Pentair HYPRO 1802C, Installation, Operation, Repair And Parts Manual

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6
Valve Replacement
Erratic or low-pressure operation may be the result of
debris in the Valves or Worn Poppets and/or Seats.
1. Remove the Plugs; then using needle nosed pliers,
remove the Valves (See Figure 10).
2. Remove and discard the old O-ring (See Figure 10).
3. Inspect the Valves for signs of debris and/or wear. If
worn or damaged, replace the Valves and install new
O-rings (See Figure 10).
4. Install the Plugs and tighten them to 25 ft. lbs.
[33.9 Nm] torque (See Figure 10).
Figure 10
Plug
Plug
O-ring
O-ring
O-ring
O-ring
Valve
Valve
Hydraulic Motor Repair Instructions
Disassembly and Repair of the Hydraulic Motor
The work area and motor should be as clean as possible
to prevent contamination of parts.
1. Remove the motor from the pump assembly and place
Hydraulic Motor in vise.
2. Remove Tank Port Adapter and Pressure Port Adapter
with large crescent wrench or 1-1/16" and 1-3/8” box
end wrench (See Figure 11).
3. Using a 9/16" box end wrench, loosen the nut on the
Bypass Adjusting Screw (See Figure 11a).
4. Using a small screwdriver, remove the Bypass
Adjusting Screw from the Motor. (This will remove the
Screw, Nut, Washer and Thread-Seal Gasket.)
5. Using a 1/4" Allen wrench, remove the Socket Head
Cap Screws from the Motor End Plate (See Figure
11).
6. If Motor End Plate will not lift off easily, use a small
screwdriver to carefully pry apart the boss portion of
the End Plate and Gerotor Housing until free (See
Figure 12). If Gerotor Housing will not lift off easily,
carefully pry apart the boss area between the Gerotor
Housing and the Motor Body. (It may be necessary to
alternate sides when prying apart Motor sections.)
Figure 11
Figure 11a
Figure 12
7. Remove both parts of the Gerotor.
8. Remove the Roll Pin from the Shaft.
9. Remove the o-ring from the Motor End Plate and
Body with a flat instrument such as a knife blade.
10. Inspect Motor End Plate, Body and Gerotor Housing
for wear and/or gouging. If gouging has occurred in
both the Motor End Plate and Body, the motor is not
repairable. If gouging has occurred in the Motor End
Plate, Body or Gerotor Housing, the part that is worn
must be replaced. If Gerotor Housing is damaged,
Gerotor parts must also be replaced.
To Remove the Shaft Assembly from the Motor Body
Special attention should be exercised when working
with retaining rings. Always wear safety goggles
when working with spring or tension loaded
fasteners or devices.
1. Using the large retaining ring pliers, remove the
Retaining Ring next to the Ball Bearing in the Motor
Body.