TM 5-3805-255-14
0028
ADJUSTMENT
High Idle Speed Adjustment
NOTE
Be sure engine is at operating temperature before making high idle speed adjustment.
Check and adjust engine high idle speed as follows:
CAUTION
DO NOT OVERSPEED ENGINE. Failure to follow these instructions may result in
damage to equipment.
a. Check engine high idle speed with pump control lever (Figure 9, Item 4) against high idle stop screw
(Figure 9, Item 3).
NOTE
Engine high idle speed should be within +20 RPM of maximum idle RPM stamped on
vehicle serial number plate.
b. If out of specified speed, remove seal rivet (Figure 9, Item 5) from boss and plastic seal cap (Figure 9,
Item 1) with a small punch. Be careful not to damage seal rivet boss when removing rivet.
c. Loosen high idle speed stop screw locknut (Figure 9, Item 6) and adjust to specified high idle. Tighten
locknut.
d. Remove and discard seal wires (Figure 9, Item 2).
Figure 9. Seal Wire Locations.
0028-9
