Aimco Brakes Pulse Tool UAT Series Repair Manual

							 
– 11 – 
Disassembly and Reassembly of the Air Motor (cont.) 
 
 
 
UAT- Air Motor 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  Part 
Number 
 
Description 
 Part 
Number 
 
Description 
 
1 
2 
3 
4 
5 
6 
7 
8 
9 
 
Casing Connector 
Piston Reset Spring 
Front Air Motor Bearing 
Nylon Ball Plug 
Roll Pin 
Blade 
Roll Pin 
Air Motor Cylinder 
Roll Pin 
 
10 
11 
12 
13 
14 
15 
16 
17 
 
 
Rear Air Motor Plate 
Rear Air Motor Bearing 
O-Ring 
Rear Plate Spacer 
Front Air Motor Plate 
Rotor 
Handle O-ring 
Handle 
 
    
						

							 
– 12 – 
Disassembly and Reassembly of the Shut-off Valve Section 
 
 
Disassembly: 
 
1. Remove the Valve Cover using the Valve Cover Fixture (right-hand thread) from the back of the Handle. 
 
2. Remove the Supporter Ring, Cushion Spacer, Shut-off Valve, Supporter Ring, Shut-off Valve Spring, and 
Ball from the Handle. 
 
3. Remove the Valve Plug from the side of the Handle and remove the Shut-off Valve Bushing from inside of 
the Handle. 
 
4. Clean and inspect all parts. Replace all worn or damaged parts. 
 
Assembly: 
 
1. Lightly lubricate all O-rings and install on Shut-off Valve Bushing. 
 
2. Install the Shut-off Valve Bushing into the Handle. Make sure to line up the hole in the side of the Shut-off 
Valve Bushing with the hole on the side of the Handle. 
 
3. Install the Valve Plug snugly into place, making sure not to over-tighten the Valve Plug or you could 
damage the O-ring and the tool will not shut-off. Note:  The Valve Plug should be torqued to 1.0-1.5 Nm. 
 
4. Install the Ball, Spring, Supporter Ring, Shut-off Valve, Cushion Spacer, Supporter Ring, and Valve Cover.  
Note: The Valve Cover should be torqued to 20-30 Nm for the UAT-30D ~ UAT-80 and 30-40 Nm for the 
UAT-90 ~ UAT-200. 
 
5. You are ready to test the tool. 
 
 
    
						

							 
– 13 – 
Disassembly and Reassembly of the Shut-off Valve Section (cont.) 
 
 
 
UAT-Shut-off Valve 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  Part 
Number 
 
Description 
 Part 
Number 
 
Description 
 1 
2 
3 
4 
5 
6 
7 
8 
 Valve Plug 
Handle 
O-Ring 
Shut-off Valve Spring 
Supporter Ring 
O-Ring 
O-Ring 
Shut-off Valve Bushing 
 9 
10 
11 
12 
13 
14 
15 
 
 O-Ring 
Supporter Ring 
Cushion Spacer 
Operating Rod 
Shut-off Valve Ball 
Shut-off Valve 
Valve Cover 
    
						

							 
– 14 – 
UAT Series Fill & Draw Sheet 
 
 
Fill & Draw Sheet 
 
Key Model of this  
Tool Group 
 
Full Volume 
of Liner Oil 
in Pulse Unit 
(approx.) 
Volume to be 
Removed from 
the Full Volume 
(approx.) 
Torque to 
Tighten Liner 
Casing Setter 
(approx.) 
Torque to 
Tighten Liner 
Casing Setter 
(approx.) 
Load to 
Press on 
Rear Liner 
Plate 
Load to 
Press on 
Rear Liner 
Plate 
     Hydraulic Press P.T.R.F. 
Model cc’s cc’s NM Ft-Lbs Tons Ft-Lbs/Nm 
UAT-30D(SD) 5.0 0.19+/-.01 85+/-5 63+/-4 1 20/27 
UAT-40(S)(D), UAT-50(S)(D) 5.6 0.26+/-.01 85+/-5 63+/-4 1 20/27 
UAT-60(S)(D) 6.2 0.35+/-.01 85+/-5 63+/-4 1 20/27 
UAT-70(S) 8.8 0.60+/-.05 110+/-5 81+/-4 2 40/54 
UAT-80 12.0 0.80+/-.05 135+/-5 100+/-4 2 40/54 
UAT-90 14.0 0.90+/-.05 150+/-5 110+/-4 3 60/81 
UAT-100 21.5 1.40+/-0.1 185+/-10 137+/-7 3 60/81 
UAT-130 24.0 1.40+/-0.1 185+/-10 137+/-7 3 60/81 
UAT-200 81.5 5.60+/-0.1 320+/-10 236+/-7 4.5 90/122 
 
    
						

							 
– 15 – 
UAT Series Troubleshooting 
 
 
Troubleshooting 
 
 
   TROUBLE CAUSE SOLUTION 
No Shut-off 
 
 
Low Air Pressure Make sure that you have 85 PSI 
at the tool while running the tool. 
Low Oil in the Pulse Unit Add .10cc of oil and/or re-tank the 
Pulse Unit. 
Air Motor Dry; No Lubrication Lubricate the Air Motor. 
Loss of Power in the Air Motor Reset the Air Motor. 
Premature Shut-off Shut-off Valve Ball Pushed into 
Spring 
Reset the Ball in the Shut-off 
Valve Bushing. 
Too Much Oil in the Pulse  Remove .10cc of oil from the 
Pulse Unit. 
Spring between the Pulse Unit 
and the Air Motor Weak or 
Missing 
Replace Spring with new one or 
with a stronger one. 
Spacer between the Pulse Unit 
and the Air Motor Missing 
Replace the Spacer.  The Pulse 
Unit should only move .20mm in 
the Casing. 
Too Much Air Pressure Air Pressure should be 85 PSI 
Dynamic. 
Low Torque Air Motor Dry; No Lubrication Lubricate the Air Motor. 
Loss of Power in the Air Motor Reset the Air Motor. 
Spring between the Pulse Unit 
and the Air Motor Weak or 
Missing 
Replace Spring with new one or 
with a stronger one. 
Low Oil in the Pulse Unit Add .10cc of oil and/or re-tank the 
Pulse Unit. 
Low RPM’s Exhaust Filter Dirty Replace the Filter in the Silencer. 
Air Motor Dry; No Lubrication Lubricate the Air Motor. 
Loss of Power in the Air Motor Reset the Air Motor. 
 
 
Recommended Preventative Maintenance: 
 
It is recommended that after every 200,000 pulsing seconds or 180 days, the fluid in the tool’s pulse unit be 
changed. At such time, it is also recommended to grease the bearings in the air motor. If the presence of water is 
noted, it is recommended that a small amount of oil be run through the air motor to wash out any rust residue in 
the air motor.  
It is also recommended that after every 400,000 pulsing seconds or 365 days, that a Pulse Unit Repair Kit be 
installed in the pulse unit. This also allows the inspection of hard parts in the pulse unit. 
						

							 
 
 
 
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LIT-MAN465    Rev. 07/2016  Printed in USA  ©2016 AIMCO