FUEL INJECTION PUMP ADJUSTMENT (PSU AND 50)

TESTS AND ADJUSTMENTS (CONTINUED)

INJECTION PUMP ADJUSTMENT (PSU AND 50)

Loosen nut (1) on fuel injection pump (2).

Back off setscrew (3).

Start engine.

Adjust setscrew (3) to stop control unit throttle at smoke

point or 2000(& 100) rpm at 11.5 hp (full load).

Tighten nut (l).

Stop engine.

B When replacing a defective pump, and port closing

FUEL INJECTION PUMP TIMING (PSU AND 50)

dimension and button number of defective pump are known,

use Method 1.

A Fuel injection pump timing requires use of proper thickness

timing button (model PSU, item 25, p 3-52 and 3-59; model

Use method 2 if pc dimension and button thickness are not

50, item 20, p 3-75 and 4-12). Pump was originally timed so

known, when replacing camshaft, or when retiming original

for injection occurs at 19 degrees before

port closing

pump.

top center.

0977

TM 9-2815-221

4-7