CAT 3126B regulator (thermostat) - so many part numbers!

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chuckster
Posts: 153
Joined: Thu Aug 27, 2020 4:53 pm
Location: Meridian, ID

CAT 3126B regulator (thermostat) - so many part numbers!

Post by chuckster »

Interestingly, I started looking around for a regulator (and gasket) to have on hand because they are cheap and they do go out. Going to the CAT site (parts.cat.com) and putting in my serial number (8YL) the parts list for the regulator pulled up the following:

115-4223: REGULATOR TP - 126-5466: GASKET
119-3075: REGULATOR - 126-5466: GASKET

Both have the same size specs but no operating temperature listed. So I call my local Cat dealership's parts department and give them my serial number and get a completely different part number:

284-5421 Regulator 222-5915 gasket

What gives?

Chuck
Chuck & Mitzi
'01 Safari Zanzibar 3646 (side entry)
Cat 3126B / Allison MD3060
Magnum M-Series "Blue Max" chassis
2018 Jeep Grand Cherokee Overland toad
wolfe10
Posts: 148
Joined: Sun Oct 27, 2019 4:12 pm

Re: CAT 3126B regulator (thermostat) - so many part numbers!

Post by wolfe10 »

Call Caterpillar Corp with your engine serial number and ask: 877 777-3126.
Brett and Dianne Wolfe
Ex: 2003 Alpine 38'. Ex 1997 Safari Sahara. Ex 1993 Foretravel U240
Moderator, FMCA Forums 2009-2020
Chairman, FMCA Technical Advisory Committee 2011- 2020
Moderator, http://www.dieselrvclub.org/ (FMCA chapter) 2002-
chuckster
Posts: 153
Joined: Thu Aug 27, 2020 4:53 pm
Location: Meridian, ID

Re: CAT 3126B regulator (thermostat) - so many part numbers!

Post by chuckster »

wolfe10 wrote: Tue Aug 02, 2022 6:20 am Call Caterpillar Corp with your engine serial number and ask: 877 777-3126.
Will do Brett. Thought a CAT dealer would be using the same database as CAT.
Chuck & Mitzi
'01 Safari Zanzibar 3646 (side entry)
Cat 3126B / Allison MD3060
Magnum M-Series "Blue Max" chassis
2018 Jeep Grand Cherokee Overland toad
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