Aimco UOW Series Istruzioni operative

100000 SE Pine St., Portland, OR 97216 •800-852-1368 •503-254-6600 •www.aimco-global.com

UOW Series

Repair Manual

UOW-11 & UOW-T60 Series

Contents

Page

Number

1. Tools Needed for Repair 2

2. Disassembly and Reassembly of the Air Motor 3

•UOW-11 Air Motor 4

•UOW-T60 Air Motor 5

3. Disassembly and Reassembly of the Clutch

•UOW-T60 6

4. Disassembly and Reassembly of the Gear Section

•UOW-11 8

•UOW-T60 10

5. Disassembly and Reassembly of Bevel Gear Casing Assembly

•Pinion and Bevel Gear Section 12

•Socket and Gearing Section 13

•UOW Bevel Gear Casing 14

6. Toubleshooting and Preventative Maintenance

•UOW-T60 15

•UOW-11 15

Tools Needed for Repair

UOW Series Open-End Wrenches

1. Flat-Head Screwdriver

2. Dental Pick

3. Needle Nose Pliers

4. Pin Punch

5. Ball Peen Hammer

6. Pin Spanner Wrench (Hook Type)

7. Snap Ring Pliers

8. Crescent Wrench

9. Phillips Impact Driver

10. Spanner Wrench (Expanding Type)

11. Propane Torch

12. Thread Locker

Disassembly and Reassembly of the Air Motor

Disassembly

1. Remove the air motor casing from the gear casing connector.

2. Take hold of the end of the rotor and pull the air motor out of the casing.

3. Remove the front plate spacer and locking pin.

4. Pull the front plate off and remove the bearing.

5. Remove blades from the rotor.

6. Press the rotor out of the rear plate bearing and remove the bearing from the rear plate.

7. Thoroughly clean all parts.

Inspection

1. Bearings: Inspect bearings for knocking and side play.

2. Cylinder:Inspect cylinder for waviness.

3. Plates: Inspect plates for grooving.

4. Blades:Inspect blades for splitting and grooving on the sides and ends.

5. Silencer:Inspect silencer for dirt.

6. Replace all worn parts.

Assembly

1. Press greased bearing into the rear plate and over the rotor. Note:There should be a slight drag

between the rotor and the rear plate

2. Lightly oil the blade and install into the rotor flat-side out.

3. Slide the cylinder down over the rotor, and line up the roll pin with the center hole in the rear plate.

4. Grease bearing and press into the front plate. Install the front plate onto the rotor with bearing-side

up.

5. Slide the air motor assembly into the casing, lining up the pinion with the side of the front plate with

the slot in the casing.

6. Install locking pin and front plate spacer.

7. Thread the gear motor casing assembly onto the air motor casing and test the tool.

Disassembly and Reassembly of the Air Motor (cont.)

UOW-11 Air Motor

Part

Number

Description

Part

Number

Description

Front Plate Bearing

Front Plate

Blade

Rotor

Cylinder

Rear Plate

Rear Plate Bearing

Rear Plate Spacer

Packing

Motor Casing

Throttle Lever

Roll Pin

Air Inlet Bushing

Roll Pin

Valve Bushing

Reverse Valve

Valve Rod

O-Ring

Valve Plug

O-Ring

Cone Spring

Valve Rod Cap

Valve

Silencer

Disassembly and Reassembly of the Air Motor (cont.)

UOW-T60 Air Motor

Part

Number

Description

Part

Number

Description

Front Plate Spacer

Blade

Roll Pin

Rear Plate Bearing

Rear Plate Spacer

Casing Bushing

Packing

Casing

Throttle Lever

Roll Pin

Air Inlet Bushing

Front Plate Bearing

Front Plate

Rotor

Cylinder

Rear Plate

Valve Rod

Shut-off Valve

Valve Bushing

Reverse Valve

Valve Rod

O-Ring

Valve Plug

O-Ring

Cone Spring

Valve Rod Cap

Valve

Silencer

Disassembly and Reassembly of the Clutch

UOW-T60 Clutch

Disassembly

1. Separate the hammer casing from the hammer casing connector and remove the clutch assembly.

2. Remove the clutch spring, spring retainer, and backup ring from cam guide.

3. Carefully slide the cam ring up and remove the four balls from under it. Now remove the cam ring.

4. Lift the hooked end of the band spring out of the hole in the cam guide and slide it around the cam

guide until the end of the notch pin is exposed. Now remove the notch pin. CAUTION:Do not

bend or stretch the band spring.

5. Remove the retaining ring from the back of the cam guide.

6. Slide the cam and pilot pin out of the cam guide. Remove the pilot pin from the cam.

7. Remove the ball and spring out of the cam guide.

8. Clean all parts thoroughly.

Inspection

1. Cam:Inspect the cam lobes for grooving where they push the balls out against the cam ring.

2. Pilot Pin:Inspect the shoulder that is pushed up against the notch pin for rounding.

3. Notch Pin:Inspect the ends for rounding.

4. Cam Ring:Inspect the inside surface where the balls ride for pitting and grooving.

5. Balls:Inspect for pitting.

6. Spring:Inspect all springs for tension.

7. Replace all worn parts.

Assembly

1. Press the “G” pin into the pilot pin and install the pilot pin into the cam with the square-end up.

2. Put the spring and ball into the cam guide and slide the cam into the cam guide.

3. Install the retaining ring into the back of the cam guide.

4. Install the notch pin into the cam guide and slide the band spring back into place. Now rotate the

cam and make sure the notch pin is pushing the band up.

5. Put a small amount of grease into each of the holes in the cam guide and install the balls.

6. Slide the cam ring down onto the balls.

7. Put the backup ring and spring retainer down onto the cam ring.

8. Install the clutch spring and set the clutch assembly back in the tool.

9. Test the tool.

Disassembly and Reassembly of the Clutch (cont.)

UOW-T60 Clutch

Part

Number

Description

Part

Number

Description

Hammer Casing Nut

Ball

Regulating Dial

Regulating Screw

Hammer Casing

Bearing

Spring Setter

Ball

Snap Ring

Torque Spring

Spring Retainer

Cam Ring

Spacer

Notch Pin

Notch Pin Band

Spring

Ball

Pilot Pin

Cam

Snap Ring

Thrust Bearing

Retainer

Outer Snap Ring

Cam Guide

Ball

G-Pin

Trust Washer

Disassembly and Reassembly of the Gear Section

UOW-11 Gear Section

Disassembly

1. Remove the gear casing from the air motor casing (right-hand threads).

2. Remove the first and second gear cage and planet gears.

3. Remove bearing from the gear case.

4. Clean all parts thoroughly.

Inspection

1. Gears:Inspect the teeth of the gear casing and the planet gears for pitting and grooving.

2. Needle Rollers: Inspect the needle rollers for wear.

3. Bearings: Inspect bearing for side play and knocking.

4. Replace all worn parts.

Assembly

1. Install the bearing into the gear case.

2. Install the second gear cage into casing.

3. Install the needle roller and second planet gears. Put a small amount of grease by each planet gear

and on the gear cage.

4. Install the gear cage spacer.

5. Install the needle roller and planet gear onto the first gear cage, then slide assembled gear cage into

gear casing (lightly grease all parts during assembly).

6. Install the gear casing assembly onto the air motor casing and test the tool.

Disassembly and Reassembly of the Gear Section (cont.)

UOW-11 Gear Section

Part

Number

Description

Part

Number

Description

Gear Casing

Bearing

Spacer

First Gear Cage

Planet Gear

Spacer

Bearing

Second Gear Cage

Planet Gear

Needle Roller

Spacer

Disassembly and Reassembly of the Gear Section (cont.)

UOW-T60 Gear Section

Disassembly

Note:The UOW-T60 has gearings both before and after the 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 Set of Gearing

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 planet 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 bearing 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.

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