SuperFlow SF- 902S - Fuel Filters; Speed Pickup

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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 ttings from the aluminum coupler and then removing
the tank from the stand because the black valve cannot be spun o󰀨 with the tank on the oor. It is
acceptable to let the water overow 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-su󰀩ciency ltration capabilities. The end result
is that regularly cleaning the fuel lter is necessary to ensure consistent fuel delivery. Signs of a clogged
fuel lter are slow priming times for the pump and decreased fuel-handling capacity during operation. The
fuel system’s ltration factor is determined by its 40-micron (0.0015-inch) capacity lter. This high-capacity
lter traps grit, rust, akes, lint, animal hair, and insect parts. If you are not testing with highly ltered fuel,
your fuel system will catch a large quantity of contaminants you may not realize are even present.
To clean the system, remove the lter screen assembly from its canister and wash it using a parts- washing
solvent. Never clean it with carburetor cleaner.
After cleaning the lter, blow the cleaning solution and any remaining particles o󰀨 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 lter element.
Depending on the source of your fuel, regular cleaning schedules will vary. At the outset, SuperFlow
recommends cleaning the lter weekly. After that it should be cleaned after every 50 hours of dynamometer
operation or every 3 months, whichever comes rst.
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