Disassembly And Reassembly Of The Pulse Unit - Aimco UAT Series Repair Manual

Disassembly and Reassembly of the Pulse Unit

Disassembly
1. Remove the Front Casing (left-hand thread) from the tool.
2. Remove the Purple Cushion from the Pulse Unit and the Pulse Unit from the Handle. Be sure not to lose the
Adjustment Spacer, Spring, and/or Operating Rod that are between the Handle and Pulse Unit.
3. Remove the Oil Fill Plug and extract all of the oil with the VCE-1-1 from the Pulse Unit. Note: The Oil Fill
Plug on the UAT-30D is in the Rear Liner Plate.
4. Place the Pulse Unit in the PTRF-1-1 or the Stand for Holding Pulse Unit and remove the Liner Casing Setter
using the PTRF-039, PTRF-040, PTRF-041, PTRF-042 or Disassembly and Assembly of Liner Casing Setter
(right-hand thread).
5. While holding the Pulse Unit with the Anvil up, tap on the Anvil with a Dead Blow Hammer to remove the
Rear Liner Plate, Anvil, Driving Blades, Driving Blade Rollers, Relief Valve Spring, Relief Valve Ball,
Check Valve Spring, and Check Valve Ball. Now remove the Piston from the Rear Liner Plate.
6. Remove the Front Liner Plate and Liner from the Liner Casing. You can use the Anvil with a set of V-Blocks
on the Arbor Press by placing the Anvil driver end-first through the Front Liner Plate and pressing on the back
of the Anvil to push the Front Liner Plate and Liner out of the Liner Casing. Note: Always make sure that the
Front Liner Plate and Liner come out of the Liner Casing as one piece or you may cause serious damage to the
Liner Casing. Never push too hard on the Arbor Press. Always push the Front Liner Plate and Liner back and
forth in the Liner Casing until the Front Liner Plate and Liner move freely from the Liner Casing.
7. Separate the Front Liner Plate and Liner. Note: On the UAT-30D, 40, 50 & 60 series tools, the Front Liner
Plate is made up of two pieces: the Front Liner Plate and the Liner Casing Spacer.
8. Remove the Relief Valve Spindle (left-hand thread), Relief Valve Pin, Relief Valve, Pressure Valve Body,
Pressure Valve Spring, Pressure Valve Spring Collar, and Locator Pins from the Liner.
9. Remove all O-rings and Supporter Rings. Clean and inspect all parts. Resurface only those parts having burs
on them. If any parts show deep grooving or surface wear, they will need to be replaced.
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