deutz air cooled road compressor

[super4]

I have a 2 cylinder deutz engine on a compair road compressor. It will fire up but wont run. Every time I try and start it, it will always fire up for a second, but something is preventing it from running. Anyone any ideas?

 

[Renaultman]

I have a 2 cylinder deutz engine on a compair road compressor. It will fire up but wont run. Every time I try and start it, it will always fire up for a second, but something is preventing it from running. Anyone any ideas?

Oil pressure auto cut off?

 

[086steel]

Had one before an the governor was broke an it did that had to scrap it for a finish

 

[Pheasant Surprise]

I have a 2 cylinder deutz engine on a compair road compressor. It will fire up but wont run. Every time I try and start it, it will always fire up for a second, but something is preventing it from running. Anyone any ideas?

Is that a C30 model and do you know what year? Attached is a parts list and operating manual with wiring diagram, air diagram etc here for C30 to C50 models from 2003-2009 year machines. Might help you for fault tracing etc.

Here's a handy fault diagnosis extract from the manual, especially the part highlighted in red:

7.5 Monitoring / fault

DANGER
Bridging the safety switch in the automatic monitoring system is not permitted! The display on the pressure gauge may not go further than the red line.

When the “Fault” indicator lamp lights up, the screw compressor is automatically shut down when the following faults occur:

• Fuel shortage
• Compressor temperature too high
• Engine oil pressure too low
• Engine oil temperature too high

After one of these faults, it is only possible to restart the machine after the fault that caused the machine to be shut down has been corrected.

ATTENTION
Disconnect the battery or generator only when the engine is not running.

• Switch off the machine if the compressed air transports oil spray or if excessive oil is consumed. (Refer to the trouble-shooting section)
• Check that the "battery charge" pilot lamp is not illuminated. If it glows, even weakly, refer to the trouble-shooting section.
• Check that the air pressure (7) assumes a value within the permissible pressure range.

If the machine cuts out, before switching off at the ignition switch (1) carry out the following checks:

• Interrupt the electric connection to the engine oil pressure switch immediately after the engine has cut out and leave it in the interrupted state.

If the "fault" pilot lamp goes out immediately this indicates that either a too low engine oil pressure or a lack of fuel or a defective engine has led to the cut-out.

• If the light continues glowing this indicates that an excessive engine temperature or compressor temperature led to the cut-out.

In order to trace the origin of the fault, interrupt the engine oil temperature switch (with the engine oil pressure switch still switched off). If the lamp now goes dark this indicates that the problem is related to the oil temperature.

• If the lamp continues glowing the fault is located somewhere else. In this case reconnect the engine oil temperature switch and interrupt the connection to the compressor temperature switch. If the lamp goes dark the compressor temperature has led to the cut-out.
• Reconnect all electrical connections once the fault has been identified in order to re-establish the function of the protective elements. Also reconnect the engine oil pressure switch.
• Switch the ignition switch to its position (Off-Aus).

NOTE:
These checks must be carried out immediately after the installation has cut out as the protective circuits reset themselves after cooling down.

If the ignition switch is pushed to the very left while the machine is running it will be switched off.

 

[Cjm]

Have you tried opening air taps and seeing if it will run unloaded?

 

[Mursal]

Disconnect the oil pressure switch on the engine, just to test

 

[super4]

Have you tried opening air taps and seeing if it will run unloaded?

Yes this makes no difference.

@Pheasant Surprise Thankyou .

 

[Pheasant Surprise]

See how you get on with disconnecting the various engine oil pressure and engine oil temperature and compressor temp switches as described above.

Once you’ve checked those then you’re onto the fault relay K1, it’s wiring and (if fitted) the low-fuel cutout switch and circuit through relay K2.