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Valve And Injector Service 60 Series
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We are fortunate enough to have Detroit pretty close to our shop. They will come on site and do valve adjustments, tuneups and in some cases major engine work on site so we can assure the customer it’s staying locked onto power and the “house” is taken care of.
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Dick: Guess you’re a belt and suspenders kind of guy…LOL.
It would actually be nice to have both on my coach as I’m generally 60-70,000# gross. I use 250F as my target for max trans temp but there’s one grade in particular I descend in 4th and have to stop in the middle to cool trans because my overheat warning light comes on even though my dash readout shows about 250. I also have to change synthetic atf at intervals between 25-50,000 mi.
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Joel: Not usually a B&S guy … I just like the sound the Jake brake makes. I’m also going to add a train horn for the same reason.
You pull a heavy load, more than most of us. Have you thought about pulling all that weight through a single differential? I would think that most semi’s pulling that kind of load pull it through two differentials and spread the torque, wear, and tear over the two diffs. Do you have a differential temp gauge on your coach? Does the gear lube temp climb on the way up? or way down?
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If you want the overhead done, contact Kyle at Tradewinds. When we had the Maintenance Seminar at Tradewinds, the Detroit folks were there every day on site to take care of the various needs folks had.
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Yes, I installed a diff temp gauge and don’t generally have a problem with hills but rather high speed (70-75mph). I occasionally need to reduce cruising speed as low as 65 to keep diff oil at or below about 250F. If I just kept my foot in it at 75mph in 90F heat, I can easily exceed 300F.
I have:
1. removed the full width rear mud flap for airflow
2. changed to synthetic oil (changing about every 25-30K miles, confirmed necessary)
3. gone to super single tires/wheels on drive to get more airflow over bearings/seals. Used to have drive axle seals fail every 50K like clockwork. Assumed it was a heat problem but a brand change on the seal helped.
Still on the original diff at 240K miles but I just had pinion seal replaced. For people who use these buses as heavy haulers, I think this is the most overlooked weak point.
I have toyed with the idea of installing a racing style diff oil cooler but..
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I run a differential cooler with a pinion shaft, belt driven pulley on all the race cars (Cup and ARCA, high hp, heavy cars, always under heavy acceleration and decel), never had a problem.
Had a 12 volt pump on the Jericho transmissions with a cooler. Most of the races were 30 minutes, trans guy said for thirty minutes of road racing, not to worry about it so I removed. No apparent impact on the trans. The newer T101A’s often has an internal pump, so I don’t think about it.
I don’t think it would hurt if you installed a differential cooler, but you’re introducing another system to maintain and could fail in a bad place. The most important thing you’ve done is to have a diff temp gauge. With that you can monitor the temp, adjust your driving accordingly, and be alerted to a problem.
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Precisely. And, as I age, I find myself stopping a little more frequently to restore fluid balances and the diff oil temp drops pretty quickly when stopped.
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