Stihl TS 700, TS 800 - 12.3.4 Pump Diaphragm Replacement

71TS 700, TS 800
The diaphragm material is
subjected to continuous alternating
stresses and eventually shows
signs of fatigue. In other words, the
diaphragm distorts and swells and
must be replaced.
– Examine the metering diaphragm
for signs of damage and wear,
replace the gasket.
: Note the order in which the
metering diaphragm (2) and
gasket (1) are installed.
1
2
376RA267 TG
: Position the metering diaphragm
(2) and gasket (1) on the pegs (3)
of the carburetor.
– Reassemble remaining parts in
reverse order, tightening torques,
b 3.6
1
2
3
376RA268 TG
– Remove the metering
diaphragm, b 12.3.1
: Undo screw (arrow).
376RA269 TG
: Pull the inlet control lever (1) with
spindle out of the groove in the
inlet needle.
Note:
The spring under the inlet control
lever may pop out.
1
376RA270 TG
: Pull out the inlet needle (arrow).
376RA271 TG
: The sealing cone of the inlet
needle must be replaced if a
circular indentation (arrow) is
visible on its tip.
VA
212RA281
– Fit the inlet needle (1).
– Fit spring (2) in bore.
: Insert spindle (3) in the inlet
control lever (4).
– Engage the clevis on the inlet
4
1
3
2
376RA273 TG
control lever (4) in the groove on
the inlet needle (1).
Ensure that the spring locates on
the nipple (arrow) of the control
lever (4).
– Press the inlet control lever (4)
down and secure it with the
screw.
– Check that the inlet control lever
(4) moves easily.
– Install the metering diaphragm,
b 12.3.1
12.3.2 Inlet needle