JCB js130 cab heater

[Matt77]

I’ve a new to me 2012 machine, air con working great, well was cold for the hour or so I used it today, but I thought I’d check if it would blow hot, for the winter, nothing, stayed cold as even set at 36, I think it was, anyone had this before? Is there something I need to turn?

 

[milkloss]

I’ve a new to me 2012 machine, air con working great, well was cold for the hour or so I used it today, but I thought I’d check if it would blow hot, for the winter, nothing, stayed cold as even set at 36, I think it was, anyone had this before? Is there something I need to turn?

Check someone hasn’t clamped off the hot water pipe. The valve jcb uses doesn’t cut it off completely so the a/c doesn’t get cold. Our telewongler currently has a brake pipe clamp on the hot water pipe!

 

[Matt77]

Check someone hasn’t clamped off the hot water pipe. The valve jcb uses doesn’t cut it off completely so the a/c doesn’t get cold. Our telewongler currently has a brake pipe clamp on the hot water pipe!

Thanks, I’ll look tomorrow, would that make sense then that it run nice and cold today, have to say I was impressed how cold it was.

 

[Matt77]

Looking at this again today, I’ve followed all pipes I can see, I can’t feel a warm pipe going into the cab, the blower/air con unit is behind the seat, so I’d expect some hot water coming in?? I can’t see any clamps. The cold is still working very well, left it going for an hour while sorting cattle and it was like the arctic in there, the control unit was flashing with an error code, 02, anyone seen this before, can’t find it online, and also haven’t managed to make it do it again this afternoon.

 

[milkloss]

Has it an electronic valve for controlling temp?

 

[Matt77]

Yep it must do as the controller is just a wired plug in back, it’s a digital display but a rotary knob to do fan speed and temp, the temp is then displayed on screen, but like I say, no cables, just a plug with wires on the back.

 

[Hesston4860s]

Have a search around the engine bay, the 13 ton Hitachi and my 3.5 ton Takeuchi both have a tap to turn the heater pipes off.

 

[Matt77]

Have a search around the engine bay, the 13 ton Hitachi and my 3.5 ton Takeuchi both have a tap to turn the heater pipes off.

That’s what I hope to find but couldn’t today, are they in a very hard to find spot? The js engine bay is quite full.

 

[Hesston4860s]

The Hitachi one is right on the top of the engine and my Takeuchi is straight in front of you when opening the bonnet.

 

[Matt77]

The Hitachi one is right on the top of the engine and my Takeuchi is straight in front of you when opening the bonnet.

I’ll look again but I think I covered it all today

 

[Hesston4860s]

I don’t know if a JS has a tap, the one I drove a 2006 I think. The heater just stopped working one day no blown fuses, chaffed wires nothing, was like it 2-3 months then it just started working again but the Hyd and water temp gauges stopped working instead !.

 

[Matt77]

It’s a 2012, yes I’ve been through it quite a bit today, took all the cover off behind the seat, all wires seem in order, no fuses gone that I could see, there’s 4 pipes going to the air con unit, all felt cold after an hour of running, 2 come off the air con pump, one via a filter type thing by the battery, I’m guessing that’s where it would be re gased, there’s some pipes that come off something next to the turbo, it’s so tight for space I can’t feel them to see if they are getting warm.

 

[ACEngineering]

It’s a 2012, yes I’ve been through it quite a bit today, took all the cover off behind the seat, all wires seem in order, no fuses gone that I could see, there’s 4 pipes going to the air con unit, all felt cold after an hour of running, 2 come off the air con pump, one via a filter type thing by the battery, I’m guessing that’s where it would be re gased, there’s some pipes that come off something next to the turbo, it’s so tight for space I can’t feel them to see if they are getting warm.

Has some one taken the thermostat out?

 

[Matt77]

Has some one taken the thermostat out?

That I can’t answer without looking into, top of the rad and few big pipes up top are hot, but I’ll look into that.

 

[ACEngineering]

That I can’t answer without looking into, top of the rad and few big pipes up top are hot, but I’ll look into that.

from experience when people take them out of matbros the cab heater wont get hot.

 

[Rs chunk]

I have a 90s aged js130 and it has a tap on the engine block too stop hot water circulating round to the cab

 

[Sparkplug]

If you go on JCB Parts Web Site and put your serial no in, you may be able to follow components on the Heater / Air Con page to answer your question regarding Taps etc

 

[Matt77]

If you go on JCB Parts Web Site and put your serial no in, you may be able to follow components on the Heater / Air Con page to answer your question regarding Taps etc

Great idea!

 

[H200GT]

Its probably a faulty actuator on the flow control valve. Never done a JS, but done a few over the years on various machines.

 

[Matt77]

Its probably a faulty actuator on the flow control valve. Never done a JS, but done a few over the years on various machines.

Would that be in the heater/fan box behind the seat would you think, I’ve found the parts diagrams, I can’t see a tap, there’s two pipes that look to go to the water system, and the other two obviously go to the air con pump. There’s a heater matrix in the cab box according to the diagram, the fact that it runs super cold must say the air con side is fine.