Aimco Brakes Pulse Tool ULT Series Repair Manual

Disassembly and Reassembly of Air Motor 
– 11 – 
1. Remove  the  Casing  (left-hand 
thread),  Pulse  Unit,  Spacer, 
Spring, and  Operating  Rod 
from the Handle. 
2. With  the  Casing  Connector 
Fixture,  remove  the  Casing 
Connector  (left-hand  thread) 
from the Handle. 
3. Remove  the  Front  Air  Motor 
Plate,  Rotor,  Cylinder,  Blades, 
Rear  Air  Motor  Plate,  O-ring, 
and Rear Plate Spacer from the 
Handle. 
4. Remove the O-rings from inside 
of the Handle. 
5. Remove  the  Bearings  from...

Disassembly and Reassembly of Air Motor 
– 12 – 
9. Line  up  the  pin  on  the  side  of 
the Front Plate  with the cut-out 
on the inside of the Handle and 
install  the  Air  Motor  into  the 
Handle. 
10. Install the Casing Connector into 
the  Handle.  The  recommended 
torque  for  the  ULT-30 - 80  is  
45  Nm  +/-5,  for  the  ULT-90  is  
50 Nm +/-5, for the ULT-100-130 
is 60 Nm    +/-5,  and  for  the  ULT-
150  is  65  Nm  +/-5.  Make  sure  to 
use  a  good  service  removable 
thread...

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

Disassembly and Reassembly of the Shut-off Valve Section 
– 14 – 
 
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...

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

ULT Series Fill & Draw Sheet 
 
– 16 – 
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 
ULT-30 (D)(S) 5.0 0.30+/-.01 85+/-5 63+/-4 1 20/27 ULT-40(S)(D) & 50(S)(D)(C),  5.6 0.35 -.04...

ULT Series Troubleshooting 
– 17 – 
 
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...

Recommended Preventative Maintenance 
– 18 – 
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...

 
 
 
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