Table 11-4. Organizational Troubleshooting Chart - Liquid Loading System (Continued).
Malfunction
Probable cause
Corrective action
a. Ball valve closed.
a. Open ball valve.
5. No fluid being pumped.
b. Pump not primed.
b. Prime pump.
c. Inlet strainer clogged.
c. Remove and clean or replace strainer
screen (11-5b).
d. Fluid source empty or inlet pipe clogged. d. Check fluid source for cause.
e. Leaks in suction hose or couplings.
e. Inspect and repair or replace hose or
couplings.
f. Pump faulty.
f. Repair pump (report to direct support
maintenance).
a. Inlet strainer clogged.
a. Remove and clean or replace strainer
6. Restricted fluid flow.
screen (11-5b).
b. Fluid source low or inlet pipe clogged.
b. Check fluid source for cause.
c. Leaks in suction hose or couplings.
c. Inspect and repair or replace hose or
couplings.
d. Pump faulty or engine not up to speed
d. Repair pump (report to direct support
or power.
maintenance).
(c) Inspect the spark plug and clean or
plug when installing. Check to see that terminal end of
ignition wire (43) is fully inserted in spark plug boot.
replace as necessary. Replace spark plug and gasket
c. Muffler Service.
after 100 hours of operation or if cleaning and regapping
(1) Loosen screw of muffler strap (21, fig. 11-
the plug does not return it to serviceable condition.
(d) Clean the spark plug by wire-brushing and
22). Remove muffler strap from muffler (20) and muffler
bracket (22).
by digging out carbon around the insulator with a sharp
(2) Loosen locknut on inlet of muffler (20) and
instrument.
(e) Using a 0.035-inch feeler gage, set the
unscrew muffler from exhaust manifold (40, fig. 11-20).
(3) Using a scriber or the fabricated muffler
spark plug gap.
cleaning tool (fig. 11-5), clean out all of the perforations
(f) Place gasket (42, fig. 11-20) over spark
of the muffler by inserting the tool into each end and
plug threads, and install spark plug. Tighten spark plug
picking out carbon deposits (fig. 11-6).
to a torque of 250 to 300 lb-in. using a 13/16-inch deep
Note:
socket and torque wrench.
It is necessary to clean from both ends
(g) Replace spark plug lead (43, fig. 11-15)
because of the solid baffle in the center
using a 3/4-inch open end wrench over end terminal of
of the muffler.
spark plug. Make sure plug lead is fully installed and that
no dirt is trapped in spark
11-10
