inject approximately 9 cc of
Ingersoll Rand No. 28 Grease into the Grease Fitting (40).
3. Angle Head
For models with 7L1A1, 7L1A3, 7L1A4, 7L1B1 and 7L1B4
Angle Attachment, after each 8 hours of operation,
inject 0.5 - 1.0 cc of Ingersoll Rand No. 67 Grease into Grease
Fitting (102).
For models with 7L2A4 or 7L3A4 Angle Attachment, after
each 40 hours of operation, inject 0.5 - 1.0 cc of Ingersoll Rand
No. 67 Grease into Grease Fitting (102).
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 Angle Attachment
1. Remove the Drill Chuck by inserting the Chuck Key in one of the
holes in the Chuck and rapping the Key sharply with a hammer.
2. Carefully grasp the ats of the Coupling Nut (124) in leather-covered
or copper-covered vise jaws, Angle Head (101) facing down.
NOTICE
The Gear Case (39) has left-hand threads.
3. Using a wrench on the ats of the Gear Case, loosen the Gear
Case from the Coupling Nut.
NOTICE
Remove the tool from the vise. Unscrew and remove the
Coupling Nut from the Gear Case.
4. Carefully grasp the Angle Head (101) in leather-covered or
copper-covered vise jaws, Spindle (122) facing upward.
NOTICE
The Spindle Bearing Cap (121) has left-hand threads.
NOTICE
Do not remove the Spindle from the Angle Head until the Bevel
Pinion (122) is pulled outward against the Bevel Pinion Bearing
(109). Failure to do so could damage the Spindle Upper Bearing
(105), the Bearing will not be removable from the Spindle, or
the Bevel Pinion will be damaged. If tightness or binding occurs.
Check to make sure the Bevel Pinion as been pulled outward.
1.
2.
3.
4.
5. For 7L1A1 or 7L1A3 Angle Head, using a wrench, remove the
Spindle Bearing Cap.
NOTICE
The Spindle Bearing Cap has left-hand threads. For 7L2A4 Angle
Head, use a wrench to remove the Spindle Bearing Cap. Withdraw
the Spindle from the Angle Head.
NOTICE
The Spindle Bearing Cap has left-hand threads.
For 7L3A4 Angle Head, use No. 8SA32-26 Bearing Cap Wrench to
remove the Spindle Bearing Cap Withdraw the Spindle from the
Angle Head.
For 7L1B1 Angle Head, use a thin blade screwdriver to pry out
and under the tab of the Lower Spindle Bearing Retainer (119A).
Rotate the screwdriver around the Spindle to spiral the retainer
out of its groove.
NOTICE
Do not remove the Spindle from the Angle Head until the Bevel
Pinion (108) is pulled outward against the Bevel Pinion Bearing
(109). Do not remove the Spindle unless a new Lower Spindle
Bearing (119) is available for installation. This type of bearing
is always damaged during removal and the bearing must be
removed with the Spindle. Each 7L1B1-955 Bearing Inserting
Tool includes tooling to remove the Spindle and Lower Spindle
Bearing from the 7L1B1 Angle Head. See Dwg. TPD792.
Lubrication

16572638_ed2 3
Jacking Bolt
Jacking Nut
Bearing Removal Sleeve
Pull Bevel Pinion back
before removing Spindle
(Dwg. TPD792)
Install the Jacking Nut on the Jacking Bolt near the head of the
Bolt. Position the Bearing Removal Sleeve on the face of the
Angle Head with the large open end toward the Spindle. With
the Angle Head nested in the shallow counterbore of the Sleeve,
screw the Jacking Bolt into the Spindle through the Sleeve. While
keeping the Jacking Bolt stationary with a wrench on the head of
the Bolt, use another wrench to rotate the Jacking Nut clockwise
pulling the Spindle, Lower Spindle Bearing and Spindle Upper
Bearing (105) from the Angle Head.
6. Inspect the Lower Spindle Bearing for looseness or roughness. If
either of these conditions exists, replace the bearing as follows:
For 7L1A1, 7L1A3 or 7L1B1 Angle Head, slip the Lower
Spindle Bearing from the Spindle.
For 7L2A4 Angle Head, grasp the threaded end of the
Spindle in leather-covered or copper-covered vise jaws.
Unscrew the Bevel Gear Retainer (120) and lift o the Bevel
Gear (107).
Press the Spindle from the Lower Spindle Bearing.
For 7L3A4 Angle Head, remove the Bevel Gear Retainer.
Press o the Bevel Gear. Press the Spindle from the Lower
Spindle Bearing.
NOTICE
Do not remove the Spindle Upper Bearing unless you have a new
bearing ready to install. This type of bearing is always damaged
during the removal process.
NOTICE
7L3A4 Angle Head will require a new Angle Housing
Cap (103) when the Spindle Upper Bearing is installed.
7. For 7L1A1, 7L1A3 or 7L1B1 Angle Head, if the Spindle Upper
Bearing appears rough or loose, press or pull it o the Spindle.
For 7L2A4 or 7L3A4 Angle Head, if the Spindle Upper
Bearing (104) appears rough or loose, press it from the Angle Head.
8. Remove the Bearing Seat Retainer (110) and slide o the Rear
Thrust Bearing Seat (111), Bevel Pinion Thrust Bearing (112) and
Front Thrust Bearing Seat (113) from the pinion shaft.
9. For 7L2A4 Angle Head, use snap ring pliers to remove the Pinion
Bearing Spacer Retainer (114). Remove the Bevel Pinion Bearing
Spacer (116).
10. For 7L3A4 Angle Head, use a thin blade screwdriver to pry out
and under the tab of the Pinion Bearing Spacer Retainer. Rotate
the screwdriver around the pinion shaft to spiral the retainer out
of its groove. Using a hooked tool, reach into the Bevel Pinion
Bearing Spacer (116) and hook the drilled cross-hole in the
Spacer. Pull the Spacer from the Angle Head. Remove the Rear
Seal (117) and Front Seal (118).
NOTICE
Do not remove the pinion shaft and bearing unless you have
a new bearing on hand. After the Angle Head is disassembled,
check all parts for damage or wear.
a.
b.
c.
d.
e.
f.
11. Grasp the spline of the pinion shaft in leather-covered or copper-
covered vise jaws and gently tap the rear face of the Angle Head
with a soft hammer to pull the Bevel Pinion Bearing.
Disassembly of Gearing
1. Using a pin punch and hammer, drive out the Throttle Lever
Pin (4) to release the Throttle Lever (3).
2. Make a set of hardwood Blocks. See Dwg. TPD681.
1/8”
(3.2 mm)
1 - 3/4” to 1 - 25/32”Dia.
(44.5 mm) to (45.2 mm)
Saw Cut
3 - 1/2”
(89 mm)
3 - 1/2”
(89 mm)
2 - 3/8”
(60 mm)
(Dwg. TPD681)
3. Place the hardwood blocks around the Motor Housing (1).
4. With the Motor Housing in a vertical position and Gear Case (39)
upward, securely clamp the blocks in a vise taking care not to
distort the Motor Housing.
NOTICE
This Gear Case has left-hand threads.
5. Using a wrench on the ats of the Gear Case, loosen, but do not
remove, the Gear Case.
NOTICE
Be certain to hold the Angle Drill over the workbench so that
you will not lose any parts.
6. Remove the tool from the vise and, while holding the Angle Drill
horizontally, carefully unscrew the Gear Case by hand and pull it
away from the Motor Housing.
7. If the Bearing Housing Spacer (29) remained in the Gear Case (39),
remove it from the Gear Case.
8. For H, J, M or N ratio, the Rotor Pinion (33) and Rotor Pinion
Spacer (34) may come out with the Spindle, or they may have
remained with the Rotor (20) when the Gear Case was removed.
Remove the Rotor Pinion and Rotor Pinion Spacer.
9. For H, J, K or L ratio, remove the Spindle Planet Gears (31).
Position the Gear Case vertically in an arbor press, planet gear
end down. Using a brass rod and contacting the end of the
Spindle, press the Spindle from the Gear Case.
For M or N ratio, remove the Planet Gears (36), Gear Head (35),
Gear Head Spacer (33) and Spindle Planet Gears (31). Position
the Gear Case vertically in an arbor press, Planet Gear end down.
Using a brass rod and contacting the end of the Spindle, press the
Spindle from the Gear Case.
10. Using snap ring pliers, remove the Spindle Bearing Retainer (43).
11. Remove the Spindle Bearing (42) from the Gear Case.
12. Withdraw the Grease Shield (41) from the Gear Case.
Disassembly of Motor and Throttle
1. If the Bearing Housing Spacer (29) remained with the Front Rotor
Bearing Housing, remove it from the Housing.
2. Remove the Front Rotor Bearing Housing (27) and the two
Bearing Spring Washers (26).
3. Grasp the splined end of the Rotor (20) and pull the assembled
motor from the Motor Housing (1).
4. Remove the Rear End Plate Gasket (17) from the Motor Housing.

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General Instructions
1. Always press on the inner ring of a ball-type bearing when
installing the bearing on a shaft.
2. Always press on the outer ring of a ball-type bearing when
pressing the bearing into a bearing recess.
3. 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.
4. Always clean every part and wipe every part with a thin lm of oil
before installation.
5. Check every bearing for roughness. If an open bearing must be
cleaned, wash it thoroughly in a clean, suitable, cleaning solution
and dry with a clean cloth. Sealed or shielded bearing should
never be cleaned. Work grease thoroughly into every open
bearing before installation.
6. Apply a lm of O-ring lubricant to all O-rings before nal
assembly.
7. 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 in Dwg. TPD786.
Needle Bearing Inserting Tool
Shoulder to
regulate Depth
15°
Pilot to t I.D. of
Bearing. Length of Pilot
to be approximately 1/8”
less than length
of Bearing
(Dwg. TPD786)
Assembly of the Retaining Mechanism
1. If the Rear Rotor Bearing (2) was removed, install a new one as
follows:
Using a bearing inserting tool (See Dwg. TPD786) that has a
pilot extending into the Bearing, and a shoulder that contacts
the outer radius on the bearing shell, press the Rotor Bearing,
closed end rst, into the bearing recess of the Motor
Housing (1) until it is about .010” (0.25 mm) below ush.
Inject 0.5 cc of grease into the Bearing.
2. Using hardwood blocks placed around the Motor Housing
(See Dwg. TPD681), clamp the blocks in a vise, positioning the
handle so the inlet is upward.
NOTICE
Make sure the reverse side of the Throttle Valve Seat (6) when
disassembling now becomes the side facing the inlet.
3. If the Throttle Valve Seat was removed, use a at-faced
rod 1/2”(13 mm) in diameter by 3” (75 mm) long to press the
Throttle Valve Seat into the handle until it seats.
4. Install the Throttle Valve Plunger (5) until the hole in the Plunger
aligns dead center with the hole in the Throttle Valve Seat.
5. Using needle nose pliers to hold the short-stem end of the
Throttle Valve (7), install the Valve long-stem end through the
hole in the Throttle Valve Seat and the Throttle Valve Plunger.
6. Install the Muer Element (13) by wrapping it horseshoe fashion
around the inside of the Exhaust Deector (12).
7. Snap the Exhaust Silencer (11) into the large open end of the
Exhaust Deector.
8. Install the Exhaust Deector Seal (10) into the groove on the front
end of the Exhaust Deector.
9. Install the Silencer Seal Ring (9) over the hub of the Motor
Housing and ush with the base of the hub.
NOTICE
Tabs on the Exhaust Deector and notches in the Motor
Housing are designed so they can only be mated correctly.
10. Install the Exhaust Deector over the hub of the Motor Housing,
aligning the tabs on the Exhaust Deector with the notches in the
Motor Housing.
11. Insert the Air Strainer Screen (16), closed end rst, inside the
external threaded end of the Inlet Bushing (15).
12. Insert the Throttle Valve Spring (8), large coil end rst, into the
Inlet Bushing making sure it is ush with the Air Strainer Screen.
13. Install the Inlet Bushing Spacer (14) over the threaded end of the
Inlet Bushing.
a.
b.
Assembly
NOTICE
Make certain the End Plate Retainer (19) does not y when it is
slipped o the hub of the Rotor.
5. Using a pair of external snap-ring pliers with just the tips of the
pliers inserted between the ends of the End Plate Retainer (19),
spread the Retainer enough to remove it from the groove in the
hub of the Rotor.
6. Remove the Rear End Plate (18), Cylinder (22) and Vanes (21).
NOTICE
Do not remove the Rear Rotor Bearing (2) unless you have a
new bearing on hand for replacement. The old bearing will be
damaged during the removal process.
7. Check the Front Rotor Bearing (23) for wear or roughness. If
replacement is necessary, support the Front End Plate (23)
between two blocks of wood on the table of an arbor press. Press
the Rotor from the Front Rotor Bearing.
8. To remove the Rear Rotor Bearing, refer to step 15.
9. Using hardwood blocks placed around the Motor Housing (see
Dwg. TPD681), clamp the blocks in a vise, positioning the handle
so the inlet is upward.
10. Using a wrench on the ats, unscrew and remove the Inlet
Bushing (15).
11. Remove the Throttle Valve Spring (8) and Air Strainer Screen (16).
12. Remove the Exhaust Deector (12), Inlet Bushing Spacer (14),
Exhaust Silencer (11), Muer Element (13), Exhaust Deector
Seal (10) and Silencer Seal Ring (9).
13. Lift out the Throttle Valve (7) and the Throttle Plunger (5).
NOTICE
The Throttle Valve Seat (6) is reversible. Mark the side of the
Throttle Valve Seat so the side that faced up toward the inlet will
be the underside on reinstallation.
14. If removal of the Throttle Valve Seat is necessary, use a hooked
tool to pull the Seat from the Housing.
15. To remove the Rear Rotor Bearing, proceed as follows:
Insert a 1/4” (6 mm) diameter by 6” (152 mm) long, at faced
steel rod into the air inlet until it contacts the Rear Rotor
Bearing.
Press the end of the steel rod to remove the Rear Rotor
Bearing out of the front end of the Motor Housing.
a.
b.

16572638_ed2 5
14. Thread the Inlet Bushing into the Motor Housing, making certain
the Throttle Valve Spring encircles the short-stem end of the
Throttle Valve. Tighten the Inlet Bushing to a minimum
of 25 ft-lb (33.9 Nm) torque.
NOTICE
The throttle lever pin hole is stepped on the left side of the
Exhaust Deector, when facing the air inlet end of the tool, for
ease of installation of the Throttle Level Pin (4). Operate the
Lever to check for free movement.
15. Install the Throttle Lever (3) from left to right using the Throttle
Lever Pin.
16. Slide the Front End Plate (23), at side rst, over the splined end
of the Rotor (20).
17. Using a sleeve that contacts only the inner ring of the Front Rotor
Bearing (25), press the Front Rotor Bearing onto the splined hub
of the Rotor until it seats against the Front End Plate.
18. The clearance between the Front End Plate and the Rotor is
critical. While holding the Front End Plate, gently tap the splined
end of the Rotor until you can insert a 0.001” feeler gauge or shim
between the face of the Rotor and End Plate.
19. Grasp the splined end of the Rotor in copper-covered vise jaws so
the short hub of the Rotor is upward.
20. Wipe each Vane (21) with a lm of the recommended oil and
place a Vane in each slot in the Rotor.
21. For 7LJ1B1 or 7LK1B1, place the Cylinder (22) down over the
Rotor and against the Front End Plate with the end of the Cylinder
having the large bevel at the rear of the shoulder trailing.
For all others, place the Cylinder down over the Rotor and
against the Front End Plate with the end of the Cylinder having
the straight face at the rear of the shoulder trailing.
22. Place the Rear End Plate (18), at side rst, over the short hub of
the Rotor.
NOTICE
Make certain the End Plate Retainer (19) does not y as you slip
it on the hub of the Rotor.
23. Install the End Plate Retainer in the groove on the rotor hub.
24. Position the Rear End Plate Gasket (17) into the bottom of the
Motor Housing bore so the dowel hole and air inlet port in the
Gasket align with the dowel hole and air inlet in the housing bore
face.
25. Using an assembly dowel 3/32”in diameter by 10”
long (2.3 mm x 254 mm), align the dowel groove in the Front
End Plate, Cylinder, and Rear End Plate. 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 at the bottom of the housing bore, and slide the motor into
the Motor Housing until it seats.
26. Withdraw the assembly dowel and insert the Cylinder Dowel (24)
until the Cylinder Dowel is slightly below the surface of the Front
End Plate.
27. Place the two Bearing Spring Washers (26) inside the Front
Rotor Bearing Housing (27) and against the Front Rotor Bearing
Retainer.
28. Slide the Front Rotor Bearing Housing over the Front Rotor
Bearing.
Assembly of Gearing
1. Install the Grease Shield (41) into the front end of the Gear
Case (39) until it seats in the recess.
2. Slip the Spindle Bearing (42) into the Gear Case until it seats and
is ush against the Grease Shield.
3. Using snap ring pliers, install the Spindle Bearing Retainer (43) in
the groove in front of the Spindle Bearing.
4. If the Spindle Planet Gear Bearings (32) were removed, press
in new Spindle Planet Gear Bearings using a bearing inserting
tool (See Dwg. TPD786) that has a pilot and that contacts the
outer radius of the Bearing. Press against the stamped end of the
Bearing.
For J or M ratio, press the new Spindle Planet Gear Bearings into
the Spindle Planet Gear to a depth of 0.02” to 0.03”(0.50 mm
to 0.75 mm) from the face of the Spindle Planet Gear.
5. For H, J, K or L ratio, proceed as follows:
While supporting the inner race of the Spindle Bearing in
an arbor press, external threads of the Gear Case facing
downward, press the Spindle (30) into the Spindle Bearing
until the shoulder of the Spindle is seated against the Bearing.
Place a Spindle Planet Gear (31) on each gear shaft of the
Spindle.
Work 3 cc to 6 cc of the recommended grease into the gear
train.
6. For M or N ratio, proceed as follows:
While supporting the inner race of the Spindle Bearing in
an arbor press, external threads of the Gear Case facing
downward, press the Spindle into the Spindle Bearing until
the shoulder of the Spindle it seated against the Bearing.
Place a Spindle Planet Gear on each gear shaft of the Spindle.
If the Gear Head Planet Gear Bearings (37) were removed,
press in new Gear Head Planet Gear Bearings using a bearing
inserting tool (See Dwg. TPD786) that has a pilot and that
contacts the outer radius of the Bearing. Press against the
stamped end of the Bearing.
Install the Gear Head Spacer (38) into Gear Case ush against
the face of the Spindle Planet Gears.
Install the assembled Gear Head (35) into the Gear Case,
entering the spline of the Gear Head into mesh with the
Spindle Planet Gears.
7. Insert the Bearing Housing Spacer (29) into the Gear Case.
8. For H, J, M or N ratio, place the Rotor Pinion Spacer (34) and
Rotor Pinion (33) over the splined end of the Rotor.
NOTICE
The Gear Case has left-hand threads.
NOTICE
Run the motor at free speed while tightening the Gear Case.
Listen to make sure there is no scoring.
9. Thread the assembled Gear Case onto the Motor Housing and
tighten it to 40 ft-lb (54.1 Nm) torque.
Assembly of Angle Attachment
NOTICE
For 7L1A1, 7L1A3, 7L1A4, 7L1B1 and 7L1B4, the Bevel Pinion
(122) and the Bevel Gear/Spindle (122) are specially matched.
Replace these parts only as a matched set.
For 7L2A4 and 7L3A4, the Bevel Pinion (107) and Bevel Gear (107)
are specially matched. Replace these parts only as a matched set.
1. Lubricate the Bevel Pinion (107 or 122) as instructed on Page 2 and
insert it, gear end rst, into the long bore of the Angle Head (101).
2. Lubricate the Bevel Pinion Bearing (109) as instructed on Page
2 and insert it, unstamped end rst, into the bore of the Angle
Head, after the Bevel Pinion.
3. For 7L1A1 or 7L1A3 Angle Head, use No. 7L1A-950 Bearing
Inserting Tool and press the Bevel Pinion Bearing so the stamped
face is a maximum of 2.40” (61 mm) but not less than 2.38”(60.5
mm) below the end face of the Angle Head.
For 7L2A4 Angle Head, use No. 7L2A-950 Bearing Inserting
Tool and press the Bevel Pinion Bearing so the stamped face is a
maximum of 1.65” (42.0 mm) but not less than 1.64”(41.75 mm)
below the end face of the Angle Head.
For 7L3A4 Angle Head, use No. 7L3A-950 Bearing Inserting
Tool and press the Bevel Pinion Bearing so the stamped face is a
maximum of 1.35” (34.4 mm) but not less than 1.34”(34.1 mm)
below the end face of the Angle Head.
For 7L1B1 Angle Head, use the long Bearing Inserting Sleeve
included in the 7L1B1-955 Bearing Inserting Tool package and
press the Bevel Pinion Bearing so the stamped face is a maximum
a.
b.
c.
a.
b.
c.
d.
e.

6 16572638_ed2
of 2.12” (54 mm) but not less than 2.11”(53.5 mm) below the end
face of the Angle Head. See Dwg. TPD793.
Support Support
(Dwg. TPD793)
4. For 7L2A4 Angle Head, install the Bevel Pinion Bearing
Spacer (116). Using snap ring pliers, install the Pinion Bearing
Spacer Retainer (114).
For 7L3A4 Angle Head, install the Front Seal (118) and Rear
Seal (117) into their respective grooves on the Bevel Pinion Bearing
Spacer (116). Insert the Spacer Assembly over the splined end of the
Bevel Pinion and into the Angle Head until it is beyond the Spacer
Retainer groove. Using a thin blade screwdriver, start the end of the
Pinion Bearing Spacer Retainer (114) opposite the tab end into the
groove of the Angle Head. Rotate the screwdriver around the pinion
shaft to spiral the Retainer into the groove.
NOTICE
Check to make sure the Retainer is completely seated.
5. Lubricate the Bevel Pinion Thrust Bearing (112) as instructed on
Page 2. Install in order named the Front Thrust Bearing
Seat (113), Bevel Pinion Thrust Bearing (112) and Rear Thrust
Bearing Seat (111) over the splined end of the Bevel Pinion and
retain with the Bearing Seat Retainer (110).
6. If the Lower Spindle Bearing (119) has been removed, proceed as
follows:
For 7L2A4 Angle Head, using a sleeve that will contact only
the inner ring of the Bearing, press the Lower Spindle Bearing,
sealed side rst, onto the Spindle (122).
For 7L3A4 Angle Head, using a sleeve that will contact only
the inner ring of the Bearing, press on the stamped face of the
Bearing, red side toward the shoulder on the Spindle.
7. For 7L2A4 Angle Head, slide the Bevel Gear (107) onto the
Spindle.
For 7L3A4 Angle Head, press the Bevel Gear (107) onto the
Spindle.
8. For 7L2A4 Angle Head, apply a thread-locking compound to the
thread on the Bevel Gear Retainer Nut (120) and tighten it on the
Spindle to 10 ft-lb (13.5 Nm) torque.
For 7L3A4 Angle Head, spread the Bevel Gear Retainer (107)
and slip it over the end of the Spindle. Slide the Retainer down
the Spindle and into the groove of the Spindle to retain the Bevel
Gear.
9. If the Spindle Upper Bearing (104 or 105) was removed, install a
new Bearing as follows:
CAUTION
Do not get any Loctite in the bearing; damage to the bearing
could result.
For 7L1A1 or 7L1A3 Angle Head, apply a small drop of
a.
b.
a.
thread-locking compound to the small outside diameter of
the Upper Spindle Bearing Shaft.
Press the Spindle Upper Bearing (105) onto the
Spindle (122) and allow the thread-locking compound to dry
for a minimum of 10 minutes.
NOTICE
Make sure the Bevel Pinion (122) is pulled outward toward the
Bevel Pinion Bearing before inserting the Spindle into the Angle
Head.
c. Insert the Spindle into the Angle Head until the Upper Spindle
Bearing seats into the recess of the Angle Head.
d. Slip the Lower Spindle Bearing over the end of the Spindle
and into the Angle Head recess.
e. Install the Spindle Bearing Cap (121) nger-tight.
f. Spindle must turn freely.
g. With the Bevel Gear out of mesh with the Bevel Pinion,
measure the axial play of the Spindle (use + 0.25 lb. loads).
Subtract 0.002” (0.051 mm) from the reading for required shim
thickness. See Dwg. TPD682-1.
Beveled Pinion in disengaged Position
Shims
Axial Play Shim .001 MIN. to .003 MAX.
(Dwg. TPD682-1)
h. Unscrew and remove the Spindle Bearing Cap. While pulling
the Bevel Pinion outward toward the Bevel Pinion
Bearing (109). Remove the Spindle from the Angle Head.
NOTICE
The Shim Packet contains three 0.002” (0.05 mm) Shims and two
0.005” (0.13 mm) Shims.
i. Insert the required number of shims, as determined from
step (g), into the upper bearing recess of the Angle Head.
j. Reassemble and test the Angle Head as indicated in steps (c)
through (f).
k. For 7L2A4 Angle Head, press on the closed end of a
new Spindle Bearing entering the Bearing into the small
bore opposite the threaded end of the Angle Head to the
dimension shown. See Dwg. TPD680.
A
(Dwg. TPD680)
b.

16572638_ed2 7
Minimum Dimension Maximum Dimension
“A” “A”
in mm in mm
1.21 30.75 1.27 31.25
CAUTION
Press on the stamped face of the Bearing. Failure to do so will
cause damage to the Bearing. Install a new Angle Housing Cap
(103) into the top of the Angle Head.
l. For 7L3A4 Angle Head, press a new Spindle Bearing into the
Angle Head from the large threaded end to the dimension
shown. See Dwg. TPD636.
A
(Dwg. TPD636)
Minimum Dimension Maximum Dimension
“A” “A”
in mm in mm
0.718 18.25 0.728 18.50
m. For 7L1B1 Angle Head, install all the shims provided with
each Spindle Upper Bearing on the Spindle against the Bevel
Gear. See Dwg. TPD787.
Place Shims between Bevel Gear
and marked side of Bearing
(Dwg. TPD787)
CAUTION
Do not get any thread-locking compound in the bearing;
damage to the bearing could result.
n. Apply a small drop of thread-locking compound to the small
outside diameter at the upper end of the Spindle.
o. Press the Spindle Upper Bearing, stamped side against
the shims, onto the Spindle and allow the thread-locking
compound to dry for a minimum of 10 minutes.
CAUTION
Make sure the Bevel Pinion is pulled outward toward the Bevel
Pinion Bearing before inserting the Spindle into the Angle Head.
p. Lubricate the Spindle as previously instructed and insert the
Spindle into the Angle Head until the Spindle Upper Bearing
seats into the recess of the Angle Head.
q. Slip the Lower Spindle Bearing, stamped end out, over the end
of the Spindle and against the face of the Angle Head.
CAUTION
Do not attempt to press the Bearing into the housing with this
guide. It is only to be used for alignment.
r. Insert the smaller diameter of the Installation Sleeve Guide
(see Dwg. TPD794-1) into the Lower Spindle Bearing until it
stops against the face of the Spindle.
s. Slide the shouldered end of the long Bearing Inserting Sleeve
onto the Guide until the end of the Sleeve contacts the Lower
Spindle Bearing.
t. With the closed end of the Angle Head resting on a at
surface, press the Lower Spindle Bearing into the housing until
the shoulder of the Sleeve stops against the face of the Angle
Head or until the stamped face of the Bearing is a maximum
of 0.113” (2.88 mm) but not less than 0.108”(2.75 mm) below
the face of the Angle Head.
Bearing inserting Sleeve
Shoulder Strap
Correct Bearing Depth
Support
Installation Sleeve Guide
45 lower
Spindle Bearing
inserting Tools
(Dwg. TPD794-1)
* Registered trademark of ND Industries.
u. Using a thin blade screwdriver, start one end of the Lower
Spindle Bearing Retainer (119A) into the groove in the Angle
Head. Rotate the screwdriver around the Spindle to spiral the
Retainer into the groove.
10. Lubricate the Spindle Upper Bearing, Bevel Gear and Lower
Spindle Bearing as previously instructed and install the Spindle
into the Angle Head.
11. Clean the threads on the Angle Head and the Spindle Bearing
Cap (121), apply a lm of Vibra-Tite* VC3 to the threads.
12. For 7L1A1 or 7L1A3 Angle Head, tighten the Spindle Bearing
Cap to a minimum of 35 in-lb (3.9 Nm) torque.
For 7L2A4 Angle Head, install the Spindle Bearing Cap and
tighten the Cap to a minimum of 15 ft-lb (20.3 Nm) torque.
For 7L3A4 Angle Head, using No. 8SA32-26 Bearing Cap Wrench,
install the Spindle Bearing Cap and tighten the Cap to a minimum
of 25 ft-lb (34 Nm) torque.
13. Slide the Coupling Nut (124), threaded end trailing, over the
splined end of the Angle Head.
14. Apply the Coupling Nut Retainer (123) to the external groove on
the splined end of the Angle Head.
15. Engage the spline on the Bevel Pinion with the matching spline
in the Spindle (30) and thread the Coupling Nut onto the Gear
Case. Tighten the Coupling Nut to a minimum of 25 ft-lb (34 Nm)
torque. Check to make sure the Angle Head (101) aligns with the
Throttle Lever (3).
16. For 7L2A4 or 7L3A4 Angle Head, thread the Drill Chuck onto
the Spindle and tighten.
* Registered trademark of ND Industries.

8 16572638_ed2
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.
Gear Case gets hot Excessive grease Clean and inspect the Gear Case and gearing parts and lubricate as
instructed.
Worn or damaged parts Clean and inspect the Gear Case and gearing. Replace worn or broken
components.
Angle Head gets hot Excessive grease Clean and inspect the Angle Head and gearing. Lubricate as instructed.
Inadequate grease Inject 0.5 to 1.0 cc of grease into the Grease Fitting.
Worn or damaged parts Clean and inspect the Angle Head and Gearing. If the Bevel Gear and/or
Bevel Pinion is worn or broken, replace both parts as they are a matched set.
Related Documentation
For additional information refer to:
Product Safety Information Manual 04580353.
Product Information Manual 16572174.
Parts Information Manual 16572794.
Manuals can be downloaded from ingersollrandproducts.com

Notes:

Notes:

Notes:

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