Aimco Brakes Nutrunner UAN Series Repair Manual

PO 
Box  16460,  Portland, OR  97292-0460     503-254-6600     Fax  503-2 55-2615   UAN Series  
Pneumatic Nutrunner  
Repair Manual  
www.aimco-global.com 

Contents  
Page  
Number  
1. Tools Needed for Repair of UAN Series Pneumatic Nutrunner 1  
2. Disassembly and Reassembly of Clutch (UAN 611R & 701R) 2 - 3  
3. Disassembly and Reassembly of Clutch (UAN   830 & 950) 4 - 5  
4. Disassembly and Reassembly of Gear Section 6 - 7  
5. Disassembly and Reassembly of the Angle Head Section 8 - 9  
6. Disassembly and Reassembly of the Air Motor 10 - 11  
7. Troubleshooting and Preventative Maintenance 12   

- 1   -Tools Needed for R epair of UAN Series  
1. Phillips Driver #1 and #2
2. Dental Pick
3. Pin Spanner (351)
4. Needle Nose Pliers
5. Pin Punch
6. Ball Peen Hammer (8 oz.)
7. Standard Pliers
8. Snap Ring Pliers
9. Crescent Wrench
10. Lock Ring and Horseshoe Washer Plie rs (Proto - P250)
11. Propane Torch (Turner Self - Lighting)
12. 471 - 670 - 7 - 1 Jig to Insert the Notch Pin Band on the Cam Guide
13. 517 - 065 - 4 - 5 Jig for Disassembly and Assembly of Driving Gear Spindle Screw
14. 268 - 488 - 6...

- 2   -Disassembly and Reassembly of Clutch UAN - 611R and 701R  
Disassembly  
1. Separate the clutch casing (left hand) from   the gear casing and remove the clutch assembly.
2. Remove the regulator screw by inserting a Phillips driver between it and the stopper and turn the Phillips
driver counter - clockwise to remove the regulator screw.
3. Remove the stopper being careful not to lo se the pin that locks the stopper to the cam guide.
4. Remove the torque spring and spring setter from the cam guide....

- 3   -Disassembly and Reassembly of Clutch UAN - 611R and 701R  (cont. )
UAN - 611R & 701R Clutch  
Part  
Number   Description   Part  
Number   Description  
1  
2  
3  
4  
5  
6  
7  
8  
9   Cam  
Pilot Pin Reset Spring  
Inner Snap Ring  
Pilot Pin  
Cam Roller  
Notch Pin  
Cam Ring  
Spring Setter  
Torque Spring   10  
11  
12  
13  
14  
1 5  
16  
17   Steel Ball  
Regulator Screw  
Cam Balls  
Pilot Pin Reset Ball  
G Pin  
Notch Pin Band  
Stopper  
Stopper Pin   

- 4   -Disassembly and Reassembly of Clutch UAN - 830 & 950
Disassembly  
1. Remove the gear casing from the clutch casing (right hand).
2. Locate the lock  pin on the side and in the threaded portion of the clutch casing.
3. Push down on the adjusting shaft and remove the lock pin.
4. Remove the adjusting shaft, spring, cam shaft, adjusting ring, and cam setter from the clutch casing.
Inspection  
1. Inspect the cam   shaft lobes for pitting and grooving.
2. Inspect the cam roller for pitting and...

- 5   -Disassembly and Reassembly of Clutch UAN - 830 & 950   (cont.)
UAN - 830 & 950 Clutch  
Part  
Number   Description   Part  
Number   Description  
1  
2  
3  
4  
5  
6   Adjusting  Shaft  
Adjusting Shaft Nut  
Torque Spring  
Spring Setter  
Cam Shaft  
Cam Roller   7  
8  
9  
10  
11   Cam Roller Pin  
Cam Shaft Bearing  
Adjusting Ring  
Cam Setter  
Cam Setter Bushing   

- 6   -Disassembly and Reassembly of Gear Section
Disassembly  
1. Using the flats on the ang le casing to put your crescent wrench on, remove the second gear section (left hand).
2. Remove the clutch casing (left hand) and then remove the first gear section (right hand).
3. Now remove the snap rings, bearings, gear cases, roller pin, and planet gears  from the gear casings.
Inspection  
1. Inspect the teeth of the gear casing, internal gear, and planet gears for pitting and grooving.
2. Inspect needle...

- 7   -Disassembly and Reassembly of Gear Section  (cont.)
First Gear Section UAN - 611R & 701R   Second Gear Section UAN - 611R & 701R  
Gear Section UAN - 830 & 950  
Part 
Number   Description   Part 
Number   Description  
1  
2  
3  
4  
5   O - Ring
Bearing
Spacer
First Gear Cage
Gear Casing 6  
7  
8  
9  
10   Needle Roller  
Planet Gear  
Snap Ring  
Second Gear Cage  
Needle Roller Bearing  8