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RVNeophytes2 · 02-05-2018, 05:24 PM

Sources talk about how easy it is to change, that the "regulator" as thermostats are sometimes called in Caterpillar-speak should be changed every few years.

I loosened my thermostat housing, and all associated connections except for one: it comes affixed to a 1.25" metal tube presumably leading to the water pump. Thinking the tube (it is hard to see) was a hose, I was inching the housing upward, having detached the hose end below. Two things surprised me: the hose end below was unrelated, and the metal tube inched out of the housing, suggesting a slip joint.

'Problem is, it stopped coming out after two inches of upward travel.

In all of the photos of the housing, there is simply an open hole where the tube is stuck, on mine.

Can anyone help? This is not supposed to be a difficult job, but I'm stalled.

1doodadd · 02-05-2018, 08:43 PM

Here is a link of one on eBay. Does your look the same? If so look at the lower tube just after the bend and you will see a rust band with no paint indication a lower clamp holding the tube during vibration. Also you will need the O-ring for the lower slip joint seal. Look at the last pic and you will see the bottom of the regulator ( t-stat ) and inside of the housing is a press in lip seal that you will also need to replace so the t-stat outer housing will seal with the regulator housing. That needs to be levered out, notice how it comes out and it will also need to be installed in the same orientation.

Hope this helps.

https://www.ebay.com/itm/Caterpillar...hYpAKZ&vxp=mtr

RVNeophytes2 · 02-05-2018, 10:01 PM

Quote:

Originally Posted by 1doodadd

Here is a link of one on eBay. Does your look the same? If so look at the lower tube just after the bend and you will see a rust band with no paint indication a lower clamp holding the tube during vibration. Also you will need the O-ring for the lower slip joint seal. Look at the last pic and you will see the bottom of the regulator ( t-stat ) and inside of the housing is a press in lip seal that you will also need to replace so the t-stat outer housing will seal with the regulator housing. That needs to be levered out, notice how it comes out and it will also need to be installed in the same orientation.

Hope this helps.

https://www.ebay.com/itm/Caterpillar...hYpAKZ&vxp=mtr

That really shed some light on the topic. I was lifting the complete assembly, not just the upper housing that you show. Am soaking the upper bolts in penetrating oil, will go at it again in the morning. Thanks.