Mityvac MV5545 FST PRO FUEL SYSTEM TESTER - Manual (Page 9)

Fig. 9
Fig. 11
Fig. 10
Fuel Rail
Banjo
Fitting
Banjo Bolt
Banjo Adapter
Fuel Filter
Form 824127 Page Number - 9
To release the connection, press and hold the release button on
the side of the female quick-connect, while pulling the connection
apart (Fig. 8). Do not attempt to release the quick-connect connection
using a disconnect tool, as this may damage the fitting. Replacement
clips are included if needed
Adapters
The FST Pro includes a selection of adapters for connecting inline with
the fuel delivery systems of a wide range of automotive makes and
models. The chart on pages 6 and 7 outlines the adapters available,
and their applications. Each adapter is etched with an identification
number for easy reference. Adapters can be purchased separately in
sets according to the order number indicated in the chart.
In most cases, selecting and installing adapters into the fuel delivery
system and connecting the FST for testing, is straightforward and
logical. Simply match the fuel system connection to the equivalent
male and female adapter set, and install them as outlined in the
Setup and Installation instructions later in this manual.
Banjo Connections
Banjo style connections are commonly used by many Asian and
European manufacturers to connect a hose or fuel line to the filter
and/or the fuel rail. Often, this will be the best place to connect the
FST inline with the fuel system. This type of connection may be a
little confusing the first time it is encountered.
A banjo connection consists of a round, hollowed-out “banjo”
connector with two flat sides. A hollow bolt with a cross-hole
passes through the banjo connector and threads into the connecting
component (i.e. filter, fuel rail). When the bolt is tightened, it creates
a secure face-to-face seal through which the fuel flows. See Fig. 9 for
an illustration of this connection.
Two (2) threaded adapters and a closed end nut are required to
properly install the FST into a banjo style connection. Refer to the
adapter chart for a list of the banjo adapters included with the FST.
To install the banjo adapters:
1. Follow the proper procedure under the Setup and Installation
instructions to relieve the fuel pressure and prepare for
disconnecting.
2. Loosen and remove the bolt from the banjo connection at the
fuel filter or fuel rail.
3. Pass the hollow adapter with the cross-hole through the banjo
fitting. Be sure to include a washer on both sides of the banjo
fitting (Fig. 10).
4. Thread the closed-end nut onto the end of the bolt and tighten
securely with a wrench, trapping the banjo fitting.
5. Thread the hollow bolt adapter without the cross-hole into the
filter or fuel rail, in place of the original bolt, and tighten securely
with a wrench. Be sure to include a washer between the face of
the filter or fuel rail, and the opposing face of the adapter bolt
(Fig. 11).
6. Follow normal testing procedures.
NOTE: Always throw away the original used washers, and replace
them with new when reconnecting the banjo fitting back to the
vehicle’s original specification.
Fig. 8
Closed
End Nut
Banjo Fitting
Banjo Bolt
Adapter