194 Section 10 Governor Adjustments TP-6356 4/12
10.3.2 Bosch P
Note: Before checking and adjusting engine speed,
make sure engine has reached its normal
operating temperature.
All speeds indicated apply to an engine hot under load.
The maximum permissible speed variation is 50 rpm for
fast idle speed.
1. Move the generator set master switch to the RUN
position to start the generator set.
2. Verify that injector pump lever is held in fast idle
position. See Figure 10-9.
1. Fast idle adjusting screw
2. Fast idle adjusting locknut
3. Fuel injection pump lever
T-324000-G
12 3
Figure 10-9 Governor Adjustments, Typical
3. Check fast idle engine speed. Engine speed
should be 1800 rpm (60 Hz) or 1500 rpm (50 Hz) at
full load.
4. If fast idle speed is incorrect (but not more than
50 rpm above or below the minimum/maximum
specified settings), loosen fast idle adjusting
locknut.
Note: If the fast idle is 50 rpm above or below the
minimum/maximum settings, have an
authorized service dealer/distributor remove
and adjust the pump on a test stand.
If engine speed is too low, loosen fast idle adjusting
screw until speed is correct. If engine speed is too
high, turn fast idle adjusting screw in until correct
speed is obtained. Tighten locknut securely.
5. Move the generator set master switch in the OFF/
RESET position to stop the generator set.
10.4 Magnetic Pickup Adjustment
The magnetic pickup adjustment applies to all models
so equipped. Use the following procedure.
1. Place the generator set master switch to the OFF/
RESET position.
2. The flywheel must not be rotating. Loosen the jam
nut.
3. Turn in the magnetic pickup until the pole face of
the magnetic pickup bottoms on the ring gear tooth.
4. Back out the magnetic pickup 1/4 to 1/2 turn
providing a 0.35--0.71 mm (0.014--0.028 in.) air
gap.
5. Tighten the jam nut without moving the magnetic
pickup.
GM17725A-G
Figure 10-10 Magnetic Pickup Adjustment
10.5 Digital Isochronous Governor
Programming Kit GM39344
Adapted from Instruction TT-1399.
10.5.1 Introduction
The digital isochronous governor programming kit
includes the programming CD-ROM and cable for
connecting the governor controller to the user’s PC.
This instruction is used in conjunction with the digital
isochronous governor kits.
The programming kit or Parameter Setup Tool (PST)
tells the governor controller how to operate the
generator set governing system for that application.
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