4-11. Quarterly Preventive Maintenance Checks
Table 4-1 lists the checks and services which
must be performed quarterly. Figure 4-5 illustrates
the items to be inspected in sequence.
Table 4-1. Organizational Preventive Maintenance Checks and Services Quarterly Schedule
t r o l
b l y
Check for and have Repaired
Replaced, Adjusted as necessary
Check exterior parts for cracks and
leaks. Check for missing or damaged
gaskets, dust plug and dust cap.
Check the pressure control for proper
operation. Test the pilot valve; the
correct shutoff pressure is from 4 to 5
psi (0.3 to 0.4 kg/sq cm) (para 4-22).
Check closure plates for cracks; check
exterior of drums for cuts, wear, ex-
posed fabrics or evdence of leaks.
Check hose for cuts, leaks, and
deterioration. Check coupling halves
for cracks, leaks and damaged or
missing gasket. Check dust cap and
dust plug for cracks, breaks, and
damaged or missing chain and key
Check handwheel for leaks or
damage. Check coupler valve
assembly for cracks, leaks, and
damaged or missing gaskets. Check
adapter for cracks and damaged
For Readiness Reporting,
Equipment is Not Ready/
4 - 9