Gasboy Atlas Start-up - Manual (Page 172)

Page 6-52 MDE-4334D Atlas™ Start-up and Service Manual · July 2013
Hydraulic/Mechanical Components Pumping Unit
Servicing Strainer Check Valve
This section explains about servicing the strainer check valve.
Removing Strainer (or Strainer/Check Valve)
Check valves (if equipped) are to be replaced only if the pumping unit is experiencing frequent
loss of prime, indicating that the check valve is not functioning. A check valve must be
installed when a tank check valve is not available. Always use a strainer with the pump.
Failure to use a strainer may cause premature pumping unit failure and may void warranty.
The strainer must be kept clean to ensure proper operation and to extend the life of the
pumping unit.
Figure 6-28: Strainer Check Valve
Strainer Cover
Pump Shaft
Pump Vent
Pump Casing
Strainer or

Strainer/Check Valve
Bypass Valve
Gasket
PCV
Allen Hex
Side View Rear View
The Inlet Strainer Check Valve is required on all TW1M pumps and model 9840K
and 9140K pumps for proper operation. If the pumping unit is replaced on these
models, you must also install an Inlet Check Valve Kit (M04920K109). Failure to
include an Inlet Strainer Check Valve on these models will result in reduced flow
rate and fuel discharge from the adjacent pump sump vent.
CAUTION