jcb tm310s boom suspension not working

[davidroberts30]

right the above stopped working yesterday

checked a few things and cant see anything obvious

press boom down and press the switch on and the switch lights up so the pressure sensor on lift ram is working but no srs light on the dash
both relays seem to be working,fuse ok
the solenoid on the lift ram has a few ohms continuity but both wires feeding the solenoid are getting continuity to earth and no voltage in either when switched on

is there any other known issue spots where wires get rubbed/broken??

 

[sym]

there are some pressure switches on the valve block aswell for the srs,(possibly 4, 2 top and 2 bottom) on the lift section and on the tilt section

 

[joe o]

On the bottom of the lift Ram there is a pressure switch and a solenoid, the wires to them are in a loop I think check for breaks in the wires where they bend as the Ram pivots

 

[milkloss]

Usually it’s the pressure sensor on the lift ram but don’t forget it cuts out when you crowd the bucket so check the rubber grommet round the base of the joystick hasn’t come loose and gone between the joystick and low pressure control tits.

 

[Fendty Dom]

We had the wire break that’s in a loop at the bottom of the lift ram as joe o says so I’d definitely check there.

 

[Ricardo]

right the above stopped working yesterday

checked a few things and cant see anything obvious

press boom down and press the switch on and the switch lights up so the pressure sensor on lift ram is working but no srs light on the dash
both relays seem to be working,fuse ok
the solenoid on the lift ram has a few ohms continuity but both wires feeding the solenoid are getting continuity to earth and no voltage in either when switched on

is there any other known issue spots where wires get rubbed/broken??

Hi
Did you sort this as we have exactly the same issue.
It would be good to know
Thanks rick

 

[davidroberts30]

Hi
Did you sort this as we have exactly the same issue.
It would be good to know
Thanks rick

 

[davidroberts30]

It was either a relay in the fuse box or a broken wire or loose connection on the sensor on the spool block under the machine

 

[Ricardo]

It was either a relay in the fuse box or a broken wire or loose connection on the sensor on the spool block under the machine

Thanks will check that where is the sensor under the machine ??
I was told there was only on on the lift ram

Thanks rich

 

[davidroberts30]

Thanks will check that where is the sensor under the machine ??
I was told there was only on on the lift ram

Thanks rich

The writing around the spool block is vulnerable if the machine climbs a clamp
There is a sensor on the spool block too