New Holland CX720 Repair Manual page 1898

Fuel injection pump - Adjust (B.20.A.21 - F.45.A.01)
CX840
NOTE: Before proceeding, make certain that the throttle controls are properly adjusted.
1. Ensure the throttle control is in the full idle position.
Back off the low idle auxiliary adjustment screw
(2)Adjust the low idle screw (1) so that the engine
speed is 1290 RPM +/- 10.
Thread the low idle auxiliary screw in until low idle
speed reaches 1310 RPM +/- 10.
Run the throttle up to high idle and then back down
to the low idle position to confirm correct speed set-
tings.
POWER PRODUCTION - FUEL AND INJECTION SYSTEM
2 4/7/2006
B.20.A / 68
1
70-150-2236