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4.3.2. Rotary Union Seals for Three-Jaw Gripper Stages
4.3.2. Rotary Union Seals for Three-Jaw Gripper Stages
This section applies only to ACS150 and ACS200 stages equipped with the three-jaw gripper chuck option.
Unlike ACS stages with ER collet holders, stages equipped with three-jaw grippers include a sealed rotary
union. Due to friction of the seals on the shaft, wear can occur over a period of time and the seals may
require replacement.
procedure for replacing the rotary union seals.
Table 4-3:
Rotary Union Seal Replacement Part Numbers
Rotary Union Seal (QTY. 2)
1. Disconnect power and air pressure to the stage.
2. Remove the air line from the air input.
3. Remove the four rear seal housing retaining screws and carefully pull the rear seal housing straight off
of the main shaft of the stage.
4. Remove the two retaining rings using a small screwdriver or needle-nosed pliers. Be careful not to
damage the rear seal housing.
5. Pry the air seals from their housings. This may require a small screwdriver or pick. Use caution not to
damage the seal housings.
6. Clean all surfaces before reassembly. See
7. Lubricate the new seals with o-ring lubricant (see
housing. Note the orientation of the seals in
completely by running a fingernail along the edge. If the seal is seated improperly a leak may result.
8. Replace the retaining rings.
54
Figure
4-4. shows an exploded view of the rotary union assembly. The following is the
Figure 4-4:
Exploded Drawing of Rear Seal Components
ACS150
MCA12519
Section 4.2.
for recommended cleaning solvents.
Section
4.2.) and press them into the rear seal
Figure
4-5. Check to make sure that the seals are seated
ACS Hardware Manual
ACS200
MCA02037
www.aerotech.com
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