Triumph TR6 PI Operation Manual page 173

FUEL SYSTEM - PI
Testing - with a test rig on which the line pressure
can be varied from 0 to 100 Ibf/in
2
(0 to 689;50
Kn/m
2
10. Remove each injector in turn 19.60.01.
11. Use Fawley white spirit '100' plus 50 parts per
million Santo1ene
'c'
or Shell calibrating fluid
'c'
for
testing purposes.
12. Flow test the injector at 50 to 60 g.p.h. (227·298 to
272·758 litres per hour) at 100 1b/in
2
(689·50
Kn/m
2
)
pressure. During this test the cone or needle
must freely vibrate off its seat and the injector must
produce an evenly distributed cone of fuel at an angle
of 55° to 60°.
13. Flow the injector with an applied pressure of 100
lbf/in
2
(689'50 Kn/m
2
)
and gradually reduce the
pressure to zero. Use compressed air to remove fuel
from the nozzle tip. Increase applied pressure to 40
lbf/in
2
(275·80 Kn/m
2
)
and check the time taken for
a droplet of fuel to appear at the injector tip. This
should, not be less than 60 seconds.
14. Flow the injector with an applied pressure of 100
lbf/in
2
(689·50 Kn/m
2
)
and gradually reduce the
pressure to zero and remove fuel from the nozzle tip
with compressed air. Increase the applied pressure
gradually and observe the pressure at which the
injector sprays an evenly distributed cone of fuel.
This should be between 45 and 55 lbf/in
2
(310·26 to
379·21 Kn/m
2
).
15. Renew any injectors that fail the above test.
Refitting
5. Reverse instructions 1 to 4 ensuring:-
a) A kinked pipe is renewed 19.60.24.
b) Absolute cleanliness is observed.
Removing
1. Isolate the battery.
2. Using a suitable open ended spanner across the milled
flats, hold the injector steady and disconnect the pipe
from the injector at the elbow union nut.
3. Check that the pipe is marked for re-assembly, if
more than one pipe is to be removed.
4. Disconnect the pipe from the metering unit.
INJECTOR PIPE NUMBER ONE
- Remove and refit 19.60.15
19.60.02 P.I. Sheet 2
19.60.1)
Triumph TR6 Manual. Part No. 545277 Issue I