HydraMaster RX20 NEXTGEN 120 VAC User manual

RX-20 Rotary Extractor
Owner’s Manual
Models 700-041-006 and 700-041-007
HydraMaster
11015 47th Avenue West
Mukilteo, Washington 98275
MAN-33272 Rev. 5, August 23, 2013
(000-182-006)
No part of this manual may be reproduced or used in any form or by any means (i.e. graphic, electronic, photocopying or electronic
retrieval systems) without the express written permission of HydraMaster. Specications and information in this document are
subject to change without prior notice. All rights reserved. © 2013 HydraMaster
DOMESTIC AND INTERNATIONAL

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i - RX-20 / CMX-20 Owner’s Manual
RX-20
i - RX-20 Owner’s Manual
Table of Contents
INTRODUCTION..........................................................................................SECTION 1
Contact Information................................................................................. 1-2
Warnings, Cautions and Notices............................................................. 1-3
MACHINE SPECIFICATIONS......................................................................SECTION 2
Congurations.........................................................................................2-2
ASSEMBLY INSTRUCTIONS...................................................................... SECTION 3
OPERATING INSTRUCTIONS.....................................................................SECTION 4
Preparation..............................................................................................4-1
Operation ................................................................................................4-2
CLEANING INFORMATION.........................................................................SECTION 5
Cleaning Patterns....................................................................................5-1
Special Information .................................................................................5-2
Cleaning Hints.........................................................................................5-2
MACHINE MAINTENANCE..........................................................................SECTION 6
Daily Maintenance...................................................................................6-1
Periodic Maintenance..............................................................................6-4
Transport and/or Storage........................................................................6-5
Freeze Warning and Protection ..............................................................6-5
ELECTRICAL DIAGRAMS...........................................................................SECTION 7

RX-20 / CMX-20 Owner’s Manual - ii
RX-20
RX-20 Owner’s Manual - ii
ASSEMBLY DRAWINGSAND PARTS LISTS.............................................. SECTION 8
Final Assembly Parts List (120V) ...........................................................8-3
Final Assembly Parts List (230V)............................................................ 8-5
Final Assembly OS Parts List (230V)......................................................8-7
Base and Drive TrainAssembly Parts List .............................................8-9
Base and Drive TrainAssembly Parts List (230V) .................................. 8-11
Upper and Lower Handle Assembly Parts List (120V) ...........................8-14
Upper and Lower Handle Assembly Parts List (230V) ...........................8-17
Vacuum Head Assembly Parts List.........................................................8-19
Vacuum Head Assembly OS Parts List................................................... 8-21
Handle Locking Linkage Assembly Parts List ........................................8-22
Gear Box Assembly Parts List ................................................................8-23
Vacuum Shoe and Skid Assembly Parts List .......................................... 8-24
Vacuum Shoe and Cast Skid Assembly Parts List.................................. 8-25
Vacuum Head Assembly OS Parts List................................................... 8-27
Vacuum Shoe and Skid Assembly OS Parts List....................................8-28
Solution Valve Assembly Parts List......................................................... 8-29
Valve Stem Assembly Parts List..............................................................8-30
REPAIR AND REPLACEMENT....................................................................SECTION 9
Felt Vacuum Seal ...................................................................................9-1
High Pressure Valve Assembly ..............................................................9-2
TROUBLESHOOTING .................................................................................SECTION 10
WARRANTY INFORMATION.......................................................................SECTION 11

iii - RX-20 / CMX-20 Owner’s Manual
RX-20
iii - RX-20 Owner’s Manual
List of Figures
Figure 2-1. RX-20 Optional Equipment ....................................................................... 2-3
Figure 3-1. Fully Assembled RX-20............................................................................. 3-1
Figure 4-1. (1) Pull or Push on Adjustment Lever; (2) Location of 440 Male Quick
Connect; (3) Vacuum Hose Inlet ............................................................... 4-1
Figure 4-2. Location of Control Triggers and Momentary Switch
as Viewed from Front of Machine (Opposite of Operator’s Position)........ 4-2
Figure 4-3. Lift or Lower Handle to Maneuver; Illustration to the
Right Shows Incorrect Maneuver.............................................................. 4-3
Figure 4-4. Correct Cleaning Patterns......................................................................... 4-4
Figure 5-1. Clean into Area or Room........................................................................... 5-2
Figure 6-1. Remove Nut/Inline Filter............................................................................ 6-1
Figure 6-2. Check Jet Spray for Even Flow................................................................. 6-2
Figure 6-3. Loosen Cleaning Head Assembly............................................................. 6-2
Figure 6-4. Location of Rotary Union........................................................................... 6-2
Figure 6-5. Clean Off Debris from Gear Box Shaft...................................................... 6-3
Figure 6-6. Lubricate Vacuum Seal on Top of Hub...................................................... 6-3
Figure 6-7. Lubricate Shaft and Re-install Head Assembly......................................... 6-3
Figure 6-8. Remove Retaining Clip with Screwdriver.................................................. 6-4
Figure 6-9. Tighten Setscrew....................................................................................... 6-4
Figure 7-1. Wiring Diagram - 120 V, 60 Hz.................................................................. 7-1
Figure 7-2. Wiring Diagram - 230 V, 50 Hz.................................................................. 7-2
Figure 8-1. Final Assembly (120V).............................................................................. 8-2
Figure 8-2. Final Assembly (230V).............................................................................. 8-4
Figure 8-3. Final Assembly OS (230V)........................................................................ 8-6
Figure 8-4. Base and Drive TrainAssembly (120V) - View 1 of 2 ............................... 8-8
Figure 8-5. Base and Drive TrainAssembly (120V) - View 2 of 2 ............................... 8-9
Figure 8-6. Base and Drive TrainAssembly (230V) - View 1 of 2 ............................. 8-10
Figure 8-7. Base and Drive TrainAssembly (230V) - View 2 of 2 ..............................8-11
Figure 8-8. Upper and Lower Handle Assembly (120V) - View 1 of 2....................... 8-12
Figure 8-9. Upper and Lower Handle Assembly (120V) - View 2 of 2....................... 8-13

RX-20 / CMX-20 Owner’s Manual - iv
RX-20
RX-20 Owner’s Manual - iv
Figure 8-10. Upper and Lower Handle Assembly (230V) - View 1 of 2..................... 8-15
Figure 8-11. Upper and Lower Handle Assembly (230V) - View 2 of 2..................... 8-16
Figure 8-12. Vacuum Head Assembly....................................................................... 8-18
Figure 8-13. Vacuum Head Assembly OS................................................................. 8-20
Figure 8-14. Handle Locking Linkage Assembly ....................................................... 8-22
Figure 8-15. Gear Box............................................................................................... 8-23
Figure 8-16. Vacuum Shoe and Skid Assembly ........................................................ 8-24
Figure 8-17. Vacuum Shoe and Skid Assembly OS ................................................. 8-25
Figure 8-18. Solution Valve Assembly....................................................................... 8-26
Figure 8-19. Valve Stem Assembly............................................................................ 8-27
Figure 9-1. Carefully Pry Seal Up and Lift Out............................................................ 9-1
Figure 9-2. Quick Connect, Back Plate and Stainless Steel Hose
Removed from Upper Handle Assembly................................................... 9-2

1-1: Introduction
RX-20
1- Introduction
Congratulations,
You now own a piece of equipment that incorporates the latest in carpet, tile and grout
cleaning technology. Your foresight in purchasing an RX-20 shows that you care enough
to give your customer the maximum cleaning process available. You have invested in
not only a cleaning tool, but a marketing tool
that will enhance your professional image in
every way.
The RX-20’s features will almost certainly
increase your productivity while decreasing
the fatigue factor that may have prevented
you from going after some of the larger
cleaning jobs that are available to carpet
cleaners and maintenance professionals
today.
Your new RX-20 is a powerful Rotary Jet
Extractorthathasbeenprecisionengineered
to bring you to the state-of-the-art in carpet, tile and grout cleaning. The RX-20’s weight
distribution and rotary motion enable the operator to maneuver the unit easily with less
fatigue and without back strain.
The RX-20’s electric motor drives its precision transmission which, in turn, rotates the
head, or star, assembly. Cleaning solution is injected through the center of the
gear box shaft directly to the three spray jets.
Soiled solution is then extracted from the carpet by ve
stainless steel cleaning heads and drawn through the
aluminum exhaust manifold to your cleaning system’s
recovery tank.
The RX-20 is available in either the 120 V 60 Hz
version or the 230 V 50Hz/60Hz versions. Photos
and illustrations throughout this manual show only
the RX-20 120 V version due to space limitations.

Introduction: 1-2
RX-20
CONTACT INFORMATION
If you have any questions regarding the operation, maintenance or repair of this machine,
refer to the following information and contact the appropriate HydraMaster department.
Hours Telephone Numbers E-mail Addresses
Monday-Friday [phone] Support Tech Support:
[e-mail]
7:00 a.m. to 5:00
p.m. [phone] Parts Parts Support: [e-mail]
Pacic Time
FAX
[phone] - Parts
[phone] - Support
When calling your distributor, be sure to reference the serial number and date of
purchase.
FOR YOUR REFERENCE:
Serial No.____________________________________________________
Date of Purchase:_____________________________________________
Purchased From (Distributor): __________________________________

1-3: Introduction
RX-20
WARNINGS, CAUTIONS AND NOTICES
HydraMaster uses this WARNING symbol throughout the manual to warn of
possible injury or death.
This CAUTION symbol is used to warn of possible equipment damage.
This NOTICE symbol indicates that federal or state regulatory laws may apply,
and also emphasizes supplemental information.

Introduction: 1-4
RX-20
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2-1: Machine Specications
RX-20
2- Machine Specications
RX-20 - 120 V RX-20 - 230 V
Length 23” 23”
Base Width 16” 16”
Height - Standard Up to 43” Up to 43”
Weight 70 lbs 70 lbs
Motor 1/2 HP Totally Enclosed
Fan-Cooled 1/2 HP Totally Enclosed, Fan-Cooled
Voltage 120 V, 60 Hz 230 V, 50 Hz or 60 Hz
Gear Box
1,725 rpm Input
130 rpm Output
Permanently Lubricated
Helical Gear Drive
230 V, 50 Hz 230 V, 60 Hz
1,450 rpm
Input
109 rpm Output
Permanently
Lubricated
Helical Gear
Drive
1,725 rpm
Input
130 rpm Output
Permanently
Lubricated
Helical Gear
Drive
Oil Capacity 12 oz 12 oz
Star Head Plate Replaceable, Spring Steel
Arms Replaceable, Spring Steel Arms
Cleaning Heads Five Cast Aluminum Five Cast Aluminum
Solution Jets Three Stainless Steel, 80015
Veejet 80 Three Stainless Steel, 80015 Veejet 80
Solution Strainer Mesh, Stainless Mesh, Stainless
Solution Valve Stainless Steel,
High Pressure Stainless Steel, High Pressure
Cleaning Rate Five Heads Rotating at 130 rpm = 650 Cleaning
Passes/Minute
230 V, 50 Hz 230 V, 60 Hz
Five Heads
Rotating at
109 rpm = 545
Cleaning
Passes/Minute
Five Heads
Rotating at
130 rpm = 650
Cleaning
Passes/Minute

Machine Specications: 2-2
RX-20
RX-20 - 120 V RX-20 - 230 V
Handle Assembly Foam Grips Foam Grips
Transportation
Wheels 8” diameter, 1-1/2” Wide; Gray, Non-Marking 8” diameter, 1-1/2” Wide; Gray, Non-Marking
Electric Cord 50 ft, 14/3 50 ft w/M-F IEC Ends 230 V
The base, exhaust manifolds, handle, gear box housing and cleaning heads are all cast
aluminum. Other parts are either metal or high impact plastic.
The operating temperature and pressure of the cleaning solution as well as the
vacuum power depend entirely on the type of cleaning system you use.
CONFIGURATIONS
When selecting your high efciency rotary extractor machine, you have these models
from which to choose:
If you want this conguration: Order this P/N:
RX-20 - 120 V 700-041-006
RX-20 - 230 V 700-041-007
See for detailed parts lists for all congurations.

2-3: Machine Specications
RX-20
OPTIONAL EQUIPMENT
To better meet your business needs, HydraMaster offers these options that you can add
to your basic rotary extractor system:
If you want this
option: Order this P/N:
Pad and Bonnet
Driver 190-041-020 (Top Photo,
Figure 2-1)
Hard Floor
Attachment (LD) 190-041-024 (Middle Photo,
Figure 2-1)
Hard Floor
Attachment (MD) 190-041-026 (Middle Photo,
Figure 2-1)
Hard Floor
Attachment (HD) 190-041-025 (Middle Photo,
Figure 2-1)
Mounting
Bracket 000-163-018 (Bottom Photo,
Figure 2-1)
Figure 2-1. RX-20 Optional Equipment

Machine Specications: 2-4
RX-20
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3-1: Assembly Instructions
RX-20
3 - Assembly Instructions
To prepare your RX-20 for use, follow these instructions:
1. Remove the machine from the packaging. Inspect the machine carefully for any
damage that may have occurred during shipping.
2. Remove the solid shipping plug from the top of the gear box (see Figure 3-1).
3. Check the gear box lubricant level (see page 6-4 of this Owner’s Manual).
4. Insert the vented plug (provided) into the gear box in place of the solid shipping plug.
The solid shipping plug may be discarded.
5. Remove the protective wrapping material from the wheels.
6. Attach the cleaning head, or star, assembly to the base of the RX-20 (see
Figure 3-1).
a. Lean the machine back and rest it on the handle.
b. Thread the star assembly (cleaning head) onto the exposed shaft in a
counterclockwise direction.
Be sure to remove the solid shipping plug from the top of the gear box and
replace it with the vented plug (P/N 000-106-014), provided, before operating the
machine (see Figure 3-1). Failure to follow these directions may result in damage
to the gear box and seal.
Your RX-20 is now ready to operate.
Figure 3-1. Fully Assembled RX-20
Head, or Star, Assembly
Shipping Plug
Base

Assembly Instructions: 3-2
RX-20
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4-1: Operating Instructions
RX-20
4 - Operating Instructions
PREPARATION
Operating instructions presented in this section
apply to both the 120 V and 230 V versions of
the RX-20. However, photos and illustrations
show only the 120 V version due to space
limitations.
Handle Adjustment
Pull or push on the adjustment lever to adjust the
height of the handles (see Figure 4-1). Several
adjustments may be needed before a desirable
operating position is found.
Most operators have better control and
experience less fatigue when the handle is in a lower position, at the operator’s
hip line. For each person, there is an ideal position which ensures the RX-20
does the work instead of the individual.
Solution and Vacuum Hose Connections
Your RX-20 is equipped with a 440 male quick connect for the solution hose connection
and a 2” O.D. vacuum hose inlet (see Figure 4-1). The vacuum inlet requires a 2” I.D.
vacuum hose for proper air ow with a truckmounted system.
The vacuum hose must be in good condition to ensure maximum airow.
A solution hose with a 440 female quick connect is also required. If you do not
have a 440 female quick connect, please call your distributor to order the part.
Figure 4-1. (1) Pull or Push on
Adjustment Lever; (2) Location
of 440 Male Quick Connect;
(3) Vacuum Hose Inlet (120 V
Version Shown)
1
2
3

Operating Instructions: 4-2
RX-20
Electrical Cord Connection
The 50 ft electrical cord on your RX-20 (120 V/60 Hz conguration) is a permanently
attached, three-prong grounded line requiring a three-prong, 15 Amp receptacle.
A three-prong to two-prong adapter may be used if its ground wire is properly attached
to a grounded terminal.
Do not, under any circumstances, remove the ground prong from your RX-20
power cord. Serious injury or death may result.
For best results, vacuum the carpet thoroughly prior to using the carpet cleaning
system.
OPERATION
Control Functions
Control triggers are located on each side of the handle under the rubber hand grips (see
Figure 4-2).
1. To operate the RX-20, squeeze the motor trigger on your right-hand side to control
the electric motor which drives the cleaning heads (see Figure 4-2).
Figure 4-2. Location of Control Triggers and Momentary Switch as Viewed from
Front of Machine (Opposite of Operator’s Position)
Motor Trigger on OPERATOR’s
Right-Hand Side
Solution Trigger on OPERATOR’S
Left-Hand Side
Momentary Switch

4-3: Operating Instructions
RX-20
2. To fully engage the motor as you are cleaning, you also need to hold down the
momentary switch, or button, at the same time as you squeeze the motor trigger
(see Figure 4-2). The momentary switch is an integrated safety feature on the RX-20
which cuts power to the machine if the operator’s hands leave the machine for any
reason.
3. On the left-hand side, squeeze the solution trigger to control the high pressure
solution spray (see Figure 4-2).
Notice that the air ows constantly while the RX-20 is in operation.
Do not operate your RX-20 on dry carpets The friction generated by the revolving
cleaning heads may damage bers in the carpet.
Maneuvering Your RX-20
Your RX-20 maneuvers like a rotary oor machine.
1. To move the RX-20 to the right, lift the handle slightly (see Figure 4-3). The more
you lift or lower the handle, the faster the RX-20 will move.
Figure 4-3. Lift or Lower Handle to Maneuver; Illustration to the Right
Shows Incorrect Maneuver

Operating Instructions: 4-4
RX-20
2. To move forward and backward, position the handle so that the unit remains
stationary, then push forward or pull back. To familiarize yourself with your RX-20,
practice on an open area. Depress both the solution trigger and motor trigger and
move the RX-20 slowly in a 3 to 5-ft arc, as shown in Figure 4-4.
After you have become familiar with the speed and movement of the machine, practice
making it hover in one spot. (The hovering maneuver is useful for removing stubborn
stains, as well as removing furniture indentions.)
Do not tilt RX-20 sideways while moving forward and backward. A loss of control
may result in damage to the unit or cleaning area.
To view an online demo, access this website:
http://www.youtube.com/watch?v=wY236ahDIow&feature
To access the online demowith your smartphoneor other smart
device, scan the QR code to the right.
Figure 4-4. Correct Cleaning Patterns