Figure 11-5. Fabrication of muffler cleaning tool.
c. Maintenance Repair Parts.
Repair parts and
from rear end of spark plug while pulling
starter handle (this may require two
equipment covering organizational maintenance for the
men) If sparks do not jump, the trouble
liquid loading system are listed and illustrated in TM 5-
is in the electrical system. (Report this
condition to direct support maintenance.)
If sparks jump, replace spark plug. If
Preventive Maintenance Checks and
this does not correct the problem, the
trouble is in the fuel system. Check fuel
a. General. Insure that the liquid loading system is
lines, fuel tank, and carburetor.
ready for operation at all times. Inspect the equipment
systematically so that defects may be discovered and
Maintenance of Liquid Loading System
corrected before they result in serious damage or failure.
a. General. Instructions in this paragraph are to
Perform necessary preventive maintenance checks and
inform and guide organizational maintenance personnel
services listed in step b, following. Item numbers
in maintaining the liquid loading system.
indicate the sequence of minimum inspection
b. Spark Plug Service.
(1) A fouled or dirty spark plug which has
b. Organizational Preventive Maintenance Checks
caused trouble will often prove serviceable after it has
been thoroughly cleaned, washed, and properly gapped.
maintenance checks and services applicable to
c. Troubleshooting Chart. Table 11-4 contains a
tabulation of troubleshooting activities pertinent to
When setting spark plug gap be sure
organizational maintenance. The chart serves only as a
not to damage electrodes or
guide and does not preclude the possibility of other
(2) Service spark plug as follows:
(a) Carefully unscrew spark plug (HI-
A quick check of pump condition for
tension) lead (43, 11-15) from end of spark plug (41, fig.
a 3/4-inch open end wrench.
disconnect shielded ignition cable from
(b) Using a 13/16-inch deep socket
spark plug and hold end of the cable
wrench, remove the spark plug and gasket (41 and 42).
approximately /4 inch