Wacker Neuson WM 130, Repair Manual

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Sub Systems WM 130/170/270 Repair
wc_tx000382gb.fm
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10.4 Carburetor Overhaul
See Graphic: wc_gr001829
Throttle System
• When the throttle stop screw (26) is removed, the spring (25) can be
removed.
• Remove the screw (22) and the throttle valve (23), then take out the
throttle shaft (24). When removing the throttle valve, take care not to
damage the valve edge.
Choke System
• Remove the choke valve (14). Then pull out the choke shaft (13).
• When reassembling the choke shaft, be sure to position the cutout on
the choke valve facing the pilot air jet.
Pilot System
• Remove the pilot jet (18). Use the correct tool so as to avoid damag-
ing the jet.
• When reassembling the pilot jet, be sure to firmly tighten it, otherwise
fuel may leak, leading to engine malfunction.
Main System
• Remove the bolt (8) and remove the float chamber body (5).
• Remove the main jet (11) from the body (1).
• Remove the main nozzle (2) from the body (1) (WM 270).
• When reassembling the main system, be sure to fasten the main jet
and main nozzle to the body, otherwise the fuel concentration in the
fuel/air mixture may become too rich, leading to engine malfunction.
• The tightening torque of the bolt (8) is 9 Nm (6.5 ft.lbs.). Do not forget
to mount the washer.
Float System
• Remove the float pin (10) and then remove the float (4) and the nee-
dle valve (12). Use care when reassembling.
• Do not use a drill or similar objects for cleaning the jets; use com-
pressed air instead.
• The float pin is pressed into the carburetor body. When removing the
needle valve, use a tool slimmer than the float pin. Tap the reverse
side gently and remove.