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Troubleshooting 43
DISASSEMBLY
Refer to figure 4 for proper parts placement. Re-
move the three nuts holding the two flowmeter
halves together.
Carefully pull the two halves straight apart, if
flowmeter is not pulled apart straight, damage to
bushings and shaft may result.
Remove any chemical or rust residue. Flush thor-
oughly with water. NOT WITH DIESEL FUEL.
TURBINE - Inspect the turbine and shaft for dam-
age or excessive wear.
BUSHINGS - Inspect the two graphite bushings.
The inside diameter should not be oval.
BEARINGS - Inspect the two sapphire end bear-
ings. Cracked bearings should be replaced. These
“glass” bearings are held in place by the “pressed
in” graphite bushings.
To replace a bushing or bearing, gently insert by
hand a #6 sheet metal screw into the graphite
bushing and pull.
NOTE: Damage may result to the sapphire
bearing if the screw is inserted too far.
Do not reuse graphite bushings after removal. Use
new bushings.
O-RING - Some chemicals may slightly deform the
o-ring. Replace if necessary.
ASSEMBLY
Place the turbine and o-ring into the housing half
without the sensor, with magnet end of the turbine
showing.
Carefully mate the flowmeter halves together. In-
stall the three 1/4 inch stainless steel screws.
IMPORTANT: Torque the three 1/4 inch ny-
lock nuts equally to 8.3 foot pounds (100 inch
pounds).
The turbine should spin freely when a very small
amount of air is directed into the flowmeter.
FLOWMETER CALIBRATION TEST
All flowmeters are factory calibrated and should
measure GALLONS with at least 98% accuracy.
If you feel the flowmeter is inaccurate and would
like to test it, you may do so using the following
procedure and test setup.
A. Enter Setup/Calibration Mode. Plug the flow
meter cable into the flow connector on the
8605 controller. Set the flowmeter calibration
number to 1.00. Clear the display to zero by
depressing the Total Volume key for 3 sec-
onds.
B. Proceed to pump water into a calibrated con-
tainer. It is very important that this calibrated
container have markings that are at least 99%
accurate or this test will not be valid.
C. NOTE: Each time the flowmeter generates a
pulse, GALLONS will count up by 1. There-
fore, the console is counting the total number
of pulses generated for a known amount of
water flowing through the flowmeter.
D. To determine the PULSES/GALLON, simply
take the count displayed in GALLONS and di-
vide it by the amount of water pumped through
the flowmeter into the calibrated tank. The re-
sult is the new PULSES/GALLON calibration
number.
E. Compare the new PULSES/GALLON with the
factory calibration number. If the new num-
ber deviates more than 10% from the factory
number, the flowmeter is in need of repair and
should be returned to your dealer.