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Aimco Brakes Nutrunner UAN Series Repair Manual

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    							- 8   -Disassembly and Reassembly of the Angle  Head Section
    Disassembly  
    1. On the UAN - 611R and 701R, loosen the locking nut (right hand) and remove the angle head casing on the
    UAN - 830 and 950.  Remove the angle head casing (left hand).
    2. Remove the angle head casing cover on the UAN - 611R and 701R.  Us e Jig #268 - 488 - 6 - 5 to remove the
    angle head casing cover.
    3. Remove the driving gear, bearing, adjusting spacers, and O - rings from the angle head.
    4. Remove the driving gear spindle or gear cage bearing collar, bearings, spacers, bushings, and driving gear.
    O n the UAN - 611R and 701R, use Jig #517 - 06504 - 5 to remove the driving gear spindle.
    Inspection  
    1. Inspect the driver and driving gear for pitting and grooving.
    2. Inspect all bearings for side play and knocking.
    3. Replace all worn parts.
    Reassembly  
    1. Install the   driving gear, bushings, spacers, and driving gear spindle or gear cage bearing collar.   Note :    The
    adjustment spacers are for adjusting the gear lash.
    2. Install driving gear, spacers, O - ring, and angle head casing cover.   Note :    The adjustment spacers are  used
    to adjust the gear lash.
    3. Install the angle head casing onto tool.  On the UAN - 830 and 950, use a small amount of a service
    removable thread locker. 
    						
    							- 9   -Disassembly and Reassembly of the Angle Head Section  (cont.)
    UAN - 611R & 701R   UAN - 830 & 950  
    Part  
    Number   Description   Part  
    Number   Description  
    1  
    2  
    3  
    4  
    5  
    6  
    7  
    8  
    9  
    10  
    11   Angle Casing Cover  
    Adjusting Spacer  
    O - Ring
    Bearing
    Retainer Pin
    Anvil
    Driving Gear
    Roller Pin
    Needle Roller Bearing
    Grease Cup
    Angle Casing 12  
    13  
    14  
    15  
    16  
    17  
    18  
    19  
    20  
    21   Locking Nut  
    Snap Ring  
    Driving Gear  
    Needle Roller Bearing  
    Bushing  
    Spacer  
    Adjustment Spacer  
    Bearing  
    Driving Gear Spindle Retainer Screw  
    Gear Cage Bearing Collar  7   
    						
    							- 10   -Disassembly and Reassembly of the Air Motor
    Disassembly  
    1. On th e UAN - 611R and 701R, separate the air motor casing and the gear casing.  On the UAN 830 and 950,
    separate the handle casing from the air motor casing by loosening the valve body nut (right hand).
    2. On the UAN 611R and 701R, pull the air motor out of the cas ing.  On the UAN - 830 and 950, the air motor
    slides out the back of the casing.
    3. Pull the front plate off and remove the bearing.
    4. Remove the blades from the rotor.
    5. Press the rotor out of the rear plate bearing and remove the bearing from the rear plate.
    Inspection  
    1. Inspect bearings for knocking and side play.
    2. Inspect cylinder for waviness.
    3. Inspect plate for grooving.
    4. Inspect blades for splitting and grooving on the sides and ends.
    5. Inspect the exhaust filter for dirt.
    6. Replace all worn parts.
    Reassemb ly  
    1. Press the greased bearing into the rear plate and over the rotor.   Note :    There should be a small amount of
    drag between the rotor and the rear plate but no light.
    2. Lightly oil the blades and install into the rotor with the flat side out.
    3. Slide the cy linder down over the rotor, lining up the roll pin with the hole in the rear plate.
    4. Grease the bearing and press it into the front plate.  Install the front plate onto the rotor with the bearing side
    up.   Note :    The cylinder should be tight between the pl ate, but the rotor should turn freely.
    5. Slide the air motor into the casing.  On the UAN - 611R and 701R, line up the pin on the side of the front
    plate with the notch in the casing.
    6. Install the gear casing or handle back on to the air motor casing. 
    						
    							- 11   -Disas sembly and Reassembly of the Air Motor  (cont.)
    UAN - 611R & 701R   UAN - 830 & 950  
    Part  
    Number   Description   Part  
    Number   Description  
    1  
    2  
    3  
    4  
    5   Bearing  
    Pin  
    Front Plate  
    Rotor  
    Blade   6  
    7  
    8  
    9   Cylinder  
    Rear Plate  
    Bearing  
    Roll Pin   
    						
    							- 12   -Troubleshooting
    PROBLEM   CAUSE   SOLUTION  
    Loses torque every time the 
    fastener is run down.  Finally 
    the tool will not run.   The Lock Pin did not get put back 
    into the Spring Retainer.   Put the Lock Pin in the 
    Spring Retainer.  
    Tool operates intermitt ently.   One or more of the shoulders on 
    the Pilot Pin is rounded.   Replace the Pilot Pin.  
    Tool shuts off as soon as it is 
    started or shuts off but will not 
    re - start.   Spring under Pilot Pin has lost 
    tension.  
    Replace the Notch Pin, 
    Band, and/or Pilot Pin.  
    Replace Spring.  Notch Pin is rounded.  
    Notch Pin Band is stretched out of 
    shape.  
    The shoulders on the Pilot Pin are 
    rounded.  
    Tool ratchets when it shuts off.   Valve Rod is too long. Shorten Valve Rod.  
    Bur on Pilot Pin or inside of Cam.   Clean bur off of Pilot Pin or 
    Cam.
    Loss of RPMs   Exhaust Filter is dirty causing back 
    pressure.   Filter  
    Lever type only.  Tool will not 
    run.   The Valve Rod is pushed through 
    the Shut - off Valve.   Replace Shut - off Valve.  
    Tool runs all the time.   O - ring has gotten pushed down
    into the Casing. Put the O - ring back into its 
    seat.  
    Air pressure is too high.  
    Tool will not reset.   Shut - off Valve damaged. Replace Shut - off Valve.  
    Valve Spindle installed upside 
    down.   Reinstall Valve Spindle 
    righ t - side up.  
    Tool will not reset.   Shut - off Valve damaged. Replace Shut - off Valve.  
    Valve Spindle installed upside 
    down.   Reinstall Valve Spindle 
    right - side up.
    Tool will not reset after it shuts 
    off.   Pilot Pin and Cam not lined up 
    right. Alig n the lobes on the Cam 
    and Pilot Pin.  
    Recommended Preventative Maintenance  
    It is recommended that the whole tool be cleaned and inspected every 250,000 cycles or six months, whichever 
    occurs first.   
    						
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    1204 E Maple Road   10000 SE Pine Street   Ave. Morones Prieto 2110 Pte.  
    Troy, MI  48083   Portland, OR  97216   Col. Loma Larga  
    248 - 583 - 1180 800 - 852 - 1368 Monterrey ,   NL CP   64710, Mexico  
    FAX 248 - 583 - 7115 FAX 800 - 582 - 9015 011 - 52 - 81 - 1001 - 1600
    www.aimco - global.com FAX 011 - 52 - 81 - 1001 - 1630
    LIT - MAN440  
    Rev. 
    03/2016  Printed in USA  
    ©2016 AIMCO  
    						
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