Popular Post JoeH Posted March 5, 2019 Popular Post Share Posted March 5, 2019 Goes out nearly every day during the concrete season. Had roughly 350k miles when my dad bought it in 1986, we have put another 200k trolling around in our 15 mile delivery radius. Last thing the engine needed was a piston and cylinder head when it dropped a valve seat 8 or 9 years ago. How's that for up time? 5 Quote Link to comment https://www.bigmacktrucks.com/topic/55962-1979-r686st-in-working-clothes/ Share on other sites More sharing options...
mackey58 Posted March 5, 2019 Share Posted March 5, 2019 Nice !!!! When trucks were made to last. My boss bought our 90 RD690S with 348ooo on it ran it two years overhauled it it now has395000 on it it runs everyday not far but comes home under its own power lol Quote Link to comment https://www.bigmacktrucks.com/topic/55962-1979-r686st-in-working-clothes/#findComment-417321 Share on other sites More sharing options...
mackey58 Posted March 5, 2019 Share Posted March 5, 2019 It was parked in a locals barn in 2004 and we bought it in 2014.checked the oil put new batteries in it fired right up.its a good old truck the other driver doesn't like it but it fits me no air em6 300l 7speed and haul the same number of loads as he does except 2.5 ton more cause I'm pulling a 1979 axle alum framless lol 1 Quote Link to comment https://www.bigmacktrucks.com/topic/55962-1979-r686st-in-working-clothes/#findComment-417322 Share on other sites More sharing options...
carlotpilot Posted March 5, 2019 Share Posted March 5, 2019 no mistaking that one was put together to work Quote Link to comment https://www.bigmacktrucks.com/topic/55962-1979-r686st-in-working-clothes/#findComment-417335 Share on other sites More sharing options...
xdudebrahx Posted March 5, 2019 Share Posted March 5, 2019 I used to gawk at your stuff when I delivered auto parts to the collision shop next door to your yard. Cool to see you made it here! Quote Link to comment https://www.bigmacktrucks.com/topic/55962-1979-r686st-in-working-clothes/#findComment-417341 Share on other sites More sharing options...
JoeH Posted March 5, 2019 Author Share Posted March 5, 2019 😛 nice to see someone local whos seen our trucks! The collision center is one of our numerous tenants, we own and rent out the 7 acres it's on. Quote Link to comment https://www.bigmacktrucks.com/topic/55962-1979-r686st-in-working-clothes/#findComment-417352 Share on other sites More sharing options...
wingman Posted March 6, 2019 Share Posted March 6, 2019 Joe H, I grew-up not far from Chalfont in Holicong! Quote Link to comment https://www.bigmacktrucks.com/topic/55962-1979-r686st-in-working-clothes/#findComment-417361 Share on other sites More sharing options...
JoeH Posted March 6, 2019 Author Share Posted March 6, 2019 Another local boy! We deliver to holicong on occasion! Bucks county is a nice area. Rob, I like the old style R hood on tandem axle trucks but prefer the new style hood on triaxles. Most of all, I love how the old maxidynes pull. The endt676 in that '79 is very well suited to that truck at a max 52,000 lbs. We just picked up a 1988 em6-300l, won't know for a few months how it compares to the endt676 because we're renovating a mixer to go on it. Quote Link to comment https://www.bigmacktrucks.com/topic/55962-1979-r686st-in-working-clothes/#findComment-417364 Share on other sites More sharing options...
hicrop10 Posted March 6, 2019 Share Posted March 6, 2019 I’m right around the corner,grow up in Huntingdon valley. Quote Link to comment https://www.bigmacktrucks.com/topic/55962-1979-r686st-in-working-clothes/#findComment-417366 Share on other sites More sharing options...
JoeH Posted March 6, 2019 Author Share Posted March 6, 2019 23 minutes ago, hicrop10 said: I’m right around the corner,grow up in Huntingdon valley. Still in Huntingdon valley? Quote Link to comment https://www.bigmacktrucks.com/topic/55962-1979-r686st-in-working-clothes/#findComment-417377 Share on other sites More sharing options...
xdudebrahx Posted March 6, 2019 Share Posted March 6, 2019 Didn't you guys have 1 or 2 DMs as well? Theres a bunch of local guys here. I grew up in Warrington and I'm in willow grove now. Quote Link to comment https://www.bigmacktrucks.com/topic/55962-1979-r686st-in-working-clothes/#findComment-417389 Share on other sites More sharing options...
JoeH Posted March 6, 2019 Author Share Posted March 6, 2019 We just retired the 1980 DM686sx, the rear of the frame is cracked horizontally about 8 feet from rust. Refurbishing the mixer to go on a 1988 RD690S with new frame rails; used to be an H&K truck. Quote Link to comment https://www.bigmacktrucks.com/topic/55962-1979-r686st-in-working-clothes/#findComment-417391 Share on other sites More sharing options...
terry Posted March 6, 2019 Share Posted March 6, 2019 1 hour ago, JoeH said: We just retired the 1980 DM686sx, the rear of the frame is cracked horizontally about 8 feet from rust. Refurbishing the mixer to go on a 1988 RD690S with new frame rails; used to be an H&K truck. new rails, sounds like a major undertaking, should make a real good truck for a lot of years, probably worth the hassle to stay away from all the emission problems. terry👍👍 Quote Link to comment https://www.bigmacktrucks.com/topic/55962-1979-r686st-in-working-clothes/#findComment-417404 Share on other sites More sharing options...
Rich Reinhart Posted March 7, 2019 Share Posted March 7, 2019 On 3/5/2019 at 7:02 AM, JoeH said: Goes out nearly every day during the concrete season. Had roughly 350k miles when my dad bought it in 1986, we have put another 200k trolling around in our 15 mile delivery radius. Last thing the engine needed was a piston and cylinder head when it dropped a valve seat 8 or 9 years ago. How's that for up time? I`ve seen your truck driving around Bucks County 1 Quote Still the Greatest Name in Trucks...Bulldogs rule, The rest drool....Member ATHS and ATCA... Link to comment https://www.bigmacktrucks.com/topic/55962-1979-r686st-in-working-clothes/#findComment-417472 Share on other sites More sharing options...
hicrop10 Posted March 7, 2019 Share Posted March 7, 2019 In Somerton now but will be going back to hv. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/55962-1979-r686st-in-working-clothes/#findComment-417479 Share on other sites More sharing options...
JoeH Posted March 7, 2019 Author Share Posted March 7, 2019 22 hours ago, terry said: new rails, sounds like a major undertaking, should make a real good truck for a lot of years, probably worth the hassle to stay away from all the emission problems. terry👍👍 H&K put the new rails in, not us! Rails are probably 5 years old! They traded 60 old trucks in as part of a deal with Coopersburg Kenworth for new trucks. This is one of the better trucks they traded in. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/55962-1979-r686st-in-working-clothes/#findComment-417502 Share on other sites More sharing options...
Red Horse Posted March 7, 2019 Share Posted March 7, 2019 3 hours ago, JoeH said: H&K put the new rails in, not us! Rails are probably 5 years old! They traded 60 old trucks in as part of a deal with Coopersburg Kenworth for new trucks. This is one of the better trucks they traded in. Love that green! Got the H & K color code from Art for my B! Quote Link to comment https://www.bigmacktrucks.com/topic/55962-1979-r686st-in-working-clothes/#findComment-417529 Share on other sites More sharing options...
Rich Reinhart Posted March 9, 2019 Share Posted March 9, 2019 On 3/7/2019 at 6:57 AM, JoeH said: H&K put the new rails in, not us! Rails are probably 5 years old! They traded 60 old trucks in as part of a deal with Coopersburg Kenworth for new trucks. This is one of the better trucks they traded in. Yeah i saw that old HK iron heading up 309.. Kind of sad actually... Quote Still the Greatest Name in Trucks...Bulldogs rule, The rest drool....Member ATHS and ATCA... Link to comment https://www.bigmacktrucks.com/topic/55962-1979-r686st-in-working-clothes/#findComment-417801 Share on other sites More sharing options...
JoeH Posted March 9, 2019 Author Share Posted March 9, 2019 Some of those trucks were really rough. This one will get painted white and should give us a couple decades of service at the least. I expect some of the others will make their way into similar hands. Or they'll go to the Coopersburg Kenworth salvage yards for parts so we can all keep our old trucks running, because we all know Volvo won't help us out with these old trucks.... Quote Link to comment https://www.bigmacktrucks.com/topic/55962-1979-r686st-in-working-clothes/#findComment-417803 Share on other sites More sharing options...
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