Manual Stihl RE 551 (page 54 of 284) (English, German, Dutch, French, Italian, Portuguese, Spanish)

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RE 521, RE 551 PLUS, RE 581, RE 581 PLUS

English

N Unscrew cap from detergent

container

N Fill detergent tank with STIHL

detergent diluted as specified –

STIHL recommends using STIHL

detergent

N Screw cover with intake hose onto

detergent container

The cap has a standard thread and fits

all standard detergent containers.

N Use the detergent metering knob to

adjust the amount of detergent to be

added – as shown in picture

N When applying detergent, start at

the bottom and work upwards

To achieve a better result, spray the

detergent on the dry surface and let it sit

for a few minutes.

Detergent must not be allowed to dry on

the object to be cleaned.

Rinse detergent system

If detergent is no longer to be added:

N Turn the detergent metering knob to

the left as far as it will go to

0 % (min)

N Let the high-pressure cleaner

continue to run with the spray gun

open until no more detergent comes

out of the nozzle

Precisely calculating/setting the

detergent concentration

For a few detergents, the concentration

must be very precisely set. In this case,

measure the water flow and detergent

consumption.

N Set the detergent metering knob to

"0" % (min)

N Hold the spray gun in a suitable

empty receptacle (> 20 l) and

actuate for exactly 1 minute

N Measure the quantity of water "Q" in

the container

N Fill 2 liters of detergent diluted as

directed into a suitable container

(with a scale of 0.1 l) – STIHL

recommends the use of genuine

STIHL detergents

N Hold the intake hose in the

container

N Set the detergent metering knob to

the desired concentration: 0 %

(min) to 5 % (max)

N Hold the spray gun in a suitable

empty receptacle (> 20 l) and

actuate for exactly 1 minute

N Read the detergent consumption

"QR" on the scale

Calculating the actual detergent

concentration:

– QR = amount of consumed

detergent (in l/min)

– Q = Water without detergent

(in l/min)

– V = Predilution of detergent (in %)

If the actual concentration deviates from

the desired concentration, reset knob

and repeat measurement if necessary.

Calculating the predilution of the

detergent in %

If the predilution is not indicated as a

percentage, it can be calculated using

the following table:

Adding detergent

Detergent metering knob

to the left: 0 % (min)

Detergent metering knob

to the right: 5 % (max)

x V = concentration

Ratio

1:1 = 50 %

1:2 = 33.3 %

1:3 = 25 %

1:5 = 16.6 %

1:10 = 9 %

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Stihl RE 551 Manual

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