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 TM 55-1905-217-34
Figure 3-10. Setting comparator stroke counter.
(b) Place the injector (fig. 3-11) in the comparator (fig. 3-12), seal firmly and check injector fuel
output as follows:
1. Pull control rack (6, fig. 3-11) out to the NO FUEL position and start the comparator
on switch (fig. 3-12). After the comparator has started, push injector rack to FULL FUEL
position.
2. Run the injector for 30 seconds to purge all air that may be in system. Press fuel
flow start bottom to start flow of fuel into vial. The comparator will automatically stop fuel flow
after 1000 strokes.
3. After fuel stops flowing into vial, pull the rack out to the NO FUEL position, turn off
the comparator, reset the counter and observe the vial reading.
4. If the injector fuel output in the vial does not fall within a minimum of 30cc (cubic
centimeters) or maximum of 36cc, the injector is defective and must be repaired.
3-12
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