TM 55-1945-205-24-2
0325 00 2
0325 00
WARNING
3.
Conduct fuel inlet vacuum tests on the VRO pump (1).
a.
Position a wiping rag under VRO pump (1) to capture residual fuel in fuel hoses during removal.
b.
Remove fuel inlet hose (2) from lower engine cover inlet fitting (3) by loosening hose clamp (4).
c.
Connect an 8 in. piece of clear vinyl hose (5) to lower engine cover inlet fitting (3), securing in place with a
hose clamp (4).
d.
Install a vacuum gage with tubing and t-fitting (6) between vinyl hose (5) and fuel inlet hose (2), securing in
place with hose clamps (7).
e.
Start the RHIB engine and run at full throttle (5000 - 6000 RPM) for at least two minutes.
(TM 55-1945-205-10-2)
f.
Visually inspect vinyl hose (5) to verify no air or bubbles are in the line.
g.
Verify vacuum gage reading to be 4 in. Hg or less.
h.
Shutdown RHIB engine. (TM 55-1945-205-10-2)
i.
If the vacuum gage reading was 4 in. Hg or less and no air bubbles were present, remove vinyl hose (5) and
vacuum gage with tubing and t-fitting (6).
j.
Connect fuel inlet hose (2) to lower engine cover inlet fitting (3), securing with clamp (4) and conduct the
fuel outlet pressure test on VRO pump (1) per step 4.
7
6
5
4
2
7
7
TO LOWER ENGINE COVER INLET
1
3
