HYDRAMASTER RX-20, CMX-20 User Manual

11015 47th Avenue W, Mukilteo, WA 98275

RX-20 / CMX-20

Table of Contents Page

Introduction ........................... 1

Machine Specifications ................... 2

Assembly Instructions .................... 3

Operation ............................. 4

Cleaning Information ..................... 6

Machine Maintenance .................... 8

Machine Parts .........................11

Repair ...............................21

Troubleshooting ........................22

Limited Warranty Plan ....................24

Machine Serial Number _______________________

Copyright © 1998

HYDRAMASTER© Corporation

Mukilteo, Washington

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 the HYDRAMASTER© Corporation. All rights reserved.

Revised September 10, 1998

RX-20 / CMX-20 Page 1

Congratulations!((!((

You now own a piece of equipment
that incorporates the latest in carpet
cleaning technology. The RX-20's
features will almost certainly increase
the productivity of you and your
business, while decreasing the fatigue
factor that may have prevented you
from going after some of the large
cleaning jobs that are available to
carpet cleaners and maintenance
professionals today. With competition
as strong as it is in most communities,
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 is
REVOLUTIONARY. Your foresight in
purchasing this ultimate "cleaning
machine" will be rewarded with the
knowledge that you care enough to
give your customer the maximum
cleaning process available.

The RX-20's weight distribution and
rotary motion enable the technician 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 star assembly. Cleaning
solution is injected through the center
of the gearbox shaft directly to the five
spray jets. Soiled solution is then
extracted from the carpet by five
cleaning heads and drawn through the
aluminum exhaust manifold to your
cleaning system's recovery tank.
NOTE: The operating temperature and
pressure of the cleaning solution as
well as the vacuum power depends
entirely on the type of cleaning system
you use.

Using the RX-20 in your business will
turn you into a professional carpet
cleaning operator, rather than a
professional laborer.

Once again, congratulations to another
cleaning professional who will not wait
for tomorrow, and will not have to
compete against the RX-20. The
competition will have to try and
compete with you!

An Evolution

That Had To Happen

Your new RX-20 has been precision
engineered to bring you to the state-of­the-art in carpet cleaning. In the past,
a wand technician had to supply all the
pressure and motion to do the cleaning.

Construction

The base, exhaust manifolds, handle,
gearbox housing and cleaning heads
are all cast or molded aluminum. Other
parts are either metal or high impact
plastic.

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Page 2 RX-20 / CMX-20

Machine Specifications

RX-20 HIGH SPEED RX-20

CMX-20 HIGH SPEED CMX-20

Length: 27" 23"

Base Width: 15" 15"

Height: 45" 43"

Weight: 75 lbs. 70 lbs.

Motor: 115 V, ¾ HP 115 V, ½ HP TEFC

Gearbox: 1725 RPM Input 1725 RPM Input

90 RPM Output 130 RPM Output

Permanently Lubricated

Helical Gear Drive

Oil Capacity: 14 oz. 14 oz.

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RX-20 / CMX-20 Page 3

Assembly Instructions

To prepare your machine for use, If you purchased a High Speed RX-20,
follow these instructions: it may require assembling if it was
a) Remove the machine from the shipped in two separate boxes.

packaging. Inspect the machine
carefully for any damage that may To assemble:
have occurred during shipping. If a) With the three bolts provided,
any oil spillage is noted be sure to attach the handle to the base using
check the gearbox lubricant level a 9/16" wrench (see illustration to
(see instructions). right).

b) Now attach the star assembly to b) Next attach the stainless steel hose

the base. Lean the machine back to the rotary union using 7/16" and
and rest it on the handle. Thread 1/2 " wrenches.
the star assembly onto the exposed c) Next attach the 2" vacuum hose to
shaft remembering to go in a the base and handle using the hose
counter-clockwise direction. clamps provided.

c) Important: Remove the solid d) Next plug the male and female

shipping plug from the top of the electrical connections together.
gearbox and replace it with the
vented plug provided before
operating the machine.

Your machine is now ready to

operate.

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Page 4 RX-20 / CMX-20

Operation

Preparation

1. Handle Adjustment: Loosen the
adjustment knob located below the
RX-20 label (turn counter­clockwise to loosen, clockwise to
tighten). Adjust the handle to a
comfortable height. Several
adjustments may be needed before
a desirable operating position is
found.
NOTE: Most technicians have
found better control and less
fatigue when the handle is in a low
position just around the hip line.
There is an ideal position for each
person which will ensure the RX-20
will do the work instead of you.

quick connect is required. The
vacuum inlet requires a two inch ID
vacuum hose for proper air flow
with a truck mounted system.
IMPORTANT: The vacuum hose
must be in good condition to
ensure maximum airflow. If you do
not have a 440 female quick
connect and can not find it locally,
it can be ordered from the
HydraMaster Parts Department.
Call [phone] and request
part # 052-051 (440 QC).

3a. Electrical Cord Hook Up (Regular

RX-20): The 50 foot electrical cord
on your RX-20 is a detachable
three-prong grounded line requiring
a three-prong, 15 amp receptacle.
A three-prong to two-prong
adapter may be used, providing its
ground wire is properly attached to
a grounded terminal.

CAUTION: Do not, under any
circumstances, remove the ground
prong from your RX-20 power
cord. Serious injury or death may
result.

To connect the power cord to the
unit, insert the male twist-lock plug
(from the unit) into the female end
(on the power cord) and twist until
they are securely locked together.

2. Solution and Vacuum Hose
Hookups: Your RX-20 is equipped
with 440 male quick connect for
the solution hose hookup and a
two inch OD vacuum hose inlet
(refer to the above illustration). A
solution hose with a 440 female

3b. Electrical Cord Hook Up

(High Speed RX-20): The
50 foot electrical cord on
your RX-20 is a
permanently attached,
three-prong grounded line
requiring a three-prong,
15 amp receptacle. A

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RX-20 / CMX-20 Page 5

three-prong to two-prong To move forward and backward,
adapter may be used position the handle so that the unit
providing its ground wire remains stationary, then push
is properly attached to a forward or pull back.
grounded terminal.

CAUTION: Do not, under any To familiarize yourself
circumstances, remove the ground with your RX-20,
prong from your RX-20 power practice on an open
cord. Serious injury or death may carpeted area. Depress
result. both the solution trigger

and motor trigger and
move the RX-20 slowly

Operating Instructions

4. Control Functions: There are
control triggers located on each
side of the handle under the rubber
hand grips. As you operate the
RX-20, the trigger on your right
hand side controls the electric
motor that drives the cleaning
heads. On the left hand side, the
trigger controls the high pressure
solution spray. The air flows
constantly while the RX-20 is in
operation.

in a three to five foot
arc, as shown in the
cleaning patterns on the
following page.
CAUTION: Do not
operate your RX-20 on
dry carpets. The
friction generated by
the revolving cleaning heads may
damage fibers in the carpet.

Once 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
indentations.)

Do not tilt machine sideways while
moving forward and backward. A loss
of control may result in damage to the
unit or location.

5. Maneuvering Your RX-20: Your
RX-20 maneuvers like a rotary floor
machine. To move the RX-20 to
the right, lift the handle slightly.
To move it to the left, push down
on the handle slightly. The more
you lift or lower the handle, the
faster the RX-20 will move.

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Page 6 RX-20 / CMX-20

Cleaning Information

Cleaning Patterns

For regular carpet
cleaning, use an
overlapping arc pattern
three times over the
same area (two passes
with solution and one
pass for drying). When
cleaning carpets, first
clean in a circular
pattern, then use the
overlapping arc pattern
to dry the area.
(NOTE: Dirtiest areas
may require two or
more cleaning passes.)
Using either pattern,
you should develop a
comfortable rhythm. To
obtain maximum
performance from your
RX-20, move it slowly and deliberately During the cleaning of some plush
with a 50% overlap, giving it time to carpets you may notice a "pilling"
clean and extract. (Unlike a manual effect. With an RX-20, loose yarns
wand, the RX-20 is doing the work you form balls and are kicked aside as the
had to do in the past.) A steady pace cleaning heads revolve. This is normal
rather than a frenzied one will increase when aggressive cleaning or even
efficiency and production and decrease normal vacuuming takes place, as
fatigue. evidenced by a number of dead, loose

Arc

Circular

The Following Cautions Should
Be Observed While Cleaning:

1. DO NOT operate your RX-20 over
metal floor moldings. Damage to
both the molding and the cleaning
head will result.

hardwood floors.

3. DO NOT operate your RX-20 over
loose or unraveled carpet seams.
The cleaning head may catch and
cause further damage.

4. DO NOT operate your RX-20 on
concrete floors. It will develop
sharp edges on the extraction
heads that will damage carpet
fibers.

5. DO NOT clean over the edge of a
loose carpet. Instead, clean only
up to the edge. Damage may
occur should the extraction heads
catch the loose carpet.

Special Information

yarns in the vacuum cleaner bag.
These loose yarns, in most cases, are
short staple yarns or filler yarns used to
give the carpet a denser appearance.
Because your RX-20 weighs
approximately 90 pounds and rests on
five four-inch cleaning heads, the yarns
are not sucked up into the vacuum
heads as they are with a vacuum
cleaner or old-style cleaning wand.

2. DO NOT operate your RX-20 on

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RX-20 / CMX-20 Page 7

CAUTION: On older, rubber backed, The RX-20 has been very successful in
glued down carpets that may be de- restoring badly matted traffic lanes in
laminating with age, the RX-20 may front of doorways and sofas. Even
cause further de-lamination. When in pivot areas can be brought back to life
doubt, DO NOT use your RX-20. again, in most cases. "Cornrowing" in

hallways can also be eliminated with
minimal effort.

Cleaning Hints

A. Most cleaners customarily clean

their way out of an area or room.
With the RX-20, it is possible to
clean into an area or room, as
shown in the illustrations below, so
that the hoses are dragged behind
you during the cleaning process
rather than kicked out of the way
as you back out of an area. The
"cleaning into" method works
especially well in hallways or
confined areas.

B.

The RX-20 is a very aggressive
carpet cleaning power head and
will leave the carpet with a freshly­cleaned appearance. The carpet
should be brushed or groomed
after the cleaning process to
remove any swirl marks left
behind.

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Page 8 RX-20 / CMX-20

Machine Maintenance

Good care and regular maintenance of necessary.
your RX-20 will result in a long,
dependable life for the unit. Keep in 4. Remove the in-line solution filter
mind that your RX-20 will be in full screen by unscrewing the 7/8 inch
view of your customer. An RX-20 that hex nut protruding from the back
is dirty and unkempt in appearance can of the handle. Rinse under water
cause your image to suffer. You are to remove debris. If necessary,
offering your customer the latest in use a toothbrush to remove
cleaning technology. Therefore, it is stubborn particles.
important that your company image
reflect your desire to give your
customer THE BEST.

The surface finish on your RX-20 is a
durable, baked on epoxy coating and is
easily cleaned with a damp cloth. To
further protect the finish, a light coat of
good silicon base polish should be
applied periodically.

Lubrication and maintenance play a key
role in the life of your RX-20. Hence,
the following daily and periodic
maintenance steps must be followed.
Train yourself to maintain your unit on
a regular schedule until it becomes
habitual.

Daily Maintenance

1. Inspect the power cord for cuts,
breaks, etc. Repair as needed.

2. Inspect the vacuum hoses for
breaks or tears. Repair or replace
as necessary.

3. Visually inspect your RX-20 for
water leaks, damage to the
cleaning heads, etc. Repair as

5. Check the jet spray for evenness.

An uneven spray will cause
improper flow of the cleaning
solution.

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RX-20 / CMX-20 Page 9

6. Remove the 8. Lubricate the felt vacuum seal on
cleaning top of the hub with a quality, 30
head. It weight SAE motor oil. Also, put a
unscrews in few drops into the hub threads.
the same
direction it
turns during
operation (or
clockwise
when looking
at it from the underside). Once
you have loosened the assembly,
spin it off with your hands. If the
cleaning head is difficult to remove,
you may use a ¾ inch socket
wrench on the exposed center nut.
To prevent the gearbox from 9. Coat the shaft with Pennz-Guard or
turning, the output shaft will a similar lubricant. Reinstall the
accept a e inch wrench just below vacuum head assembly onto the
the rotary union. Wash the shaft by rotating it counter­cleaning heads and shroud clockwise.
assembly with a garden hose,
being careful not to wet the
electric motor assembly. Clean any
lint build-up from the cleaning
heads and vacuum hoses (lint
build-up will restrict proper airflow
and prolong drying time).

ËË CAUTION ËË

7. Clean off any debris that may have IMPORTANT: While rotating the
accumulated on the gearbox shaft vacuum head assembly in the
or the inside threaded bore of the counter-clockwise position, make
hub. An accumulation of debris sure that it spins freely all the way
here, if not removed, may damage down. If it begins to require the
the gearbox oil seal. This will slightest finger tip pressure,
result in loss of oil in the gearbox. unscrew it and brush off the
If the gearbox is operated without threads. All it takes is the slightest
oil, severe damage may occur. grain of dirt or sand to obstruct the

threads. If you turn too far onto a
grain of dirt, the hub may become
locked onto the shaft of the
gearbox.

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Page 10 RX-20 / CMX-20

Periodic Maintenance Transport And/Or Storage

Regular RX-20 only: Whenever your RX-20 is transported or

Check the oil in the gearbox. The stored, it is recommended that the
unit must be on a level surface to cleaning head be removed. The
get an accurate reading. Change machine will then sit flat on the floor
the oil in the gearbox every 100 and remain more stable, especially
hours. Use 80-90 weight gear oil during transport.
to reduce friction and allow the
gearbox to run at a cooler
temperature. With the unit level,
drain the oil. Next fill the gearbox
with new oil at the oil port on the
front until it dribbles out of the
inspection port.
NOTE: Normal wear and tear on
your new gearbox will cause small
amounts of metal splinters to rub
loose during the first 10 hours of
use. Therefore, we recommend
that you change the oil after 10
hours, and after that every 100
hours.

High speed RX-20:

Check the oil the gearbox. Check
the oil level in the gearbox on a
monthly basis. This is a
permanently lubricated gearbox.
You do not need to change the oil.
However, maintaining the proper oil
level is important. To check the oil
level, remove the vent plug and
look into the gearbox. Turn the
star until you can see the
inspection hole in the gear. With
the RX-20 sitting flat on a table or
the floor, the oil level should be up
to, but not above, the middle of
the gear. If oil needs to be added,
use a quality 80-90 weight gear oil.
NOTE: When checking the oil level
in the gearbox, you can use a
toothpick as a dip stick. The oil
level should read dth of an inch.

Freeze Warning And Protection

Your RX-20 can sustain damage from
freezing, as can any equipment that
functions with the use of water. Care
must be taken to protect this tool from
freezing just as you do your other
equipment. To protect it from freezing,
simply blow air from a gas station air
hose through the solution quick
connect with the valve open. This will
blow all water from the valve, solution
line, rotary union and jet assembly.
Open and close the valve several times
to ensure that all water is removed.

Parts And Assemblies

HydraMaster has every part in stock.
For parts ordering or servicing call:

Parts Department at [phone] or
Service Department at [phone]

Check for a registered HydraMaster
Service Center in your area.

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RX-20 / CMX-20 Page 11

Regular Base Assembly

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Page 12 RX-20 / CMX-20

Regular Handle Assembly

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RX-20 / CMX-20 Page 13

TWIST-LOCK PLUG VALVE ASSEMBLY
WIRING DIAGRAM

Item No. 75 Item No. 85

Regular RX-20 Parts List

ITEM PART NO DESCRIPTION QTY

1 000-143-132 Screw, 10-24 x ¾" HHC s/s 2
2 000-081-001 Label, RX-20 Machine (3 pc set) 1
3 000-041-026 Cover, RX-20 Motor 1
4 000-081-001 Label, RX-20 Machine (3 pc set) 1
5 000-052-002 2MA - 2UFS 1
6 000-052-276 Rotary Union, c" NPT 1
7 000-068-175 Hose, Solution Valve to Rotary Union 1
8 000-052-296 Nipple, Brass RX Gearbox Extention 1

9 000-106-014 Plug, RX-20 Gearbox Vent 1
10 000-107-091 RX-20 Gearbox 1
11 000-106-001 Plug, c" Brass 1
12 604-052-007 RX-20 Electric Motor Assembly 1
13 000-143-166 Screw, 10-24 x d" BTN HD Cap s/s 14
14 000-052-288 Coupler, c" Machined Rotary Union Fitting 1
15 000-174-049 Washer, 5/16" s/s Flat 3
19 000-143-118 Screw, #8 x ½" HXWSHD SM 2
20 000-015-066 Bracket, RX-20 Hood Wrinkle Black 1
21 000-141-001 Axle, 5½" Skid 1

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Page 14 RX-20 / CMX-20

ITEM PART NO DESCRIPTION QTY

22 000-020-005 Collar, ½" Set 6
23 000-177-002 Wheel, 5" Rubber 4
24 000-107-096 Handle Arc 2
25 000-143-018 Screw, d-16 x 1" HHC 4
26 000-097-009 O-Ring, Cast Gearbox Shaft 1
27 000-154-013 Spacer, 1" RX-20 Gearbox Shaft 1
28 000-068-034 Hose, 2" Black Vacuum 3 Ft
29 000-041-017 Cover, Sight-Side Port 1
30 000-143-164 Screw, 5/16-18 x 2" BTN HD Cap s/s 2
31 000-006-008 Base, RX-20 Side Port 1
32 000-141-010 Axle, RX-20 Front Skid 1
33 000-143-142 Screw, 5/16-18 x ¾" BTN HD Cap s/s 8
34 000-078-108 Kit, Roto Shroud Bumper and Rivet 1
35 000-143-114 Screw, 10-24 x ½" FHM Phillips s/s 4
36 000-107-0221 Hub with Ring, Single Lead Thread 1
37 000-105-008 Plate, Cast RX-20 Base - Seal 1
38 000-057-047 Gasket, RX-20 Felt Hub 1
39 000-052-080 Nipple, c" x 4" Brass 5
40 000-052-089 Elbow, c" Brass Female 5
41 000-076-037 Jet, H cVV 80015 SS - STD 5

Optional: 000-076-052 Jet, 1) 2 Piece Set Twist Out 5

000-076-058 Jet, 1) 2 Piece Brass #8001 5
42 000-143-158 Screw, 5/16-18 x 1¼" HHC s/s 5
43 000-094-009 Nut, ¼-20 s/s Nylock 5
44 000-064-012 Head, New RX Skid Assembly 5
45 000-068-174 Hose, Vac Hub/Skid 5
46 000-143-148 Screw, 5/16-18 x ½" HHCS s/s 5
47 000-107-089 Heat Treated Star, s/s 1
48 000-094-034 Nut, 10-24 s/s Nylock 2
49 000-015-078 Bracket, RX-20 Hood Support Complete 1
50 000-061-001 Handle, Foam Grip 2
51 000-061-016 Handle, RX-20 1
52 000-081-001 Label, RX-20 Machine (3 pc set) 1
53 000-103-014 Pin, c x ¾ Roll 1
54 000-061-015 Knob, Adjusting 1
55 000-141-002 Rod Assembly, RX-20 Handle Adjusting 1

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RX-20 / CMX-20 Page 15

ITEM PART NO DESCRIPTION QTY

60 000-020-004 d" Set Collar 1
62 000-103-015 Pin, 5/32 x 1" Roll 1
63 000-103-012 Pin, ¼ x f "Clevis 4
64 000-107-101 Plunger 2
65 000-094-030 Nut, Adjusting 2
66 000-107-097 Link 1
67 000-139-006 Ring, e" Snap 4
68 000-103-013 Pin, 3/32 x ½" s/s Cotter 2
70 000-162-001 Tie Wrap, 4" Nylon 2
71 000-167-010 Trigger, RX-20 Power 1
72 000-107-103 Trigger, Pivot 1
73 000-157-032 Switch, Micro 1
74 000-143-048 Screw, 6-32 x 1" Pan Head 2
76 000-178-004 Cord, 14/3 x 50' Gray - Power 1
77 000-108-012 Protector, Power Cord Relief Grip 1
78 000-094-021 Wire Nut, Yellow 1
79 000-052-050 Quick Connect, 440 Male with Viton 1
80 000-052-071 Nipple, ¼ Brass Hex 1
81 000-049-033 Filter, ¼" Inline Y 1
82 000-052-301 Elbow, ¼" Male x ¼" Male 1
83 000-094-008 Nut, ¼ - 20 Hex 1
84 000-167-009 Trigger, o/s RX-20 Brass Solution Valve 1
85 000-169-058 Valve, s/s HM Solution 1
86 000-052-001 2M - 2UFS 1
87 000-143-005 Screw, ¼-20 x 1¾" HHC 2
88 000-143-002 Screw, ¼-20 x 1" HHC s/s 1
89 000-041-013 Cover, Handle Access 1
90 000-105-018 Plate, RX-20 Serial ID 1
91 000-140-001 Rivet, AB4 - 3A Pop 2
92 000-143-167 Screw, 10-24 x 1¼" BTN HD s/s 1
93 000-141-009 Rod, RX-20 Handle Pivot 1
94 604-051-003 Internal Wire Harness 1
95 000-052-059 Bushing, ¼M x cF Brass 1

Not Shown:

000-094-036 Nut, ½" NPT Pipe Plastic 1

Used with Item No. 77

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Page 16 RX-20 / CMX-20

High Speed Handle Assembly

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RX-20 / CMX-20 Page 17

High Speed Base Assembly

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Page 18 RX-20 / CMX-20

RX-20 High Speed Parts List

ITEM PART NO DESCRIPTION QTY

1 000-015-066 Bracket, RX-20 Hood Wrinkle Black 1
2 000-015-139 Bracket, Hi Speed RX Handle Brace 1
5 000-068-040 Hose, Base Out - Manifold 1
7 000-139-009 Ring, Snap Ring (E-Clip) x ½" 2
8 000-139-010 Ring, Snap Ring (E-Clip) x 5/16" 4

9 000-141-004 Axle, Hi Speed RX Wheel 1
10 000-141-005 Rod, Hi Speed RX-20 Handle Arc 1
11 000-141-006 Rod Assy, Hi Speed RX Handle Adjusting 1
12 000-020-004 Collar, d" Set 1
13 000-041-013 Cover, Handle Access 1
14 000-052-050 Quick Connect, 440 Male with Viton 1
15 000-052-071 Nipple, ¼ Brass Hex 1
16 000-061-001 Handle, Foam Grip 2
17 000-061-017 Handle, Hi Speed RX-20 1
18 000-081-001 Label, RX-20 Machine (3 pc set) 1
19 000-068-175 Hose, Solution Valve to Rotary Union 1
20 000-094-010 Nut ¼-20 s/s Hex 1
21 000-094-021 Nut, Wire - Yellow 1
22 000-107-096 Handle Arc 2
23 000-107-103 Trigger Pivot 1
24 000-108-012 Protector, Power Cord Relief Grip 1
25 000-108-014 Shield, RX-20 Micro Switch 1
26 000-143-002 Screw, ¼-20 x 1" HHC s/s 3
27 000-143-048 Screw, 6-32 x 1" Rnd HD Mach s/s 2
28 000-143-336 Screw, 10-32 x ¼" s/s Pan Head 1
29 000-157-032 Switch, Micro 1
30 000-167-009 Trigger, o/s RX-20 Brass Solution Valve 1
31 000-167-010 Trigger, RX-20 Power 1
32 000-177-001 Wheel, 8" Hi Speed RX-20 2
33 000-178-004 Cord, 14/3 x 50' Gray - Power 1
34 000-049-033 Filter, d" Inline Y 1
35 000-052-001 2M - 2UFS 1
36 000-052-059 Bushing, ¼ M x c F Brass 1

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RX-20 / CMX-20 Page 19

ITEM PART NO DESCRIPTION QTY

37 000-052-301 Elbow, ¼" Male x ¼" Male 1
38 000-169-058 Valve, s/s HM Solution 1
39 000-094-030 Nut, Adjusting 1
40 000-103-012 Pin, ¼ x f" Clevis 2
41 000-103-013 Pin, 3/32 x ½" s/s Cotter - RX 2
42 000-107-097 Link 4
43 000-107-101 Plunger 2
44 000-139-006 Ring, e" Snap 2
45 000-037-016 Terminal, #10 Ring - 16 AWG 1
46 000-178-039 Cord, 14/3 x 6' Gray 1
47 000-006-009 Base, Hi Speed RX-20 1
48 000-061-027 Handle, RX Express Base - Lift 1
49 000-052-276 Rotary Union, c" NPT 1
50 000-078-108 Kit, Roto Shroud Bumper and Rivet 1
51 000-105-008 Plate, Cast RX-20 Base - Seal 1
52 000-106-014 Plug, RX-20 Gearbox Vent 1
53 000-143-166 Screw, 10-24 x d" s/s BTN HD Cap 2
54 604-052-005 Hi Spd RX-20 Motor/Gearbox Assy 1

54A 604-052-006 Hi Spd RX-20 Elect Motor Assy 1

54B 000-059-001 Gearbox Complete, Spur 1

55 000-041-123 Cover, ½ HP TEFC Motor 1
56 000-143-096 Screw, d 16 x ¾" s/s BTN HD 3
57 000-052-080 Nipple, c" x 4" Brass 5
58 000-052-089 Elbow, c" Brass Female 5
59 000-057-047 Gasket, RX-20 Felt Hub 1
60 000-064-012 Head, New RX Skid Assembly Complete 5
61 000-068-174 Hose, Vac Hub/Skid 1
62 000-064-011 Head, New RX Cast Skid-Weldment 1
63 000-107-095 Skid Bottom, New Style RX Shoe 1
64 000-076-037 Jet, H 1/8VV 80015 SS-STD 5

Optional: 000-076-052 Jet, 1) 2 Piece Set Twist Out 5

000-076-058 Jet, 1) 2 Piece Brass #8001 5
65 000-094-009 Nut, 5/16-18 s/s Nylock Half 5
66 000-107-0201 Hub with Ring, Double Lead Thread 1

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Page 20 RX-20 / CMX-20

ITEM PART NO DESCRIPTION QTY

67 000-107-089 S/S Heat Treated Star 1
68 000-143-012 Screw, 5/16-18 x ¾" s/s HHC 5
69 000-143-162 Screw, 5/16 x 1" Stripper - ¼-20 s/s 5
70 000-143-166 Screw, 10-24 x d" s/s BTN HD Cap 4
71 000-143-065 Screw, 10-24 x 1¾" s/s BTN HD Cap 5
72 000-174-049 Washer, 5/16" s/s Flat 3
73 000-015-009 Bracket, Hi Speed RX Handle Brace 1

Not Shown:

000-094-036 Nut, ½” NPT Pipe Plastic 1

Used with Item No. 24

000-143-096 Screw, d - 16 x 1" HHC s/s 3

Used with Item No. 54

000-174-055 Washer, Latch Pivot 3

Used with Item No. 54

000-174-057 Washer, d” s/s Lock 3

Used with Item No. 54

HydraMaster Corporation 9/10/98

RX-20 / CMX-20 Page 21

Repair

REMOVAL OF COMPONENTS performance of your RX-20.
Felt Vacuum Seal Replacement: A High Pressure Valve Assembly: The

worn or unlubricated seal will not form valve assembly's moving parts will
a proper seal. Lack of a proper seal eventually wear out it time. Its repair
will impair the vacuuming capabilities or replacement is a relatively simple
of the unit and therefore leave behind operation.
more water in the carpet than is

desirable.
First, remove the vacuum head
assembly as previously described.
Using a pocket knife, carefully pry the
seal up and lift it out. If the seal
appears worn or glazed so that it will 1. Remove the 440 male quick
not lubricate well, try turning it over. If connect (A) with a wrench.
that does not work, or if it is damaged, 2. Remove the five allen head screws
replace it with a new one. We (B) in the back plate on the handle
recommend changing the felt seal after and lift the back panel off.
10 hours of use. Replace it with a 3. Disconnect the stainless steel hose
spare, soaked seal. Press the seal in (C) from the bottom of the valve
place and saturate it with a quality 30 assembly.
weight SAE motor oil. Always place 4. Remove the bolt (D) holding the
the flattened, used seal in an oil bath to trigger.
rejuvenate. (NOTE: 5. Remove the two bolts (E) holding
A tuna fish can is the valve assembly in the handle
the right size and and pull out.
shape and does not 6. The valve may now be rebuilt or
require a large replaced. CAUTION: If the valve
amount of oil.) has been frozen, inspect it for
This seal and its leakage before reinstalling the back
condition play an plate.
important part in
the optimum

HydraMaster Corporation 9/10/98

Page 22 RX-20 / CMX-20

Troubleshooting

I. Problem: Low Vacuum Flow at the Solution: Remove cleaning hub

Cleaning Heads from shaft. Clean and re-thread

onto shaft.

Cause: Hub not sealing properly.

Solution: Replace felt seal with a
lubricated one.

Cause: Restricted air flow.

Solution: Check all vacuum hoses
for restrictions.

Cause: Low vacuum flow from power
source.

Solution: Refer to troubleshooting
section of equipment manual.

II. Problem: Low Water Flow at

Cleaning Heads

(Indicated by Irregular Water Temperature)

Cause: Restricted jets.

Solution: Remove jets and clear
them of debris.

Cause: Clogged water strainer.

Solution: Remove water strainer
and clean.

III. Problem: Water Leak at Rotary

Union

Cause: Foreign matter in rotary union

seal.

Solution: Dismantle rotary union.
Clean. Reassemble and install.

IV. Problem: Water Leak at Valve
Cause: Ruptured plunger or valve o-

ring.

Solution: Repair or replace
damaged plunger, o-ring, seal.
Check for freeze damage.

V. Problem: Loss of Oil From Gearbox
Cause: Loose or ruptured oil seal.

Solution: Replace damaged oil
seal. Refill gearbox with oil.

Cause: Kinked or clogged solution
hose.

Solution: Remove hose. Repair or
replace.

Cause: Cleaning hub not properly
threaded to shaft.

HydraMaster Corporation 9/10/98

RX-20 / CMX-20 Page 23

VI. Problem: No Power VII. Problem: Head Wobbles During

Operation

Cause: RX-20 wiring or power source.

Cause: One leg of star bent.

Solution: Have an electrician
inspect unit for possible wiring or Solution: Straighten star.
motor problems.

Cause: Overload power source.

Solution: Locate an unused power
source.

Cause: Gearbox.

Solution: Repair or replace
gearbox.

HydraMaster Corporation 9/10/98

Page 24 RX-20 / CMX-20

Limited Warranty Plan

HydraMaster warrants Rotary Extractor covered under this warranty.
machines of its manufacture to be free
from defects in material and This warranty covers parts, as
workmanship if properly installed, specified, and does not cover labor
maintained, and operated under normal which may be necessary in completing
conditions with competent supervision. repairs. HydraMaster’s liability to
No person, agent, representative or Purchaser, whether in contract or in
dealer is authorized to give any tort arising out of warranties,
warranties on behalf of HydraMaster, representation, instructions, or defects
nor to assume for HydraMaster any from any cause shall be limited to
other liability in connection with any repairing or replacing the defective part
HydraMaster products. This warranty or parts. To qualify for warranty
shall extend to the original purchaser of coverage, defective parts must be
said equipment for the periods listed returned to HydraMaster within 30
below from date of installation. If days. No warranty liability whatsoever
repairs or replacements are made by shall attach to HydraMaster unless and
the Purchaser without HydraMaster’s until HydraMaster has received
written consent, HydraMaster’s payment in full for the warranted
warranty shall cease to be in effect. machine or part.

Machinery, equipment and accessories Except as stated in this section and in
furnished by HydraMaster, but the proceeding section and except as
manufactured by others, are warranted to title, there are no guarantees or
only to the extent of the original warranties of merchantability, fitness,
manufacturer’s warranty to performance or otherwise, express,
HydraMaster unless otherwise specified implied or statutory, and HydraMaster
in the listing below. shall have no liability for consequential,

incidental or other damages howsoever
HydraMaster agrees, at its option, to caused.
repair at the point of shipment, or to
replace without charge, any parts or All components not specifically
parts of products of HydraMaster’s referenced in the schedule below are
manufacture, which within the covered under this warranty for a
specified warranty period shall be period of one (1) year, excepting those
proved to HydraMaster’s satisfaction to parts which are considered, by
have been defective when shipped, HydraMaster, to be expendable in
provided the purchaser promptly normal use.
notifies HydraMaster, in writing, of
such alleged defect. HydraMaster will (Continued on the following page...)
pay all freight and transportation
charges, via normal ground shipping
means, for replacement of parts

HydraMaster Corporation 9/10/98

RX-20 / CMX-20 Page 25

(Limited Warranty Plan continued...)

Freezing of any water or chemical
related component will VOID all
warranties on water or chemical related
components, internal or external, of
this equipment.

Deposits and build-up in the water or
chemical systems due to hardness in
the water used or chemicals which
results in deposits, will VOID all
warranties on affected components.

All recommended maintenance must be
performed by competent service
personnel.

For service, contact the distributor where the machine was purchased or

call our Customer Service Department:

Monday through Friday ! 8:00 am To 5:00 pm PST

Parts: [phone]

Service: [phone]

Parts and Service FAX: [phone]

Records of periodic maintenance must

be kept and copies may be required to

be furnished to HydraMaster before this

warranty is honored.

Coverage Schedule

Frame, Handle, Body ...... 3 years

Gearbox .........Year 1 : 100%

................ Year 2 : 50%

................ Year 3 : 30%

Motor .................1 year

Valves, Filters, Hoses ......1 year

11015 47th Avenue W !! Mukilteo, WA 98275

HydraMaster Corporation 9/10/98