MDE-4334C Atlas Start-up and Service Manual · April 2008
Page 7-51
Pumping Unit
Hydraulic/Mechanical Components
About the GPU
Self-contained Gasboy Atlas pumping units use the Bennett GPU. The case is made of
aluminum and sealing surfaces may be damaged while working on an inappropriate surface.
Figure 7-25: GPU (Four Views)
Front View
Side View
Rear View
General GPU Service Procedures
This service manual contains basic service procedures for the GPU.
Note: For additional GPU service information, refer to MDE-4447 GPU Operation,
Maintenance and Kit Installation Manual.
Draining the GPU
Draining the GPU unit to some extent is necessary while opening the unit for servicing the
strainer, or removing the bypass or control valves.