Adjusting The Damping Spring (Generator Operation, Pv 187) - Hatz 2-4L30 Workshop Manual

Hatz diesel engine workshop manual
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– Replace the adjusting tool - 28 - by the screw plug again, using a suitable tool (e.g.
screwdriver) to check that the engine monitoring piston slides smoothly. If it tends to
stick, slightly reduce the preload at the grub screw (146/1) and repeat the check.
– Remove the adjusting device - 24 - and install the injection pump (M 14.20).
Note on changing the power setting
Adjustment data for a change in engine power can be obtained from your HATZ service
point. Proceed as follows to change the power setting:
– Move the speed control lever to the stop position.
– Screw in the injection volume adjusting tool - 28 -.
– Move the speed control lever to the start position.
– Install measuring device - 24 - and set the dial gauge to precisely „0".
– The governor rod travel for the desired power output is obtained from the original
governor rod travel setting plus (for increased power) or minus (for decreased power)
the difference from the adjustment data.
Example:
To change a 3 M 40 engine (n=3000 rpm) from power output B to power output F.
Governor rod travel for output F acc. to adjustment data:
Governor rod travel for output B acc. to adjustment data:
Difference from adjustment values:
The adjusting tool - 28 - must therefore be turned counter-clockwise until the dial gauge
of the measuring device - 24 - reads 0.39 mm.
If the engine's running speed is to be altered (with or without a change in power output),
the following work is needed:
– Set the engine speed to the new value.
– Move the governor rod to position „X" and set the dial gauge to „0".
– Turn the adjusting tool - 28 - until the dial gauge shows the governor rod travel called
for according to the type plate or adjustment data.

4. Adjusting the damping spring (generator operation, PV 187)

This adjustment can only take place with the engine running at the upper idle speed
limit and off-load. In addition, the engine must have reached its regular operating tem-
perature, or else the speed setting will not be accurate.
– Turn the stop screw for the upper idle speed limit (146/2) until this speed is approx.
0.3 % lower than the desired value according to the type plate.
Example:
Type plate data 3000/60 = 3060 - 0.3 % = 3050 rpm. Make sure that the damping
spring is not yet touching the governor lever. Unscrew the grub screw (146/3) at the
monitoring block until no change in engine speed is detected.
After this, retighten the grub screw (146/3) until the upper idle speed rises again by the
same value of approx. 0.3 %.
+0.13 mm
-0.26 mm
0.39 mm
L / M . . 09.96
3

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