Harbor Freight Tools MADDOX MH-DCT19 Owner's Manual & Safety Instructions page 5

D. Vehicles with rubber hose connections:
a. Disable all fuel pumps and properly release
pressure from the fuel lines as needed
according to the vehicle's service instructions.
b. Be prepared to catch any excess fuel and
disconnect fuel hose at point directed
in the vehicle's service instructions.
c. Determine size of fuel hose, either 1/4" or 3/8"
inner diameter. Connect the appropriate
Hose (8,9) from the kit to one of the aluminum
fittings on the Hose Manifold (2). If using
the 3/8" Hose, slide it all the way onto the
inner part of the Hose Manifold. Secure the
Hose using a Hose Clamp (10).
d. Slide a Hose Clamp over the end of the
vehicle's fuel hose. Connect the vehicle's
fuel hose to the other aluminum fitting on
the Hose Manifold. If it is a 3/8" hose,
slide it all the way onto the inner part of the
Hose Manifold. Secure it using a Hose Clamp.
e. Slide a Hose Clamp over the end of the
Hose that is attached to the Hose Manifold.
Connect this Hose to the vehicle's fuel
connector where the fuel hose used to be
connected. Secure it using a Hose Clamp.
f. Tighten all Hose Clamps securely
using a screwdriver.
g. Attach the Test Fitting to the remaining
fitting on the Hose Manifold.
WARNING! TO PREVENT SERIOUS INJURY
AND DEATH FROM FIRE, do not proceed
with testing unless all connections are
the correct size and seal completely.
4. Secure end of clear relief hose inside an appropriate
fuel collection container in a safe place that will
not be damaged, heated, or knocked over.
5. If fuel pumps were disabled for
connecting the kit, re-enable them.
Note: This is a generic procedure. Follow vehicle
service instructions for correct test procedure.
6. Turn ignition to on position.
Item 64939 For technical questions, please call 1-888-866-5797.
7. Turn off all accessories, such as
radio, air conditioning, etc.
8. Listen that fuel pump starts briefly.
9. Check for leaks. If a leak is found, turn ignition off,
then clean up and fix any leaks before proceeding.
10. Turn ignition off, then back on to cycle fuel pump
again. Continue cycling fuel pump to ensure
pressure builds to manufacturer's specification.
11. Again check for leaks. If a leak is found,
turn ignition off, then clean up and
fix any leaks before proceeding.
12. Perform any additional idle or
other test measurements as directed
in vehicle's service instructions.
13. Turn ignition off.
14. Make sure end of clear relief hose is still secured
inside an appropriate fuel collection container.
Then press and hold the pressure relief button
until the pressure gauge reads 0.
15. Allow remaining fuel to drain out of relief hose,
then remove it from the fuel collection
container and seal that container.
16. Use shop rags to catch any spilled fuel while
disconnecting the kit from the fuel system. If a banjo
bolt connection was used, put the stock banjo
bolt and washers back in place exactly as they
were before the test. Tighten all connections
according to manufacturer specifications.
WARNING! TO PREVENT SERIOUS INJURY
AND DEATH FROM FIRE, place all shop rags
and other materials that contain fuel or fuel
vapor into an approved, ignition-resistant safety
oily waste can or dispose of them properly.
17. Allow kit to dry completely in an area
away from ignition sources and other
flammable materials before storing it.
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