Step 3:
Remove the hex bolts and the pump head assembly
from the housing.
Step 4:
Loosen and remove top bushing, ball check spring, ball, gaskets, and top check valve seat.
Remove the retaining ring and O-ring from the top check valve seat.
Step 5:
Loosen and remove bottom bushing, bottom check valve seat, ball, ball cage and gaskets.
Remove the O-ring and retaining ring from the bottom check valve seat.
Step 6:
Unthread packing gland nut and remove plunger, plunger packing gland, packing and lantern
ring.
Housing Maintenance
Housing Assembly
The following Steps 4 through 12 are for one housing assembly.
Step 1:
Ensure all parts are clean and free from damage (see Inspection section).
Step 2:
Bolt down the reducer onto the base plate. Leave bolting loose to allow reducer to move freely
during remainder of assembly process.
Step 3:
Insert keys into the drive shaft. Center the drive shaft into the reducer and tighten fasteners.
Step 4:
Ensure the shaft bearings and crosshead bearings are installed in the pump housing, allowing
the driveshaft to be properly orientated when the housing is correctly bolted to the base plate. Press the
screen into the hole in the bottom of the housing.
Step 5:
Using a petroleum based lubricant, grease the O-ring and slide it into
position on the adjusting screw assembly. Screw the stroke adjustor onto the
adjusting screw assembly. Slide the stroke adjustor into the crosshead
assembly and insert the crosshead pins to hold it in place.
Step 6:
Insert crosshead assembly into the housing with the longer slot facing
up.
Step 7:
Press eccentric cam into the cam bearing to create the eccentric cam
assembly.
Step 8:
Place the eccentric cam assembly into the large slot of the cross head
assembly.
Step 9:
Slide housing onto the base with the drive shaft going through the
housing, crosshead assembly and the eccentric cam assembly. The slot in the
eccentric cam must be lined up with the drive shaft cam key for the housing to
properly slide on.
Note: The cam key must be horizontally located or it will
not fit through the crosshead assembly.
Step 10:
Bolt down the housing
onto the base plate. Install second housing assembly in the same
manner for a duplex unit. Tighten reducer bolting.
