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 Delrin thrust washer/silicone Oring replacement procedure

Tools needed:

1. Spanner wrench
2. sharp dental type tool
3. replacement Orings
4. replacement Delrin thrust washer

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It may be necessary to reposition the amplifier head differently in effort to gain better access to side of the head in need of repair. If so, use indexed plates on two sides of the laser head base before removing and repositioning head so that it can be re-positioned and aligned as it was before the service was required. 

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3. Drain water from head before removing brass retaining nut from head. To do this, disconnect both the input and output quick connect water fittings for the head needing repair:

Next, connect an adaptor piece and hose sufficiently long to reach a bucket placed on the floor to the hose connected to the low side of the head, thus extending that hose to allow water to be drained into the bucket.

Making sure drain hose is aimed into bucket, connect the adaptor to the high side quick connect so that the head can begin to drain.

After the head has drained as much as possible, connect an air-pressurized hose to the high side adaptor and blow the remaining water out of the head.

4. Using the Oring spanner wrench, remove the brass retaining nut from the amplifier head by turning wrench CCW.

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5. Remove Delrin thrust washer. It may be useful to use a piece of tape to help in pulling the washer away from the head.

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6. Remove the Oring using a sharp tool that can pierce the Oring so that the Oring can be pulled off of the rod and way from the head.