Mityvac MV5545 FST PRO FUEL SYSTEM TESTER - Manual (Page 10)

Flex Hose Connections
In many cases it is convenient to connect the FST Pro into the fuel
delivery system at a location where a flexible rubber hose is secured
to a steel fuel line using a screw clamp. A special adapter set is
included with the FST Pro for installing it into this type of connection.
It includes a universal barb adapter, three flexible hose adapters
(1/4", 5/16", 3/8"), and four wing screw clamps.
To install the flex hose adapters:
1. Follow the proper procedure under the Setup and Installation
instructions to relieve the fuel pressure and prepare for
disconnecting.
2. Loosen the screw clamp securing the rubber hose to the steel fuel
line on the vehicle’s fuel delivery system, and carefully disconnect
the rubber hose. (Fig. 12).
3. Insert the universal barb adapter (#16) into the rubber hose
(Fig. 13) and tighten the hose clamp (Fig. 14).
4. Select the appropriate size flex hose adapter (1/4", 5/16", or 3/8"),
and install it onto the steel fuel line (Fig. 15). Secure it with one of
the wing screw clamps provided (Fig. 16).
5. Follow normal testing procedures.
Proper Use, Care and Servicing
With proper care and maintenance, the FST Pro will provide years
of accurate, reliable service.
The FST is designed for use in testing modern fuel delivery systems
on vehicles equipped with gasoline powered combustion engines.
• CAUTION: DO NOT USE THE FST PRO ON DIESEL SYSTEMS
• CAUTION: DO NOT USE THE FST PRO ON VEHICLES
OPERATING ON ALTERNATIVE FUELS SUCH AS E85
OR OTHER “FLEX” FUELS
• Always drain the fuel from the FST prior to storage.
• Always disassemble the FST and return it to the storage case in
which it was originally purchased.
• Inspect components regularly for damage and replace or repair as
necessary:
- Check hoses for cracks and cuts
- Check adapters for damage and wear to threads and
sealing surfaces
- Check female quick-connects for wear and cuts to o-rings
- Inspect the male and female quick-connect components
where the pressure gauge connects to the flowmeter
• After installing the FST and pressurizing the fuel system, check
the flowmeter for leaks. If any leaks are evident, immediately
relieve the pressure, disconnect the FST, and send it to a service
center for repair.
Fig. 16
Fig. 14
Fig. 12
Fig. 15
Fig. 13
Page Number - 10 Form 824127