FUEL INJECTOR PUMP CALIBRATION (Cont).
(f) Temperature gage,
(9) Fuel supply valve,
(h) Orifice fitting. Located in fuel supply line between fuel supply pump and fuel supply valve.
Orifice fitting is necessary to maintain correct calibration fluid temperature.
( i ) S h u t o f f v a l v e .
(j) Fuel supply pump.
(k) Fuel return line,
(1) Variable speed control.
PREPARATION FOR CALIBRATION
Flush fuel injector pump with calibration fluid.
Check fuel injector pump drive shaft for freedom of rotation.
Engage fuel injector pump drive shaft on test stand drive coupling. Install fuel injector pump on
test stand mounting bracket with 3 washers and nuts, Tighten nuts to 30 Ib.-ft. (41 N.m).
Install transfer pump inlet connector (8).
Loosely connect 8 test stand injector lines (4) to fuel injector pump connectors.
Install transfer pressure tap adapter (3), Install shutoff valve (5) between transfer pressure tap
and transfer pressure gage (6).
Remove 2 screws, timing cover, and timing cover gasket. Install throttle advance gage gasket
and throttle advance gage (13) in timing cover opening. Set throttle advance gage to indicate
zero. Discard timing cover gasket.
Connect housing pressure gage line (11 ) to housing pressure connector (12).
Connect fuel supply line (9) to transfer pump inlet connector (8).
Ensure that fuel return line (2) is connected so that fuel is directed
Connect test stand fuel return line (2) to fuel injector pump return line fitting (1).
Connect positive test lead (14) from adjustable dc voltage source (16) to shutoff solenoid
terminal. Connect ground lead (15) to mounting plate.
Open fuel supply valve (1 O) and turn to test stand ON position. Allow fuel to bleed from
loosened fittings of test stand injector lines (4) for several seconds, then tighten all fittings.
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