keg1 Posted July 9, 2016 Share Posted July 9, 2016 Had the wife pick me up a rear main seal for my r model. Does anyone know if the wear rings are now some kind of plastic instead of metal? Quote Link to comment https://www.bigmacktrucks.com/topic/45967-rear-main-seal/ Share on other sites More sharing options...
fjh Posted July 9, 2016 Share Posted July 9, 2016 (edited) Nope still metal! What you likely got is a teflon seal no wiper good seal but hard to install Edited July 9, 2016 by fjh Quote Link to comment https://www.bigmacktrucks.com/topic/45967-rear-main-seal/#findComment-338808 Share on other sites More sharing options...
keg1 Posted July 9, 2016 Author Share Posted July 9, 2016 Thanks I didn't think it looked right Quote Link to comment https://www.bigmacktrucks.com/topic/45967-rear-main-seal/#findComment-338814 Share on other sites More sharing options...
kscarbel2 Posted July 9, 2016 Share Posted July 9, 2016 Did your wife receive a 446GC310P10 ? I assume you want the wide wear band seal kit, 57GC186A. The narrow wear band kit, 57GC187A, was for older crankshafts with an oil slinger. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/45967-rear-main-seal/#findComment-338827 Share on other sites More sharing options...
keg1 Posted July 9, 2016 Author Share Posted July 9, 2016 (edited) The number on the invoice is 446GC00310P1. The number on the seal is 446GC3118. The number on my old seal is 446GC238. This is a picture of the new seal and what looks like a plastic wear ring. I've never put one of these in before and I only want to do it once so I want to make sure I have the right part. Edited July 9, 2016 by keg1 Quote Link to comment https://www.bigmacktrucks.com/topic/45967-rear-main-seal/#findComment-338856 Share on other sites More sharing options...
kscarbel2 Posted July 9, 2016 Share Posted July 9, 2016 Okay, your wife was given a [meaningless Volvo Group global part number] 20705740 teflon rear main seal, which is the same as the old "Mack" part number 446GC310P10. (That plastic band is not a wear band). But it sounds like you'd rather have a 57GC186A. Quote Link to comment https://www.bigmacktrucks.com/topic/45967-rear-main-seal/#findComment-338859 Share on other sites More sharing options...
keg1 Posted July 10, 2016 Author Share Posted July 10, 2016 Okay thanks, I didn't think it looked right but nowadays you never know. Quote Link to comment https://www.bigmacktrucks.com/topic/45967-rear-main-seal/#findComment-338898 Share on other sites More sharing options...
Back In Black Pulling Posted July 10, 2016 Share Posted July 10, 2016 I believe the plastic band is to install the seal so you don't rip it . should push threw when you push over crank. One of the e9 seals comes with that in. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/45967-rear-main-seal/#findComment-338958 Share on other sites More sharing options...
keg1 Posted July 10, 2016 Author Share Posted July 10, 2016 On 7/9/2016 at 10:23 PM, kscarbel2 said: Okay, your wife was given a [meaningless Volvo Group global part number] 20705740 teflon rear main seal, which is the same as the old "Mack" part number 446GC310P10. (That plastic band is not a wear band). But it sounds like you'd rather have a 57GC186A. Expand What is the difference between the 57GC186A and a 57GC186B? Quote Link to comment https://www.bigmacktrucks.com/topic/45967-rear-main-seal/#findComment-338960 Share on other sites More sharing options...
keg1 Posted July 10, 2016 Author Share Posted July 10, 2016 On 7/10/2016 at 11:43 PM, Back In Black Pulling said: I believe the plastic band is to install the seal so you don't rip it . should push threw when you push over crank. One of the e9 seals comes with that in. Expand Makes sense I wasn't sure what it was. Never replaced one before so just checking. The old one has a wear ring so that's what I would like to put back in it. It doesn't have the original engine so vin number does parts guys no good. Quote Link to comment https://www.bigmacktrucks.com/topic/45967-rear-main-seal/#findComment-338962 Share on other sites More sharing options...
kscarbel2 Posted July 11, 2016 Share Posted July 11, 2016 On 7/10/2016 at 11:55 PM, keg1 said: What is the difference between the 57GC186A and a 57GC186B? Expand In the world of the former Mack Trucks, with a part numbering system never equaled, a suffix letter like "A" or "B" denotes an engineering improvement. It used to be "A" for years. Under Volvo, "B" might mean they made it "cheaper", though your price still went up. Quote Link to comment https://www.bigmacktrucks.com/topic/45967-rear-main-seal/#findComment-338963 Share on other sites More sharing options...
keg1 Posted July 11, 2016 Author Share Posted July 11, 2016 Ok thanks I googled the number and Worldwide Equip had the b one listed for all E6 engines wasn't sure if they were the same or not. I'll get one tomorrow. Thanks again. Quote Link to comment https://www.bigmacktrucks.com/topic/45967-rear-main-seal/#findComment-338964 Share on other sites More sharing options...
kscarbel2 Posted July 11, 2016 Share Posted July 11, 2016 On 7/11/2016 at 12:08 AM, keg1 said: Ok thanks I googled the number and Worldwide Equip had the b one listed for all E6 engines wasn't sure if they were the same or not. I'll get one tomorrow. Thanks again. Expand We aim to please. Glad you're all set. Quote Link to comment https://www.bigmacktrucks.com/topic/45967-rear-main-seal/#findComment-338965 Share on other sites More sharing options...
ardakota Posted July 12, 2016 Share Posted July 12, 2016 I dont know if the rear is the same as the front but the front i replaced with the new type seal on an e7 and mack has you install it a little bit farther in to ride on a new surface on your crank and the little plastic ring is only to be remove from seal when your putting it in its to keep the seal from deforming. There might be a bulletin on the rear main seal I dont know there was for the front. Quote Link to comment https://www.bigmacktrucks.com/topic/45967-rear-main-seal/#findComment-339060 Share on other sites More sharing options...
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