L i m i t i n g Speed Governor 14.3.1
DETROIT DIESEL 53
3. Hold the high speed spring retainer and tighten the
lock nut.
Fig. 4 - Governor Spring Assemblies
Adjust Idle Speed
With the maximum no-load speed properly adjusted,
the idle speed may he adjusted as follows:
1. With the engine running at normal operating
temperature and with the buffer screw backed out to
avoid contact with the differential lever, turn the idle
speed adjusting screw (Fig. 5) until the engine idles at
the recommended idle speed.
The recommended idle speed is 500-600 rpm, but may
vary with the particular engine application.
2. Hold the idle speed adjusting screw and tighten the
lock nut.
3. Install the high speed spring cover and tighten the
two bolts.
Adjust Buffer Screw
With the idle speed properly set, adjust the buffer
screw as follows:
Fig. 3 - Adjusting Maximum No-Load Engine
1. With the engine running at normal operating
Speed
May, 1971 SEC. 14.3.1 Page 3