Kubota D1105 3 Cylinder glow plug voltage what should it be

[DJthebigfella]

Hi i have a kubota f2400 from mower with a D1105 3 cylinder. It wont start and i checked the voltage to the glow plugs and i am only getting 9.5 volts. I dont think this is enough to heat up to start it. What should the voltage be on the glow plugs please?

I have 12 v to the plug but when i engage the glow plugs to heat them i only get 9.5v. Would a bad plug cause this voltage drop.

I have checked them as stated in the manual and resistance is good and individually they with 12v they tested and glowed ok but when in the motor the voltage drops to 9.5v

Any advice would be much appreciated thanks in advance.

 

[GreensvilleJay]

Start at the battery !
What's it's voltage before you start and then after 5 minutes of 1500 RPM running ?
How old is the battery ?
What's the CCA of it?
Ever been 'load tested'?
Have you removed/cleaned/inspected the battery cables ?
Have you removed/cleaned/inspected the Glow Plug wires ?
Is the GP control circuit a switch or a 'computer' ?
What's the air temperature ?

Normally a 'lead acid battery' will read 13.2 volts when fully charged, at 70*F.
Glow plugs will draw 10 amps ,each( 3 x 10= 30 amps).
A small resistance of 0.1 ohms between battery and glow plugs, will 'drop' 3 volts ( 0.1 x 30 ).
That's why wiring MUST be in GREAT condition!