Step 6: Rebuild Diaphragm Assembly
a) To rebuild the diaphragm assembly, start by reinstalling
the original protective diaphragm, followed by the original
auxiliary ring.
(
Note!
The auxiliary ring is keyed. Please make sure it lines
up accordingly.)
b) Install the new diaphragm by screwing it in clockwise until it
is hand tight.
c) Once the diaphragm is secure, install the new outer O-ring
into its channel.
d) Finally, you can reinstall the pump head to the pump body.
Tighten the four screws a little at a time in an “X” pattern,
like upper left, lower right, lower left then upper right.
Step 6d:
Reinstall
Pump
Head
Tighten
Screws
in “X”
Pattern
1
1
2
2
3
4
Step 6c:
Install
New
Outer
O-ring
Step 6b:
Install
New
Diaphragm
Step 6a:
Reinstall
Protective
Diaphragm
and
Auxiliary
Ring
Step 7: Rebuild Pump Discharge Fitting
The discharge fitting on your Hydro Xtreme pump is at the top.
a) Start by loosening the compression nut (counter-clockwise),
with a 1 1/8” (290 mm) wrench or an adjustable wrench.
When loosened, unscrew the nut completely and set the
nut, the retaining ring and discharge tube aside.
b) Unscrew the rest of the discharge fitting from the pump
body, using the same size wrench. Remove it from the
pump and slide the O-ring, check valve(s) and spacer from
inside. Take care of the spacer, as it may have to be reused.
c) Replace the spacer, check valve(s) and O-ring with new
parts, and reassemble them into the discharge fitting.
NOTE:
The black ring end of a check valve always faces the
flow, so here they are always towards the bottom.
NOTE:
The new spacer should be the same size as the old
one. If not, re-use the old spacer and please notify Hydro
Systems of the discrepancy.
Step 7a:
Remove
Compres-
sion Nut,
Retaining
Ring and
Tubing
Step 7b:
Remove
Discharge
Fitting
Step 7c:
Rebuild
Discharge
Fitting with
New Parts
This check-valve orientation is correct
only for the upper (discharge) fitting
