Contents Page Number 1. Tools Needed for Repair 2. Pneumatic Screwdriver Repair Fixtures 3. Disassembly and Reassembly of the Clutch 4. Exploded View of the Clutch Assembly 5. Disassembly and Reassembly of the Gear Section 6. Exploded View of the Gear Casing Assembly •...
Pneumatic Screwdriver Repair Fixtures US-LT Series Jig List Jig to Insert the Band on the Anvil Part Model Number Number 471-670-7-1 US-LT Series Jig to Hold Tool for Disassembly & Reassembly Part Model Numbers Numbers 459-025-1-0 US-LT10 & US-LT20 408-025-1-0 US-LT30 &...
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.
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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.
Exploded View of the Clutch Assembly US-LT Series Part Part Description Description Number Number Bushing 3/32 Steel Ball Clutch Casing Sleeve Anvil Spacer O-Ring Snap Ring Clutch Casing Spring Retainer Bit Sleeve Spring Setter Regulator Screw Cam Ring 3/32 Steel Ball Bit Band Torque Spring Anvil...
Disassembly and Reassembly of the Gear Section Disassembly 1. Remove Gear Casing from 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.
Exploded View of the Gear Casing Assembly US-LT30B-11 Series US-LT20B-18 Part Part Description Description Number Number Gear Casing Ball Bearing Needle Roller Spacer Planet Gear Spacer Gear Cage Internal Gear - 7 - October 2006...
Exploded View of the Gear Casing Assembly US-LT Series Part Part Description Description Number Number Snap Ring Needle Roller Bearing Rotor Gear Spacer Spacer Gear Casing First Gear Cage Planet Gear Second Gear Cage Needle Roller Planet Gear Planet Gear Planet Gear Needle Roller Gear Cage...
Disassembly and Reassembly of the Air Motor Section Disassembly 1. Remove the Air Motor Casing from the Gear Casing. 2. Taking hold of the end of the Rotor, pull the Air Motor out of the Casing. 3. Pull the Front Plate off and remove the Bearing. 4.
Exploded View of the Air Motor Assembly US-LT Push to Start Series Part Part Description Description Number Number Gear Casing Air Inlet Bushing Bearing Spacer Front Plate Roll Pin Roll Pin Rotor Spring Blade Reverse Valve Cylinder Reverse Valve Bushing Rear Plate Bearing Valve Rod...
Exploded View of the Air Motor Assembly (cont.) US-LT Pistol Series Part Part Description Description Number Number Bearing Reverse Valve Front Plate Valve Rod Bushing Blade Roll Pin Roll Pin Cylinder Spring Roll Pin Ball Bearing Reverse Valve Bushing Rear Plate Spacer O-Ring Valve Rod Ball...
Exploded View of the Air Motor Assembly (cont.) US-LT Lever Series Part Part Description Description Number Number Ball Bearing Valve Roll Pin Filter Blades Exhaust Deflector Cylinder Air Inlet Bushing Rear Motor Plate Front Motor Plate Ball Bearing Roll Pin Valve Rod Rotor Rear Plate Spacer...
Disassembly and Reassembly of the Angle Head Section Disassembly 1. Loosen and remove the Angle Head Casing Cover, Driven Gear, and Driven Gear Spindle. 2. Loosen Locking Nut from the Clutch Casing and remove the Angle Head Casing. 3. Remove the Bearing from down inside the Angle Head Casing and remove the Driving Gear. 4.
Exploded View of the Angle Head Assembly US-LT Series Part Part Description Description Number Number Angle Head Casing Cover Needle Roller Bearing Adjusting Spacer Driven Gear 1/16 Steel Ball 1/8 Steel Ball 1/8 Steel Ball Spring Driven Gear Angle Head Casing Cover Driven Gear Spindle Adjusting Spacer Round Plate...
LT Series Troubleshooting PROBLEM CAUSE SOLUTION Loses torque every time the fastener is The Lock Pin did not get put Put the Lock Pin in the back into the Spring Retainer. Spring Retainer. run down. Finally the tool will not run. One or more of the shoulders Tool operates intermittently.
Recommended Preventative Maintenance It is recommended that the whole tool be cleaned and inspected every 250,000 cycles or six months, whichever occurs first. - 16 - October 2006...
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