TM 5-3895-363-13&P
11.3.5 Output Test:
Activate pump lever (P) for 20 strokes,
stroking about once every second. Mea-
sure the output with a cc Burette. Repeat
.
test a minimum of three times.
11.3.6 Output Test Result More Than 50cc:
11.3.6.1 Observe nozzle for dripping fuel when
pump is idle. If dripping, check for:
A.) Damaged buna cone (I)
B.) Weak valve spring (K), see 2.8.4
C.) Valve body damaged beneath buna
cone (I).
11.3.6.2 Excessive stroke caused by incorrect
gauge washer or lack of washer (see 4.3).
11.3.7
Output Test Result Less Than 47cc:
11.3.7.1 Air in system (see 8.2 and 8.3).
11.3.7.2 Improper return of element piston (D).
Look for damage between the shaft and the
inside of the locking nut (C).
11.3.7.3 Check to see if locking pin in element pis-
ton (D) has worked out, preventing
movement in locking nut (C).
11.3.7.4 Leakage out top of pump. Check O-ring
(G) for damage.
11.3.7.5 Master control lever improperly positioned
(see 8.3.12).
NOTE:
A worn pump lever (P), pump lever pin (N), and/or
top of piston assembly (D) will not affect output of
bench test, but will affect actual output when ma-
chine is in operation.
Figure 36
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