A652-01-840 Issue P
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Maintenance kits
3.2 How to use the clean and overhaul kit
Refer to Figure 1 to 4 which show exploded views of the RV pump and use the following procedure to install the
components of the kit. Where necessary, refer to the RV pump instruction manual.
1. Switch off the RV pump, disconnect it from the electrical supply and allow the pump to cool.
2. Drain the oil from the pump. Undo and remove the bolts (327) which secure the oil-box (310) and remove the
oil-box from the pump. Remove any debris from the inside of the oil-box, then clean all surfaces of the oil-box
with a suitable cleaning solution.
3. Dismantle the pump; we recommend that you do not remove the shaft-seal sleeve (109) from the H.V.
rotor (102). Use a suitable cleaning solution to clean all of the surfaces of the components that you will reuse.
4. If the pump has a detachable stainless steel inlet flange (instead of the integral top-plate (208)), remove the
inlet flange and replace the O-ring (005) with the O-ring supplied.
5. Press the outer shaft-seal (124) out of the seal carrier (110). Press through the three 3 mm diameter holes
(located around the bearing bore) in the outer surface of the H.V. stator (101) to remove the inner
shaft-seal (123).
6. Inspect the shaft-seal sleeve (109) for signs of wear. If the shaft-seal sleeve is worn, place the shaft-seal
spacer (C) in the seal carrier (110) before you fit the replacement outer shaft-seal.
7. Use the components supplied in the clean and overhaul kit to replace the corresponding components in the
pump. Ensure that the components are clean before you fit them; before you fit elastomer components, wipe
them with a clean lint-free cloth and lightly lubricate them with the oil which you use in your pump.
8. If you have a clean and overhaul kit (Nitrile), replace the inlet-valve pad (202-3): refer to Figure 4.
9. Remove and inspect the restrictor (226). If necessary, use a suitable cleaning solution to clean the restrictor
orifice.
10.Remove and inspect the filter (if fitted) from the air bleed assembly (201). If necessary, use a suitable cleaning
solution to clean the orifice and the filter.
11.Reassemble the pump. When you refit the side panels (408, 412), ensure that you do not over-tighten the
securing screws. If the side panels are damaged, you must replace them before you operate the pump.
12.Use the oil-box printed gasket (314) supplied in the kit and refit the oil-box (310) to the pump. Fill the pump
with the correct quantity of new oil, then fit an oil mist filter to the pump-outlet and connect the outlet of the
oil mist filter to a suitable exhaust-extraction system.
13.Connect the pump to the electrical supply, then look at the oil-level in the sight-glass and switch on the pump;
check that the oil-level drops by 3 to 5 mm when you switch on the pump. If the oil-level does not drop, refer to
the pump instruction manual.
14.Refer to the RV pump instruction manual for normal operation of the pump.
15.Dispose of the old components and used oil safely in accordance with all local and national safety and
environmental requirements.
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