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Your Nautilus MX3-500H is designed to give you years of reliable service. If a problem should arise use the 
troubleshooting section in the operation manual to diagnose and correct the problem if possible.  
 
If you are unable to determine the cause or solution to the problem contact your distributor or Hydro-Force 
for assistance. 
 
Hydro-Force warrants the roto-molded tanks and base of the Nautilus MX3-500H to be free from defects in 
material or workmanship for five years from the date of purchase.  
All other components of the Nautilus MX3-500H are warranted to be free of defects in material and 
workmanship for one year from the date of purchase.  
 
During the warranty period, Hydro-Force will, at its option, repair or replace components which prove to be 
defective. This warranty does not provide for replacement of complete units due to defective components. 
Any costs for transportation or related service labor are not covered in this warranty. Replacement parts are 
warranted only for the remainder of the original warranty period. 
 
This warranty shall not apply to defects resulting from improper operation, lack of maintenance, 
unauthorized modification, chemical incompatibility, misuse, abuse or exposure to freezing temperature 
conditions. It does not cover normal wear items such as o-rings, valve seals, pump seals, hoses, jets, cords, 
batteries, or other items which require replacement as a result of ordinary usage. 
 
To obtain warranty service for the Nautilus MX3-500H, contact your distributor or Hydro-Force. If the 
extractor must be returned to Hydro-Force or an authorized service center, the purchaser shall prepay 
shipping charges for products returned for warranty service. No returned items will be accepted by Hydro-
Force without prior authorization. All returns must have a return authorization number, issued by Hydro-
Force, clearly marked on the exterior of the package. 
 
Hydro-Force makes no other warranty either expressed or implied with respect to this product. 
 
The remedies provided herein are the purchaser’s sole and exclusive remedies. In no event shall Hydro-Force 
be liable for any direct, indirect, special, incidental or consequential damages. 
 
This warranty gives you specific legal rights. You may also have other rights which vary from jurisdiction to 
jurisdiction. 
 
 
 
 
 
 

Section 

Limited Warranty  

Summary of Contents for Nautilus MX3-500H

Page 1: ...1 REVISED 01 29 2015 LMANN14 MX3 500H Nautilus Operating Manual ...

Page 2: ...ctrical Supply 9 Water Supply Chemicals 10 Solution Hose Pump Priming 13 Heater Vacuum Hose 14 Foam Downer 15 Pump Out System 16 Pressure Adjustments 17 Shutdown Procedures 18 Accessory Storage 19 Troubleshooting 20 Solution Flow Path 23 Wiring Diagrams 24 SECTION 3 Maintenance Technical Maintenance 27 Drawings Parts Lists o Pump 36 o Pressure Regulator 37 o Auto Fill 38 o Pump Out Pump 41 o Parts...

Page 3: ...roperly operate and maintain the machine and to ensure that the equipment operates at its maximum performance level All users must read and understand this manual completely before operating the machine Always maintain this manual in legible condition adjacent to the Nautilus MX3 500H or place in a secure location for future reference Any questions pertaining to the operating or servicing of this ...

Page 4: ...ard Equipment Vacuum Connection 2 Barb or 2 Male Flash Cuff with 2 Male NPT Vacuum Hose 25 X 1 1 2 with 1 1 2 cuff 2 cuff 2 Female Flash Cuff x 1 1 2 hose adapter Carpet Wand 1 1 2 SS Dual Jet S Bend Wand AW29 Accessory Mounting Hardware Four 1 4 20 x 5 8 SS Screws and Washers HP Solution Hose 25 x 1 4 with 1 4 male female quick connects Power Cords 2 25 x 12gauge with male female plug ends Electr...

Page 5: ...se Sold per foot No cuffs AH36 2 cuff for 1 1 2 Vac Hose AH46 1 1 2 cuff for 1 1 2 Vac Hose AH42 1 1 2 Hose Connector PVC AH74 HP Solution Hose 1 4 X 25 w M F Quick Connects AH79D 1 4 Male Quick Connect AH102B 1 4 Female Quick Connect AH101B Pump out Hose AH65 Hydro Filter II AC10 Replacement Screen for Hydro Filter II AC10C Metering Tip Kit PDE001 12 3 X 25 Power Cord AX32 12 3 X 50 GFCI Power Co...

Page 6: ...the same configuration as the plug No plug adapter should be used with this machine The power cords supplied with this machine are properly sized to handle the electrical load of this machine and properly grounded as described above Any extension cords used with this machine must be similarly sized with an equal or greater load rating and grounded to assure safe operation A properly sized or rated...

Page 7: ...30ºF Rinse the solution tank chemical system and pump with fresh water after each day s use Do not allow pump to run dry Always maintain adequate solution level to supply solution pump High Pressure solution hoses may rupture if worn or damaged Do not use HP solution hoses if hose covering is cut bulging or otherwise damaged Examine HP solution hoses daily and replace or repair hoses as needed Use...

Page 8: ...parallel 1 Connect the discharge exhaust hose from vacuum 1 to the exhaust pipe on machine base 2 Place the rubber stopper into the vacuum inlet port of vacuum manifold number two 3 Open vacuum gate valve and attach the Gatekeeper to prevent accidental valve closure When connected in parallel both vacuums must be running during cleaning Vacuums cannot be operated individually To connect vacuums in...

Page 9: ... the circuit breaker immediately but it may not provide sufficient voltage for proper operation and the breaker may trip eventually Plug the two power cords into two outlets from different circuits If the Dual Circuit Indicator green light fails to light you may be on the same circuit and may need to select a different plug for one of the cords If the Dual Circuit Indicator green light comes on yo...

Page 10: ...ed by the metering tip and the dilution rate can only be changed by changing the metering tip See How to Change the Metering Tip on Page 11 for instructions Chemical Feed Setup Remove the chemical feed hose from the solution tank Make sure float is attached to valve and hanging freely above the bottom of the solution tank Adjust float height to maintain adequate water level Place the end of the ch...

Page 11: ... rates are based on chemicals with water like viscosity Thicker more viscous chemicals will dilute at a different rate For powdered chemicals a liquid concentrate must be made Mix the concentrate according to the manufacturer s directions and then select the appropriate metering tip Contact your distributor or Hydro Force if you have questions about your chemical Metering Tip Application Chart Met...

Page 12: ... to the float valve Unhook the float from the beaded chain on the valve Unsnap the hook from the beaded chain on the float Move the bottle down to decrease the water level Move the bottle up to increase the water level Snap the back onto the float chain hook the float back onto the valve chain Turn the water supply back on If the chemical is not drawing or if the tank is not filling or is overflow...

Page 13: ... if flow is low or unsteady check the hose from the solution tank to the pump as well as the filter for clogging kinks or restrictions Clean or replace hose and or filter and repeat the priming procedure If you are having trouble with the pump refer to the trouble shooting guide or contact your distributor for advice or assistance 4 Connection of Solution Hose Connect the high pressure solution ho...

Page 14: ...ng the amount of time the wand is sprayed Taking additional drying stokes without spraying water between spraying strokes will help increase the potential temperature rise 6 Connection of Vacuum Hoses The vacuum connection port on the machine can be either a 2 hose barb or 2 male Flash Cuff Both are included with your MX3 500H The desired connector can be threaded into the vacuum port on the front...

Page 15: ...mically NO LABOR is involved to spray or spread defoamer it s all automatic Keeps silicone defoamers off the floor where they can cause resoiling problems The Foam Downer is an attachment that allows the vacuum to draw a small amount of defoamer in a constant slow flow into the waste tank of the Nautilus We recommend using a diluted defoaming solution of four ounces of defoamer to one gallon of wa...

Page 16: ...s the Waste Pump switch is turned ON It is made to run continuously while cleaning as this type diaphragm pump can run dry without damage When ready to begin cleaning turn the Waste Pump switch to the ON position If not using the waste pump out the pump out hose does not need to be connected When the recovery tank fills during cleaning the float assembly in the vacuum inlet filter will rise and wi...

Page 17: ...the pressure setting that best meets your type of cleaning Pressure gauge Regulator Unloader To increase the solution pressure turn the regulator knob clockwise To decrease the solution pressure turn the regulator knob counter clockwise The maximum pressure setting is 500psi however the highest pressure attained is dependent on the amount of water flow at the tool Smaller jets and lower flow will ...

Page 18: ...ean the filter as needed Replacement filter screens are available AC10C Disconnect the vacuum hose and solution hose from the machine If water remains in the solution tank use the vacuum hose and vacuum the excess water from the tank If the optional auto fill system was utilized place the chemical feed hose back into the solution tank If the optional Auto waste pump out system was used o Turn the ...

Page 19: ...X3 500H has two sets of cord wraps to hold two 12 3 x 25 power cords Carpet Wand Storage The front of the MX3 500H is designed to hold a S Bend Carpet wand and has two straps to hold it securely Optional strap for larger wands available Other Tool Hose Storage Each side of the MX3 500H has a set of molded in threaded inserts to which holders can be attached to hold other accessories or supplies ma...

Page 20: ...on inlet filter plugged Clean or replace filter Hose from solution tank restricted Repair or replace hose Pump intake hose or fittings leaking Repair or replace hose Tighten clamps or replace fittings Pressure regulator sticking Lube o rings on regulator piston PAGE 33 Pressure regulator faulty Repair or replace pressure regulator PT021 Filter screen or jets plugged on tool Clean out filter or jet...

Page 21: ...aged Replace gasket NM5718 Drain valve open Close valve Drain valve leaking Repair or replace drain valve PEA11 Vacuum motor hoses loose leaking Reconnect or replace vacuum motor hoses Vacuum Valve in wrong Position Check Vacuum Gate Valve Position PAGE 8 Vacuums not connected properly See vacuum connection instructions PAGE 8 Vacuum hose or tool clogged Clean out vacuum hoses and tool Vacuum hose...

Page 22: ... free hanging properly Float too high Adjust chain to set float at proper level Water Pressure too high Use pressure regulator on auto fill hose Float valve faulty Repair or replace float valve Chemical Jug Foot valve in Filter stuck Clean out foot valve and filter Filling with Foot valve in Filter faulty Replace foot valve and filter PDE100 11P water Overflowing Water Not Faulty switches or inter...

Page 23: ...ss water flow from pressure regulator Denotes incoming water flow MX3 500H Solution Flow Path Solution Tank Pump AP52 Gauge Filter Pressure Regulator PT021 Outlet Quick Connect Chemical Jug Optional Auto Fill Float Valve Assembly Optional Auto Fill Inlet Quick Connect 1750W Heater ...

Page 24: ...ing Diagram MX3 500H Wiring Diagram Cord 1 VAC 1 HEATER PUMP OUT SOL PUMP Machine Base COOLING FAN Dual Circuit Indicator VAC1 VAC2 VAC 2 SOLUTION PUMP PUMP OUT HEATER 1750W 1 CIRCUIT CORD 1 12GA 12 3 10AMP BREAKER ...

Page 25: ... MX3 500H Wiring Diagram Cord 2 VAC 1 HEATER PUMP OUT SOL PUMP Machine Base COOLING FAN Dual Circuit Indicator VAC1 VAC2 VAC 2 SOLUTION PUMP PUMP OUT HEATER 1750W 1 CIRCUIT CORD 2 12 3 10AMP BREAKER 12GA ...

Page 26: ...ution pump motor When not using solution Extracting only do not turn this switch ON OPTIONAL Waste Pump Switch Power from Cord 2 Do not turn Waste Pump Switch ON unless a hose is connected to the Pump out Outlet port For pump protection there is a pressure switch which will turn the waste pump off if the pressure in the discharge line gets too high as it would if the pump was turned on while the o...

Page 27: ...ords Failure to do so may result in severe personal injury or death OPERATION INTERVAL Page CLEAN CHEMICAL FEED FILTER FOOT VALVE Daily After Each Job 28 CLEAN VACUUM SHUTOFF ASSEMBLY SCREEN Daily After Each Job 28 CLEAN HYDRO FILTER II Daily After Each Job 29 RINSE OUT RECOVERY TANK Daily 29 CLEAN WASTE PUMP OUT PUMP Daily 30 FLUSH SOLUTION TANK AND PUMP Daily 30 CLEAN PUMP INLET FILTER Weekly As...

Page 28: ...vacuum motors Operating the MX3 500H without the Vacuum Shutoff Assembly or with a poorly maintained assembly will greatly decrease the life of the vacuum motors and will void the warranty If debris builds up on this filter it will reduce the vacuum air flow and may cause a significant decrease in the rate of water recovery If debris prevents the float from moving or seating against the Filter Cap...

Page 29: ...ith clean water Examine the o ring lid seal and replace as needed Re install the new or cleaned screen Screw the lid back onto the body and turn clockwise to tighten RINSE OUT RECOVERY TANK Build up of fine silt sand and other debris in the recovery tank can damage the Drain Valve and Waste Pump if so equipped Hair and fibers in the recovery tank can clog the vacuum filter and Pump out filter if s...

Page 30: ...LUSH SOLUTION TANK AND PUMP Pour two or three gallons of clean water into the solution tank With Cords 1 2 plugged in connect the pump prime hose to the solution outlet female quick connect Direct the end of the pump priming hose into the recovery tank vacuum barb Turn one or both of the vacuums ON and turn the solution pump ON Let the pump run until most of the water has been pumped out of the so...

Page 31: ...FILTER A restricted Pump Inlet Filter can prevent the solution pump from providing adequate pressure for cleaning A restriction or air leak on the pump inlet hose can also damage the solution pump check valves and plunger seals To examine the filter open the solution tank lid on the front of the machine The filter is in the bottom of the solution tank Grasp the filter cap and unscrew the filter fr...

Page 32: ...as been drawn through the proportioner and mixed with the incoming water The metering tip can be removed from the proportioner to speed up the process Once the rinse solution has been drawn through the proportioner turn off the water faucet and disconnect the Auto Fill Water Supply Hose Plug in Cords connect the vacuum hose to the vacuum barb turn on one or both vacuums and use the vacuum hose to ...

Page 33: ...xamine Piston and Seal Replace as needed 6 Use a synthetic grease with Teflon such as Ultra Slick or Super Lube to lubricate the seal on the regulator piston 7 Place the piston back into the opening on the regulator body 8 Place the Spring Plate on top of the piston Concave side toward piston 9 Place the spring back into the handle and thread the handle back onto the regulator body Brass Knob Spri...

Page 34: ...r deep scratches Deep scratches will allow water to flow past gaskets and leak from valve Replace valve if needed Examine the gaskets and replace if cut torn or deformed Raised rounded side of gasket goes toward valve slide Larger flat sides seat on ring on flange and outlet adapter Sand and debris will collect in the bottom of the valve body and prevent the slide from going down and seating prope...

Page 35: ...age to the Float valve and chemical proportioning mechanism 4 Turn the solution pump switch to the ON position and perform the pump priming procedure Hold the priming valve open for a few extra seconds to be sure the anti freeze has passed through the priming valve When the pump is primed allow the anti freeze to circulate for 5 10 minutes Mix and add more anti freeze solution as needed For machin...

Page 36: ...36 Parts Replacementpartsavailableforrepairof yourMX3 500H Section 3 KIT A PT054 KIT B PT055 KIT C PT056 MX3 500H PUMP AP52 PARTS ASSEMBLY ...

Page 37: ...E 1 7 PLUNGER GUIDE 2 8 HEAD BOLT 6 9 MOUNT BOLT 4 10 WASHER FLAT M6 STAINLESS STEEL 10 NS PUMP COMPLETE WITH MOTOR 1 AP52 NS PUMP COMPLETE WITHOUT MOTOR 1 PT065 NS MOTOR 1 PT066 PUMPTEC 207 PUMP AP52 PRESSURE REGULATOR PT021 DESCRIPTION 1 REGULATOR BODY 2 SS SEAT O RING PT020S 3 PISTON AND SEAL PT020A 4 SPRING PLATE 5 SPRING 6 BRASS KNOB 7 REGULATOR COMPLETE PT021 7 2 7 6 5 4 3 ...

Page 38: ...38 OPTIONAL AUTO FILL ASSEMBLY M013 NM5740 Float Valve Assembly See Parts Breakdown on Next Page BR286 BR286 BR138 NM5751 NM5751 BR282A AH102B BR282A ...

Page 39: ...39 OPTIONAL AUTO FILL FLOAT VALVE ASSEMBLY NM5740 ...

Page 40: ...40 Optional Pump Out Pump AP37 PARTS ASSEMBLY ...

Page 41: ...41 2 4 4 6 7 10 11 3 8 9 3 5 1 8 9 8 9 2 39 12 8 9 ...

Page 42: ...42 8 9 15 16 17 18 19 19A 8 9 21 22 23 23A 24 25 32 32 37 38 39 55 56 40 9 CONTROL PANEL REAR VIEW BASE BASE SKIRT HINGE SCREWS 100 104 41 41A 55 56 20 40 40 ...

Page 43: ...43 27 27A 28 29 29 31 31 9 9 32 32 33 34 35 38 37 1 39 13 14 14A 30 30 26 REAR VIEW BASE BASE SKIRT RECOVERY TANK VACUUM PLUG ASSEMBLY 109 106 107 108 36 79 ...

Page 44: ...44 32 44 37 46 46 47 47 48 50 9 50 9 52 51 53 TOP VIEW OF BASE 3 58 59 52 114 55 56 55 56 106 32 43 3 58 59 115 117 ...

Page 45: ...45 48 49 49 47 47 47A 47A 47 47A 51 51 37 9 54 64 9 54 64 9 54 64 52 VACUUM MOUNTS CONNECTIONS 47 47A ...

Page 46: ...46 60 60 3 59 39 57 56 61 62 9 54 63 55 3 59 61 62 121 37 69 67 68 AP52 PUMP WITH MOTOR BOTTOM VIEW OF BASE 112 45 9 54 ...

Page 47: ...47 9 41 2 BOTTOM VIEW SOLUTION TANK BASE SKIRT 72 1 73 9 9 8 8 39 74 75 76 77 77 78 34 36 36A 30 30 2 119 120 31 80 55 ...

Page 48: ...48 2 39 1 72 73 73 67 9 30 31 82 83 2 83 82 84 INSIDE SOLUTION TANK BOTTOM VIEW SOLUTION TANK ...

Page 49: ...9 101 102 VACUUM SHUTOFF ASSEMBLY 91 86 92 86 88 89 90 85 81 INSIDE RECOVERY TANK WITH OPTIONAL PUMP OUT FILTER IN PLACE INSIDE RECOVERY TANK VACUUM SHUTOFF AND OPTIONAL PUMP OUT FILTER REMOVED 116 87 85 ...

Page 50: ...50 96 91 97 9 88 111 94 105 93 OPTIONAL PUMP OUT CONNECTIONS 99 95 118 ...

Page 51: ...51 FLOW 81 92 91 99 96 9 97 105 13 14A 14 95 OPTIONAL PUMP OUT PARTS 1 39 97 9 118 ...

Page 52: ...52 HEATER PARTS 42 42A 98 114 110 71 113 114 ...

Page 53: ...2 10 NM5840 WAND HOLDER STRAP LONG TOP STRAP 30 NM5014 WASHER LOCK SS 11 NM5844 WAND HOLDER BUCKLE 31 NM4063 SCREW 20 X SOCHD SS 12 NM5842 WAND HOLDER STRAP SHORT BOTTOM STRAP 32 NM5722 WHEEL 12 with HUB CAP 13 BR319 ADAPTER MPT X MGH NS NM5010 AXLE CAP PUSH NUT 14 BR325 GARDEN HOSE CAP 33 NM4447 GREEN NEON LIGHT 120V 14A BR600 GARDEN HOSE WASHER 34 NM5754 COOLING FAN NS AH68 BARB 2 X 2 MPT PVC 35...

Page 54: ...NCH 76 NM5732 TERMINAL BLOCK 10 SPACE 52 PA051 HOSE CLAMP 2 2 75 77 NM5142 SCREW 6 X PPH SS QTY 6 53 NM5705 DECAL VAC CONNECTION 78 NM5756 FAN GUARD WIRE FORMED 54 NM5133 SCREW 20 X 2 00 SOCHD SS 79 NM4031 NUT 6 32 NYLOCK SS 55 NM5793 NUT 8 32 NYLOCK SS 80 NM5124 SCREW 8 32 X PPH SS 56 NM5124 SCREW 8 32 X PPH SS QTY 6 81 NM5746 FILTER SS FPT 57 NM5752 LATCH SLIDE QTY 2 82 NM5098 BULKHEAD FITTING 3...

Page 55: ...02 NM5741F FLOAT VACUUM SHUTOFF NS NM5703H WIRING HARNESS UPPER 103 NM5051 STRAIN RELIEF WATER TIGHT NS NM5701H WIRING HARNESS LOWER 104 NM5715 SWITCH PANEL PLUG NS NM5705A DECAL POWER PRIME VALVE 105 BR049 BARB X FPT NS NM5705B DECAL DUAL CIRCUIT LIGHT 106 PHY106 028 RUBBER VACUUM PLUG NS NM5711 DECAL NAUTILUS SIDE QTY 2 107 NM4263 SCREW TEK 10 X 5 8 SS NS NM5758 KIT DUAL CIRCUIT WIRING 108 NM446...

Page 56: ...H07 SOLUTION HOSE UNLOADER TO SOL TANK ID CLEAR COIL NM5086 SOLD PER INCH 32 BOTH ENDS HOSE CLAMP PH07 HP HOSE 1 PUMP TO REGULATOR HP PULSE SOLD ASSEMBLED 50 ITEM 30844 REG END MS PUMP END 3 8 MS HP HOSE 2 PUMP TO GAUGE HP PULSE SOLD ASSEMBLED 45 ITEM PH509 GAUGE END MS PUMP END 3 8 MS HP HOSE 3 REGULATOR TO HEATER HP PULSE SOLD ASSEMBLED 32 ITEM 30845 BOTH ENDS 1 4 MS HP HOSE 4 OUTLET QC TO HEATE...

Page 57: ...ll not apply to defects resulting from improper operation lack of maintenance unauthorized modification chemical incompatibility misuse abuse or exposure to freezing temperature conditions It does not cover normal wear items such as o rings valve seals pump seals hoses jets cords batteries or other items which require replacement as a result of ordinary usage To obtain warranty service for the Nau...

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