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Page Title:
Table 4-1. Preventive Maintenance Checks and Services |
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 Table 4-1. Preventive Maintenance Checks and Services
Organizational Maintenance Category
Quarterly Schedule
Paragraph
Sequence
Item to be
Procedures
number
reference
inspected
Drain and refill tank if fuel is dirty or
1
Fuel tank
See paragraphs 4-10 through 4-
contaminated. Replace fuel tank if
12 for fuel tank replacement.
interior is rusted or corroded, or if
tank leaks or is severely dented.
2
Check for contamination. Make sure
Oil in pump gear case
See current L.O.
oil was changed at recommended
interval.
Tighten loose hardware. Replace
Engine mounting
See figure 5-1.
3
missing hardware.
Check for dirt and water in bowl.
4
Fuel strainer
See paragraph 3-9.
Replace strainer if damaged.
Replace damaged fuel lines and
See paragraphs 4-10 through 4-
5
Fuel line and fittings
12.
fittings.
See paragraph 2-1 b ( 4).
6
Use starting rope to check for free
Pump rotation
r o t a t i o n . Determine cause of
binding and repair or report to
direct support maintenance.
See paragraphs 4-18 through 4-
7
Check for cracks, tears, holes, and
Pump diaphragm
20.
leaks. Replace if damaged.
8
See paragraphs 4-14 through 4-
Remove valves and check for free
Suction
and
discharge
16 for parts replacement.
movement and for proper seating.
assembly
Replace defective parts.
See paragraphs 4-18 through 4-
9
Plunger rod and bearings
Replace parts if play is excessive, or
20.
parts are distorted or damaged.
10
Wheels and axle
See paragraphs 4-22 through 4
Repair or replace damaged parts if
24.
wheels fail to roll easily.
11
Hoses
See paragraph 2-1 b (7).
Replace hoses if cut, punctured, or
abraded, or if fittings are damaged.
12
Water leaks
Tighten fittings and hardware to
correct leaks. Replace gaskets if
necessary.
Section IV. TROUBLESHOOTING
4-7. G e n e r a l
malfunction, report the trouble to direct support
m a i n t e n a n c e . Refer to TM 5-2805-257-14- for
This section describes troubles which might occur
troubles that relate solely to the engine.
during operation of the reciprocating pump, along
with the probable causes and corrective actions
Organizational M a i n t e n a n c e T r o u -
relating to the troubles. Only those malfunctions
bleshooting Chart.
which are within the scope of organizational
Refer to table 4-2 for troubleshooting which is
maintenance are included in this chart. If corrective
allocated to the organizational level of main-
actions given in this chart do not correct the
tenance.
Corrective action
Malfunction
Probable cause
a. Fuel line clogged.
a. Clear or replace fuel line.
1. Engine fails to start
b. Fuel filter element clogged.
b. Replace fuel filter element.
a. Defective suction or discharge
2. Engine starts but pump fails to
valve.
through 4-1 6).
pump.
b. Defective diaphragm.
through 4-20 ).
c. Cracked diaphragm pot.
c. Replace diaphragm pot (para
through 4-20 ).
a. Suction or discharge valve not
3. Pump fails to produce rated
through 4-1 6).
output.
seating properly.
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