Edwards RV3 User manual

A652-01-840
Issue P
Parts and Maintenance Kits Manual
RV3, RV5, RV8 and RV12
Rotary Vane Pumps
A65X-YY-ZZZ
Pump
Type
X
Variant
YY
Motor Description
ZZZ
2 = RV3 01 to 99 903 = 220-240 V, 50/60 Hz, Single phase
3 = RV5 904 = 100/200 V, 50/60 Hz, Single phase
4 = RV8 905 = 200-230/380-460 V, 50/60 Hz, Three phase
5 = RV12 906 = 110-115/120 V, 50/60 Hz, Single phase
925 = 200-230/380-460 V, 50/60 Hz, Three phase set
to low voltage
965 = NEMA Bareshaft
970 = ISO Bareshaft
Original Instructions

Important safety Information
Vacuum pumps are potentially dangerous if incorrectly used, repaired or maintained, so please approach the
repair or maintenance with caution.
Any incorrectly fitted spare parts could damage your pump and could be potentially dangerous.
Never allow unqualified personnel to attempt to remove or replace any part of the pump.
If you have any doubts about the servicing procedures or the products capabilities please contact Edwards.
Before returning any equipment to Edwards for repair please follow the Edwards HS1 procedure and
complete an HS2 declaration form to warn of any substances used or produced in the equipment that can be
dangerous. The procedure and forms are included with the pump instruction manuals and can be down-
loaded together with Edwards local contact details from www.edwardsvacuum.com
Always conform to service schedules unless adverse conditions necessitate more frequent servicing.
Report any defect before an accident or consequential damage can occur.
Observe local and country specific regulations, norms and guidelines.
Never allow anyone to remove large or heavy components without adequate lifting equipment.
Before maintenance work is begun, ensure the pump is switched off and isolated from the mains.
The pump may have been exposed to processes which use hazardous substances or produces by-products
which are dangerous to human health and safety, for example, chemically active, biologically active or
radioactive substances.
Before working on a pump, ensure that the correct personal protective equipment is available and being
used. Always wear safety goggles. Wear a breather mask with positive air pressure and take other
precautions if you believe the pump may be contaminated with hazardous substances and dusts.
When applying sealants and lubricants, prevent contact with the skin by wearing suitable gloves.
Seals may contain fluoroelastomer, which when properly handled is not dangerous but which may produce a
toxic and corrosive residue (hydrogen fluoride or hydrofluoric acid) in the event of excessive heat or fire
depending on the circumstances of degradation and other materials involved.
On completion of maintenance, check the pump functions correctly and that all guards and protection
devices are fitted and working correctly and that the pump is electrically safe.
If the pump is used for handling hazardous substances check the pump for leak-tightness before use.
Dispose of waste oil and any process by-products in accordance with local and national safety and
environmental requirements. It is usually illegal to dispose of waste oil into drains or water courses, or to
bury it.

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Contents
A652-01-840 Issue P
Contents
Section Page
1 Introduction .......................................................................................1
1.1 Scope of this manual ....................................................................................................1
1.2 Safety ......................................................................................................................1
2 Parts list ............................................................................................3
3 Maintenance kits ................................................................................ 13
3.1 Unpack and inspect .....................................................................................................14
3.2 How to use the clean and overhaul kit ..............................................................................16
3.3 How to use the blades kit .............................................................................................17
3.4 How to use the inlet-valve kit ........................................................................................17
For return of equipment, complete the HS Forms at the end of this manual.
Illustrations
Figure Page
1 Exploded view of the RV pump with 1-phase motor (post 2010 configuration) ................................8
2 Exploded view of 3-phase motor assembly ..........................................................................9
3 Exploded view of the cartridge .......................................................................................10
4 Exploded view of the inlet-valve assembly .........................................................................11
Tables
Table Page
1 Parts list ...................................................................................................................4
2 Maintenance kits ........................................................................................................13
3 Checklist of blade kit components ...................................................................................14
4 Checklist of inlet-valve kit components .............................................................................14
5 Checklist of clean and overhaul kit components ...................................................................15
Associated publications
Publication title Publication number
RV Rotary Vane Pumps A652-01-880
RV Pump Cartridge Kits A653-01-840
dcs/8784/10/10

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A652-01-840 Issue P
Page ii © Edwards Limited 2018. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.

© Edwards Limited 2018. All rights reserved. Page 1
Edwards and the Edwards logo are trademarks of Edwards Limited.
Introduction
A652-01-840 Issue P
1 Introduction
1.1 Scope of this manual
This manual provides information about the component parts of the Edwards RV3, RV5, RV8 and RV12 rotary vane
pumps, together with the installation instructions for the clean and overhaul kits, the blade kits and the inlet valve
kit for the pumps. You must use the kits as specified in this manual.
Exploded views of a generic RV pump are shown in Section 2, together with a list of the component parts and an
indication of whether the component parts are available as spares.
Section 3 lists the maintenance kits available for the RV pumps.
Use a clean and overhaul kit to replace the springs, seals and elastomer components in the pumps.
Use a blade kit and a clean and overhaul kit when you replace the blades in the pump.
Use an inlet valve kit to replace the inlet valve assembly in the pump.
We recommend that when you use a kit, you use all the components in the kit.
The contents of the kits and how to install them are defined in Section 3.
1.2 Safety
The dynamic seals and O-rings used in these pumps are made from fluorinated materials. Fluorinated materials are
safe in normal use but can decompose into very dangerous materials (which may include hydrofluoric acid) if they
are heated to above 210 °C and above.
The pump may have overheated if it was misused, or if it was in a fire. If the pump has overheated, take extreme
care to avoid skin contact with any part of the pump and to avoid inhalation of the vapours. Health and safety data
sheets for fluorinated materials used in the pump are available on request: contact your supplier or Edwards.
WARNING
Do not touch or inhale the thermal breakdown products of fluorinated materials which may be
present if the pump has been heated to 210 °C and above. These breakdown products are very
dangerous. Some of the seals in the pump are made from fluorinated materials.

A652-01-840 Issue P
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Parts list
A652-01-840 Issue P
2 Parts list
Exploded views of a generic RV pump are shown in Figure 1 to 4. The component parts shown on the figures are listed
in Table 1. When you read Table 1, take note of the following:
Where a G.A. Item is in the form 'XXX-Y', this specifies that the part is a component of a sub-assembly (that
is, the inlet valve, exhaust flange or ballast knob sub-assemblies). In these cases, XXX specifies the sub-
assembly (and may be shown on Figure 1) and Y specifies the specific component of the sub-assembly.
The entries in the 'Kit No.(s)' column are cross references to the kits in Table 2. If a part has an entry in this
column, then the component part is included in the referenced maintenance kit(s).
If a part has an entry in the 'Part No.' column, then the part is available as a spare and the entry defines the
Item Number of the spare part.

A652-01-840 Issue P
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Parts list
Table 1 - Parts list
Item
No. Description Fig Quantity Kit No.(s) Part No.
RV3 RV5 RV8 RV12
101 H.V. stator: RV3 31 - - - 6 A652-01-700
101 H.V. stator: RV5 3- 1 - - 7 A653-01-700
101 H.V. stator: RV8 3- - 1 - 8 A654-01-700
101 H.V. stator: RV12 3- - - 1 9 A655-01-700
102 H.V. rotor: RV3 and RV5 31 1 - - 6, 7 A652-01-701
102 H.V. rotor: RV8 3- - 1 - 8 A654-01-701
102 H.V. rotor: RV12 3- - - 1 9 A655-01-701
103 L.V. stator: RV3 and RV5 31 1 - - 6, 7 A652-01-702*
103 L.V. stator: RV8 and RV12 3- - 1 1 8, 9 A654-01-702*
104 L.V. rotor: RV3 and RV5 31 1 - - 6, 7 A652-01-703
104 L.V. rotor: RV8 and RV12 3- - 1 1 8, 9 A654-01-703
105 Oil pump stator 31 1 1 1 6 - 9, 20 *
106 Oil pump rotor 31 1 1 1 6 - 9 A652-01-705
107 End plate 31 1 1 1 6 - 9 A652-01-704
108 Oldham coupling (H.V.-L.V.) 31 1 1 1 6 - 9 A652-01-026
109 Shaft-seal sleeve 31 1 1 1 6 - 9, 13
110 Seal carrier 31 1 1 1 6 - 9, 12
111 Reed valve 31 1 1 1, 1 6 - 9, 20 A652-01-029
115 Oil pump blade 31 1 1 1 2 - 9
116 RV3 H.V. Blade 32 2, 6
116 RV5 H.V. blade 32 3, 7
116 RV8 H.V. blade 32 4, 8
116 RV12 H.V. blade 32 5, 9
117 L.V. blade: RV3 and RV5 32 2 - - 2, 3, 6, 7
117 L.V. blade: RV8 and RV12 3- - 2 2 4, 5, 8, 9
118 Reed valve clamp 31 1 1 1 6 - 9 A210-35-129
119 Oldham coupling (L.V.-oil pump) 31 1 1 1 1, 6 - 9, 20 A259-08-127
120 Printed gasket (seal carrier) 31 1 1 1 1, 6 - 9, 12, 20 A271-60-008
123 Shaft seal (inner): 25 x 35 x 7 31 1 1 1 1, 6 - 9, 20 H021-09-066
124 Shaft seal (outer): 20 x 30 x 7 31 1 1 1 1, 6 - 9, 12, 20 H021-09-124
125 70 O-ring: 14.6 i.d. x 2.4 section
(rotor sleeve) 31 1 1 1 6 - 9, 13
127 O-ring: 57.6 i.d. x 2.4 section
(cartridge) 11 1 1 1 1, 6 - 9, 20
129 Screw: cap-head M6 x 20 (seal
carrier securing) 34 4 4 4 6 - 9
130 Screw: cap-head M6 x 40 (end cover
securing and LV to HV securing) 34 4 4 4 6 - 9

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Parts list
A652-01-840 Issue P
131 M6 x 30 cap screw (coupling) 31 1 1 1 6 - 9
132 Coupling hub 31 1 1 1 6 - 9 A210-35-128
133 Baffle 31 1 1 1 6 - 9 A210-35-130
201 Air bleed assembly 11 1 1 1 1, 20 A652-01-005
202 Inlet valve assembly 11111 10
202-1 Valve cover 41111 10
202-2 Piston 41111 10
202-3 Valve pad 41111 10
202-4 Bush 41111 10
202-5 'U' seal 41 1 1 1 1, 6 - 10, 20
202-6 O-ring: 49.5 i.d. x 3.0 section 41 1 1 1 1, 6 - 10, 20 237-24-071
202-7 O-ring: 7.6 i.d. x 2.4 section 41 1 1 1 1, 6 - 10, 20 237-12-039
202-8 O-ring: 32.5 i.d. x 3.0 section 41 1 1 1 1, 6 - 10, 20 234-24-070
203 Gas ballast control assembly 11 1 1 1 A652-01-008
203-1 Gas ballast knob 11111
203-2 Filter 11111
203-3 O-ring: 14.6 i.d. x 2.4 section
(gas ballast control 11 1 1 1 1, 6 - 9, 20 H021-20-036
203-4 O-ring: 21.5 i.d. x 3.0 section
(gas ballast control) 11 1 1 1 1, 6 - 9, 20 237-24-073
204 Mode selector assembly 11 1 1 1 A652-01-009
204-3 O-ring: 9.6 i.d. x 2.4 section
(mode selector) 11 1 1 1 1, 6 - 9, 20
206 Adaptor 11111
208 Top plate 11 1 1 1 A210-35-125
209 Oil pressure valve 11 1 1 1 1, 20
210 Gas ballast check valve 11 1 1 1 1, 6 - 9, 20 A265-01-036
211 Spring (valve pad) 12 2 2 2 1, 6 - 9, 20
212 Spring (gas ballast control) 11 1 1 1 1, 6 - 9, 20
213 Spring (inlet valve) 11 1 1 1 1, 6 - 10, 20
215 Printed gasket (cartridge) 31 1 1 1 1, 6 - 9, 20 A271-60-006
216 Printed gasket (top plate) 11 1 1 1 1, 6 - 9, 10, 20 A271-60-00
217 Dump valve 11 1 1 1 1, 6 - 9, 20
219 O-ring: 57.6 i.d. X 2.4 section
(cartridge) 11 1 1 1 116-9 H021-22-055
220 O-ring: 21.5 i.d. x 3.0 section
(mode selector) 11 1 1 1 1, 6 - 9, 20 237-24-073
222 Shouldered washer (gas ballast) 11 1 1 1 1, 20
224 Screw: cap-head M6 x 20
(top plate securing) 14444
225 Screw: cap-head M6 x 40
(cartridge securing) 13333
226 Restrictor: M6 11111
301 Exhaust flange assembly 11 1 1 1 A652-01-007
301-1 Exhaust flange 11111
Table 1 - Parts list (continued)
Item
No. Description Fig Quantity Kit No.(s) Part No.
RV3 RV5 RV8 RV12

A652-01-840 Issue P
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Parts list
301-2 Exhaust pin 11111
301-3 Exhaust diaphragm 11111
302 Inlet filter assembly 11 1 1 1 A223-05-067
306 Baseplate 11 1 1 1 A210-35-126
308 Coupling hub 11 1 1 1 A210-35-128
309 Reed valve baffle 11 1 1 1 A210-35-130
310 Oil box 11111
311 Sight-glass bezel 11111
312 Coupling element 11 1 1 1 116-9 A210-71-077
313 Oil filler plug 12 2 2 2 A259-08-118
314 Printed gasket (oil box) 11 1 1 1 1, 6 - 9, 20 A271-60-005
315 Rubber foot 14 4 4 4 A265-01-041
316 Sight-glass 11 1 1 1 A292-01-018
318 Outlet cover 11111
319 O-ring: 28.2 i.d. x 3.53 section
(outlet flange and filler plug) 13 3 3 3 1, 6 - 9, 20 H021-26-026
321 O-ring: 69.5 i.d. x 3.0 section
(sight-glass) 11 1 1 1 1, 6 - 9, 20 237-24-072
322 Oil drain plug 11111
323 O-ring: 15.6 i.d. X 2.4 section
(drain plug) 11111
325 Screw: cap-head M6 x 30
(coupling securing) 11111
326 Screw: cap-head M6 x 20
(baffle securing) 17788
327 Screw: cap-head M6 x 40
(oil box securing) 14444
331 Outlet label 11111
401 RV3/RV5/RV8 and RV12 Motor kit
(Europe/USA) 50/60 Hz, 450/550 W,
1-phase 220-240/ 230-240 V
1 1 1 1 1 22 A652-99-500
401 RV3/RV5/RV8 and RV12 Motor kit
(Japan) 50/60 Hz, 450/550 W, 1-
phase 100-200/ 200-210 V
1 1 1 1 1 23 A652-98-500
401†Motor assembly: RV3 and RV5
(1-phase) 11 1 - - 14, 16
401†Motor assembly: RV8 and RV12
(1-phase) 1- - 1 1 15, 17
401 Motor assembly: RV3 and RV5
(3-phase) 211 18
401 Motor assembly: RV8 and RV12
(3-phase) 211 19
403 Oil box label 11111
405 Lifting handle 11 1 - - A259-08-125
408 Side panel (mode selector side) 11 1 1 1 A652-01-018
409 Ducting sheet 11 1 1 1 A652-01-019
410 Fan 11 1 1 1 A223-01-007
Table 1 - Parts list (continued)
Item
No. Description Fig Quantity Kit No.(s) Part No.
RV3 RV5 RV8 RV12

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Parts list
A652-01-840 Issue P
410 Fan (Nema motor) 11 1 A223-01-009
11 1 A223-01-009
410 Fan (ISO motor) 11 1 A223-01-010
11 1 A223-01-010
410 Fan (3-phase motor) 21 1 1 1 A223-01-010
411 Coupling element 11 1 1 1 1, 20
412 Side panel (pump logo side): RV3 11 - - - A652-01-017
412 Side panel (pump logo side): RV5 1- 1 - - A653-01-017
412 Side panel (pump logo side): RV8 1- - 1 - A654-01-017
412 Side panel (pump logo side): RV12 1- - - 1 A655-01-017
413 Lifting plate 1- - 1 1 A654-01-023
414 Lifting plate cover 1- - 1 1 A259-08-141
420 Screw: cap-head M4 x 10
(side panel securing) 14444
421 Screw: cap-head M6 x 20
(motor securing) 14444
422 Screw: cap-head M6 x 12
(lifting plate securing) 12222
423 Screw: cap-head M6 x 40
(fan securing) 11111
452 Fan 11 1 1 1 A223-01-010
453 Motor plate 21111
454 Screw: cap-head M5 x 40
(fan securing) 21111
455 Screw: cap-head M6 x 20
(motor to motor plate securing) 21111
B Motor top cover 11111
C Shaft-seal spacer ‡3- - - - 1, 12, 20
D Motor starting relay (Sinpac) 11111 11
*On pumps with Serial number 9721 29 224 and earlier, all items marked thus (e.g. LV stator and oil pump),
stator must be replaced at the same time. On pumps with later serial numbers, they may be replaced
individually. If you fail to observe this practice, the pump will not operate.
†As of the end of 2010, the four RV 1-phase motors (used in kits 14, 15, 16 and 17) have been made obsolete
and replaced by two new motors (item 401). These new motors are suitable for use on all 1-phase RV3, RV5,
RV8 and RV12 pumps.
‡Not fitted to pumps as supplied, but may be fitted as part of maintenance.
Table 1 - Parts list (continued)
Item
No. Description Fig Quantity Kit No.(s) Part No.
RV3 RV5 RV8 RV12

A652-01-840 Issue P
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Parts list
Figure 1 - Exploded view of the RV pump with 1-phase motor (post 2010 configuration)
A Oil pressure/dump valve assembly
B Cartridge: see Figure 3 F Gas ballast check valve assembly D Motor starting relay
202 Inlet valve assembly:
see Figure 4
208 Top-plate 226 Restrictor 310 Oil-box 327 Bolt 408 Side panel 412 Side panel 421 Bolt
* Included in the clean and overhaul kit:
see Table 5
†Included in the Blade Kit: see Table 3 Included in the Inlet Valve Kit:
see Table 4
Included for reference only: see key 

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Parts list
A652-01-840 Issue P
Figure 2 - Exploded view of 3-phase motor assembly

A652-01-840 Issue P
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Parts list
Figure 3 - Exploded view of the cartridge
Note: The main part of this figure shows the component parts of
theRV3 and RV5pumps. Thepartswhich differ visuallyfor the RV8 and RV12 pumps (that is, the RV8 and RV12 H.V. rotor (102) and the RV8 and RV12 H.V. blade (116) ) are shown above the main exploded view.
C Shaft-seal spacer: not fitted to pumps
as supplied, but may be fitted as part of maintenance
101 H.V. Stator 109 Shaft-seal sleeve 110 Shaft-seal carrier
* Included in the clean and overhaul kit: see
Table 5
†Included in the Blade Kit: see Table 3 Included for reference only: see key 

© Edwards Limited 2018. All rights reserved. Page 11
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Parts list
A652-01-840 Issue P
Figure 4 - Exploded view of the inlet-valve assembly

A652-01-840 Issue P
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Maintenance kits
A652-01-840 Issue P
3 Maintenance kits
When you maintain this Edwards product, we recommend you use only Edwards maintenance and service kits.
The maintenance kits available for the RV pumps are listed in Table 2 below:
Table 2 - Maintenance kits
Table 2
Cross
Reference Description Item Number
Hydrocarbon PFPE Variants
1 Clean and overhaul kit (standard) A652-01-131 A652-01-131
2 RV3 blade kit A652-01-130 A652-01-130
3 RV5 blade kit A653-01-130 A653-01-130
4 RV8 blade kit A654-01-130 A654-01-130
5 RV12 blade kit A655-01-130 A655-01-130
6 RV3 cartridge kit A652-01-032 A652-09-032
7 RV5 cartridge kit A653-01-032 A653-09-032
8 RV8 cartridge kit A654-01-032 A654-09-032
9 RV12 cartridge kit A655-01-032 A655-09-032
10 Inlet-valve kit A652-01-036 A652-01-036
11 Motor starting relay kit A505-74-000 A505-74-000
12 Outer shaft-seal kit A652-01-134 A652-01-134
13 Rotor sleeve kit A652-01-136 A652-09-136
14*
*As of the end of 2010 the four RV 1-phase motors (used in kits 14, 15, 16 and 17) have been made obsolete
and replaced by two new motors (items 401). These are supplied in kits 22 and 23.
RV3/RV5 motor kit (Europe/USA)
50/60 Hz, 250/300 W, 1 phase 110-120/220-240 V A652-99-000 A652-99-000
15*RV8/RV12 motor kit (Europe/USA)
50/60 Hz, 450/550 W, 1 phase 110-120/220-240 V A654-99-000 A654-99-000
16*RV3/RV5 motor kit (Japan)
50/60 Hz, 250/300 W, 1 phase 100/200 V A652-98-000 A652-98-000
17*RV8/RV12 motor kit (Japan)
50/60 Hz, 450/550 W, 1 phase 100/200 V A654-98-000 A654-98-000
18 RV3/RV5 motor kit (Europe/USA/Japan)
50/60 Hz, 250/300 W, 3 phase 200-230/380-460 V A652-97-000 A652-97-000
19 RV8/RV12 motor kit (Europe/USA/Japan)
50/60 Hz, 450/550 W, 3 phase 200-230/380-460 V A654-97-000 A654-97-000
20 Oil pump kit RV3/RV5/RV8/RV12 A652-01-805 A652-01-805
21 Clean and overhaul kit (Nitrile) A652-01-137
22 RV3/RV5/RV8 and RV12 Motor kit (Europe/USA) 50/60 Hz,
450/550 W, 1-phase 220-240/ 230-240 V A652-99-500 A652-99-500
23 RV3/RV5/RV8 and RV12 Motor kit (Japan) 50/60 Hz, 450/
550 W, 1-phase 100-200/ 200-210 V A652-98-500 A652-98-500
24 RV voltage switch kit NXC7-56-001 NXC7-56-001
25 RV 3-phase voltage switch set A210-01-981 A210-01-981
26 Voltage label-200V-small pk 10 A200-02-776 A200-02-776

A652-01-840 Issue P
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Maintenance kits
3.1 Unpack and inspect
Remove all the packing materials and protective covers and check the components of the kit.
If any component is damaged, notify your supplier and the carrier in writing within three days; state the Item Number
of the kit together with your order number and the supplier's invoice number. Retain the packing materials for
inspection. Do not use the kit if it is damaged.
Check that your kit contains the components listed in Table 3, 4or 5as appropriate. Note that the clean and overhaul
kit components are packed in three separate bags, labelled bag 1, 2 and 3; the contents of the bags are shown in
Table 5. If any component is missing, notify your supplier in writing within three days.
If the kit is not to be used immediately, replace the protective covers and repack the components of the kit in the
packing materials. Store the kit in cool, dry conditions until required for use.
Table 3 - Checklist of blade kit components
Qty Description Figure 3
reference Check ()
1 Oil-pump blade 115 
2 H.V blade 116 
3 L.V blade 117 
Table 4 - Checklist of inlet-valve kit components
Qty Description Figure 3
reference Check ()
1 Inlet-valve assembly (assembled); this comprises of the following
components (shown in Figure 4): 202 
Valve cover 202-1
Piston 202-2
Valve pad 202-3
Bush 202-4
'U' seal 202-5
O-ring: 49.5 x 3.0, nitrile 202-6
O-ring: 7.6 x 2.4, viton 202-7
O-ring: 32.5 x 3.0, nitrile 202-8
1 Spring (inlet-valve) 213 
1 Printed gasket (top-plate) 216 

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Maintenance kits
A652-01-840 Issue P
Table 5 - Checklist of clean and overhaul kit components
Bag
Label Qty Description Figure 1 to 3 reference Check ()
Bag 1 1 Shaft-seal spacer C 
1 Air bleed assembly 201 
1 Reed valve 111 
1 Oldham coupling (L.V. Oil pump) 119 
1 Printed gasket (seal carrier) 120 
1 Shaft-seal (inner)*123 
1 Shaft-seal (outer)*124 
1 Gas ballast check-valve 210 
2 Spring (dump valve and gas ballast check-valve) 211 
1 Printed gasket (cartridge) 215 
1 Dump valve*217 
1 Oil pressure valve 209 
1 O-ring: 57.6 x 2.4 (cartridge/adaptor)*127 
1 Coupling element 411 
Bag 2 1 Inlet valve 'U' sea *202-5 
1 O-ring: 49.5 x 3.0, nitrile (inlet valve) 202-6 
1 O-ring: 7.6 x 2.4 (inlet valve)*202-7 
1 O-ring: 32.5 x 3.0 (inlet valve) 202-8 
1 Spring (inlet valve) 213 
1 Printed gasket (top-plate) 216 
Bag 3 1 O-ring: 42.5 x 3.0, nitrile (inlet connection)†005 
1 O-ring: 14.6 x 2.4, nitrile (gas ballast control) 203-3 
1 O-ring: 9.6 x 2.4 (mode selector) 204-3 
1 Spring (gas ballast control) 212 
2 O-rings: 21.5 x 3.0, nitrile (gas ballast insert and mode
selector) 220 
1 Exhaust diaphragm*301-3 
1 Printed gasket (oil-box) 314 
3 O-rings: 28.2 x 3.53, nitrile (oil filler-plugs and Exhaust-
flange) 319 
1 O-ring: 69.5 x 3.0, nitrile (sight glass) 321 
1 O-ring: 15.6 x 2.4, nitrile (oil drain plug) 323 
1 O-ring: 21.5 x 3.0, nitrile (gas ballast control) 203-4 
1 Shoulder washer 222 
1 Inlet-valve pad‡202-3 
*The components (or elastomer parts of these components) will be made from viton in the standard clean
and overhaul kit and from nitrile in the Nitrile clean and overhaul kit.
†If required.
‡Only supplied in the clean and overhaul kit (Nitrile).

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 4which 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.