SuperFlow SF- 902S - SF-902 S Absorber Maintenance

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6.0 Maintenance
• Post safety warnings and barricade work
area to prevent unauthorized use of the
dynamometer before maintenance has been
completed.
• Only qualied machine operators and
maintenance personnel should perform the
procedures covered in this manual.
!
WARNING
6.2 SF-902S Maintenance
The absorber requires very little maintenance. Follow the suggestions below to increase the life and
reliability of your absorber.
Water Filters
Contaminated water can reduce the life of an absorber and increase maintenance cost. Clean the lter on
the input to the absorber after every 50 hours of operation and change when needed. Signs of a clogged
lter is if the absorber cannot hold a load at the upper end of an acceleration test. A replacement lter can
be ordered through SuperFlow Customer Service, part number 4500P-5060.
Change and clean lters on the water supply line to the dyno according to the manufacturer’s
recommendations. An indication of a defective supply lter is when the water supply cannot maintain a full
sump tank.
Automatic Water Fill Valve
The black plastic valve on the main inlet to the water tank controls the water ow to the dynamometer tank.
The tank level is set with the oat valve inside the tank. The tank can possibly overow the rst time it is
lled but should not happen again after the automatic valve is primed. The control valve rarely fails to work
properly, but if it does, it is because debris is trapped under the diaphragm in this valve or the oat valve
does not shut o󰀨 properly.
The handle controls how fast water bleeds from one side of the diaphragm to the other and therefore
controls how fast the valve turns on and o󰀨. This is usually left wide open for the fastest response and
should not require adjustment, but it can be adjusted if necessary.
If the water does not shut o󰀨 completely or almost completely (just a couple drops per second at worst),
check the oat and the diaphragm before ordering a replacement valve because it is unlikely the entire
valve is faulty. Usually the oat valve is not shutting o󰀨 completely because of debris in the orice or the
oat is not set properly.
1. Check the oat valve in the tank to make sure it is being pushed up far enough to close. If necessary,
bend the rod on the oat until the valve shuts o󰀨.
2. If the valve still does not shut o󰀨, remove the eight bolts that secure the top of the black valve, and
remove the cover and the diaphragm from inside.
AUTOMATIC STARTING HAZARD.
An engine connected to
dynamometer could be started
remotely. Ensure starting has been
disabled prior to servicing.
!
WARNING