Aimco Brakes Nutrunner URW Series Repair Manual
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PO Box 16460, Portland, OR 97292-0460 503-2 54-6600 Fax 503-2 55-2615 URW Series URW - 6, 8, 9, 10 & 12 Series Repair Manual www.aimco-global.com
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Contents Page Number 1. Tools Needed for Repair 1 2. Disassembly and Reassembly of the Cam Casing 2-4 3. Disassembly and Reassembly of the Gear Section 5-9 4. Disassembly and Reassembly of the Air Motor Section 10-14 5. Recommended Maintenance 15
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- 1 -Tools Needed for Repair 1. One Set of T - H andle Metric Allen Wrenches 2. Flat - Bladed Screwdrivers 3. Brass Hammer 4. Dead Blow Hammer 5. 10 oz. Ball Pee n Hammer 6. One Set of Pin Punches 7. One Set of O - Ring Picks 8. 6” Adj ustable End Wrench 9. 12” Adjustable End Wrench 10. Medium Pair Channel Locks or Adjustable Jaw Pliers 11. Medium Honing Stone 12. 220 Grit Wet/Dry Sandp aper 13. Lap Plate 14. Loc - Tite #242 15. CFC Free Degreaser - Cleanser 16. Loc - Tite Accelerator 17....
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- 2 -Disassembly and Reassembly of the Cam Casing Disassembly 1. Remove the Rod Guide Bolts and Rod Guide Nuts. 2. Remove the Rod Guides, Ratchet, Checker, Springs , and Rod Plate Spring. 3. Rem ove the Cam Casing from the tool (left - hand thread). On the URW - 6 , you must loosen the Gear Ca sing Lock Nut first and then remove the Connector, Cam, Bearing, Spacer, Thrust Washers , and T hrust Bearing. On the URW - 8N & 9N , over - tightening the Ha ndle Nut will keep the Casing...
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- 3 -Disassembly and Reassembly of the Cam Casing (cont.) Adjusting the Cam Casing Assembly For all T ools E xcept the URW - 6 : 1. While running the tool, reinstall the Cam Ca sing to the Gear Casing. 2. Watch the Ratc het as the Cam Casing turns down onto the Gear Casing. When the Ratchet starts to turn , mark its position and conti nue to allow the Cam Casing to turn down onto the Gear Casing until the R atchet stops or the Cam Casing bottoms out. 3. T urn the Cam Casing back half...
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- 4 -Disassembly and Reassembly of the Cam Casing (cont.) URW - Cam Casing Part Number Description Part Number Description 1 2 3 4 5 6 7 8 9 10 Checker Ratchet Snap Ring Spring Rod Guide Left Round Head Scre w Rod Plate Spring Spring Washer Cam Roller Pin Operating Rod 11 12 13 14 15 16 17 18 19 Cam Roller Spacer (URW - 8N only) Rod Guide Nut Spring Cam Roller Push Pin Cam Casing Grease Cup Rod Guide Right Rod...
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- 5 -Disassembly and Reassembly of the Ge ar Casing Disassembly 1. Remove the Cam Casing (left - hand thread). 2. On the URW - 6 Only : a. Remove the Connector from the Cam Casing. Remove the Cam, Bearing, Spacer, Thrust Washers , and Thrust Bearing. b. Remove the Gear Casing, Gear Cage, Roller Pins, P lan et Gears, Needle Roller Bearings , and Bearing. c. Remove the Allen Head Dog Point Screw from the si de of the Gear Casing. R emove the Internal Gear and Bearing. 3. On the URW - 8N...
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- 6 -Disassembly and Reassembly of the Gear Casing (cont.) Re assembly 1. Grease all Bearings, Gears , and Internal Gears. 2. For the URW - 6 Only : a. Install the Bearing, Internal Gear , and Allen He ad Dog Point Screw into the Gear Casing. b. Install the Needle Roller Bearing into the Planet Gears and both Planet Gears into the Gear Cage. P ut the Roller Pins in to the Gear Cage and thr ough the Planet Gears. c. Install the Spacer onto the Gear Cage and install the Gear Cage...
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- 7 -Disassembly and Reassembly of the Gear Casing (cont.) URW - 6 - Gear Casing Part Number Description Part Number Description 1 2 3 4 5 6 7 8 9 10 Cam Bearing Thr ust Washer Connector Cam Casing Lock Nut Grease Cup Set Screw Spacer Roller Pin Needle Roller Pin 11 12 13 14 15 16 17 18 19 20 Planet Gear Spacer Thrust Bearing Adjusting Spacer Gear Casing Bearing Internal Gear Gear Cage Bearing Spacer
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- 8 -Disassembly an d Reassembly of the Gear Casing (cont.) URW - Gear Casing Part Number Description Part Number Description 1 2 3 4 5 6 7 Cam Bearing Spacer Thrust Bearing Set Screw Gear Casing Internal Gear 8 9 10 11 12 13 Key Planet Gear Roller Pin Bu shing Gear Cage Bearing