GREENMECH CHIPPER (ISUZU ENGINE) OVER HEATING

[AKERS TREE SERVICES]

Hi, I don't know if anyone can help but have been searching the internet for months for a solution and nothing...

My Greenmech Chipper ( 220 I think ) with the Isuzu engine after half an hour of running, overheats and then cuts out. We have had the head pressure tested and skimmed, gaskets replaced. We have given the radiator several good cleans, had all water pipes checked etc and it is still doing it. I cut more vents into the sides of the chipper and that didn't do anything so started running it with the lid open. This worked for a while and it would take longer to over heat, but recently has been having no effect. We have also had the thermo switch/ wiring replaced, oh and put coolant in as well. I am at a total loss... an expensive one at that. I really don't know what to try next. Does anyone have or had similar problems? Someone did suggest putting 2 radiators on instead of one and possibly turning one the other way round???

 

Thanks.

Pete.

[Steve Bullman]

@PeteB is your man, hopefully he will be along shortly 

[Mick Dempsey]

Probably nothing but I was reading on another forum about a similar issue on a yankee chipper.

 

Turned out the protective plastic parts that surround the rad forcing the air better into it were missing.

 

I can't see two rads being the solution, I had the same  chipper and used it all day in 35 degrees with no issues.

[AKERS TREE SERVICES]

Ok Thanks Mick I'll check that. We live in England ( Norfolk ) far from 35 degrees EVER! Thanks Steve, ill keep an eye out for PeteB.

[Mick Dempsey]

I don't have another picture, but is your rad set up the same as this?

[AKERS TREE SERVICES]

Just found out that the chipper is actually a CM202 not a 220. I'm not that mechanically minded, so thought it would be easier if I attached some pictures of the chipper for you to look at.

 

[Mick Dempsey]

All looks in order (I'm no expert) 

 

See what PeteB says, he should spot the thread title and pop up sometime.

 

sorry I couldn't help more.

[monkeybusiness]

Have you had the rad inspected/tested by a specialist? You can get them re-cored. It could have internal blockages that restrict the water flow, even if it appears clear through the fins. 

[Daniël Bos]

Does it have a normal thermostat? If it does I'd remove it to eliminate it as the source of yr problem.
Then the radiator itself...
Presumably airlocks have been eliminated?

[AKERS TREE SERVICES]

Thanks for all your help, we haven't had the radiator professionally tested, so we will try it. DO you know roughly how much a new radiator for one of these is? I didn't know if it might becheaper in the long run to stick a new one on. We have had the thermostat off as well .

 

Edited August 30, 2017 by AKERS TREE SERVICES