Pump – Fire, Portable, High Pressure w/Fuel Line
Initial Inspection/Disposal Criteria
- Visually inspect for evidence of use (dust, oil, starter seal broken), damage or missing parts.
- Return to stock if there is no sign of use or damage and date last tested (DLT) does not exceed 12 months.
- Refurbish as necessary if unit has been used or fueled, damaged, or shelf life is exceeded.
- Dispose of the unit if it is not economically repairable.
- Remove dirt and oil, using detergent or degreaser as necessary.
- Use pressure washer to remove heavy deposits of oil and grease.
- Equipment should be serviced and test run as quickly as possible after pressure washing to minimize rust formation on metal parts.
- Check for loose and/or missing parts or mounting hardware; tighten or replace as needed.
- Inspect power-head (engine) for freeness of all moving parts, ensuring that the crankshaft, piston/cylinder and all engine bearings are not damaged. • Ensure over-bored Mark-3 cylinders are marked with actual size of bore
- Check condition of spark plug, air filter, and fuel filter; clean or replace as needed. • Re-oil foam air filter with “foam type” filter oil. • Replace fuel filter on Wick 375 engine at each service.
- Ensure Mark-3 carburetor shroud does not have a guard covering the high speed mixture screw. Either cut off the guard or replace carburetor shroud with a modern version without guard.
- Inspect exhaust system; make sure there are no cracks or leaks. Clean spark arrestor of excess carbon build-up, replace if screen is damaged. • Re-torque muffler bolts on Wick 375 engines to 18 lb. ft. at each service.
- Ensure all decals (operations and warning) are affixed and legible.
- Ensure “EMERGENCY RESCUE EQUIPMENT EXEMPT FROM EMISSIONS STANDARDS UNDER 40 CFR 1054.660” decal is affixed.
- Paint exposed metal on frame, cowling, and pump body.
- Check to make sure that all gaskets on the pump fittings/adapters are in place and functioning properly.
- Inspect Fuel Line Assembly, refer to the refurbishment guide for NFES #000113.
C. Test for Performance
- Pumps are tested using: 1½” suction hose at pump intake and 31/64” discharge (machined square edge orifice). The use of a full bore 1½” shut-off valve will be necessary to test for maximum pump output pressure. Grade 1A liquid filled pressure gauges with 5 PSI graduation are recommended. Table 1 and Table 2 reflect minimum output pressures for refurbishing high pressure pumps as a function of elevation. A one foot lift should be used as a standard drafting height.
|Elevation||Shut-off pressure1 (PSI)||Working pressure @ 31/64" orifice2 (PSI)|
1Based on the formula, Pressure = -0.0129 * (Elevation) + 294.24
2Based on the formula, Pressure = -0.0026 * (Elevation) + 135.27
|Elevation||Shut-off pressure3 (PSI)||Working pressure @ 31/64" orifice4 (PSI)|
3Based on the formula, Pressure = -0.0138 * (Elevation) + 334.7
4Based on the formula, Pressure = -0.0044 * (Elevation) + 148.75
- Ensure recoil starter functions properly. Check for damage or fraying of pull cord; repair or replace as necessary.
- Start pump and allow engine to warm up for two minutes.
- Ensure mechanical pump seal is not leaking, repair or replace as necessary.
- Ensure idle speed and low speed mixture screws are properly adjusted.
- Using full throttle set high speed adjustment by turning high speed mixture screw to achieve maximum engine RPM, then richen mixture screw until there is a drop in pump output pressure of 5-10 PSI (approx.).
- Engine should be responsive and accelerate quickly. •
- Ensure high speed circuit of Wick 375 will achieve an overly rich condition. If not; there is an obstruction in the inlet or the high speed circuit of carburetor, clean and repair as necessary.
- Perform shut-off pressure test at full throttle; note maximum pressure at full discharge shut-off ensuring pump output meets minimum standards as outlined in table 1 or 2 (above) depending on pump model.
- Perform pressure test with the 31/64” square edge orifice at full throttle; note working flow pressure, ensuring pump output meets minimum standards as outlined in table 1 or 2 (above) depending on pump model.
- Use loss of prime method to test over-speed protection cut-out switch, adjust as necessary to manufacturer specification.
- Should any function fail a test, refer to the manufacturer’s repair manual and troubleshooting guide to correct the problem
- Allow engine to cool down for one minute at idle.
- Remove fuel source and run engine until carburetor is completely empty of fuel
- Remove all water from pump end.
- Lubricate pump head bearing with specified grease. If pump head is fitted with a sealed shaft bearing; ensure that the pump housing is marked/ labeled appropriately.
- Use nylon “zip-tie” to tie off (seal) starter rope to the frame.
- Attach certification tag that indicates date last tested (DLT), property #, and name of individual certifying performance.
- Ensure that all identification (property #, serial #, owner ID) is affixed and legible.