Caution: This document contains mixed page sizes ... - Cummins Onan

WARNING Accidental or remote starting can
cause severe personal injury or death. Before
removing a housing panel or access door, disconnect
the negative (−) cable at the battery to
prevent the engine from starting.
GOVERNOR ACTUATOR
HIGH-IDLE
SPEED STOP
SCREWS
The governor actuator (Figure 9-3) is removeable
by removing the housing end panel (Figure 4-2) and
the fan and inner bulkhead (Figure 8-1). Remove
the actuator from the engine block (2 screws). When
reassembling, make sure the O-ring seal is in place
and that the push rod goes through the internal
guide hole. Replace the actuator if:
• Electrical resistance across its terminals is not
2 to 4 ohms.
• The plunger does not pull in smoothly when B+
(12 VDC) is applied across its leads.
• The plunger does not move in and out smoothly
when pushed in by hand.
GOVERNOR
ACTUATOR
HIGH-IDLE SPEED
Reset high-idle speed if the stop screw seals have
been broken or internal governor parts have been
replaced or are worn. To reset high-idle speed:
1. Remove the governor actuator to allow operation
at full fuel rack, but leave it connected to
keep Fault No. 19 from preventing Start. Plug
the opening to keep oil from splashing out.
2. Disconnect the fuel pump and power it directly
with a 12 volt battery to keep the engine running
when Fault No. 12 or 14 occurs.
FIGURE 9-3. GOVERNOR ACTUATOR AND HIGH-
IDLE SPEED STOP SCREW
WARNING These adjusting screws are in
close proximity to rotating belts and pulleys
that can cause severe personal injury. Be
very careful not to get your hands near the
pulleys and belts while making the adjustments.
3. Disconnect all loads from the genset to protect
them from overfrequency and start the genset.
Adjust the stop screws (Figure 9-3) to obtain
67.3-68.3 Hertz (2019-2049 rpm). TO STOP
THE ENGINE, disconnect the fuel pump from
the battery.
4. Seal the adjusting threads with paint.
5. Re-install all of the components that were removed
or disconnected.
9-5