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Aimco Brakes Nutrunner UOW Series Repair Manual

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    							- 8   -Disassembly and Reassembly of the Gear Section   (cont.)  
    UOW - 11 Gear Section  
    Part 
    Number   Description   Part 
    Number   Description  
    1  
    2  
    3  
    4  
    5  
    6   Gear Casing  
    Bearing  
    Spacer  
    First Gear Cage  
    Pl anet Gear  
    Spacer   7  
    8  
    9  
    10  
    11  
    12   Bearing  
    Second Gear Cage  
    Planet Gear  
    Needle Roller  
    Needle Roller  
    Spacer   
    						
    							- 9   -Disassembly and Reassembly of the Gear Section   (cont.)  
    UOW - T60 Gear Section  
    Disassembly  
    Note :    The UOW - T60 has gearings both before and after th e clutch.  
    1. Remove the hammer casing connector from the air motor casing.
    2. Remove the gear from the rotor.
    3. Remove the gear cage and planet gear from the internal gear.
    4. Remove the bearing from the internal gear.
    5. Clean all parts thoroughly
    Second  S et of  G earing  
    1. Remove the gear casing from the hammer casing nut.
    2. Remove the gear cage and planet gear from the internal gear.
    3. Remove the bearing from the gear casing.
    4. Clean all parts thoroughly.
    Inspection  
    1. Gears :    Inspect the teeth of the gear casing and p lanet gears for pitting and grooving.
    2. Needle Rollers :    Inspect the needle rollers for wear.
    3. Bearings :    Inspect the bearing for side play and knocking.
    4. Replace all worn parts.
    Assembly  
    Note :    Assembly is the same on both gear assemblies.  
    1. Install the b earing into the gear cage.
    2. Install the gear cage into the gear casing.
    3. Install the needle roller and planet gears into the gear casing.  Put a small amount of grease by each planet
    gear and on the gear cage.
    4. On the first gear assembly, install the rotor   gear onto the rotor.  On the second gear assembly, install the
    second middle gear and gear cage spacer onto the cam guide.
    5. Install the gear casing assembly onto the tool and test. 
    						
    							- 10   -Disassembly and Reassembly of the Gear Section   (cont.)  
    UOW - T60 Gear S ection  
    Part 
    Number   Description   Part 
    Number   Description  
    1  
    2  
    3  
    4  
    5  
    6   Gear Casing  
    Bearing  
    Needle Roller  
    Planet Gear  
    Spacer  
    Second Internal Gear   7  
    8  
    9  
    10  
    11   Hammer Casing Nut  
    Hammer Casing Connector  
    First Internal Gear  
    First Gear Cage  
    Second Gea r Cage   
    						
    							- 11   -Disassembly and Reassembly of  Bevel Gear Casing Assembly  
    Pinion and Bevel Gear Section  
    Disassembly  
    1. Remove the bevel gear casing from the gear casing.
    2. Remove the clamp ring (left - hand thread) and slide the pinion gear and bearing out of the ho using.
    3. Remove the four flush head screws from the bevel gear casing cover and remove the cover.
    4. Remove the driven gear spindle assembly from the housing.
    5. Press the bearing and bevel gear off of the driven gear spindle.
    6. Clean parts thoroughly.
    Inspecti on  
    1. Gears :    Inspect gears for pitting and grooving.
    2. Bearings :    Inspect bearings for side play and knocking.
    3. Replace all worn parts.
    Assembly  
    1. Press the bearing and spacer onto the driven gear spindle.  Align the bevel gear up with the key and press
    onto   the driven gear spindle.  Install the bevel gear casing cover.   Note :    These screws should be torqued to
    30 in. lbs. and use a good quality thread locker on the screws.
    2. Install the pinion gear, shim, and bearing.   Note :    Adjust shims as required.  Gea ring should turn smooth
    with slight play between gears.
    3. Install and tighten the clamp ring. 
    						
    							- 12   -Disassembly and Reassembly of  Bevel Gear Casing Assembly   (cont.)
    Socket and Gearing Section  
    Disassembly  
    1. Remove the flush head screws holding down the cove r plate.
    2. Remove the cover plate.
    3. Remove the gears, socket, and needle roller.
    4. Remove the spring, checker, and notch pin.
    5. Clean parts thoroughly.
    Inspection  
    1. Gears :    Inspect gears for pitting and grooving.
    2. Needle Bearings :    Inspect the needle bearings   in gears for loose and/or missing needles.
    3. Needle Rollers :    Inspect the needle rollers for wear.
    4. Inspect needle roller alignment holes in the bevel gear casing and gear casing cover for wear and out of
    roundness.
    5. Checker :    Inspect the checker and check er spring for wear.
    6. Replace all worn parts.
    Assembly  
    1. Install the needle roller and notch pin into the bevel gear casing.
    2. Install the checker and gearing.
    3. Install the checker spring and rotate gearing in reverse by hand until it is stopped by the check er.
    4. Align the socket opening with the casing.
    5. Replace the gear casing cover and screws.   Note :    Torque the screws to 30 in. lbs. of torque and use a good
    quality thread locker on the screws.
    6. Run and test the tool. 
    						
    							- 13   -Disassembly and Reassembly of  Bev el Gear Casing Assembly   (cont.)
    UOW Bevel Gear Casing  
    Part 
    Number   Description   Part 
    Number   Description  
    1  
    2  
    3  
    4  
    5  
    6  
    7  
    8  
    9  
    10  
    11  
    12  
    13  
    14  
    15  
    16  
    17   Bearing  
    Driven Gear  
    Key  
    Flush Head Screw  
    Spur Gear  
    Ratchet Gear  
    Needle Roller Bearing  
    Needle Rolle r  
    Socket  
    Spur Gear  
    Gear Casing Cover  
    Flush Head Screw  
    Needle Roller  
    Needle Roller  
    Needle Roller  
    Needle Roller Bearing  
    Needle Roller   18  
    19  
    20  
    21  
    22  
    23  
    24  
    25  
    26  
    27  
    28  
    29  
    30  
    31  
    32  
    33   Checker Spring  
    Checker  
    Middle Gear  
    Grease Cup  
    Spacer  
    Outer Snap Ring  
    Ball  Bearing Support  
    Bearing  
    Driving Gear  
    Bevel Gear Casing  
    Needle Roller Bearing  
    Cam Spacer  
    Driven Gear Spindle  
    Adjusting Spacer  
    Bevel Gear Casing Cover  
    Flush Head Screw   
    						
    							- 14   -Troubleshooting  
    UOW - T60  
    TROUBLE   CAUSE   SOLUTION  
    Tool operates intermittently   One or   more of the shoulders 
    on the pilot pin is rounded   Replace pilot pin  
    Tool shuts off as soon as it is 
    started, or tool shuts off but 
    will not restart   Spring un der pilot pin has lost 
    tension;  notch pin is rounded.    Replace notch pin, band and/or 
    pilot pin.  Replace spring  
    Band spring is stretched out of 
    shape.  
    The shoulders on pilot pin are 
    rounded  
    Loss of RPM   Exhaust filter is dirty causing 
    back pressure   Replace filter  
    Tool runs all the time   Value rod is stuck down   Disassemble clean and 
    reassemble  
    A ir motor runs but socket does 
    not work   Broken gear in front head   Disassemble front head; 
    inspect and replace broken 
    parts  
    Low torque   W orn cam or worn air motor   Replace cam or rebuild air 
    motor  
    Socket does not stop in reverse   Broken checker spring   Replace   checker spring  
    UOW - 11  
    TROUBLE   CAUSE   SOLUTION  
    Loss of RPMs   Exhaust filter is dirty causing 
    back pressure   Replace filter  
    Tool runs all the time   Value rod is  stock d own   Disassemble ,   clean ,   and 
    reassemble  
    Air motor runs but socket does 
    not turn   Broken  gear in front head   Disassemble front head ; 
    inspect and replace broken 
    parts  
    Low torque   W orn air motor   Rebuild air motor  
    Socket does not stop in reverse   Broken checker spring   Replace checker spring  
    Recommended Preventative Maintenance :  
    Clean and inspe ct the tool every six months or 250,000 cycles.   
    						
    							
    Notes:  
    						
    							Corporate Headquarters  
    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 - 9 015 011 - 52 - 81 - 1001 - 1600
    www.aimco - global.com FAX 011 - 52 - 81 - 1001 - 1630
    LIT - MAN470  
    Rev. 
    03/2016  Printed in USA  
    ©2016 AIMCO  
    						
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