Suspension torque clarification needed
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Mountain Pass
Joined: Apr 2011
Posts: 155
Likes: 77
From: marin co., california
Suspension torque clarification needed
Folks, I'm in the process of reassembling my truck after having all the nuts and bolts zinc-plated (prefer cadmium, but it's now outlawed in CA). I'm looking at the OHM section 3-50 with Miscellaneous Torque Limits chart.
The front spindle arm to spindle lists a torque spec of 165 ft-lbs, however, it refers to a 7/8-16 bolt. My bolts are 3/4 in-coarse thread (don't know pitch off-hand) I'm a bit worried about overstretching the bolt. That seems like a high value to me.
Additionally, looking at the previous page for Steering Linkage Torque Limits, I don't recognize the nomenclature in many of the items for instance:
Spindle Connecting Rod Clamp
Piston Rod Eye Stud
Cylinder Mounting and Bushing Stud
Cylinder Piston
Control Valve Body
Valve Spool
I looked at a semi-recent post but did not get the clarity I'm looking for: https://www.ford-trucks.com/forums/1...ue-values.html
The front spindle arm to spindle lists a torque spec of 165 ft-lbs, however, it refers to a 7/8-16 bolt. My bolts are 3/4 in-coarse thread (don't know pitch off-hand) I'm a bit worried about overstretching the bolt. That seems like a high value to me.
Additionally, looking at the previous page for Steering Linkage Torque Limits, I don't recognize the nomenclature in many of the items for instance:
Spindle Connecting Rod Clamp
Piston Rod Eye Stud
Cylinder Mounting and Bushing Stud
Cylinder Piston
Control Valve Body
Valve Spool
I looked at a semi-recent post but did not get the clarity I'm looking for: https://www.ford-trucks.com/forums/1...ue-values.html
Lead Gopher
Joined: Aug 2012
Posts: 10,049
Likes: 1,603
From: Seattle
Might want to say what year and series truck you have.
I'm used to OHM being an electrical term dealing with resistance values. Can you expand on that acronym so I can determine if I have the same here to refer to?
All I can come up with so far is Owner’s Handbook Manual but that's a wild guess right now.
I'm used to OHM being an electrical term dealing with resistance values. Can you expand on that acronym so I can determine if I have the same here to refer to?
All I can come up with so far is Owner’s Handbook Manual but that's a wild guess right now.
Lead Gopher
Joined: Aug 2012
Posts: 10,049
Likes: 1,603
From: Seattle
I do see recommended torque specs for 3/4 - 10 (that's coarse thread) bolts on various things with values up to 220 ft. lbs. like the Radius Arm to Front Axle bolts that I've torqued on my truck with no issues so generally speaking 165 isn't all that much. Well within a Grade 5 or Grade 8 bolt spec. - in that size bolt Grade 5 can go to 235 ft. lbs. while Grade 8 can handle up to 325 ft. lbs. torque. My biggest torque wrench goes to 250 ft. lbs.
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Mountain Pass
Joined: Apr 2011
Posts: 155
Likes: 77
From: marin co., california
Thanks for the reply. I have a 65 F100. Sorry, but I thought OHM was universal. In the aviation repair and overhaul business it stands for Overhaul Manual. I suppose I'll need a bigger torque wrench. I'm pretty sure my bolts are original to this truck.
Logistics Pro
Joined: May 2015
Posts: 4,466
Likes: 959
From: Tri Cities, TN
Cad plating has been unavailable in the whole country for at least the last 25 years. Thanks to the EPA. Disband the EPA!
You need to look more closely at the specifications and make sure it applies to an F100 some of the things you listed are for large trucks.
You need to look more closely at the specifications and make sure it applies to an F100 some of the things you listed are for large trucks.
Lead Gopher
Joined: Aug 2012
Posts: 10,049
Likes: 1,603
From: Seattle
The EPA and OSHA have imposed strict regulations due to cadmium’s toxicity, but they haven’t banned it outright.
California has the toughest restrictions, which is why many plating shops there no longer offer cadmium unless they’re NADCAP-certified or serving defense contracts.
Across the U.S., NADCAP-accredited facilities still perform cad plating for:
Aircraft components
Military hardware
Archival restoration (when spec-correct finishes are required)
I just called BHC Industries in Compton, CA and they do cad plating and do work with the general public. I seriously just called them and made sure.
If you have Aerospace parts West Valley Plating in Chatsworth, CA will work with you, but they don't do automotive parts.
There are probably others as well, but BHC sounded promising.
Thread Starter
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Mountain Pass
Joined: Apr 2011
Posts: 155
Likes: 77
From: marin co., california
Thanks for taking the time to clarify about the Cd plating availability. The coating shop I use in Hayward CA told me they stopped doing it about 10 years ago and I was lead to believe it was a statewide ban. I had a lot of nuts and bolts from my 66 F250 Cd plated by them about 15 years ago and they are still bright and shiny looking and I live adjacent to the salty air of the SF Bay.
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