Page 7-52
MDE-4334C Atlas Start-up and Service Manual · April 2008
Hydraulic/Mechanical Components
Pumping Unit
Figure 7-26: Pumping Unit Servicing
Remove Plastic
Plug after
Assembling Lip Seal
to Remove Shaft
Inner Seal
Lip Seal
Seal
Retainer
Screw
A525702
Stator
The following procedure provides instructions to drain the bulk of the fluid from the pumping
unit. Residual fluid may remain in the pumping unit.
To drain the GPU, proceed as follows:
1
Put an approved tray in place to collect the fuel.
2
The pumping unit contains up to 0.5 liters (1.1 Pints or 0.53 Quarts) of fluid.
3
If sump drainage is desired, the plug on top, right, and rear of the pumping unit casing may be
removed.
4
Manually turn the pumping unit pulley counterclockwise to aid fluid removal.
5
Properly dispose of all fluid drained from the pumping unit.
6
After the pumping unit is drained, replace all plugs using a non-hardening UL-approved pipe
sealant suitable for the type of fluids being used.
Note: Do not use Teflon tape.