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.
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