Carburetor; Leakage Testing; 10.2.2 Removal And Installation - Stihl TS 400 Manual

STIHL TS 400
10.2

Carburetor

10.2.1

Leakage testing

Refer to the manual "Trouble-
shooting, standard repairs" for
troubleshooting procedures.
The carburetor can be tested for
leaks with the aid of the carburetor /
crankcase tester.
- Remove shroud, see 5.5.
• Press fuel hose off elbow
connector.
• Slide fuel line (1) onto connector (2).
• Push fuel line (1) onto the elbow
connector using connector (2) as
adapter between tester (3) and
carburetor.
• Fit pressure hose (4) of tester onto
connector.
• Close venting screw (5) on rubber
bulb (6) and pump air into the
carburetor until an excess pressure
of approx. 0.8 bar is indicated on the
pressure gauge.
There are no leaks in the carburetor if
this pressure is maintained. If it drops,
however, this is primarily due to two
reasons:
1. The inlet needle valve is not
sealed (impurities in valve seat,
cone of inlet needle damaged or
inlet control lever jammed).
2. Metering diaphragm damaged.
In both cases, the carburetor must be
repaired, refer to the "Carburetor"
manual.
- After testing, open the venting screw
and disconnect the fuel line from the
elbow connector.
- Connect fuel line to elbow connector
of carburetor.
- Install shroud, see 5.5.

10.2.2 Removal and installation

- Remove shroud, see 5.5.
- Remove air filter, see 10.1.
• Press fuel hose off elbow
connector.
• Disconnect compensating hose
from elbow connector.
Note: The mechanical design and
function of the compensator are
described in the "Carburetor" manual.
• Unhook throttle rod from throttle
shaft and remove it.
41