Trailer TPMS Torque

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Jan 11, 2022 | 04:33 PM

Whaleya

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Trailer TPMS Torque

I bought the customer placed trailer camera and TPMS with my new 2022 F350....there wasn't a manual included and I'm getting around to installing things.

What is the torque specs on the TPMS nut for the trailer TPMS sensors? (I change my own tires) I believe the part is HC3Z-1A189-D,

Thanks!
_W

Jan 11, 2022 | 04:54 PM

HRTKD

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From: Wyoming

Good question. I never thought about it and my tire shop didn't either. Here's what I could find.

Nut Torque: -- Nm <-- I think this is the number you're looking for, but it's not provided.

Screw Torque: 11.5 in-lbs (1.3 Nm) Nm
Valve Core Torque: 3.5 in-lbs (0.4 Nm) Nm

https://catalogue.schradertpms.com/e...Z-1A189-D.html

Jan 11, 2022 | 05:16 PM

Whaleya

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...so I was able to find it, the nut is 70.8 in-lbs
Thanks for the screw torque, I didn't find that

-W

Jan 11, 2022 | 05:21 PM

Ltngdrvr

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Never EVER seen anyone use a torque wrench to install the valve stem nut, TPMS or not, or the screw that holds the sensor to the stem.

Jan 11, 2022 | 05:35 PM

HRTKD

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From: Wyoming

Quote:

Originally Posted by Whaleya

...so I was able to find it, the nut is 70.8 in-lbs
Thanks for the screw torque, I didn't find that

-W

Where did you find it? I looked in the Ford Service Manual and came up empty.

It's off topic, but while looking for TPMS information, I did see that Ford has instructions to use motor oil on the wheel studs for a DRW (but not for SRW). Strange.

Quote:

Apply 2 to 3 drops of the specified motor oil to a clean shop towel. Using the shop towel, apply the oil to the wheel stud threads. Wipe off any excess oil from the wheel stud threads.
Material: Motorcraft Â® SAE 5W-20 Full Synthetic Motor Oil / XO-5W20-QFS (WSSM2C945-A)

Above that paragraph is a NOTE that is probably rather important.

Quote:

Do not allow oil to build up in the wheel stud threads. Only use 2 to 3 drops of oil per wheel hub.

Bold emphasis provided by me.

I did know about this and it applies to both SRW and DRW.

Quote:

On all 2-piece flat wheel nuts, apply one drop of motor oil between the flat washer and the nut. If corrosion exists, or the integral 2-piece swiveling wheel nut does not rotate freely, install new swiveling wheel nuts as necessary.
Material: Motorcraft Â® SAE 5W-20 Full Synthetic Motor Oil / XO-5W20-QFS (WSS-M2C945- A)

Jan 12, 2022 | 06:43 AM

B-ManFX4

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From: East TN

I have the instructions that came with my kit. On Page 13, Step 28 it says:

Position the new valve stem and TPMS sensor. Install the washer and nut. Tighten the nut to 70.8 lb-in. (8.0Nm)

Ford Document # SKHC3J-1A515-AB

I tried to upload it to this post but the file is too large according to the forum software. PM me if you want me to email it to you.

EDIT - I converted the document to Word format. It is much smaller but you do lose the ability to zoom in as clearly as the PDF.

Attached Files

Trailer TPMS And Camera Install Guide - Copy.docx (1.99 MB, 74 views)

Jan 12, 2022 | 08:41 AM

Whaleya

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Quote:

Originally Posted by Ltngdrvr

Never EVER seen anyone use a torque wrench to install the valve stem nut, TPMS or not, or the screw that holds the sensor to the stem.

....and not every shop uses a torque wrench for lug nuts

There are special torque limiting screwdrivers just for TPMS screws. As for the nuts, on my Honda they use a special crush nut that must be tightened to a particular value and the nuts can not be reused. I suppose it's less critical on valve stems that use normal rubber gaskets. Anyways here is a link to a whole range of specific tpms install tools from Dill.

https://www.dillvalves.com/product_c...ms/tpms-tools/