Stihl RB 302, Instruction Manual

Page: 29 / 180

RB 302, RB 402 PLUS
English
27
Before starting any work on the machine, switch off the engine, turn off the water supply and actuate the spray gun until the pres
-
sure has been relieved.
Fault
Cause Remedy
Pressure fluctuates or drops Pump partly frozen Thaw out machine
Pump draws in air (suction mode only) Check air-tightness of suction set, vent sys -
tem by actuating the spray gun several
times at short intervals
High-pressure pump is leaky, valves are
defective
Have the machine checked by a servicing
dealer
2)
Water temperature too high Permissible water temperature – see
“Specifications”
Pressure is too high Engine speed control not set correctly or
defective
Have the machine checked by a servicing
dealer
2)
Engine stops Shortage of oil in engine Add oil
1)
No supply of detergents Detergent tank is empty Fill detergent tank
Detergent intake is clogged Eliminate clog
Injector is soiled or suction hose is clogged Clean injector – see “Maintenance”, remove
blockage in suction hose
Sleeve on spray lance not set to low-pressure
operation
Turn sleeve counterclockwise as far as pos -
sible – see “Adding detergent”
1)
See engine instruction manual
2)
STIHL recommends STIHL servicing dealers