60
3. Make sure the rubber seals inside are not torn or damaged and that no debris is in the sealing area. If
everything checks out, reassemble it.
Replacing the valve requires removing many of the fittings from the aluminum coupler and then removing
the tank from the stand because the black valve cannot be spun off with the tank on the floor. It is
acceptable to let the water overflow the inside divider (as long as the excessive water usage is not a
problem) to allow the dyno to keep running until the replacement arrives.
Fuel Filters
SuperFlow’s high-capacity fuel pump system also has high-sufficiency filtration capabilities. The end result
is that regularly cleaning the fuel filter is necessary to ensure consistent fuel delivery. Signs of a clogged
fuel filter are slow priming times for the pump and decreased fuel-handling capacity during operation. The
fuel system’s filtration factor is determined by its 40-micron (0.0015-inch) capacity filter. This high-capacity
filter traps grit, rust, flakes, lint, animal hair, and insect parts. If you are not testing with highly filtered fuel,
your fuel system will catch a large quantity of contaminants you may not realize are even present.
To clean the system, remove the filter screen assembly from its canister and wash it using a parts- washing
solvent. Never clean it with carburetor cleaner.
After cleaning the filter, blow the cleaning solution and any remaining particles off the screen using an air
hose. Hold the nozzle of the hose at a 45-degree angle and blow air from the outside toward the inside of
the filter element.
Depending on the source of your fuel, regular cleaning schedules will vary. At the outset, SuperFlow
recommends cleaning the filter weekly. After that it should be cleaned after every 50 hours of dynamometer
operation or every 3 months, whichever comes first.
Speed Pickup
A magnetic pickup is used to measure the speed of the absorber. A damaged pickup can cause erratic
engine rpm readings and can cause the engine to “run away” during automatic testing. In most cases no
maintenance is required on the pickup. However, check it when experiencing problems with rpm readings.
On an SF-871 absorber the air gap between the pickup and the tach gear is set at 0.03 in (0.75 mm).
6.0 Maintenance
