Minuteman Ambassador 20 Parts list manual

Parts and Instruction Manual
Ambassador 20

Parts
and Instruction Manual
This manual is furnished with each new MINUTEMAN Ambassador™ 20. This provides the necessary
operating and preventive maintenance instructions. Operators must read and understand this manual
before operating or servicing this machine.
This machine was designed to give you excellent performance and efficiency. For best results and
minimal cost, please follow the general guidelines below:
·Operate the machine with reasonable care.
·Follow the manufacturers suggested maintenance instructions as provided in this booklet.
·Use original Minuteman supplied parts.
TECHNICAL SPECIFICATIONS
Model AmbassadorTM 20
Model No. C8420-115 / C8420-240
Voltage (AC) 115V 60Hz ; 240V 50/60Hz
Current 12 Amps (115V) ; 7 Amps (240V) (50Hz)
Sound Level 79 dBA @ operator’s ear 73.6 dBA @ 3 meters
Brush Speed 1040 RPM
Dimensions (LxWxH) 45 1/8" x 20 3/4" x 38 1-4" (114.6cm x 52.7cm x 97.2cm)
Weight (gross) 234 lbs (106 kg)

Parts
and Instruction Manual
Table of Contents
IMPORTANT SAFETY INSTRUCTIONS.............................................................................................. 1
Machine Overview .............................................................................................................................. 5
Operating Instructions ....................................................................................................................... 6
Accessory Attachments ..................................................................................................................... 6
Exploded Views .................................................................................................................................. 7
Tank Assembly I .............................................................................................................................. 7
Tank Assembly I BOM ..................................................................................................................... 8
Tank Assembly II ............................................................................................................................. 9
Tank Assembly II BOM .................................................................................................................. 10
Base Assembly.............................................................................................................................. 11
Base Assembly BOM .................................................................................................................... 12
Brush Assembly ............................................................................................................................ 13
Brush Assembly BOM ................................................................................................................... 14
Wiring Diagram ................................................................................................................................. 15
Trouble Shooting Guide ................................................................................................................... 17
Solution System ............................................................................................................................ 17
Solution Recovery ......................................................................................................................... 17
Electrical System A.C.................................................................................................................... 18
Minuteman International Made Simple Commercial Limited Warranty........................................ 19

Parts and Instruction Manual
Page 1
COMMERCIAL USE ONLY
IMPORTANT SAFETY INSTRUCTIONS
When using an electrical appliance, basic precautions should always be followed, including the
following:
READ ALL INSTRUCTIONS BEFORE USING
WARNING: To reduce the risk of fire, electric shock, or injury:
•Do not leave appliance when plugged in. Unplug from outlet when not in use and before
servicing.
WARNING
To reduce the risk of electrical shock – Do not expose to rain. Store indoors.
•Do not allow to be used as a toy. Close attention is necessary when used near children.
•Use only as described in this manual. Use only the manufacturer’s recommended attachments.
•Donotuse withdamagedcordor plug. If appliance isnot working as itshould, has been dropped,
damaged, left outdoors, or dropped into water, return it to an authorized service center.
•Do not pull or carry by cord, use cord as handle, close a door on a cord, or pull cord around sharp
edges or corners. Do not run appliance over cord. Keep cord away from heated surfaces.
•Do not unplug by pulling on the cord. To unplug grasp the plug, not the cord.
•Do not handle the appliance with wet hands.
•Do not put any object into the openings. Do not use if any opening is blocked; keep free of dust,
lint, hair, and anything that may reduce air flow.
•Keephair,loose clothing, fingers, and all partsofthe body away from openingsand moving parts.
•Do not pick up anything that is burning or smoking, such as cigarettes, matches, or hot ashes.
•Do not use without dust bag and/or filters in place.
•Turn off all controls before unplugging.
•Use extra care when cleaning on stairs.
•Do not use to pick up flammable or combustible liquids such as gasoline or use in areas where
they may be present.
•Connect to a properly grounded outlet only. See grounding instructions.
SAVE THESE INSTRUCTIONS

Parts and Instruction Manual
Page 2
Inspection
Carefully unpack and inspect your machine for shipping damage. Each unit is tested and thoroughly
inspected before shipment, and any damage is the responsibility of the delivery carrier who should be
notified immediately.
WARNING
•Read Instructions Manual before operating this piece of equipment.
•To reduce the risk of fire use only commercially available floor cleaners and waxes intended for
machine application
•Electrical motors and components can cause an explosion when operated near volatile materials
and vapors. Do not use this machine near flammable materials such as solvents, thinners, fuels,
grain dust, ect.
Electrical – 115V Model C8420-115
This machine is designed to operate on a standard 15 amp. 120-Volt, 60hz,AC circuit. Voltages below
105-Volt AC or above 125-Volts AC could cause serious damage to the motor.
Electrical – 240V Model C8420-240
This machine is designed to operate on a standard 16 amp. type L fused 230-Volt, 50 Hz, AC circuit.
Voltages below 200-Volt AC or above 250-VoltsAC could cause serious damage to the motor.
Grounding Instructions
•This floor finishing machine should be grounded while in use to protect the operator from electric
shock. The machine is equipped with a three-conductor cord and three prong grounding type
attachment plug to fit the proper grounding type receptacle. The green (green and yellow) conductor
inthe cord is the grounding wire. Never connect this wire to anything other than the grounding blade.
•Floor Finishing Machines Rated Less than 150-Volts – If the machine is provided with an attachment
plug,asshown in SketchA, it is intendedfor use on a120-Volt(normal)circuit. If a properly grounded
receptacle, as shown in SketchA, is not available, an adapter as shown in Sketch C, is available and
be installed as shown in Sketch B if the outlet box that houses the receptacle is grounded. Be sure
to fasten the grounding tab with the faceplate screw.
•Floor Finishing Machines Rated More than 150-Volts – If the machine is provided with attachment
plug as shown in Sketch D, it is intended for use in nominal 240-Volt circuit. No adapter is available
for this plug.

Parts and Instruction Manual
Page 3
POUR USAGE COMMERCIAL SEULEMENT
MODE D’EMPLOI SECURITAIRE
Lorsque l’on utilise un appareil électrique, des précautions de base doivent toujours être suivies
telles que:
BIEN LIRE LE MODES D’EMPLOI AVANT USAGE
AVERTISSEMENT - Pour réduire les risques de feu, choc électrique ou blessure:
• Ne pas quitter l’appareil lorsque la prise de courant est branchée. Débrancher de la sortie
électrique lorsque la machine n’est pas en usage ou pour en faire le service.
AVERTISSEMENT
Pour réduire le risque de choc électrique - Ne pas exposer à la pluie - Entreposer à l’intérieur.
• Ne jamais laisser des enfants ou des adultes inexpérimentés faire fonctionner cet appareil.
• Garder la zone de fonctionnement libre de toute personne, particulièrement les petits enfants
et les animaux. Garder les spectateurs à une distance d’au moins 7,6 mètres (25 pieds) de la
zone de fonctionnement.
• Utilisertelqueprescritdanslelivred’opérationetseulementaveclesattachementsrecommendés
par le manufacturier.
• Ne pas s’en servir avec corde ou prise de courant endommangée. Si l’appareil ne fonctionne
pas ou a été échappé, endommagé, entreposé à l’extérieur ou déposé dans l’eau, l’appareil
devrait être envoyé à un département de service pour inspection.
• Ne pas tirer ou porter par le câble ou se servir du câble comme poignée. Ne pas fermer de
portes sur le câble ou tirer le câble près d’objets pointus. Ne pas conduire l’appareil écrasant le
câble et soyez certain de protéger le câble entre toutes surfaces de chauffage.
• Ne pas débrancher en se servant du câble. Pour débrancher tirer sur la prise et non sur le
câble.
• Ne pas manipuler la prise ou l’appareil avec les mains mouillées.
• Ne placer aucun objet dans la sortie et ne pas s’en servir si la sortie est obstruée. Eliminer toute
poussière, maillon, cheveux ou quoique ce soit qui pourrait réduire le mouvement d’air.
• N’exposer aucun cheveux, vêtement, doigts ou autres aux ouvertures de l’appareil.
• Ne rien ramasser de ce qui brûle ou de fumée tels que cigarettes, allumettes ou cendres en feu.
• Ne pas employer sans filtre de poussière ou autre en position.
• Fermer tous les contrôles après utilisation.
• Soyez très prudent lors du nettoyage d’escaliers.
• Ne pas ramasser de liquide inflammable ou combustible tel que gazoline et ne pas utiliser dans
les endroits ou ces derniers pourraient être présent.
• Brancherdans uneprise avecune prisede terreseulement. Voir références pour prise de terre.
CONSERVEZ CES RECOMMANDATIONS
DE MODE D’EMPLOI

Parts and Instruction Manual
Page 4
INSPECTION
Déballer soigneusement en constatant s’il y, a lieu tout dommage apparent. Chacune des pièces
d’équipement est entièrement inspectée à l’usine et tout dommage de transit est la responsabilité de la
compagnie de transport qui devrait être prévenue immediatement.
AVERTISSEMENT
• S.V.P. lire le manuel d’instruction avant d’opérer cette pièce d’équipement.
• Pour réduire le risque d’incendie, se servir de ces appareils uniquement pour usage commercial et
avec les produits contruits spécifiquement pour usage avec ces appareils.
• Les moteurs électriques peuvent être la cause d’explosion si ils sont utilisés près de matériaux ou de
vapeurs explosives. Ne pas opérer près de matériaux inflammables tels que solvant, essence,
poussière de grain etc.
ELECTRICITE - 115 Volt Modèles C8420-115
Ces appareils sont congus pour opérer sur un circuit standard de 15 amp, 120 volt, 60 hz, circuitAC.
Tout voltage en bas de 105 voltAC ou au-delà de 125 voltsAC pourrait occasionner des dommages au
moteur.
ELECTRICITE - 240 Volt Modèles C8420-240
Cesappareils sont congus pour opérer sur un circuit standardAC de 16 amp, fusible type L230volt, 50
hz.Tout voltageen bas de 200voltACou au-delà de 250voltsAC pourrait occasionnerdes dommages
au moteur.
INSTRUCTIONS POUR PRISSE DE TERRE
• Ces appareils doivent posséder une prise de miss à terre pour protéger l’opérateur contre les chocs
électriques.Cetappareilest muni d’une corde électriqueàtroisfils et d’un receptacleàtroisfourchons
et prise de mise à terre pour s’accorder dans un receptacle avec prise de mise à terre réciproque. Le
fil conducteur vert (ou vert et jaune) de la corde électrique est le fil designé comme prise de mise à
terra. Ne jamais relier ce fil à un fil autre que celui de prise de mise à terre.
• Appareils estimés à moins de 150 volts - Si ces appareils offrent une prise de courant tel que dans
le croquisA, ils sont destinés pour utilisation avec un circuit de 120 volts. Si un receptacle avec prise
de mise à terre n’est pas disponible tel que montré au croquisA, un adapteur tel que vu au croquis C
est disponible et devrait être installé tel que montré au croquis B si la boite électrique est munie d’une
prise de mise à terre. Assurez-vous de bien relier la patte de prise avec la vis.
• Appareilsdestinés à plusde 150 volts- Si cesappareilsoffrent une prise de couranttel que demontré
au croquis D, ils doivent être utilisés avec un circuit de 240 volts. Aucun adapteur n’est disponible
pour cette prise.

Parts and Instruction Manual
Page 5
9
7
4
6
8
5
3
2
1
10
12
11
13
14
15
POWER ON INDICATOR LIGHT
MAIN POWER SWITCH
WORKING SPEED DIAL
120V AC PLUG-IN
TRACTION DRIVE LOCK LEVER
BRUSH/VAC SHOE RAISE/LOWER LEVER
SPRAY JET/AUXILLARY FLOOR TOOL HOOKUP
VACUUM SCRUB HEAD HOOKUP
BRUSH PRESSURE ADJUSTMENT KNOB
BRUSH PRESSURE GAUGE
FORWARD/REVERSE SWITCH
PUMP SWITCH, AUTOMATIC AND AUXILLARY
VACUUM SWITCH
TRACTION DRIVE CONTROL LEVERS
DUMP HOSE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Machine Overview

Parts and Instruction Manual
Page 6
Operating Instructions
1. Filling: Fill the solution tank with the desired amount of water and add liquid cleaning
solution to the proper dilution ratio. DO NOT USE powdered cleaning chemicals.
Powders are unlikely to dissolve thoroughly, resulting in clogging the inline solution
filter. This can reduce or stop water flow to the pump and spray jets.
2. Connect power supply cord to grounded wall outlet, Item # 4
3. Engage traction drive system, Item #5
4. Turn on main power switch, Item #2
5. Lower scrub head assembly, Item #6
6. Turn on pump switch to automatic, Item #12
7. Turn on vacuum, Item #13
8. Set forward/reverse switch to forward, Item #11
9. Engage traction drive control levers, Item #14
10. Adjust forward speed #3
11. Brush pressure can be adjusted + or – by knob, Item #9, and viewing gauge, Item #10
in green zone
1. Turn master switch off
2. Disconnect vac hose, see item #8, and attach vacuum hose from remote tool.
3. Disconnect solution hose, see item #7, and install remote tool solution hose to the
quick disconnect. Turn the pump solution switch, item #13, to auxiliary.
4. Turn on main power switch.
5. Turn on switch #13 to activate vacuum motor.
Accessory Attachments

Parts and Instruction Manual
Page 7
Exploded Views
Tank Assembly I

Parts and Instruction Manual
Page 8
1 130029 4 GROMMET .75X.31X.25
2 130118 1 STRAINER-SOLUTION
3 210121 1 DUMP HOSE 200 SERIES
4 260184 1 SUPPORT ANGLE
5 260203 1 CLAMP-HOSE 102120 MURRAY
6 320269 1 STRAP, DRAIN PLUG RETAINING
7 320271 1 FITTING-PP 90 3/8MPT 3/8HOSE
8 420013 1 TUBE 1/2 X 3
9 430089 1 FLOAT 17B
11 450081 2 WSR 1.908 X 2.41 X .03 SS
12 710353 2 SCR-MC 10-32 X .37 ZINC
13 710985 6 SC 3/8-16 X .62
14 711118 14 SCR-ST-A 10 X .75 SS
15 712092 1 SCR 1/4-20 X 2.5 NYL
16 712107 2 SCR-SHOULDER 1/4-20x2.87
17 712563 4 SCR-MC 1/4-20 X 1.00 SS
18 712568 1 SCR-MC 1/4-20 X 2.25 SS
19 712667 5 NUT-HEX NYLOC 1/4-20 SS
20 712683 16 NUT-HEX NYLOC 5/16-18 SS
21 712759 2 WSR-FLT .31 X 1.37 X .06 SS
22 712767 26 WSR-FLT .406 X .75 SS
23 715840 1 DECAL - AMBASSADOR 20
24 762384 2 BUSHING-.277 X .375 X .37 SS
25 828970 2 WSR NEOP 1.87X2.4X.125
26 831812 2 FITTING ABS 1.5MPT 1.5HOSE
27 832896 2 WHEEL-GUIDE
28 832949 2 BRACKET BUMPER
29 833160 1 ADAPTER, PVC 1.5 FPT X 1.5 SLI
30 833254 2 BUMPER WHEEL AXLE
31 833316 1 DRAIN PLUG
32 840001 1 LID TANK AMB 20 BURGUNDY
33 840002-1 1 SOLUTION TANK AMB 20 - BURGUNDY
34 840017 1 DOME AIR / WATER
35 840051 1 BLADDER BAG
36 840054 2 ANGLE, BLADDER SIDE
37 840055 2 ANGLE, BLADDER TOP/BOT
38 840061 1 GASKET, DOME
39 840063 1 FRAME BLADDER MOUNT
40 840069 1 POCKET GASKET
41 840070 1 WASHER PLATE ASSEMBLY
42 840071 1 GASKET SOL/REC
43 840074 1 VALVE PIVOT BRACKET
44 840075 1 FLOAT VALVE
46 840087 1 COVER PLATE/DOME
47 840095 2 PLUG DOME - HEYCO .312
48 840104 1 FILTER ASY / VAC MOTOR
49 840113 2 SIDE PANEL
50 840119 4 GASKET, LID F/R, PVC FOAM
51 840120 2 GASKET, LID LONG, PVC FOAM
52 840121 2 GASKET, LID SHORT, PVC FOAM
Tank Assembly I BOM
ITEM PART NO. QTY. DESCRIPTION

Parts and Instruction Manual
Page 9
Tank Assembly II

Parts and Instruction Manual
Page 10
1 260087 1 HINGE-15" 39A 740787 1 WIRE ASSY. 2 260203 1 CLAMP-HOSE 102120 MURRAY 40 740801 1 SWITCH-ROCKER ON/OFF DPDT 3 260255 1 SPEED CONTROL BRACKET 260TD 41 740806 2 SWITCH-SNAP ACT 20A 1HP 4 260291 2 HANDLE GRIP 260TD 42 741201 1 RECEPTACLE-15A FEMALE SQUARE 5 710204 2 SCR-MC 6-32 X .50 ZINC 43 742145 1 RELAY-MOTOR REVERSE 120V 6 710307 6 SCR-MC 6-32 X 1 ZINC 43A 742146 1 RELAY-MOTOR REVERSE 240V 7 711160 14 SCR-HI/LO #10 X 5/8 ZINC 44 760592 2 KNOB-OVAL TAPERED 8 711322 1 NUT-HEX 5/16-24 ST PL 45 762295 2 BUSHING-ADJ .375 X .62 X .18 Z 9 711372 2 NUT-NYLOC 8-32 46 762331 2 WHEEL,2.5DX1.28W X.38ID 10 711430 3 NUT-TINNERMAN 6-32 47 802657 4 SILCONE BOOT /CARLING SW 11 711506 2 WSR-FLT 5/16 (NARROW) ST PL 48 809754 1 SWITCH-ROCKER
12 711523 2 WSR-WAVE .37 X .68 X .08 49 809874 1 KNOB-SPEED CONTROL 13 711577 4 WSR-FLT .260 X .50 X .020 50 828370 1 BH2-60 FEMALE COUPLER 14 711578 1 WSR-FLT 1/2 BRS 51 828952 1 FITTING PP 1/4MPT 3/8BARB 15 711717 2 RET RING-E EXT .37 52 741205-1 1 CORD ASY, 14/3 75' GFCI-FEM LOCK PLUG 16 711808 2 PIN-HAIRPIN COTTER #13 52A 740477-2 1 CORD ASY-EURO 250V 50FT BLACK 17 712516 2 SC 8-32 X .62 SS 53 830540 1 RECEPTACLE-FLG MALE 15 A 125 18 712537 6 SCR-TR HD 10-24 X .75 SS 54 832859-1 1 INDICATOR LIGHT 115V ASY 19 712540 10 SCR-MC 10-24 X .37 SS TH 54A 832860-1 1 INDICATOR LIGHT ASY 240V 20 712560 13 SCR-MC 1/4-20 X .50 SS NYL 55 833102 1 SPRING-KNOB .60 X .73 X 1.75 Z 21 713005 6 BLT-HH 1/4-20 X 1.5 SS 56 833329SA 1 SWITCH-STAGERED ACTION 22 711373 2 NUT,NYLON 14/20 ZINC 57 840005-1 1 BASE TANK AMB 20 23 712638 2 NUT HEX 10-24 SS NYLOC 58 840013 1 PLATE LEVER SWITCH 24 712665 2 NUT-HEX 1/4-20 SS 59 840014 1 LEVER CONTROL BOX 25 712759 6 WSR-FLT .31 X 1.37 X .06 SS 60 840022 1 LEVER BAR ASY BELT TNSN 26 712761 6 WSR-FLT .28 X 1.25 X .059 SS 61 840023 1 LEVER BAR ASY VAC SHOE 27 712811 2 SCR-MC 10-24 X .50 ZINC 62 840024 2 LEVER - SWITCH 28 712813 2 SCR-MC 10-24 X .75 ZINC 63 840027 1 HOSE CLIP 29 713048 2 BLT-HH 3/8-16 X 2.50 #5 64 840039 1 LEVER PIVOT PIN 30 715383 2 DECAL, MINUTEMAN 65 840040 2 BUSHING-LEVER BOX .396 X .625 31 715621 1 DECAL-VAC/PUMP 66 840057 1 PLATE, SWITCH 32 715622 1 DECAL-DASHBOARD 67 840079 1 AUXILIARY PLATE ASY 33 715623 1 DECAL-BRUSH/TRACK LIFT 68 840080 1 DASH PANEL 34 715626 1 DECAL-SPEED CONTROL 69 840091 1 CABLE-LIFT 35 740187 1 CONTROLLER-2SP 115/230V 70 840092 1 CABLE-TENSION 36 740202 2 RECTIFIER-BRIDGE 50A 600V IMP 71 840093 1 YOKE 36A 740203 2 RECTIFIER-BRIDGE 50A 1000V 72 840097 1 HOSE GRAY WATER 37 740229 1 GAUGE BR PRESSURE 0-1.5 73 840108 1 BRACKET, RELAY 38 740736 2 SWITCH-3 POSITION 74 840128 1 PLATE - RECEPTACLE 39 740738 1 WIRE ASSY. 75 829214 2 RIVET, 1/8 DIA. REFERENCE POP
Tank Assembly II BOM
ITEM PART NO. REQ’D DESCRIPTION ITEM PART NO. REQ’D DESCRIPTION

Parts and Instruction Manual
Page 11
Base Assembly

Parts and Instruction Manual
Page 12
1 260066 1 BUSHING-FLG, .377 X .687 X .406 48 762375 0 KEY .187 SQ. X .78 2 260182 1 HOSE-WIRE REINF 3/8 X 18" 49 762422 2 SPRING, COMPRESSION 3 260203 1 CLAMP-HOSE 102120 MURRAY 50 805634 1 COVER BOX (741012) 4 290017 1 VAC MOTOR GASKET 51 809148 2 RETAINING RING - “E” TYPE EXT .75 5 380064 1 RING, FOAM 52 809226 2 WSR-FLT .40 X 1.50 X .12 6 430051 1 RETURN SPRING-3.00" 53 809880 2 BUSHING 7 450004 1 AIR MANIFOLD 54 828368 1 COUPLER-MALE BH2-61 8 450023 1 SPRAYBAR ASSEMBLY 55 828952 2 FITTING PP 1/4MPT X 3/8BARB 9 450050 2 BUSHING-HEYCO .875 X .875 X 1.72 NYL 56 829067 1 CLAMP-CRIMP 560R 10 450059 1 FITTING BRASS 1/4MPT X 1/4MPT 57 831306 1 FITTING-90 1/4MPT X 1/4FPT BRASS 11 450076 6 CLAMP-CRIMP 185R SS 58 831965 2 PIN-CLEVIS 3/8 X 1.63 12 710154 2 SCR-MC TR HD 10-32 X .625 SS 59 832790 1 HOSE-VAC TANK 13 710307 2 SCR-MC 6-32 X 1.0 ST PL PAN HD 60 833067 1 PUMP-100PSI 115V 14 710986 2 SCR-SC 3/8-16 X .87 ST PL 60A 833068 1 PUMP-100PSI 230V 15 711160 19 #10 X 5/8 HI-LO 61 833265PLT 3 THREADED SPACER ZINC PLT 16 711202 4 BLT-HH 1/4-20 X 0.50 STPL 62 833302 1 DIE SPRING 17 711214 1 BLT-HH 1/4-20 X 2.00 63 833325 1 FITTING NYLON 90 1/4MPT X 3/8 HOSE 18 711280 1 BLT-HH 3/8-16 X 3.50 64 833374 2 PIN-HAIRPIN COTTER 3/8 19 711375 1 NUT-NYLOC 3/8-16 X 1/2 NUT 65 840006-1 1 FRAME WELDMENT 20 711380 3 NUT-NYLOC 3/8-16 NUT 66 840011 1 VAC MOTOR COVER, TOP 21 711400 2 NUT-PIPE LOCK 1/2 67 840012 1 VAC MOTOR COVER, BOTTOM 22 711504 24 WSR-FLAT 1/4 ID SS 68 840018 2 WASHER PLATE 23 711505 3 WSR-FLAT 1/4 69 840042 1 HOSE, VAC MOTOR OUTPUT 24 711506 1 WSR-FLT 5/16 (NARROW) ST PL 70 840044 1 PULLEY, IDLER 25 711507 6 WSR-FLAT .37 X 1.12 X .06 71 840046 1 TENSION ARM ASSEMBLY 26 711512 2 WSR-FLAT .75X1.37X.08 72 840048 1 TENSION PLATE ASSY. 27 711545 4 WSR-HELICAL 5/16 73 840049 2 STAMPED STL PILLOW BLK 28 711808 1 PIN-HAIRPIN COTTER #13 74 840053 1 PIN, VAC SHOE LIFT 29 712310 1 WSR- FLAT .52 X .87 X .06 PL 75 840060 1 BRUSH MOUNT ASSEMBLY 30 712532 4 SCR - #10-24 X 1.00 76 840064-1 1 BRACKET - PUMP MOTOR 31 712540 10 SCR-MC TR HD 10-24 X .37 SS 77 840066 1 BELT-PIRELLI X-DUTY 32 712562 8 SCR - #10-24 X .75 78 840082 1 HOSE-WIRE REINF 3/8 X 24" 33 712575 4 BLT-HH 5/16 -18 - .75 79 840088 1 PULLEY, CAST 34 712605 2 NUT-HEX 6-32 SS 80 840089 1 BAFFLE EXHAUST 35 712665 3 NUT-HEX 1/4-20 SS 81 840090 1 COVER EXHAUST BAFFLE 36 712667 8 NUT, HEX 1/4-20 NYLOC SS 82 840096 1 FILTER EXHST BAFFLE 37 712695 4 NUT-HEX 3/8-16 SS 83 840098 1 HOSE-NYLO REINF 3/8 X 2.75" 38 712758 8 WSR-HELICAL 1/4 SS 84 840105 1 COVER-DRIVE MOTOR 39 712767 4 FLAT WASHER .406 ID X .75 OD 85 840114 1 SPACER,.500 X .250 X .312 40 713049 2 BLT-HH 3/8-16 X 2.75 86 840115 1 DIFFERENTIAL, KEYED 41 740089 1 VAC MOTOR 120V 87 840116 2 WHEEL-8 X 1.5 X .75 BORE 41A 740230 1 VAC MOTOR 240V 88 881059 2 BEARING-COLLAR .75 (2PC) 42 740189 1 TERMINAL BLOCK 89 833341-1 2 BLT-EYE 3/8-16 X 2.62 43 740245 1 SOLENOID-WATER 115V 90 361233 3 KEY-SQ 3/16 X 1-1/2 43A 740240 1 SOLENOID-WATER 240V 50HZ 91 711515 2 WSR-FLT .406 X .812 X .0625 44 740732 1 MOTOR-GEAR 140V DC 92 711124 6 SCR-ST-B 10 X .37 NI 44A 740786 1 MOTOR-GEAR 240V DC 93 711206 4 SCR - #10-24 X .875 45 760251 2 CASTER-3" X 2" 94 241096 1 HOSE-WIRE REINF 3/8 X 45" 46 760859 1 CLAMP-HOSE 95 743903 1 BUSHING - SNAP PLASTIC 47 762073 3 BUSHING .259 X .375 X .265
ITEM PART NO. REQ’D DESCRIPTION ITEM PART NO. REQ’D DESCRIPTION
Base Assembly BOM

Parts and Instruction Manual
Page 13
Brush Assembly

Parts and Instruction Manual
Page 14
1 670669 1 CLAMP-P 3/8 ID
2 700287 1 GROMMET
3 710923 2 SC 5/16-18 X .62 ZINC
4 711018 2 SK 10-32 X .37
5 711160 5 SCR-HI/LO #10 X 5/8 ZINC
6 711232 2 BLT-HH 5/16-18 X 1.50
7 711350 2 NUT-NYLOC 10-32
8 711353 2 NUT-ACORN 5/16-18 ST PL
9 711391 1 NUT-HEX JAM 3/8-16 ST PL
10 711504 2 WSR-FLT 1/4 SS
11 711539 1 WSR-EXT LOCK 3/8
12 711554 11 WSR-INT LOCK 1/4
13 711558 2 WSR-INT LOCK 5/16
14 711717 1 RET RING-E EXT .37
15 712066 12 SCR-ST-PAN HD-AB 10 X 1.25 ZIN
16 712081 2 BLT-SHOULDER 5/16-18 X .75 X .
17 712318 2 WSR-FLT .75 X 1.12 X .12 PL
18 712536 3 SCR-MC 10-24 X .62 SS
19 712560 11 SCR-MC 1/4-20 X .50 SS NYL
20 712638 3 NUT HEX 10-24 SS NYLOC
21 712757 12 WSR-HELICAL #10 SS
22 715090 1 DECAL-BRUSH PRESSURE
23 740740 1 MOTOR BRUSH 120VAC
23A 740785 1 MOTOR BRUSH 240VAC
24 740835-1 1 CORD ASSY-AMB 20 BRUSH DECK
25 760034 1 KNOB-ADJ 3/8-16 THREAD
26 760035 1 BEARING-FLG MOUNTED
27 827894 2 CUP BEARING
28 827896 2 COVER BEARING
29 827903 4 WAVE WASHER
30 828145 2 RET RING
31 828588 2 BEARING-.500 X 1.125 X .312
32 832903 1 BR PULLEY 3-40GR 5MM
33 833281 1 THREADED ROD ADJ SS
34 833326 1 VAC TUBE
35 833342 1 SHAFT PIVOT SS
36 833357 1 PULLEY MTR 20TOOTH 5MM
37 833376 1 BELT-HTD 375-5M-09
38 840007-1 1 VAC SHOE PLTE 12SS
39 840019 1 BRUSH BRACKET
40 840052 1 BRUSH
41 840062-1 1 VAC SHOE 20"
42 840065 1 COVER-BRUSH SPLASH
43 840081 1 AXLE
44 711106 6 SCR - #10-24 X .75, TYPE A
ITEM PART NO. REQ’D DESCRIPTION
Brush Assembly BOM

Parts and Instruction Manual
Page 15
Wiring Diagram

Parts and Instruction Manual
Page 16

Parts and Instruction Manual
Page 17
Use this guide to pinpoint problem areas that may arise with the use of your Ambassador 20.
CAUTION! Unplug supply cord before servicing machine components.
Solution System
I. No water dispensed from spray jets
A. The hose connection at the pump for the spray tube may not be tight. Disconnect, then
reconnect the fitting, to ensure the fittings snap together securely.
B. The solution pump diaphragm may be damaged. Inspect by removing the diaphragm
from the pump and inspect the diaphragm for cracks. Replace if required.
II. Spray intermittent or streaked
A. Solution hoses may be clogged. Replaced kinked hoses if found.
B. The filter strainer in the solution tank may be clogged. Clean the strainer thoroughly.
C. The spray jets may be clogged. Remove the end plug from the spray tube and flush by
turning the pump on. Remove the spray jets from the tube and clean as required. Do
not clean out the hole in the jet with a pin or wire. This may cause permanent streaking.
Solution Recovery
I. Solution recovery is reduced.
A. Vacuum filter maybe clogged. First check filter recovery tank. Clean if required.
B. Check the vacuum hoses for secure fit over the vacuum fittings. Tighten clamps where
used. Also check hoses for cracks, kinks or clogging.
C. Check the seals on the tank covers for damage. Replace if needed. Make sure cover
closes freely without restrictions.
D. Make sure the drain hose on the back of the tank is sealed.
E. Check the vacuum slot on the scrub head for clogging. Clean out the slot if required.
F. Vacuum motor brushes could be worn. Inspect and replace. If motor has run through
two sets of brushes, replace the motor.
Trouble Shooting Guide