Mounting Flange - Pentair HYPRO HM1C Product Bulletin

3. Using a screwdriver and hammer, tap out the stationary
portion of the Mechanical Seal from the motor side of
the Mounting Flange. (If the motor is not removed, the
seal can be pried out with a small screwdriver.)
The seal will be damaged by removal in this manner. A
new seal must be used when pump is reassembled.
Clean-Up Of Pump Housing
1. Using a circular bottle-type wire brush with air or hand
drill, clean the Outlet Port, Inlet Port and the sealing
areas of the o-ring on the Pump Casing and Mounting
Flange. Using the port brush, clean the seal cavity in the
Mounting Flange. [The last step should not be
performed on the 9300P.]
2. After wire brush cleaning, it is recommended that the
Pump Casing and Mounting Flange be further cleaned
in a solvent tank to remove rust and corrosion particles.
Seal Replacement/Pump Housing Reassembly
If the hydraulic motor requires repair, proceed to
Disassembly and Repair of the Hydraulic Motor in the
next column.
1. Lubricate the seal cavity in the Mounting Flange with
WD-40 , LPS or equivalent. Do not lubricate the shaft.
®
2. Install the stationary portion of the Mechanical Seal by
sliding over the Shaft with the ceramic side out.
Make sure both the seal cavity and seal are clean and
lubricated.
3. To seat the seal in the seal cavity, use a piece of 3/4"
PVC pipe 4" to 6" [101.6 to 152.4 mm] in length.
Lubricate sealing surface on seal after it is seated. Do
not lubricate the shaft.
4. To install the rotary portion of the mechanical seal, place
it over the shaft with the carbon side facing in, and
press against the stationary portion (See Figure 9).
5. Install rubber gasket 1700-0100 over shaft against
rotary portion of seal.
Figure 9
On Models 9305C-HM3C-SP, 9505C-HM3C-BS and
9305C-HM3C, install the washer on the shaft prior to
installing the impeller nut.
The threads of the Plastic Seal Nut are fine and can be
easily cross threaded. To prevent cross threading, turn
the Plastic Seal Nut counterclockwise until area of
thread engagement is detected; then turn the Plastic
Seal Nut clockwise until it is secure. Do not over tighten
the Plastic Seal Nut.
6. Insert a Woodruff Key into the Shaft key slot; then place
the Impeller on the Shaft and align it with the Key and
press against the Mechanical Seal Assembly. Apply a
blue thread locking compound to the Impeller Nut, and
using a 5/8'' socket wrench and using a screwdriver to
hold the Impeller, install the Impeller Nut. [On
polypropylene models, insert the Woodruff Key into the
Shaft key slot. Place the Impeller on the Shaft and align
it with the Key; then press against the Mechanical Seal
Assembly. Place the Metal Seal Washer on the Shaft.
Apply a drop of blue thread locking compound on the
Impeller Nut and secure the Impeller to the Shaft as
described previously.]
7. Install the o-ring on the mounting flange. Replace the
o-ring if worn or damaged.
8. Place the pump casing on the mounting flange, insert
and tighten the bolts.
Disassembly and Repair of the Hydraulic Motor
The work area and motor should be as clean as
possible to prevent contamination of parts.
Figure 10
1. Remove the Mounting Flange from the motor body 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 10).
3. Using a 9/16" box end wrench, loosen the nut on the
Bypass Adjusting Screw (See Figure 10a).
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 10).
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
11). If Gerotor Housing will not lift off easily, carefully pry
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Figure 10a