Stihl TS 500i - Leak Testing; Checking the Fuel Tank; Fuel System

102 TS 500i
11.6 Leak testing
11.6.1 Checking the fuel tank /
fuel system
On testing the fuel system under
pressure using the pressure testing
tool 5910 890 4100, a quick first test
can be carried out.
– Open the filler cap and drain the
fuel tank in accordance with
regulations, b 1
– Close the filler cap
– Remove the shroud, b 6.4
– Remove the control unit, b 7.3
– Remove the air filter, b 11.1
– Remove the tank vent, b 11.6.3
: Push the hoses (1)
1127 358 7600 onto connecting
element (2) 5910 895 0200
1307RA199 TG
2 11
1
– Coat O-ring on the plug with
STIHL press fluid, b 13
: Press the plug (1) of the pressure
testing tool 5910 890 4100 as far
as it will go into the hole (arrow)
– Pull injection pump from the
guide
: Push hoses (1) 1127 358 7600
onto the plug (2) of the pressure
testing tool 5910 890 4100 and
injection pump (3)
1
1307RA370 TG
1307RA371 TG
1
2
3
1
: Slide ring (1) to the right and
connect the pump (2)
0000 850 1300 to the hose
– Build up gauge pressure in the
fuel tank
Actuate the pump until the pressure
gauge shows a pressure of 0.8 bar.
If this pressure remains constant for
at least 20 seconds, the tank is
airtight. If the pressure drops, the
leak must be located and the faulty
part replaced.
– After testing, slide the ring on the
pump to the left to vent the pump
– disconnect the hose.
– Remove pressure testing tool
– If the fuel tank is airtight, continue
with tank vent test, b 11.6.2
– Fit air filter, b 11.1
– Reassemble remaining parts in
reverse order
1307RA369 TG
1
2