Does Dexter Offer Different Materials For The Construction Of The Disc Brake Piston # 054-093-00

Updated 02/19/2025 | Published 01/11/2024

Products Featured in This Question

Replacement Disc Brake Piston for Dexter 8,000-lb Caliper

(2)

$50.89

Replacement Caliper for Dexter Disc Brakes - Left Hand or Right Hand - E-Coat - 8,000 lbs

(22)

$485.20

Question:

Does this piston come in a stainless steel version?

asked by: B

Expert Reply:

The Replacement Disc Brake Piston # 054-093-00 is the only one Dexter offers for their 8,000LB Caliper # K71-630.

expert reply by: Bud M

Barrett

2/16/2025

I could not find just the attachment bolts and the brake line that goes through the notch anywhere on your web. I tried the actual part number from dexter catalog, but nothing comes up. 1) 071-518-00 is the brake line. 4) 006-045-00 is the mounting bolt locking nut. 4) 007-254-00 is the mounting bolt. These are the only parts I need, but I need 6 sets of them. Also, do you know why these mounting bolts are always loose? the spec is 40 ft/lbs, yet on all 6 brakes, the bolts were either, missing, loose with no nut, or loose with nut. Is this a result of heat expansion and they are expected to be loose?

Jon G.

2/18/2025

@Barrett Looks like you need the following parts: - Replacement Crossover Hydraulic Brake Line # DX34FR - Replacement Hex Nut # T0797600 - Replacement Caliper Retaining Bolt # DX74HR They shouldn't be loose, no. Did you check on them regularly, or is this after years of use? Because that can be a factor as well.

Barrett

2/19/2025

@JonG This RV probably has less than 15k miles on it. Brake pads are probably about 66% remaining. No, this was after having Byerly RV repack my bearings, which they charged me 2 hours per wheel (which I found out is at least double what the going rate is), and in so doing of course, removed the calipers and then remounted them, I brought it back in after maybe 50 miles, and they told me some of the bolts were broken. When I told them they were the only ones who have ever worked on them, they shut up and said they would fix that for free.... Well, like most things free (not), my guess is that they over torqued or under torqued all the mounting bolts. My guess is (i'm an engineer) they over torqued them by not using a torque wrench, and therefore probably caused the heat expansion of the caliper casting to stretch the bolts beyond the yield point, therefore deforming them and leaving them loose. The spec for these calipers is 35 ft/lbs and that is not a lot of torque, I can just see them cranking down on these with a 1/2" ratchet...probably applying 60 ft/lbs. Thanks for part numbers, your agents could not find the bolt or nut part numbers and the brake line she was out of. So I ordered 6 brake lines from a Dexter Dealer in Ohio that I would not get in time, and then ordered two caliper replacements kits from etrailer so I could get the brake lines. So when I got to Austin at an RV part, had no brakes.... When I took the first wheel off (which was leaking like a sieve), I saw one bolt missing, the other next to it had no nut, and the crossover line was pouring brake fluid out. I decided to replace all 24 bolts and nuts. So essentially I performed a full brake rehab on a triple axle Riverstone in an RV Park near Austin, Tx. Turned out, two brake crossover lines were leaking badly, so I used both brake lines from the caliper kits, and since I could not get the bolts from anybody, I went to a bolt distributor in Austin and got 24 - 3/8" x 3.5" grade 8 bolts, with locking nuts, jam nut, and a bottle of lock tight. Those babies are not coming off this time... The original bolts are 3.25" long, and I could have used a 3", but that was a bit too short, and I was going to use jam nuts, so turned out that the 3.5" will work without interfering with the brake lines.

Jon G.

2/19/2025

@Barrett Wow, that is quite the adventure you've had! I'm glad you were able to safely make it to the RV park and that you have enough skill to get everything back up and running. Hopefully the parts list above will help others in the future, but for now I'm just happy to hear you were able to get some other parts to perform surgery on your RV.