F.A.Q

INTRODUCTION

It is important to make sure you do research to ensure you select the correct machine for the application and that it is able to meet the expectation or the task at hand.

A quality brand is important and equally so is that the supplier you are buying from can supply after-sales service, guarantee the availability of spares and offer technical back-up.

The questions below are those that we have found to be the “most asked” and I hope they are of value to you. Should you have another that is not here, we would really like to know so we can add it to the list, please click HERE.

IMPORTANT PRINICIPLES OF CLEANING

With any cleaning task there are numerous forms of energy or actions that take part in the process. The effect of these can be explained better by showing them in a pie-chart format that we call “The cleaning wheel”.

The Cleaning Wheel

To explain this better let us use the example of washing dishes by hand.

Water – this is the water you put in the basin.
Time – how long you want to spend to clean the item.
Chemical – this represents the dishwashing liquid or detergent.
Mechanical – this is the effect of a cloth, brush or sponge on the item.
Heat – the temperature water hot or cold.
Labour – the majority of cleaning tasks require a labour component.

If you change one or more of the components of this pie-chart, then one or more of the other factors will need to change to make up for the change e.g. if I use cold water you lose the efficiency that hot water gives, therefore the HEAT pie will become smaller – to make up the loss of the hot water, you may need to use more dishwashing liquid to remove the spoiling (CHEMICAL), use more a more abrasive sponge instead of a cloth (MECHANICAL) and it will most probably take you longer to clean (TIME).
So, by changing just one of the items of the pie, you have needed to adapt others to make up for the shortfall.

These principles apply to high pressure cleaning also in the following ways:

A cold water machine used in an oily environment will require more chemical to be applied or will take longer using more labour.
A hot water machine generally removes greasy soiling quicker than a cold water machine.
A rotating nozzle will remove caked-on soiling quicker than a standard nozzle and once can conclude that a high pressure cleaner with a higher mechanical action, would also be more effective than for example manual cleaning.

F.A.Q

We are here to help you solve your problems and answer any of your questions.

THE BENEFITS OF USING A HIGH PRESSURE CLEANER

It saves water – cleaning with an open hose-pipe leads to water simply going down the drain and this can be as much if not more than 30L per minute.
It offers a higher mechanical action than cleaning by hand – a high pressure cleaner gives a high mechanical cleaning action when comparing cleaning by hand using a brush, cloth or scourer.
Increased cleaning power – by using a rotating nozzle on a machine, you increase cleaning efficiency by as much as 50%.
It saves detergent/chemical – by removing the majority of soiling and then applying chemical ensures that expensive detergents are applied to the surface to be cleaned and not wasted to remove layers of soiling.
Saving time – higher cleaning efficiency reduces the cleaning time.
Increased productivity – does the job quicker and saves on labour costs.

HOW IMPORTANT IS BAR PRESSURE AND WATER FLOW OF THE MACHINE?

The pressure (measured in Bars or psi) is important to “break through” the dirt and the water flow of a machine (litres per minute or per hour) “moves the dirt along”.

Too often consumers make the mistake of just look at the bar pressure and then notice that the low water supply is insufficient to move the dirt along.  This results in a cleaning task taking longer than planned, an increased labour cost and possibly also of a poor cleaning result.

ARE THERE DIFFERENT GROUPS OF MACHINES?

Hobby or domestic machines

Hobby or domestic machines are in a certain price group and usually have a lower water flow than industrial machines. This is usually due to the smaller motor and components being smaller in the effort of making a cheaper machine to suit the consumers spend on a machine.
The machines are normally powered by a high speed motor (typically 2 800 r.p.m) compared to a 4-pole motor (1450 r.p.m) in their industrial counterparts. Due to the high speed of these domestic motors, they are not intended to be used for extended periods of continuous use i.e. hours on end.
They are not intended to be used in a commercial/industrial application.

Light-Commercial machines

The machines are usually still equipped with high speed motors but now making use of a higher powered motor with a larger component construction than the domestic machines. These machines are suited for entry level commercial application and again not for extended periods of continuous use.

Industrial machines

All machines in this range are equipped with motors in the 1450 r.p.m. category and are suitable for continuous use with voltages ranging in 230V, 400V and also 525V.

DO I CHOOSE A HOT WATER OR COLD WATER MACHINE?

Generally hot water offers a quicker cleaning result and greatly facilitates the removal of oily and greasy soiling. Heat dissolves these oils and in the absence of hot water, you would be required to make use of a chemical to achieve a similar action and this can lead to increased cost.
By first removing oils or soiling using hot water and then applying the chemical will show considerable savings in chemical consumption.

CAN I FIT ANY LANCE ON MY MACHINE?

High pressure cleaners operate by pumping a volume of water through a certain nozzle size.
If you look at your nozzle that is on the inside of the plastic nozzle protector it will have some markings e.g. 25045 – this indicates that the angle of the spray pattern is 25˚ and it is an 045 size nozzle – this is an international standard in nozzle size (not 045 of a mm).

It is important that one does not use a smaller nozzle than what is specified for your model of machine. By doing this, you will operate the machine at a higher pressure rating than what the motor is designed to operate under and this can cause eventual damage to the motor and pump.

By fitting a larger size nozzle, you will reduce the operating pressure and is the preferred method when wanting a lower working pressure when working.

MY MACHINE PRESSURE IT TOO HIGH FOR THE JOB?

When supplying a 400V (3-phase) machine to a carwash, the standard machine is 13L per minute at 180 bar. Using 180 bar at a carwash is regarded as too high and should be reduced.
One way to reduce the pressure for a temporary application is by turning out the control piston – some of the pumped water will be circulated in the pump head, less pressure will be forced through the nozzle and the pressure will reduce.
For extended periods or permanent use at a lower pressure we would rather supply a lance with a larger size nozzle. This will reduce the pressure of the pump to the recommended pressure for a carwash of approximately 140 bar.

I NEED SOMETHING SPECIFIC

In our factory in Cape Town we are able to custom-design a high pressure cleaning system to your requirements with multiple pumps, centralised cleaning systems, piping to various areas from a central pump etc…

ARE THERE ACCESSORIES THAT BROADEN THE MACHINES USES?

Some of the applications mentioned will operate only on certain machines and efficiency will be machine dependent – please enquire from you. Contact your Kranzle branch or Dealer for further information about the correct machine recommendations.

Other than the normal cleaning ability of a machine there are accessories that make your machine more than just a pressure washer:

A rotating nozzle greatly increases efficiency for removing loose paint, cleaning off moss from a roof or paving etc… A Dirtkiller lance is used on machines up to 15L per minute and the larger Turbokiller lance for machine with higher volumes.
A sand-blasting attachment allows one the ability to sand-blast paint from metal and other surfaces. Only possible with machines supplying more than 10L per minute.
A foaming bottle is available as an optional extra for creating a high level of foam to apply detergent to a surface.
The Underbody lance allows easier cleaning under vehicles and areas close to the ground.
A rotating brush offers and brush action for removing stubborn soiling.
A round surface cleaner makes cleaning large areas easier than using a standard lance and prevents excessive spray.
A sludge sucker changes your machine to a pump with the ability to pump up to 20 000L per hour.
The drain cleaning hose that is available in various lengths has multiple nozzles for cleaning drains and pipes that are normally not easily accessible.
A boiler cleaning kit is available for cleaning of boiler tubes of various sizes.

WARRANTY

warranty is usually a written guarantee covering a product and declares the manufacturers responsibility to repair or replace a defective product or its parts.

This normally excludes electrical components and items that wear in the course of normal use e.g. O-rings, seals, hose etc…

A warranty does not release a customer from performing maintenance on a machine or attending to something that can cause greater damage, then claiming complete repairs under warranty.

Many competitor suppliers promised a 2 or 3-year warranty and so often we come across customers that have been promised this, only to be told when they have a breakdown, it wasn’t a defect in workmanship but normal wear-and-tear.

IN CLOSING AN IMPORTANT POINT TO KEEP IN MIND WHEN BUYING A PRESSURE WASHER

The old saying that one must “compare apples with apples” is very important and something to keep in mind.

Common sense dictates that you cannot supply something similar in quality and material at a considerably lower price.

IMPORTANT THINGS TO LOOK FOR IN A HIGH PRESSURE WASHER

The water flow of the machine

A higher water flow machine will move dirt along quicker so a machines offering between 5 – 6L per minute will take longer to clean and do the job.  The higher the water flow of the pressure washer will finish the work in a shorter time period.

A water tank

The machine supplied with a water tank that includes a low-level cut-out is an excellent feature – this water tank acts as a buffer, removes possible air in a water supply system (water and air compress differently) and also fine particulate.  The low-level cut-out switches off the machine if the water flow to the machine is less than what the machine requires thus preventing water starvation of the pump.

Voltage motor protection

The effect of low voltage has been explained above and if a machine is equipped with this protection, it will trip the machine should there be a voltage problem.

This is usually a warning and if ignored or if the motor is continuously reset, it does not prevent damage altogether.

Brass pump head

A brass pump head is considered the preferred material for pumps up to 250 – 350 bar and is an indication of a quality pump in this category.

Pump heads are found to sometimes be made from aluminium and even plastic in some small machines – in high pressure washer machine used for similar application as our Kranzle machines, these materials are normally chosen by the suppliers solely motivated by making a low cost machine.

All Kranzle pump heads are equipped with a drop-forged brass pump head.

Ceramic coated stainless steel pistons

Pistons are one of the key components of a high pressure pump as they create the pressure while travelling along the water and oil seals.

Pistons that are ceramic coated ensure a smoother and slippier surface that comes in contact with the seals, resulting in less wear on the internal seals in the pump.

Stainless steel pistons without ceramic are used and are not as smooth, usually resulting in wear taking place sooner than those with ceramic.

Total stop function

The Total-stop in a Kranzle pump that is a switch that leads to the machine being switched off when the trigger of the gun is released.   Machines that are not equipped with this feature will run continuously in bypass until the operator switches the machine off.

Water circulating inside the pump head while running in bypass becomes sufficiently hot (usually above 60˚C) and at this level can lead to damage to the water seals and a subsequent increase in maintenance costs.

Length of the hose

The length of a hose dictates how far one can work from your machine – a too short hose leads to one having to move the machine closer to your place of work.

Construction of the hose

This all comes down to durability and working life – hose comes in many forms and hydraulic hose should not be compared with high pressure hose.  Hose is normally reinforced with nylon, can be single layer or double layer steel braided.

Feel the weight of the machine

Weight is a good indication that items are made from a durable material.  Lances with pipes made from stainless steel tubing will have a much longer life than those made from plastic.

If it is light-weight, the chances are good that much of the parts inside is also….

Pick up the machine and compare the weight – a heavier machine generally indicates a higher quality motor and component used – obviously this is ignoring things such as steel frames that do not form part of the motor and pump.

IN CLOSING AN IMPORTANT POINT TO KEEP IN MIND WHEN BUYING A PRESSURE WASHER

The old saying that one must “compare apples with apples” is very important and something to keep in mind.

Common sense dictates that you cannot supply something similar in quality and material at a considerably lower price.

THE LEADING CAUSES OF DAMAGE TO A HIGH PRESSURE WASHER

Number 1 - The insufficient water supply to the machine

Every high pressure washer has a water flow performance and in normal use, this is not adjustable – it is imperative that the supply to the machine is able to supply this volume per minute as a minimum.

Failure to do so will cause a machine to experience water starvation and if this is not rectified, it leads to damage of the internal working of the pump.

 

Reasons for this lack of water can be one of the following:

This can be caused by insufficient water supply to an area.

There could be too many people drawing water from the same pipe-line of water.

Check there isn’t a kink in the hose pipe supplying the machine that is restricting the water.

A tap that is accidently closed.

Number 2 - Electricity supply to the machine

The high pressure cleaner requires water and electricity (other than fuel driven motors) to operate and these are not always in close proximity to each other.

One is then required to make use of an extension lead and it is the specification of this cable that could lead to damage of a motor.

We recommend that when buying an extension cable/lead, you rather consider a 2.5mm thickness cable than the lower cost 1.5mm versions.

When using thinner cable or leads linger than 20m, one can experience a drop in voltage that occurs over the distance on the cable – you may have 230V coming from your wall plug, but the voltage reaching the machine can be considerably lower.  This reduction is voltage is not good for any electrical motor and can lead to the windings being overheated and burning out.

NOTE: It is always recommended to use a longer hose than a longer electrical lead/cable.

Number 3 – Ignoring a leaking hose or gun

The majority of machines are supplied with what we call a Total-stop that is a switch that leads to the machine being switched off when the trigger of the gun is released.  If there is a “leak” or loss of water after the pump, this could lead to a machine switching on and off continuously – failure to investigate and rectify this, leads to the machine working unnaturally causing too little water flowing though, thus no cooling effect as there is insufficient water flowing through the pump head and overall strain on electrical and mechanical components – this applies to all brands of high pressure pumps.  A few reasons that can cause this are a leaking hose O-ring that has been worn, a small hole in the hose, a hose not fastened properly, the gun mechanism becoming worn through use and the gun kit requiring replacement etc…

Number 4 – Not keeping the machine well-maintained or operator abuse

It is always preferred that users stick to a routine with regards maintenance i.e. every 3 months having basic checks done.  By attending to a worn O-ring that costs a couple of Rand, one can save thousands due to not attending to it causes considerably more expensive damage that can follow.

We place much value to training when delivering our machines and this training is important to ensure our Kränzle customers obtain maximum advantage from the features of our high pressure washers.

USING MY MACHINE

WHAT SHOULD I DO BEFORE USING MY MACHINE?

It is important to read the user manual of the machine so you are aware of the safe and correct operation of the machine.  This should be included in the box the machine was supplied with but should you require a copy, we will gladly e-mail you one in pdf format.  Contact your Kränzle branch or Dealer to request.

THERE’S WATER IN THE PRESSURE GAUGE

The Total-stop functions with a micro switch that is activated by the pump pressure when the trigger is released.  If there is a leak after the pump this will cause this pressure to drop and will automatically activate the motor to start.

 

Look for visible leaks at the hose ends and if leaking, unscrew the hose end and replace the O-ring.

If water is leaking from the inside of the gun, it is an indication that the gun-kit needs replacing.  Refer to the spares manual or contact your Kranzle branch or Dealer to supply the gun-kit for DIY or to do the repair.
Click here to view the Starlet gun repair kit

 

If the problem persists, it could be an indication that there is an internal leak and a possibility that the water seals or O-rings are worn and causing the drop in pressure.  Contact your Kranzle branch or Dealer to repair.

MACHINE IS ON BUT NOT WORKING OR TRIPS WHEN I PULL THE TRIGGER

There can be various reasons so eliminate the possible reasons by doing the following:

 

Check the power plug that you are using – is it switched on.

Plug the machine into another plug – if the machine works have the plug socket checked by a qualified electrician.

Has the power supply circuit breaker not tripped – check the distribution board.

 

The machine is equipped with a motor voltage supply protection switch that may have tripped – Switch the machine on/off switch off and then on – if this happens again when using the machine, it is a sign you may have voltage supply problems or your extension lead may be too long or too thin.  Remove lead and test.

 

The nozzle may be blocked – remove the lance from the gun and pull the trigger.  If the machine switches on and water comes out the gun you have something blocking your nozzle.

Take a paper clip and remove the particle – tap the lance to ensure the particle falls out – look through the nozzle at a light source to check if it is removed and test on machine.

 

The valves could have become stuck from sediment of water that has dried inside the pump especially if the machine has not been used for a long period of time.  Machines that are connected directly to the water supply i.e. that don’t have a water tank, should have sufficient water pressure to clear this.

 

The Total-stop piston is stuck.  Refer to the user manual.

THE MOTOR HUMMS WHEN I SWITCH THE MACHINE ON

The first thing to check is that the motor is free to turn.  Unplug the machine from the power source and use a screwdriver or similar to try and turn the fan at the back of the motor through the fan casing.  It should turn freely and if not, is a sign something has seized.

If it doesn’t turn contact your Kranzle branch or Dealer to investigate and repair.

 

If the fan turns, the starting capacitor could have failed – this is normally found when operators use the machine with an extension lead/cable.

We always recommend not using a lead AT ALL but rather use a longer high pressure hose.  If there is no other option, use one that is as short as possible with minimum wire thickness of 2,5mm

 

If the motor humms, switch off the motor and try again by squeezing of pulling the trigger when switching on the machine – this is normally good practice to do at all times.

THE HOSE VIBRATES WHEN USING

This is an indication that something has got stuck in one of the valves – remove valve caps and inspect.

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THE WATER IS COMING OUT THE LANCE ERRATICALLY

Machines equipped with a water tank usually have a built-in chemical injector with a knob to control the detergent concentration.  If this is not closed completely it allows air into the system causing the spray to be erratic and can cause damage with extended use.

 

Check the inline filter that is at the water inlet on the pump.  There is a filter than can become blocked not allowing sufficient water through.  Remove, clean and replace.  Never remove this and use the machine without it as it will then allow particle into the pump.  If the filter blocking persists, consider purchasing an additional filter from your Kranzle branch or Dealer as it is easier to clean.

WHEN SHOULD I REPLACE THE OIL

The first oil change should be carried out after approximately 50 operating hours, then every year or after 1000 operating hours.

If the oil turns grey or white it is an indication that water has got into the oil and this will negatively affect the lubrication ability of the oil.  The oil of your high pressure pump must be changed after inspecting for the reason.

Refer to the machine user manual for oil amount and type required and for filling instructions.

 

Take care to dispose of waste oil correctly.

PROCEDURE TO FOLLOW WHEN SHUTTING DOWN MY ELECTRIC HIGH PRESSURE WASHER

Switch off the machine

Turn off the water supply to the machine and remove the hose from the machine.

Open the spray gun briefly to release the pressure in the pump

Remove the high pressure hose and spray gun

Drain the pump: switch on the motor for approx. 20 seconds

Pull the plug from the socket

Wipe the high pressure hose and power cable and wind up

Clean water filter at the machine inlet

We specialise in High Pressure Cleaning Equipment!