Dometic PM Series Montagehandleiding En Gebruiksaanwijzing pagina 8
Magnetische aandrijving centrifugaalpomp
Beschikbare talen
Beschikbare talen
EN
5. Remove the screws or bolts and lock-washers (if present) securing the pump head to
the motor adapter/barrier. Use appropriate tools for the fasteners installed.
The P030 pump motor adapter includes the barrier, while other models have a
separate motor barrier and motor adapter.
6. Hold either the pump head or the motor firmly, depending on the size and weight of
the model, and pull straight out to disengage the pump head and motor.
7. If the pump head has the optional O-ring seal, make sure the O-ring remains on the
motor adapter.
8. Place the pump head on a workbench with the housing facing up.
9. Remove the screws or bolts on the outside of the pump housing.
The number of housing fasteners depends on the pump model.
10. Hold the pump housing firmly and pull straight up to remove it from the pump head.
11. Remove the impeller thrust ring, the impeller assembly, the impeller drive assembly,
and then the impeller bushing.
12. Remove the impeller sha.
On the P030 pump, the impeller sha is attached to the motor adapter. For all other
models, the impeller sha is attached to the motor barrier.
13. Remove the motor barrier and barrier O-ring (if present) from the motor adapter.
14. P045, P062, P075, P100, P137, P150, P200 only: If necessary, gently tap on the
backside of the motor barrier with a so wooden or plastic rod to dislodge it.
15. P045, P062, P075, P100, P137, P150, P200 only: Remove the clamp ring and clamp
O-ring from the motor adapter.
16. Tighten the nuts before removal to ensure it does not back out of the pump head.
10.4
Inspecting the pump components
NOTE Contact the Dometic customer support for a pump wear kit or pump
wet end replacement kit, if needed.
Check the pump housing for signs of wear or damage. Look for signs of rubbing,
cracking on thrust ring, or damage to the front sha support.
Check the impeller, drive, thrust ring, bushing, and running surface between the
impeller and the pump head for wear.
Replace the bushing if its dimensions exceed the maximum diameter limit due to
wear. See chapter
Impeller Bushing Wear Tolerance
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.
Replace the worn or damaged clamp ring.
Clean the reusable parts using a mild cleanser.
Remove any abrasive material.
Replace the pump, if the motor sha at the seal is worn or damaged.
Check the motor bearings by rotating the motor manually. If the sha rotation is not
smooth or has radial/axial end-play, replace the pump.
10.4.1
Impeller bushing wear tolerance
1. Use the following diagram and table to decide the wear on the impeller bushing.
8
for acceptable dimensions.
Model
• P030
• P045
• P062
• P075
• P100
• P137
• P150
P200
2. If the measured inner diameter exceeds the maximum tolerance, replace the
bushing.
10.5
Installing pump wear kit
NOTE This kit is optional and sold separately.
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 (25.4 mm) diameter plastic or wooden sha 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 surface in the bushing with the flat surface in the inner drive magnet.
6. Gently push the bushing into the inner drive until the bushing bottoms out.
7. Reassemble the pump (see
Reassembling the pump
10.6
Installing a pump wet end replacement kit
NOTE This kit is optional and sold separately. The kit includes the pump head
that attaches to the motor.
Follow the instructions below to install the pump wet end replacement before
reassembling the pump:
1. For small pumps 2 hp (1.49 kW) or less, place the pump in an upright position on the
fan end of the motor or securely clamp the pump feet to a workbench.
2. For larger pumps with 3 hp (2.24 kW) or greater, place the pump and motor securely
on the floor with the pump head facing up.
3. Remove the screws or bolts and lock-washers (if present) securing the pump head to
the motor fasteners installed.
4. Hold the pump head firmly (or the side that is not clamped) and pull straight out to
disengage the pump head and motor.
5. Align the holes on the replacement pump wet end assembly with the holes on the
motor adapter.
6. Install the screws or bolts and lock washers (if present).
7. Based on the pump model, refer to the figures in section
10.7
Reassembling the pump
P030 reassembly
Bushing inner diameter
0.42 in (10.54 mm)
0.52 in (13.08 mm)
0.78 in (19.81 mm)
on page 8).
Reassembling the
pump.
