Acceleration schedule adjustment

TM 55-4920-424-13&P

b. Acceleration schedule adjustment, T-62T-2A. (See figure 3-2.)

Note

Clockwise rotation increases acceleration schedule fuel flow; counterclockwise

rotation decreases fuel flow. Adjustment is critical; no not adjust in increments

greater than 1/8 turn. Initial position of acceleration schedule adjustment screw

should be carefully noted.

(1) Adjust acceleration schedule adjustment screw to obtain proper acceleration.

CAUTION

Do not exceed 1100F (593C) maximum exhaust gas temperature.

(a) Increase acceleration schedule fuel flow if engine hesitates during acceleration or if engine takes

longer than 15 seconds to obtain rated speed (100%).

(b) Decrease acceleration schedule fuel flow if maximum exhaust gas temperature is greater than

1090F (588C) during acceleration.

Disregard characteristics of first start after

adjustment.

(2) With acceleration schedule adjustment lever located in the mid-position of adjustment plate slot, place lever

on acceleration adjustment screw. Install snap ring. Maintain screw adjustment obtained in (1) preceding;

lock wing nut.

(3) Maintain adjustments of (1) and (2) preceding throughout all testing of engine on test stand.

c. Acceleration schedule adjustment, T-62T-2A1. (See figure 3-2.)

Note

Clockwise rotation increases acceleration schedule fuel flow; counterclockwise

rotation decreases fuel flow. Adjustment is critical and the initial position of

setscrew should be carefully noted.

(1) Adjust acceleration schedule adjustment screw to obtain 1050F (566 C) maximum temperature during

starting.

(2) Place acceleration schedule adjustment lever in the minimum schedule position (full counterclockwise end

of slot in adjustment plate). Maintain adjustment of (1) preceding. Install snap ring, lock wing nut.

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