PROBLEM WITH STARTING ON THWAITES DUMPER

[Jensenmike]

Hi everyone,

I have a problem with starting on a Thwaites Alldrive 5 ton dumper. Turned the key & gives the symptoms of a flat battery (starter motor tries to turn over slightly, but not enough to fire engine). Battery changed for new one, but still no good. Removed battery leads & cleaned terminals & remade earth connection to chassis - still no good. Thought it must be the starter motor, so changed that for a new one, but still no good. Wondering where to look next ? Perhaps I should have changed the battery leads, they appear okay, but there could be a major break under the pvc insulation I guess. Obviously we are losing battery power somewhere, that should be going to the starter motor. Does anyone have a wiring diagram for this machine ? It's a 1997 model, with the Perkins Phaser AA series engine. Any thoughts or help much appreciated.

 

[Zetor]

Check tipping leaver isn’t stuck in down position, this would cause the hydraulic system to pressurise when you’re trying to start it.

 

[agrimax]

As above and if it's not that,have you tried a direct contact from the battery positive on the starter solenoid to the small energiser terminal? ie bypassing the key switch.Making sure it's out of gear of course!

 

[ridger]

@holywell farmer

 

[Jensenmike]

Thank you. I'll try that.

 

[Petebog]

Hi everyone,

I have a problem with starting on a Thwaites Alldrive 5 ton dumper. Turned the key & gives the symptoms of a flat battery (starter motor tries to turn over slightly, but not enough to fire engine). Battery changed for new one, but still no good. Removed battery leads & cleaned terminals & remade earth connection to chassis - still no good. Thought it must be the starter motor, so changed that for a new one, but still no good. Wondering where to look next ? Perhaps I should have changed the battery leads, they appear okay, but there could be a major break under the pvc insulation I guess. Obviously we are losing battery power somewhere, that should be going to the starter motor. Does anyone have a wiring diagram for this machine ? It's a 1997 model, with the Perkins Phaser AA series engine. Any thoughts or help much appreciated.

Hi
My barford dumper had a earth wire from engine to chassis that had broken, repaired it, made a big difference

 

[roscoe erf]

will it start with jump leads connected directly to starter

 

[Cotswoldperformance]

Watch out for corrosion on the inside of terminals where either the live or earths are actually crimped. Will give the same symptoms as a corroded terminal. If you have a multimeter, some simple voltage drop tests will identify the issue easily. If you haven’t done a voltage drop test defore, drop a message through the website www.cotswoldperformance.com with a contact phone number and I’ll talk you through it, takes 5 minutes

 

[Jensenmike]

Many thanks to you all for your replies. It was the battery leads & terminal clamps causing the problem - changed for new ones & all fine now.

 

[rob healey]

I have a thwaites 1 ton dumper. I started it yesterday and left it ticking over. Suddenly it cut out and all the ignition lights were out and absolutely no sign of life ... I am guessing a fuse ...I checked the one by the red key but that was fine... any ideas anyone ?? Where are the other fuses located?

 

[little blue]

Master switch on dash pressed accidentally