The Karcher HD 7/20 G Classic is a powerful cold water high-pressure cleaner designed for professi...The Karcher HD 7/20 G Classic is a powerful cold water high-pressure cleaner designed for professional use, particularly in the construction industry, municipalities, and for building cleaning. It is ideal for locations without an external power supply, featuring a robust EU Stage V petrol engine. With a working pressure of 200 bar and a flow rate of up to 700 litres per hour, it delivers outstanding cleaning results. The machine is built for mobility and durability, with puncture-proof wheels and a stable tubular steel frame. It also includes an ergonomic push handle, integrated accessory storage for hoses and lances, and compact dimensions for easy handling and transport in cars. Key components like the crankshaft pump and a large water filter are protected by a thermo and safety valve, and all parts are easily accessible for servicing. Please note: this machine requires a water feed with a pressure of at least 1 bar and is not designed for drawing water from unpressurised sources like water tanks. It features a convenient manual pull start and complies with EU STAGE V exhaust emissions requirements. Specifications include a drive type of Petrol, flow rate of 700 L/h, operating pressure of 200 bar, and a maximum pressure of 250 bar. The machine weighs 36.2kg with accessories and has dimensions of 878 x 538 x 702mm. Contents include the pressure washer, a water filter, a 10-meter high-pressure hose, and a power nozzle.
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This guide is for professionals in construction, municipalities, and building cleaning who need a powerful and mobile cleaning solution. The Karcher HD 7/20 G Classic delivers outstanding cleaning results in locations without an external power supply, thanks to its robust petrol engine and high-pressure performance. Keep in mind that this machine requires a water feed with a pressure of at least 1 bar.
All features
Model Part Number
HD 7/20 G Classic
Brand
Karcher Pro
Extended Product Information
FAQs
What type of fuel does the HD 7/20 G Classic use?
The HD 7/20 G Classic uses petrol as fuel. Refer to the engine manual for the correct fuel type.
How do I prime the pump?
Ensure the water supply is connected and turned on. Then, start the engine and engage the spray gun to allow the water to flow through the pump.
Can I use the HD 7/20 G Classic to draw water from a tank?
No, the HD 7/20 G Classic requires a water feed with a minimum pressure of 1 bar and is not designed for drawing water from unpressurized sources.
How often should I change the oil?
Refer to the engine's manual for oil change intervals. This varies depending on usage and operating conditions.
What should I do if the engine won't start?
Check the fuel level, spark plug, and engine oil. Also, inspect the pull cord and ensure the on/off switch is engaged.
How do I store the machine during the winter?
Drain all water from the pump, hoses, and spray gun. Store the unit in a dry, frost-free location.
What accessories are included?
The package includes the pressure washer, a water filter, a 10-meter high-pressure hose, and a power nozzle.
What is the warranty period for this product?
The warranty details are not provided in this document. Please refer to your purchase documentation or contact the manufacturer for warranty information.
Troubleshooting
The machine won't start.
Check the fuel level, ensure the on/off switch is engaged, and check the engine's oil level. Verify the pull cord is functioning correctly.
Low water pressure.
Check the water supply pressure. Clean the nozzle and water filter for any blockages. Inspect the high-pressure hose for kinks or leaks.
The engine is running, but no water is coming out.
Check the water supply. Ensure the water inlet filter isn't blocked. Check the high-pressure hose and nozzle for obstruction.
The machine is losing pressure during use.
Check for leaks in the high-pressure hose or fittings. Inspect the pump seals and valves for wear or damage.
Pros and Cons
Pros
High cleaning power suitable for demanding tasks.
Operates independently of a power supply, offering great flexibility.
Durable construction ensures long-term reliability.
User-friendly design with ergonomic features and storage.
Compact size allows for easy transport and storage.
Cons
Requires a water feed with at least 1 bar of pressure.
Not designed for drawing water from unpressurized sources.
Petrol engine requires regular maintenance and fuel.
Heavier than electric models due to the engine.
Requires manual pull start.
Setup, Compatibility & Care
Setup:
Unpack the unit and familiarize yourself with all components.
Connect the high-pressure hose to both the machine and the spray gun.
Attach the power nozzle to the spray gun.
Connect a water supply hose to the water inlet.
Ensure the water supply has a pressure of at least 1 bar.
Fill the petrol tank with the correct fuel.
Compatibility:
The HD 7/20 G Classic is compatible with standard water supply hoses and nozzles.
It is designed for use with clean water; using contaminated water may damage the pump.
Care:
Regular Cleaning: Clean the water filter regularly to prevent blockages.
Storage: Store the unit in a dry, frost-free place when not in use.
Winterizing: In cold climates, drain the water from the pump and hoses to prevent freezing and damage.
Maintenance: Regularly check and change the engine oil, spark plug, and air filter as per the engine's manual.
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