Product Manual

Maintenance & Servicing

Draining PCU Fluid 5

5-3

gmg11.eps

Figure 5-1. PCU Assembly

Table 5-1. PCU Assembly - Parts List

Item Description Part

1 Weight Carrier SPEC

2 Set Screw 3910313

3 Cylinder SPEC

4 Piston SPEC

5 Cylinder Retainer 3919216

Draining PCU Fluid

Note

In order to prevent contamination of the pneumatic system, the PCU

lubricating fluid must be drained from the PCU housing before

commencing any maintenance procedures that involve moving the

instrument from the horizontal position. This includes packing the

instrument for storage or shipment.

1. Depressurize the system by slowly opening the exhaust valve.

2. Disconnect any DUT from the test port.

3. Place absorbent cloth or tissue paper around the base of the PCU housing.

4. Unscrew drain plug at the lower, rear of the housing to release fluid.

5. To increase flow rate, unscrew filler plug at the upper left hand side of the housing.