The pump is fitted with a flapper (check) valve to prevent water from completely draining from the
suction line. Any damage to the flapper face or seat will allow the suction line to drain each time the pump is
stopped, and debris or dirt on the face or seat will also allow the suction line to drain.
The drive spline is a precision unit for transmitting power of the engine to the pump shaft. Dirt,
dust, or rust can impair the serviceability of the drive spline and coupling unit.
Frequent running of the unit for short periods of time does not allow the alternator to keep the
battery at full strength.
During operation observe for leaks and any unusual noise or vibration.
DAILY PREVENTIVE MAINTENANCE SERVICES - Items 1 through 8, illustrated on Fig. 3-1, list the daily
maintenance services which must be performed by the operator.
QUARTERLY PREVENTIVE MAINTENANCE SERVICES - Items 1 through 15, illustrated on Fig. 3-1, list the
maintenance services which must be performed by the operator at quarterly intervals. A quarterly interval is equal to 3
calendar months or 250 hours of operation, whichever occurs first.
FIGURE 3-1. PREVENTIVE MAINTENANCE SERVICES