---------------------------------------------------------- Lightning-List Digest Archive --- Total Messages Posted Sun 02/24/13: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:14 AM - Re: Matco brakes question (Bob Haas) 2. 12:27 PM - Re: Matco brakes question (GARY BARNETT) 3. 01:27 PM - Re: Matco brakes question (Geoff Eather) 4. 03:43 PM - Re: Matco brakes question (Tex Mantell) 5. 06:46 PM - Re: Matco brakes question (n5pb@AOL.COM) ________________________________ Message 1 _____________________________________ Time: 05:14:55 AM PST US From: "Bob Haas" Subject: Re: Lightning-List: Matco brakes question I'm using Allen head cap screws with washers as supplied by MATCO a year ago. no more separation on sand 1943 concrete runways. Bob Haas #41 N330BH -----Original Message----- From: Bill Strahan Sent: Saturday, February 23, 2013 2:34 PM Subject: Lightning-List: Matco brakes question I had a couple of the bolts that hold the disk on the wheel break recently. I had the old style safety-wired bolts. I ordered and received the upgraded wheels from Matco along with the new button head screws and washers. Nick had told me to have a good quality hex driver and torque wrench, which I thought I had. On the third bolt, the head easily stripped before 80 inch-lbs. :( Well, I have some of the previous cap head screws, and I'm curious if anyone sees a reason not to use one. In fact, I'd rather have cap head screws all the way around. These 1/8" drive button head screws are just too small in my opinion. I don't want to be jacking with or worrying about this every time the wheels come off. So, question 1: Does anyone know why the switch to button head? Question 2: Any reason not to stick with the cap head? Question 3: If I use the cap head will that work with the new Nord Lock washers, or just keep safety wiring? (I'm somewhat partial to the safety wire, as it seems pretty fool proof.) It's a gorgeous day in Dallas, and I want to go flying. I must have done something wrong to someone to have a problem with the last bolt before putting wheel pants on and going. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=394873#394873 ________________________________ Message 2 _____________________________________ Time: 12:27:50 PM PST US From: GARY BARNETT Subject: RE: Lightning-List: Matco brakes question Bill I had the same problem with the Matco furnished button heads stripping out. Matco sent some new ones but they were also soft. I bought some but ton head screws identical to the Matco ones at ACE hardware. They gave me no trouble torquing them to 80 inch pounds. They have been holding the dis ks on for 150 hours with no trouble. Gary Barnett N335AL SN133 > Subject: Lightning-List: Matco brakes question > From: bill@gdsx.com > Date: Sat=2C 23 Feb 2013 11:34:34 -0800 > To: lightning-list@matronics.com > > > I had a couple of the bolts that hold the disk on the wheel break recentl y. I had the old style safety-wired bolts. > > I ordered and received the upgraded wheels from Matco along with the new button head screws and washers. Nick had told me to have a good quality he x driver and torque wrench=2C which I thought I had. On the third bolt=2C the head easily stripped before 80 inch-lbs. :( > > Well=2C I have some of the previous cap head screws=2C and I'm curious if anyone sees a reason not to use one. In fact=2C I'd rather have cap head screws all the way around. These 1/8" drive button head screws are just to o small in my opinion. I don't want to be jacking with or worrying about t his every time the wheels come off. > > So=2C question 1: Does anyone know why the switch to button head? > Question 2: Any reason not to stick with the cap head? > Question 3: If I use the cap head will that work with the new Nord Lock washers=2C or just keep safety wiring? (I'm somewhat partial to the safety wire=2C as it seems pretty fool proof.) > > It's a gorgeous day in Dallas=2C and I want to go flying. I must have do ne something wrong to someone to have a problem with the last bolt before p utting wheel pants on and going. > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=394873#394873 > > > > > > > =========== =========== =========== =========== > > > ________________________________ Message 3 _____________________________________ Time: 01:27:36 PM PST US Subject: Re: Lightning-List: Matco brakes question From: Geoff Eather Bill, Same problem early in my test program - brake disc separated and required a replacement wheel. Matco confirmed that 80 inch pounds was the correct torque for the button head bolts. This seemed too tight to me, even though the originals (with Nord Lock washers) came loose. And like yourself, I did strip one head before 80 inch pounds when assembling the new wheel. Was lucky I had a spare bolt. Current button head bolts with Nord Lock washers seem to be fine after about 30 hours flight time. Cheers Geoff Eather (Kit 127) Australia On 24/02/2013, at 6:34 AM, Bill Strahan wrote: > > I had a couple of the bolts that hold the disk on the wheel break recently. I had the old style safety-wired bolts. > > I ordered and received the upgraded wheels from Matco along with the new button head screws and washers. Nick had told me to have a good quality hex driver and torque wrench, which I thought I had. On the third bolt, the head easily stripped before 80 inch-lbs. :( > > Well, I have some of the previous cap head screws, and I'm curious if anyone sees a reason not to use one. In fact, I'd rather have cap head screws all the way around. These 1/8" drive button head screws are just too small in my opinion. I don't want to be jacking with or worrying about this every time the wheels come off. > > So, question 1: Does anyone know why the switch to button head? > Question 2: Any reason not to stick with the cap head? > Question 3: If I use the cap head will that work with the new Nord Lock washers, or just keep safety wiring? (I'm somewhat partial to the safety wire, as it seems pretty fool proof.) > > It's a gorgeous day in Dallas, and I want to go flying. I must have done something wrong to someone to have a problem with the last bolt before putting wheel pants on and going. > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=394873#394873 > > > > > > > > > > ________________________________ Message 4 _____________________________________ Time: 03:43:54 PM PST US From: "Tex Mantell" Subject: Re: Lightning-List: Matco brakes question Bill, I am sticking with the cap screws and safety wire. Tex ----- Original Message ----- From: "Geoff Eather" Sent: Sunday, February 24, 2013 4:24 PM Subject: Re: Lightning-List: Matco brakes question > > > Bill, > > Same problem early in my test program - brake disc separated and required > a replacement wheel. > > Matco confirmed that 80 inch pounds was the correct torque for the button > head bolts. This seemed too tight to me, even though the originals (with > Nord Lock washers) came loose. > > And like yourself, I did strip one head before 80 inch pounds when > assembling the new wheel. Was lucky I had a spare bolt. > > Current button head bolts with Nord Lock washers seem to be fine after > about 30 hours flight time. > > Cheers > > Geoff Eather (Kit 127) Australia > > > On 24/02/2013, at 6:34 AM, Bill Strahan wrote: > >> >> I had a couple of the bolts that hold the disk on the wheel break >> recently. I had the old style safety-wired bolts. >> >> I ordered and received the upgraded wheels from Matco along with the new >> button head screws and washers. Nick had told me to have a good quality >> hex driver and torque wrench, which I thought I had. On the third bolt, >> the head easily stripped before 80 inch-lbs. :( >> >> Well, I have some of the previous cap head screws, and I'm curious if >> anyone sees a reason not to use one. In fact, I'd rather have cap head >> screws all the way around. These 1/8" drive button head screws are just >> too small in my opinion. I don't want to be jacking with or worrying >> about this every time the wheels come off. >> >> So, question 1: Does anyone know why the switch to button head? >> Question 2: Any reason not to stick with the cap head? >> Question 3: If I use the cap head will that work with the new Nord Lock >> washers, or just keep safety wiring? (I'm somewhat partial to the safety >> wire, as it seems pretty fool proof.) >> >> It's a gorgeous day in Dallas, and I want to go flying. I must have done >> something wrong to someone to have a problem with the last bolt before >> putting wheel pants on and going. >> >> >> >> >> Read this topic online here: >> >> http://forums.matronics.com/viewtopic.php?p=394873#394873 >> >> >> >> >> >> >> >> >> >> > > > ________________________________ Message 5 _____________________________________ Time: 06:46:55 PM PST US Subject: Re: Lightning-List: Matco brakes question From: n5pb@AOL.COM Bill, I too received the new button head screws after MATCO service bulletin came out a couple of years ago. I've not had any problem to torque them to th e 80 in Lbs. Also, I have had the wheels off several times and each time I installed with new button head screws and washers without incident. Bear -----Original Message----- From: Bill Strahan Sent: Sat, Feb 23, 2013 2:39 pm Subject: Lightning-List: Matco brakes question I had a couple of the bolts that hold the disk on the wheel break recently. I had the old style safety-wired bolts. I ordered and received the upgraded wheels from Matco along with the new bu tton head screws and washers. Nick had told me to have a good quality hex drive r and torque wrench, which I thought I had. On the third bolt, the head easily stripped before 80 inch-lbs. :( Well, I have some of the previous cap head screws, and I'm curious if anyon e sees a reason not to use one. In fact, I'd rather have cap head screws all the way around. These 1/8" drive button head screws are just too small in my opinion. I don't want to be jacking with or worrying about this every time the wheels come off. So, question 1: Does anyone know why the switch to button head? Question 2: Any reason not to stick with the cap head? Question 3: If I use the cap head will that work with the new Nord Lock washers, or just keep safety wiring? (I'm somewhat partial to the safety w ire, as it seems pretty fool proof.) It's a gorgeous day in Dallas, and I want to go flying. I must have done something wrong to someone to have a problem with the last bolt before putt ing wheel pants on and going. 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