Bobcat 643 wiring

[d_calabria]

hey guys, im going to rewire my 643 because it is causing me too many dramas and half the functions dont work. If there meant to be a red light on the instrument panel for a hydraulic fault? like a loss of pressure? there are two on it at the moment but they both do nothing. Is there a hydraulic pressure switch? THanks

 

[OldMachinist]

One light is for hydrostatic fluid over temp and low charge pressure, 2 different sending units connected to 1 light. Depends on the machine serial number as to where they are located.
The other light is for low engine oil pressure,

 

[antfarmer2]

One light is for hydrostatic fluid over temp and low charge pressure, 2 different sending units connected to 1 light. Depends on the machine serial number as to where they are located.
The other light is for low engine oil pressure,

They should both light up when you turn the key on first click then off when started unless faulted on check the bulbs and the two fuses to the right of the key if like my 743 the fuse holders are picky

 

[antfarmer2]

They should both light up when you turn the key on first click then off when started unless faulted on check the bulbs and the two fuses to the right of the key if like my 743 the fuse holders are picky

And look to the left of the and seat if there is two plugs there like mine might be most of your trouble and save you a lot of work

 

[d_calabria]

And look to the left of the and seat if there is two plugs there like mine might be most of your trouble and save you a lot of work

ok excellent thanks. Lifted the cab today and it looks like there is a pressure switch on the top of the hydraulic pump (looks like a pressure switch) and one on the right hand side underneath the throttle handle. Are do they both provide a ground to the bulb when there is a fault?

 

[OldMachinist]

ok excellent thanks. Lifted the cab today and it looks like there is a pressure switch on the top of the hydraulic pump (looks like a pressure switch) and one on the right hand side underneath the throttle handle. Are do they both provide a ground to the bulb when there is a fault?

Sensor with yellow wire is pressure and sensor with yellow/black is temp.
They do supply ground to the bulb, orange wire at the bulb gets positive from key switch.