Price: $6,976.00
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Please call us at 1-800-471-7157.



Price excludes freight.

View This Video - Discover Daimer's Absolutely

Outstanding Wet Steam Degreasing Capabilities

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truck mount pressure washer, steam pressure washer

The Super Max™ 12840 AST® is a powerful, mobile, industrial, tri-mode electric pressure washer that can be used independently as a cold water, hot water, or steam pressure washer. This versatile pressure washer machine features the world's only AST® (Automatic Shutoff Technology). This exclusive technology reduces wear on this pressure washer machine and greatly extends its life.

Powered by a vigorous 5 HP NEMA engine, this powerful pressure washer offers a higher flow rate (4 GPM) at a higher pressure (2000 psi) than the 12820 AST® pressure washer equipment. The 12840 AST® also provides the customer with the opportunity to select either no.1 or no. 2 heating oil, diesel, or kerosene heating. Further adding the versatility of this machine is its trailer mountable capabilities, as well as the ability to be purchased with a optional two gun operation. The Super Max™ 12840 AST® is the ideal mobile pressure washer solution for industrial users requiring versatility and greater power than offered in the 12820 AST®.

What is AST® Technology?

AST® is a proprietary system that works as follows: When AST® is engaged, it shuts off the pump and motor after 30 seconds if the gun is not in use and water is not flowing through the system. When the pressure washer operator pulls the trigger again, the motor and pump go on. This feature is particularly useful for applications in which the pressure washer operator is using a long hose, say more than 25 feet, and it is not practical for them to go back and forth to the machine to turn it off during every break.

The pumps and motors in conventional electric pressure washers remain active whether or not water is flowing through the system. As a result the user has to keep walking back to the system to shut it off or risk damaging the motor and pump.

Daimer offers pressure washers in a variety of power configurations for worldwide requirements. The following are available: 110-120V, 208V, 220-240V, 380V, 415V, 440-480V, and 575V; single and three phase; 50 or 60 Hz. Please contact us for pricing.

Product Specifications

Warranty1 year (limited)Water Pump Warranty5 years (limited)Motor/Engine Warranty2 years (limited)
Pressure2000 psi
Flow Rate4 GPM
Temp. Optionscold, hot, wet steam
Steam Temp.up to 330º F
Hot Water Temp.180ºF - 210ºF
Standard Power Methodelectric: 230V, single phase, 60 Hz
Optional Power Methods(call for pricing) 230V, single phase, 50 Hz; 230V, three phase, 50 or 60 Hz; & 440V, three phase, 50 or 60 Hz
Motor Sizeheavy duty 5.0 HP - NEMA
Minimum Generator Size15000 watts
Gasoline/Diesel Fuel CapacityN/A
Ignition Systemelectronic direct spark
Power Cords1
Heating Methodno.1 or no. 2 heating oil; diesel; or kerosene
Heating Fuel Capacity9 gallons
Heater Exchange Coilheavy duty schedule 80 heating coil
Heater Response Timeconverts cold water to hot water in approximately 30 seconds
Operating Timecontinuous use
Pump Drive Methoddirect drive
Chemical Infusionyes, high pressure injection
Wand Includeddurable 3' trigger wand with quick disconnect
Nozzles Standard0º (blast), 15º, 25º, 40º, steam nozzles
Pressure Hose50' high pressure steam hose
Pressure Hose Optionsadditional/customizable lengths available
Dimensions25"w. x 32"d. x 42"h.
Weight575 lbs
Housingstainless steel and powder-coated, high gloss, chip/chemical resistant
Colorblack and silver
Phosphatizing SystemN/A- see Super Max 12840 AF
Acid/Phosphate Chemical FeedN/A
Trailer Mountwheels removed - same price
Multi-Gun Operationoptional - call for pricing
Wall MountN/A
Wet Sandblasting Systemoptional - call for pricing
Exclude From ConfiguratorNo
Activate Promotion PopupNo
Show Free Shipping BannerNo
AB TestingNo

Parts List


Standard Parts / Quantity

3' Durable Trigger Wand with Quick Disconnect
0º (Blast) Nozzle (not shown)
15º Nozzle (not shown)
25º Nozzle (not shown)
40º Nozzle (not shown)
Steam Nozzle (not shown)
50' High Pressure Steam Hose (not shown)



Fight Grease and Oil With Heated Power Wash Systems

In industrial settings, such as automobile production units, the floors, machinery, walls and other hard surfaces can quickly get dirty and dull with dust, grime, grease, and oil deposits. To ensure safe and clean working environment for the employees, it is necessary to clean off all the mess on a daily basis. Simply scrubbing and washing may not help get the surfaces clean and oil-free. These traditional techniques also involve spending lots of time and effort on the cleaning tasks. For this reason, cleaning experts now utilize diesel pressure washers equipped with powerful cleaning functions.

Maintaining greasy and oily surfaces demand the use of heat to dissolve the grease and oil particles. You must choose heated or tri-mode pressure washers, to clean greasy floors or equipment. Daimer® offers you an exciting range of tri-mode, industrial and commercial pressure washers. The Super Max™ 12840 AST® is among those powerful and versatile pressure washers empowered with advanced technologies and functions. Powered by 5.0 HP NEMA engine, such gas pressure washers generate pressure levels of 2000 psi and flow rates of 4 gpm.

These diesel pressure washers are powered by electricity and can be heated by diesel or kerosene. These hot water power washers eject hot water at temperatures as high as 210ºF, to efficiently dissolve grease and oil deposits. The trailer mountable configurations of these mobile pressure washers make them perfect for maintaining vast areas. The heavy-duty heater exchange coils convert cold water to hot water in nearly 30 seconds.

For industrial cleaning professionals, who expect improved versatility, power and mobility from their electric pressure washers, the Super Max™ 12840 AST® will be an ideal choice.

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