Pump Diaphragm - Stihl BR 500 Service Manual

4
2
Install in the reverse sequence.
: Fit the inlet needle (1).
: Place the helical spring (2) in the
bore.
: Insert the spindle (3) in the inlet
control levers (4).
– Engage clevis in annular groove
on head of the inlet needle.
– Push the inlet control lever down
and secure in position with the
screw.
Make sure the helical spring locates
on the control lever's nipple.
– Check that the inlet control lever
moves freely.
The upper edge of the inlet control
lever must be flush with the top of
the carburetor body.
– Install the metering diaphragm,
b 6.3.1
Install all other parts in the reverse
sequence.
22
6.3.3

Pump Diaphragm

1
3
1
– Remove the carburetor, b 6.2.2
: Take out the screws (arrows)
: Remove the end cover (1).
1
2
: Remove the spring (1).
: Remove the washer (2).
2 1
: Remove the gasket (1) with pump
diaphragm (2).
– Carefully separate the diaphragm
and gasket.
– Inspect the diaphragm for
damage and wear, fit a new
gasket.
1
: Remove the pump cover (1).
2 1
: Remove the gasket (1) with pump
diaphragm (2).
BR 500, BR 550, BR 600