TEREX HR32 7.5 TON DIGGER (2003)

[Diggerless]

Hello
out of suggestions, the machine sometimes starts on first turn, or after several turns or if I use jump leads/pickup. The starter motor/solenoid and the ignition/starter switch have been replaced however the same start up issues Remains. Once going works well. The battery has also been replaced. Deutz engine.
For example today no start, used jump leads and started it, ran it for a while all,ok then switched off. Several hrs later first turn of the key all go ok so It switched off and turned on/off another twice and no problems fired up ok Each time. Thanks for reading.

 

[uffex]

Good day & welcome
Do you have a wiring diagram?
Kind regards
Uffex

 

[Diggerless]

Good day & welcome
Do you have a wiring diagram?
Kind regards
Uffex

Hello and thank you. I have this ?

 

[uffex]

Good day
Can I clarify we are talking cranking or starting?
Kind regards
Uffex

 

[Diggerless]

Hello it’s on starting, the key is inserted turned to allow lights come on, orange preheat goes out, move key to next position - it either starts or we get a *click* noise. Thank you yvonne

 

[uffex]

Hi Yvonne
So we are talking fail to crank?
KR
Uffex

 

[uffex]

Good day
I suggest start with the power lead to the starter, when cranking with a multi meter connected in DC voltage see what it drops too. 2 check the ground side of the relay seems less likely as you have clicking when you attempt to start. Please identify where the clicking is coming from - starter solenoid or relay.
Kind regards
Uffex

 

[Shivan Dookeran]

might be something to check but maybe there is a parasitic drain on the batteries as the op said it starts and works well after first startup