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14 Troubleshooting
13.2
SG 51 Specifications
Working pressure, max.:
Flow volume, max.:
Solution capacity, max.:
Operating temperature, max.:
Residual solution in tank:
Recoil force:
Dry weight:
14 Troubleshooting
Before starting, spray the unit empty until the pressure has been completely relieved - when working
on the unit, liquid may splash out uncontrollably if the pressure is not released.
After the work, carry out a test run with clear water.
Fault
Pressure gauge does not
show the container pressure
Pumping action produces no
pressure. Lever is remarkably
easy to operate
Lever blocked or difficult to
move down
Tool only sprays when pump‐
ing
Nozzle does not spray – pres‐
sure in unit OK
Liquid drips from the nozzle
Jet only – no atomization
1)
STIHL recommends STIHL servicing dealers
15 Maintenance and Repairs
Users of this machine may only carry out the
maintenance and service work described in this
user manual. All other repairs must be carried
out by a servicing dealer.
STIHL recommends that you have servicing and
repair work carried out exclusively by an author‐
ized STIHL servicing dealer. STIHL dealers are
regularly given the opportunity to attend training
courses and are supplied with the necessary
technical information.
When repairing the machine, only use replace‐
ment parts which have been approved by STIHL
for this power tool or are technically identical.
Only use high-quality replacement parts in order
to avoid the risk of accidents and damage to the
machine.
STIHL recommends the use of original STIHL
replacement parts.
Original STIHL parts can be identified by the
STIHL part number, the { logo and the
0458-597-0121-C
6 bar
1.4 l/min
12 l
40°C
<0.25 l
<20 N
4.5 kg
Cause
Pressure gauge defective
Pump tube damaged
Valve disc damaged
Piston packing damaged
Piston packing not greased
Nozzle / swirl insert / filter blocked
Pressure vessel fully filled with liq‐
uid
Nozzle / swirl insert / filter blocked
Nozzle / swirl insert / filter blocked
Swirl insert on the nozzle missing
Nozzle fouled
13.3
SG 71 Specifications
Working pressure, max.:
Flow volume, max.:
Solution capacity, max.:
Operating temperature, max.:
Residual solution in tank:
Recoil force:
Dry weight:
Remedy
Replace pressure gauge
Replace pump tube
Replace valve discs
Replace piston packing
Grease piston packing
Clean nozzle / swirl insert / filter
Pump the unit completely empty.
Repeat after 5 fillings at the lat‐
est
Clean nozzle / swirl insert / filter
Clean nozzle / swirl insert / filter
Insert swirl insert into nozzle
Cleaning the nozzle
STIHL parts symbol K (the symbol may appear
alone on small parts).
16 Disposal
Contact the local authorities or your STIHL serv‐
icing dealer for information on disposal.
Improper disposal can be harmful to health and
pollute the environment.
► Take STIHL products including packaging to a
suitable collection point for recycling in accord‐
ance with local regulations.
English
6 bar
1.4 l/min
18 l
40°C
<0.27 l
<20 N
4.8 kg
1)
1)
13
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