ACTUATOR TEST

-7-

(o) The preceding tests and adjustments must be successfully

performed to assure proper operation of the actuator test stand.

2-4 ACTUATOR TEST

(a) Remove calibration manifold and install actuator to be

Connect supply line and G3 to "P" through the swivel nut

tested.

tee, return tube to "R", G1 to A1, G2 to A2 and cables W3 and W4 to

(See Figure 2).

actuator connectors.

(b)

Determine the style number of the actuator being tested

and refer to the appropriate table for test pressures and meter

readings.

(c)

Set S2 at ON.

(d)

Starting with S3 in START position rotate S3 to each of

the other four positions and compare all meter and gauge readings

with the values specified in the table.

(e) Turn the pump (S2) off and return S3 to start position.

(f) Refer to the appropriate table and determine the

Manually place the piston

actuator piston position for full fuel.

in the full fuel position and Meter M1 should read less than 20 volts.

(g) Move the piston gradually towards the fully closed

throttle position, the transducer secondary voltage indicated on

Meter M1 should increase in a linear manner to a maximum of more than

20 volts.

(h) Slowly move the actuator piston from no fuel to full

fuel position and M1 should steadily decrease without changing

direction of movement.

If the results obtained during the above tests do not meet

the specifications, the actuator requires adjustment or repair.