Inspecting The Pump Components; Installing Pump Wear Kit (Optional); (Optional) - Dometic P030 Installation And Operation Manual

Magnetic-Drive Centrifugal Pump
7 .4 Inspecting the Pump
Components
• Check the pump housing for signs of wear or
damage. Look for signs of rubbing, cracking on thrust
ring, or damage to the front shaft support.
• Check the impeller, drive, thrust ring, bushing, and
running surface between the impeller and the pump
head for wear.
• Replace the bushing if wear causes the dimensions of
the bushing to exceed the maximum diameter limit.
Refer to "Impeller Bushing Wear Tolerance" on page
13 for acceptable dimensions.
• Check the inside and outside of the motor barrier for
wear or signs of rubbing.
• Check the outer drive for rubbing, damage,
corrosion, or loose magnets.
• Check the o-ring for chemical attack, swelling,
brittleness, cuts, or other damage. Replace the o-ring
if it is worn or damaged.
• Check the clamp ring for wear. If it is damaged, it
should be replaced.
• Clean the parts that are to be reused using a mild
cleanser. Remove any abrasive material.
• Check the motor shaft for wear at the seal. If it shows
signs of wear, replace the pump.
• Check the motor bearings by rotating the motor
manually. If the shaft rotation is not smooth or has
radial/axial end-play, replace the pump.
I If needed, contact Dometic Customer Support for a
pump wear kit or pump wet end replacement kit.
7 .4 .1 Impeller Bushing Wear Tolerance
Use the following diagram and table to determine the
wear on the impeller bushing. If the measured inner
diameter exceeds the maximum tolerance, replace the
bushing.
EN
q
8 Impeller Bushing Wear Tolerance
Model
P030
P045
P048
P075
P100
P137
P150
P200
7 .5 Installing Pump Wear Kit

(Optional)

If the impeller bushing must be replaced, follow the
instructions below to install the impeller bushing wear
replacement kit (sold separately) before reassembly.
1. Place the impeller/inner drive assembly with the
impeller facing up in an arbor press. If necessary
support the bottom of the assembly with blocks to
allow the bushing to fall out.
2. Insert a 1 in. (25 mm) diameter plastic or wooden
shaft through the impeller and press the bushing out.
3. Remove the impeller assembly from the arbor press.
4. Place the impeller assembly on a flat surface with the
impeller thrust ring face down.
5. With the slotted face of the replacement bushing
facing the rear of the inner drive, align the flat in the
bushing with the flat in the inner drive magnet.
6. Gently push the bushing into the inner drive until the
bushing bottoms out.
7. Follow the instructions in "7.7 Reassembling the
Pump" on page 14 to reassemble the pump.
Maintenance
q Maximum Impeller
Bushing Inner Diameter
0.415 in. (10.5 mm)
0.515 in. (13.1 mm)
0.780 in. (19.8 mm)
13