TILLOTSON HU Series, Руководство по обслуживанию

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7
Carburetor Floods
1. Dirt or foreign particles preventing inlet
needle from seating.
2. Diaphragm lever spring not seated on
lever dimple.
3. Diaphragm improperly installed in
carburetor.
Engine Will Not Accelerate.
1. Idle mixture too lean.
2. Incorrect setting on diaphragm lever.
3. Diaphragm cover plate loose.
4. Diaphragm gasket leaking.
5. Main fuel orifice plugged.
Engine Will Not Idle
1. Incorrect idle adjustment.
2. Idle discharge ports or channels clogged.
3. Diaphragm lever set incorrectly.
4. Throttle shutter cocked in the throttle bore
causing fast idle.
5. Dirty nozzle check valve or outlet screen.
6.
Welch plug covering the idle discharge
ports does not seal. This causes the
engine to idle with idle mixture screw shut
off.
Engine Runs Out Lean
1. Tank vent not operating correctly.
2.
Leak in fuel system from tank to pump
3.
Ruptured fuel pump diaphragm
.
4. Main fuel orifice plugged.
Carburetor Runs Rich with High Speed
Mixture Screw Shut Off
1. The 3/6” diameter nozzle cup plug, nozzle
check valve cage, is not sealing.
Remove, clean and replace.
Remove, lever and reinstall
Replace diaphragm or correct installation.
Readjust
Reset
Tighten
Replace
Remove diaphragm cover, diaphragm,
diaphragm lever and high speed mixture
screw. Clean out orifice by blowing through
high speed mixture screw threaded hole.
Reset to best idle.
Blow out with compressed air, or, if compressed air
is not available, clean and flush with gasoline.
Reset diaphragm lever so it is flush with the
floor of the diaphragm chamber.
Reset
Clean or replace
Replace welch plug, following instructions outlined
in service hints.
Clean, if possible, or replace
Tighten or replace fittings or line
Replace
Clean
Install new plug or new cage
TROUBLE SHOOTING
Set engine idling speed in accordance with engine manufacturer's recommendation.