16606105
Edition 2
May 2014
Air Drill
551 Series
Maintenance Information
Save These Instructions
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 off 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).
Lubrication
Before attaching the air hose, squirt several drops of
Ingersoll Rand No. 50 Oil into the air inlet. WARNING
Before starting the Motor and after each four hours of operation, Notice the arrows on Throttle Sleeve (109). These arrows indicate
unless an Air Line Lubricator is used, unscrew the Oil Chamber the direction in which the Throttle Sleeve must be turned to
Plug (20) and fill the chamber in the Backhead (19) with activate either FORWARD or REVERSE rotation of the Drill.
Ingersoll Rand No. 50 Oil. Hold the Drill in the normal operating position with the Throttle
Always use an air line lubricator with this tool. Sleeve pointing to operator’s right and with the Throttle Sleeve
in his right hand. Pivot the Reverse Stop Lever (92) away from
We recommend Ingersoll Rand No. 16LUB16C Portable Air Line the operator. With the Reverse Stop Lever in this position,
Lubricator. Its use eliminates the need for filling the oil chamber the Drill can be operated in either the FORWARD rotation or
in the Backhead. Because of the high capacity of the Portable Air REVERSE rotation. Therefore, inadvertent movement of the
Line Lubricator, it requires little attention, and thereby reduces the Throttle Sleeve could cause a sudden change in the direction of
possibility of neglect. Although the Portable Air Line Lubricator rotation of the Drill.
automatically oils the Throttle Valve (110), Governor Valve (12), Pivoting the Reverse Stop Lever toward the operator prevents
Reverse Valve (88), and the Vanes (40) in the motor, it does not the REVERSE rotation of the Drill and permits the Drill to be
eliminate the necessity of periodically adding grease to the gear operated in the FORWARD rotation only.
chamber and governor chamber. Weekly, or as experience
indicates, insert a small quantity of the recommended grease into
the Grease Fittings (25 and 56). Two or three strokes of a small grease
gun are sufficient for the Fitting (25) in the Backhead (19); six or eight
strokes for the Fitting (56) in the Gear Case (55 or 251).
Hose and Hose Fittings
Use 1” (25 mm) hose for connecting the Tool to the air supply. Unless For Tools equipped with remote control, use the No. R5H-46 Male
the Tool is equipped for remote control, use the No. P35-46 Male Hose Nipple (1” hose to 3/4” male pipe) for attaching the hoses to
Hose Nipple (1” hose to 1” male pipe) for attaching the hose to the the Inlet Studs.
throttle.
Disassembly
General Instructions Feed Screw Cap
1. Do not disassemble the tool any further than necessary to replace NOTICE
or repair damaged parts.
2. Whenever grasping a tool or part in a vise, always use The external thread on the Outer Feed Screw (76), Motor
leather-covered or copper-covered vise jaws to protect the Housing Stud (262) or Backhead Clamp Stud (262) is left–hand;
surface of the part and help prevent distortion. This is particularly rotate the Feed Screw Cap (82), Motor Mounting Stud Cap (268)
true of threaded members and housings. or Clamp Stud Cap (268) clockwise to remove.
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 Disassembly of the Motor
replacement. 1. Remove the Backhead Cap Screws (84).
4. Do not disassemble the Tool unless you have a complete set of
new gaskets and O-rings for replacement. NOTICE
Air Strainer Do not pry the Backhead (19) from the Motor Housing (1 or 254).
Periodically, as experience indicates, unscrew the Air Strainer 2. Grasp the Oil Chamber Plug (20) in a leather-covered or
Body (119) from the Air Strainer Cap (116) and wash the Air Strainer copper-covered vise and pull on the Housing if the Backhead
Screen (117) in a clean, suitable cleaning solution. Enter the prongs cannot be lifted off with the fingers.
on the Screen Support (118) into one end of the Screen and insert
the Screen, support end first, into the Body when assembling the NOTICE
Strainer. The Rotor (34) is tapped left–hand: rotate the Governor
Assembly clockwise to remove.
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Disassembly of the Throttle
NOTICE 1. Remove the Throttle Body Setscrew (95) from the Motor Housing
before withdrawing the Throttle Body (100).
Never clamp the Cylinder (39) in a vise.
Disassembly of the Gearing
3. Grasp the Cylinder in one hand. Insert a small rod into the rotor 1. Unscrew the three Planet Gear Frame Setscrews (48) from the
bore and drive the hub of the Rotor (34) out of the Rear Rotor Planet Gear Frame (47) before attempting to press the
Bearing (37). Support the Front End Plate (41) and press the front Spindle (44 or 250) out of the Planet Gear Frame.
hub of the Rotor out of the Front Rotor Bearing (42).
Assembly
General Instructions
1. Always press on the inner ring of a ball–type bearing when Assembly of the Throttle
installing the bearing on a shaft.
1. Install the Throttle Sector (97) onto the Throttle Body, and press
2. Always press on the outer ring of a ball–type bearing when
the Body into the Motor Housing until the Throttle Body Setscrew
pressing the bearing into a bearing recess.
holes are aligned.
3. Whenever grasping a tool or part in a vise, always use
2. Align the tooth of the Throttle Sector marked with an arrow with
leather-covered or copper-covered vise jaws. Take extra care with
the tooth space of the Reverse Valve Sector (89) marked “X” and
threaded parts and housings.
mesh the two Sectors.
4. Always clean every part and wipe every part with a thin film of oil
before installation. Assembly of the Gearing
5. Apply a film of O-ring lubricant to all O-rings before final 1. Tighten the Screws after assembling the Gear Frame on the
assembly. Spindle.
6. Check every bearing for roughness. If an open bearing must be 2. Note the stamping “THRUST HERE” on one side of the Spindle
cleaned, wash it thoroughly in a clean, suitable, cleaning solution Thrust Bearing (69). Install the Bearing, stamped side first, in the
and dry with a clean cloth. Sealed or shielded bearing should bearing recess in the Motor Housing (1 or 254).
never be cleaned. Work grease thoroughly into every open 3. Install an Intermediate Gear Bearing (75) at each end of the
bearing before installation. Intermediate Gear (74). Mesh the large gear on the compound
Intermediate Gear with the Rotor Pinion (35) and install the
Assembly of the Motor Bearing in this end of the Intermediate Gear Bearing Stud (3) in
1. Press the Rear Rotor Bearing (37), shielded side first, into the the Motor Housing (1 or 254).
recess in the Rear End Plate (38), with an arbor that will contact 4. Apply the Gear Case (55) to the Motor Housing.
only the outer ring of the Bearing. 5. Coat one face of the Spindle Thrust Bearing Spacer (70) with
grease and center it on the Spindle Thrust Bearing (69) in the
NOTICE Motor Housing. The grease will hold it in position on the Bearing
during assembly.
Press on the inner ring of the Bearing when installing this
6. Place the Spindle Gear (73), large end first, in the Gear Case,
assembly on the rear hub of the Rotor (34).
meshing the large gear with the small gear of the compound
2. Press the Front Rotor Bearing (42), shielded side first, onto the Intermediate Gear, and centering it on the Bearing Spacer.
front hub of the Rotor (34) with a sleeve that will clear the Rotor 7. Coat the spiral–grooved portion of the Spindle (44 or 250) with
Pinion (35) and contact only the inner ring of the Bearing. grease and insert it through the Spindle Gear, Spindle Bearing
3. Install the End Plate (38 or 41) on the Rotor (34), and insert a Spacer and into the Spindle Thrust Bearing, meshing the Planet
Vane (40) into each vane slot in the Rotor. Gear (49) contained in the Planet Gear Frame (47) on the Spindle
4. Place the Cylinder (39) over the Rotor and against the installed with the small gear on the compound Spindle Gear.
End Plate. 8. Mesh the Internal Gear (72) contained in the Gear Case Cover (59
or 253) with the Planet Gears and apply the Gear Case Cover to
NOTICE the Gear Case.
Make certain the Cylinder is installed properly before
proceeding. Check as follows:
There is a 3/4” (19 mm) dia. hole in each of the two cylinder
flats. One hole is located about midway between the ends of
the Cylinder, and the other is located relatively close to one end.
When the Cylinder is properly installed, the hole nearer the end is
farthest from the Rotor Pinion (35).
5. When installing the motor assembly, align the dowel holes
through both End Plates (38 and 41) with the dowel hole through
the Cylinder (39) and insert a 3/16” (5 mm) dia. rod at least 10” (254
mm) long through the aligned holes, allowing it to protrude from
the pinion end of the motor assembly. Enter the protruding end
of the rod into the dowel hole in the bottom of the motor housing
bore, and slide the motor assembly squarely into the Housing.6.
Draw the Backhead (19) evenly against the Backhead Gasket
(18) on the face of the Motor Housing (1 or 254) by turning each
Backhead Cap Screw (84) a little at a time until all are tight.
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Governor Adjustment
NOTICE A
The Governor has a left–hand thread. Turn clockwise to remove
from Rotor and counterclockwise to install in Rotor.
When installing a new Governor, screw the governor adjusting nut
onto the governor stem until dimension “A” equals 1–7/8” (48 mm).
This will usually result in the proper governed free speed. However,
this is only an approximate setting. Further adjustment may be
necessary. Screw the Nut further onto the Stem to increase the
speed; back it off to decrease the speed. The correct governed A = 1–7/8” (48 mm)
free speed of the various sizes at the Spindle is:
(Dwg. TPD497)
Before starting a reassembled tool, refer to the Lubrication Section.
RPM at 90 psig
Model
(6.2 bar/620 kPa)
551SM, 551SM51 120
551S0, 551S051 77
Maintenance Tools
Tool Name Operation Tool Number for Ordering
Spindle Packing Nut Spanner Wrench Removing or installing the Spindle PackingNut (60) on the Gear Case
R4–122
Cover (59) of Models 551SM, 551SM51, 551S0 and 551S051.
Grease Gun Lubrication P25–228
Troubleshooting Guide
Trouble Probable Cause Solution
Loss of power or low free speed Dirty Inlet Bushing or Air Strainer Screen Using a clean, suitable, cleaning solution in a
well–ventilated area, clean the Air Strainer Screen. Allow
to air dry.
Worn or broken Vanes Replace the complete set of Vanes.
Worn or broken Cylinder and/or scored End Plates Examine Cylinder and replace it if it is worn or broken or
if bore is scored or wavy. Replace End Plates if they are
Low power scored.
Dirty motor parts Disassemble the tool and clean all parts with a clean,
suitable, cleaning solution, in a well–ventilated area.
Reassemble the tool as instructed in this manual.
Motor will not run Incorrect assembly of motor Disassemble motor, replace worn or broken parts and
reassemble as instructed.
Rough Operation Worn or broken Rear Rotor Bearing or Front Rotor Examine each bearing. Replace if worn or damaged.
Bearing
Worn or broken Gear teeth Check for a worn or broken gearing or if a replacement
is necessary.
Air leaks Worn Throttle Valve Face or Throttle Valve Face Cap Replace worn parts.
Oil Chamber Plug worn or not tight Tighten the Plug. If the problem persists, replace the
Plug.
Related Documentation
For additional information refer to:
Product Safety Information Manual 04581450.
Product Information Manual 03524410.
Parts Information Manual 16606097.
Manuals can be downloaded from ingersollrandproducts.com
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Notes:
Notes:
Notes:
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