Question about Pramac GBW30P Encl Diesel Genset w/Perkins Eng

# What is the size Battery (cranking amp) needed for a 3990cc 4 cylinder Perkins 50HP AA Series Naturally Asperated Diesel Engine With a 40KW Generator attached. Thanks, Verner From Florida.

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### Starlight Power

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No matter it is 40KW Perkins generator, or other brand of generator, like Cummins and Volvo, the battery capacity is 24V DC in total. (One battery is 12 V, generator needs two batteries.)

Posted on Sep 27, 2018

### Ifesi

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Use a 120 amps battery

Posted on Jun 04, 2011

### Fred Yearian

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If the unit has a battery box, measure it and get the largest size that will fit and of course the correct voltage. Diesels take a lot to crank.

You can search battery sizes on the internet for physical size. NAPA has a pretty good selection.

Posted on Apr 02, 2010

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### Perkins 3 cylinder powered pramac generator

Start looking at your safety circuits.

1. High water temp
2. Low Oil
3. Low water etc...

From the manual these are the protection circuits.

• Engine protection: low oil pressure, high engine temperature.
• Genset protection: under/over voltage, overload, battery charger failure, battery voltage out of limits,
under/over frequency, start failure.
• Circuit breaker protection: IV poles.
• Differential protection.

Any one of them will trip the fuel relay closed. What you may be able to do is disconnect one at a time each protection circuit and see when the fuel relay opens. (Make sure to reconnect each one if it had no effect on the fuel solenoid)

Once you isolate which circuit it is in then you can chase wires or change the bad switch.

Thanks for choosing FixYa.

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If we're talking about the thing that has a pipe to each of the cylinders on your engine then the answer is Yes, your injector pump must be correctly timed in order for the engine to run properly. This is the part of the diesel that does what a distributor on regular car engine does, namely ignition timing.

The exact procedure for setting the timing depends on what model of engine you have, get a manual from Perkins to be sure.

That said it usually goes like this:
1 - make sure the engine has the correct cylinder at TDC, this makes the gear connected to the camshaft be in the correct position.

2 - Set the pump at the correct position, this will either involve looking at a mark in a window on the pump (standyne pumps), or looking at the keyway in the shaft of the pump, etc.

3 - Bolt the pump into place on the engine making sure the gears/drive meshes nicely. Connect all the fuel lines to the pump.

4 - purge the injectors by loosening each fuel line at the cylinder end and cranking the engine until fuel comes out of the pipe, then tighten it back up.

5 - Crank the engine and start it, check the rpm.

Rank this answer if it helped,
Carl

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