JCB loadall 524/50

[Av Gorritt]

We have a JCB loadall as title . This shed the drive to the engine oil pump , and now has a new engine . Radiator clean , and all seems OK but still tending to overheat . How to test that the fan hydraulic drive is working to capacity (it's a stand alone fan with a hydraulic drive , and is not attached to the engine at all . New thermostat came fitted, with the complete new engine . It's running on 50/50 premium antifreeze with inhibitors . Any tips for a solution welcomed . Just in passing it isn't a problem when feeding up or general yard work , and of course , I realise we have had high temperatures , but it surely should cope with them ? Or is it a general JCB disease?

 

[ACEngineering]

We have a JCB loadall as title . This shed the drive to the engine oil pump , and now has a new engine . Radiator clean , and all seems OK but still tending to overheat . How to test that the fan hydraulic drive is working to capacity (it's a stand alone fan with a hydraulic drive , and is not attached to the engine at all . New thermostat came fitted, with the complete new engine . It's running on 50/50 premium antifreeze with inhibitors . Any tips for a solution welcomed . Just in passing it isn't a problem when feeding up or general yard work , and of course , I realise we have had high temperatures , but it surely should cope with them ? Or is it a general JCB disease?

clean the rad spotless inside and out, be aware i looked after a 520-40 once and that had a blower fan not a sucker so rad looked clean on the outside face but behind the fan is was solid.

the fan motors also have a screw on them to adjust speed, there will be a rated speed in the manual i expect, best not go higher than that or the fan may explode and knacker the rad.

 

[Jato]

They struggle to keep cool with the standard radiatior.
There was a wide core option available and this did work

 

[Av Gorritt]

They struggle to keep cool with the standard radiatior.
There was a wide core option available and this did work

I thought this might be the case . . The rad core is clean inside and out , it has a new thermostat , the only thing apart from all that is the exhaust box and pipe , the lagging was kaput when the engine was changed , and so it must get quite a bit of under-bonnet heat from that . I'm awaiting a delivery of exhaust lagging to remedy that . I have to say that even considering all the foregoing , I think the cooling system must be at it's limits , and of course the hot couple of days didn't help . As an aside the fan is hydraulic with no electric wiring at all , and yet there is what looks very much like a bi-metal strip switch on it . I wonder what the point of that is ?