Aimco Brakes Screwdriver LT Screwdriver Repair Manual

PO 
Box  16460,  Portland, OR  97292-0460   503-254-6600   Fax  503-255-2615  Lite - Touch Series  
Pneumatic Screwdriver Repair Manual  
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Contents  
Page  
Number  
1. Tools Needed for Repair 1  
2. P neumatic Screwdriver Repair Fixtures 2  
3. Disassembly and Reassembly of the Clutch 3 - 4  
4. Exploded View of  the Clutch   Assembly 5  
5. Disass embly and Reassembly of the Gear Section 6  
6. Exploded View of  the  Gear Casing Assembly
 US - LT30B - 11 Series 7  
 US - LT20B - 18 7  
 US - LT Series 8  
7. Disassembly and Reassembly of the  Air Motor Section 9  
8. Exploded View of  the  Air Motor Assembly
 US - LT   Push to Start...

- 1   -Tools Needed fo r Repair  
US - LT Drivers  
1. Phillips  D river s ( #1 & #2 )
2. Dental Pick
3. Pin Spanners ( # 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 & Horses hoe Washer Pliers (Proto - P250)
11. Propane Torch (Turner Self - Lighting) 

- 2   -Pneumatic Screwdriver Repair Fixtures  
US - LT Series Jig List  
Jig  t o Insert  t he Band  o n  t he Anvil  
Part  
Number   Model Number  
471 - 670 - 7 - 1 US - LT Series  
Jig  t o Hold Tool  for  Disassembly & Re assembly  
Part  
Numbers   Model Numbers  
459 - 025 - 1 - 0 US - LT10 & US - LT20  
408 - 025 - 1 - 0 US - LT30 & US - LT40  
444 - 025 - 4 - 0 US - LT50   

- 3   -Disassembly and Reassembly of the Clutch  
Disassembly  
1. Separate the Clutch Casing from the Gear  Casing and remove the Clutch Assembly.
2. Remove the Regulator Screw by inserting a Phillips Driver between it and the Retainer and turning the
Phillips Driver counter - clockwise.
3. Slide the Retainer off the Anvil.     Make sure not to lose the Pin that  locks the Retainer to the Anvil.
4. Remove the Torque Spring, Spring Setter, and Back - up Ring from the Anvil.
5. Carefully slide the Cam...

- 4   -Disassembly and Reassembly of the Clutch   (cont.)  
7. Slide the Cam Ring down onto the   Balls.
8. Put the Back - up Ring and Spring Retainer down onto the Cam.
9. Install the Torque Spring and Retainer onto the Anvil.
10. Line the slot in the Anvil with the slot in the Retainer and install the Locking Pin.
11. Thread the Regulator Scre w onto the Anvil (counter - clockwise) .
12. Install the Clutch back into the tool and test. 

- 5   -Exploded View of the Clutch Assembly  
US - LT Series  
Part  
Number   Description   Part  
Number   Description  
1  
3  
4  
5  
6  
7  
8  
9  
10  
1 1  
1 2  
1 3  
1 4  
1 5   Bushing  
Clutch Casing Sleeve  
O - Ring  
Clutch Casing  
Spring  
Bit Sleeve  
Regulator Screw  
3/32 Steel Ball  
Torque Spring  
Back - up Ring  
1/8 Steel Ball  
Notch Pin  
3/16 Steel Ball  
“G” Pin   1 6  
1 7  
1 8  
1 9  
20  
2 1  
2 2  
2 3  
2 4  
2 5  
2 6  
2 7  
2 8   3/32 Steel Ball  
Anvil  Spacer...

- 6   -Disassembly and Reassembly of the Gear Section  
Disassembly  
1. Remove Gear Casing f rom the Air Motor Casing (right - hand thread).
2. Remove the   Snap Ring from the front of the Gear Casing.
3. Remove the Planet Gears and the Gear Cage from   the Gear Casing.  In some Gear  Casings ,   the Gear Cage
will come out the front of the Gear Casing.
4. Remove the Bearing from the Gear Casing.
5. Clean all   parts thoroughly.
Inspection  
1. Inspect the teeth of the Gear Casing and Planet Gears for...

- 7   -Exploded View of the Gear Casing Assembly  
US - LT30B - 11 Series   US - LT20B - 18  
Part  
Number   Description   Part  
Number   Description  
1  
2  
3  
4   Gear Casing  
Needle Roller  
Planet Gear  
Gea r Cage   5  
6  
7  
8   Ball Bearing  
Spacer  
Spacer  
Internal Gear