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the end of your finger). Use the same technique to install the other valve seat in the bore for the
intake check valve assembly. It too should be installed with the beveled edge of the valve seat
facing outward, or against your finger.
3. With its cross side facing down (facing the valve seat), lower a new poppet valve into the bore for
the reject check valve. The poppet valve should be level and in the center of the valve seat at the
bottom of the bore. Observe that one end of the valve retainers has a shallow hole that is the same
diameter as the valve spring. Press a new spring into the hole in one of the retainers. When
installed correctly, the spring should stay in the valve retainer when it is inverted. Lower the spring
and valve retainer into the reject check valve bore with the spring facing the poppet valve. Make
sure the tube fitting still has an o-ring installed and then screw it into the reject check valve hole
and tighten securely with the 7/8" open-end wrench. Test your installation by inserting a small
screwdriver into the hole for the reject check valve on
the side of the check valve plate opposite the tube
fitting. The reject poppet valve should move up and
down slightly.
4. Screw the plastic intake hose barb into the check
valve plate (See Figure R-2). Then, working from the
other side of the check valve plate, install a new
poppet valve, valve spring and valve retainer, using
the same procedure as was used for the reject check
valve assembly. Lubricate a new o-ring (8012830)
with silicon grease and install it into its groove in the
pump side of the check valve plate.
5. Taking care that the intake check valve components
do not fall out of their bore, bring the check valve plate and the pump body together, align them,
and install the six sockethead flange bolts to hold the assembly together. Tighten these fasteners
snugly. (If a torque wrench is available, tighten to approximately 120140 in.-lbs.) Use a pencil
eraser or small screwdriver to test the action of the intake poppet valve. See Figure R-6.
6. Lubricate the inside of the cylinder in the pump body with silicon grease. Insert the piston assembly
through its hole in the pump back plate and
slide it as far as it will go toward the pump
back plate, as shown in Figure R-7. Install
the two o-rings (8012830) and (8012444) in
their grooves in the pump back plate. Make
sure the relief valve spring is installed in the
pump body. Bring the pump back plate and
pump body together carefully, first guiding
the piston into the cylinder in the pump body,
and then pressing the back plate as close as
possible to the pump body. Install the four
sockethead flange bolts and tighten snugly
(approximately 120140 in.-lbs.)
5


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