Wacker Neuson 803 Dualpower, Service Manual

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4-30
SHB 803 en – Edition 2.4 * 803s410.fm
Engine
4.25 Measuring and adjusting the engine speed
Measuring the engine speed
The engine speed can be quickly and simply determined with a tachometer.
☞ Measurement on the crankshaft disk or on the ring gear.
Notice!
The maximum engine speed is set and sealed by the manufacturer without the
pump and may not be modified.
Adjusting engine speed
Only the idling speed can be adjusted
☞ Adjust engine speed without load.
☞
Run the diesel engine until it reaches operating temperature.
☞ Check idling speed and maximum engine speed with all attachment functions in neutral.
➥ Idling speed: 1300 +/ − 25 rpm
➥ Max. engine speed: 2675 +/ − 25 rpm
☞
In the event of deviation, correct the idling speed by means of the idling speed adjusting
screw
A .
4.26 Compression
☞
Clean the engine.
☞ Run the diesel engine until it reaches operating temperature.
☞
Stop the engine.
☞ Remove the injection lines and the injection nozzles.
☞
Set the fuel supply to zero delivery.
➥ Remove the connector for the cutoff solenoid.
☞
Turn the engine before attaching the compression gage.
➥ The remaining fuel is ejected.
☞
Attach the compression gage to the respective cylinder with a sealing ring.
☞ Turn the diesel engine with the starter and read off the pressure on the pressure gage,
repeat until the reading is stable.
➥
Specified value: 34.3 +/ − 1 bar (498 psi +/ − 15) at 250 rpm
➥ Threshold value: 27.5 +/ − 1 bar (399 psi +/ − 15) at 250 rpm
☞
Install and connect the components again in the reverse order.
☞ Check the system for leaks.
Fig. 45: Manual tachometer
Fig. 46: Adjusting engine speed
A
Fig. 47: Compression