TM 5-2420-230-24-2
Section 6 - Injectors - Group 06
Fuel Transfer Pump - Cleaning and Inspecting
B Series Shop Manual
Page 6-13
Chatter Test
The chatter test indicates the ability of the needle valve to move freely and correctly atomize the fuel. You should
hear the valve open and should see a well atomized spray pattern.
Used nozzles should not be evaluated for chatter at lower speeds. A used nozzle can generally be used if it passes
the leakage test, chatters audibly at high lever speeds and uniformly atomizes the fuel.
Fuel Transfer Pump - Cleaning and
Inspecting
Visually inspect the fuel transfer pump for obvious cracks
or damage that would prohibit reuse. Inspect the weep
hole area for signs of fuel leakage.
Clean the pump in mineral spirits. Blow dry with com-
pressed air.
Inspect the camshaft lever and the return spring for ex-
cessive wear.
L-367