300Tdi Defender
19
FUEL SYSTEM
2
ADJUSTMENT
LOW AND HIGH IDLE SPEED ADJUSTMENT
NOTE: The high idle speed (cold start idle)
is automatically set by the setting of the
low idle speed and cannot be adjusted
individually.
1. Check and adjust throttle cable.
See Throttle
cable
2. Start engine and run it until normal operating
temperature is reached.
3. Using a suitable tachometer, check the engine
idle speed,
See ENGINE TUNING DATA,
Information, 300Tdi
4. If adjustment is necessary, first slacken the
locknut on injection pump.
5. Turn adjustment screw clockwise to increase
engine speed or anti-clockwise to decrease the
speed. Run engine at an increased speed for a
few seconds then check idle speed again.
6. When correct speed has been achieved, hold
adjuster screw steady while tightening locknut.
NOTE: The low idle speed control is the
only permitted adjustment in service. Any
additional adjustments required must be
entrusted to authorised Bosch agents.
THROTTLE PEDAL ADJUSTMENT
Adjust
1. First ensure that throttle cable is correctly
adjusted
See Throttle cable
2. Depress throttle pedal, by hand, to full extent of
injection pump lever travel. Slacken locknut and
adjust throttle pedal stop screw to take up
clearance between screw and bulkhead. Ensure
no strain is placed upon throttle cable and pump
lever.
3. Retighten locknut.
