Ingersoll-Rand 551 Series Setup guide

16606105
Edition 1
August 2010
Save These Instructions
Air Drill
551 Series
Maintenance Information

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WARNING
Always wear eye protection when operating or performing maintenance on this tool.
Always turn o 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.
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.
Before starting the Motor and after each four hours of operation,
unless an Air Line Lubricator is used, unscrew the Oil Chamber
Plug (20) and ll the chamber in the Backhead (19) with
Ingersoll Rand No. 50 Oil.
Always use an air line lubricator with this tool.
We recommend Ingersoll Rand No. 16LUB16C Portable Air Line
Lubricator. Its use eliminates the need for lling the oil chamber
in the Backhead. Because of the high capacity of the Portable Air
Line Lubricator, it requires little attention, and thereby reduces the
possibility of neglect. Although the Portable Air Line Lubricator
automatically oils the Throttle Valve (110), Governor Valve (12),
Reverse Valve (88), and the Vanes (40) in the motor, it does not
eliminate the necessity of periodically adding grease to the gear
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 sucient for the Fitting (25) in the Backhead (19); six or eight
strokes for the Fitting (56) in the Gear Case (55 or 251).
WARNING
Notice the arrows on Throttle Sleeve (109).These arrows indicate
the direction in which the Throttle Sleeve must be turned to
activate either FORWARD or REVERSE rotation of the Drill.
Hold the Drill in the normal operating position with theThrottle
Sleeve pointing to operator’s right and with theThrottle Sleeve
in his right hand. Pivot the Reverse Stop Lever (92) away from
the operator.With the Reverse Stop Lever in this position,
the Drill can be operated in either the FORWARD rotation or
REVERSE rotation.Therefore, inadvertent movement of the
Throttle Sleeve could cause a sudden change in the direction of
rotation of the Drill.
Pivoting the Reverse Stop Lever toward the operator prevents
the REVERSE rotation of the Drill and permits the Drill to be
operated in the FORWARD rotation only.
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.
Air Strainer
Periodically, as experience indicates, unscrew the Air Strainer
Body (119) from the Air Strainer Cap (116) and wash the Air Strainer
Screen (117) in a clean, suitable cleaning solution. Enter the prongs
on the Screen Support (118) into one end of the Screen and insert
the Screen, support end rst, into the Body when assembling the
Strainer.
Feed Screw Cap
NOTICE
The external thread on the Outer Feed Screw (76), Motor
Housing Stud (262) or Backhead Clamp Stud (262) is left–hand;
rotate the Feed Screw Cap (82), Motor Mounting Stud Cap (268)
or Clamp Stud Cap (268) clockwise to remove.
1.
2.
3.
4.
Disassembly of the Motor
1. Remove the Backhead Cap Screws (84).
NOTICE
Do not pry the Backhead (19) from the Motor Housing (1 or 254).
2. Grasp the Oil Chamber Plug (20) in a leather-covered or
copper-covered vise and pull on the Housing if the Backhead
cannot be lifted o with the ngers.
NOTICE
The Rotor (34) is tapped left–hand: rotate the Governor
Assembly clockwise to remove.
NOTICE
Never clamp the Cylinder (39) in a vise.
3. Grasp the Cylinder in one hand. Insert a small rod into the rotor
bore and drive the hub of the Rotor (34) out of the Rear Rotor
Bearing (37). Support the Front End Plate (41) and press the front
hub of the Rotor out of the Front Rotor Bearing (42).
Disassembly of the Throttle
1. Remove the Throttle Body Setscrew (95) from the Motor Housing
before withdrawing theThrottle Body (100).
Disassembly of the Gearing
1. Unscrew the three Planet Gear Frame Setscrews (48) from the
Planet Gear Frame (47) before attempting to press the
Spindle (44 or 250) out of the Planet Gear Frame.
Hose and Hose Fittings
Use 1”(25 mm) hose for connecting the Tool to the air supply. Unless
the Tool is equipped for remote control, use the No. P35-46 Male
Hose Nipple (1”hose to 1”male pipe) for attaching the hose to the
throttle.
ForTools equipped with remote control, use the No. R5H-46 Male
Hose Nipple (1”hose to 3/4”male pipe) for attaching the hoses to
the Inlet Studs.

16606105_ed1 3
Assembly
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. Apply a lm of O-ring lubricant to all O-rings before nal
assembly.
6. 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.
Assembly of the Motor
1. Press the Rear Rotor Bearing (37), shielded side rst, into the
recess in the Rear End Plate (38), with an arbor that will contact
only the outer ring of the Bearing.
NOTICE
Press on the inner ring of the Bearing when installing this
assembly on the rear hub of the Rotor (34).
2. Press the Front Rotor Bearing (42), shielded side rst, onto the
front hub of the Rotor (34) with a sleeve that will clear the Rotor
Pinion (35) and contact only the inner ring of the Bearing.
3. Install the End Plate (38 or 41) on the Rotor (34), and insert a
Vane (40) into each vane slot in the Rotor.
4. Place the Cylinder (39) over the Rotor and against the installed
End Plate.
NOTICE
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
ats. 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.
Assembly of the Throttle
1. Install the Throttle Sector (97) onto the Throttle Body, and press
the Body into the Motor Housing until the Throttle Body Setscrew
holes are aligned.
2. Align the tooth of the Throttle Sector marked with an arrow with
the tooth space of the Reverse Valve Sector (89) marked“X”and
mesh the two Sectors.
Assembly of the Gearing
1. Tighten the Screws after assembling the Gear Frame on the
Spindle.
2. Note the stamping“THRUST HERE”on one side of the Spindle
Thrust Bearing (69). Install the Bearing, stamped side rst, in the
bearing recess in the Motor Housing (1 or 254).
3. Install an Intermediate Gear Bearing (75) at each end of the
Intermediate Gear (74). Mesh the large gear on the compound
Intermediate Gear with the Rotor Pinion (35) and install the
Bearing in this end of the Intermediate Gear Bearing Stud (3) in
the Motor Housing (1 or 254).
4. Apply the Gear Case (55) to the Motor Housing.
5. Coat one face of the Spindle Thrust Bearing Spacer (70) with
grease and center it on the SpindleThrust Bearing (69) in the
Motor Housing. The grease will hold it in position on the Bearing
during assembly.
6. Place the Spindle Gear (73), large end rst, in the Gear Case,
meshing the large gear with the small gear of the compound
Intermediate Gear, and centering it on the Bearing Spacer.
7. Coat the spiral–grooved portion of the Spindle (44 or 250) with
grease and insert it through the Spindle Gear, Spindle Bearing
Spacer and into the Spindle Thrust Bearing, meshing the Planet
Gear (49) contained in the Planet Gear Frame (47) on the Spindle
with the small gear on the compound Spindle Gear.
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
the Gear Case.
Governor Adjustment
NOTICE
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 o to decrease the speed.The correct governed
free speed of the various sizes at the Spindle is:
A = 1–7/8”(48 mm)
A
(Dwg. TPD497)
Model RPM at 90 psig
(6.2 bar/620 kPa)
551SM, 551SM51 120
551S0, 551S051 77
Before starting a reassembled tool, refer to the Lubrication Section.

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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
Cover (59) of Models 551SM, 551SM51, 551S0 and 551S051. R4–122
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
Bearing Examine each bearing. Replace if worn or damaged.
Worn or broken Gear teeth Check for a worn or broken gearing or if a replacement
is necessary.
Air leaks WornThrottle 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 www.ingersollrandproducts.com

Notes:

Notes:

Notes:

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