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Old 01-12-2019, 10:03 PM   #43
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The 43 foot Spartan is a little to the bouncy side. Updated shocks helped, 19ís have them standard. 115 seems high especially with bike and lift on the back
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Old 01-13-2019, 05:27 AM   #44
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Stuart is correct. 115 is high, especially with the Harley on the back. The Harley is acting as a counter balance. I would drop the front to 105 and see how it handles. Keep in mind that the tire pressures go up significantly when they come up to running temperature, possibly as much as an additional 10 psi in warmer weather. Underinflated is more dangerous than overinflated, but you are not in a danger zone unless you are VERY heavily loaded on the front axle.
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Old 01-13-2019, 05:56 AM   #45
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The increase in pressure as the tires heat up when driving is normal and expected, and should not be factored into the tire inflation which should always be based on cold tire pressures.

As for wandering with a Spartan chassis, this is not normal. My 2013 Spartan chassis coach drives like it is on rails, and many other Spartan owners of all makes and years say the same thing. With a 2019 coach your chassis is under warranty and you should be in close contact with Spartan to get this resolved. They are very good to deal with and they will help you get it analyzed and corrected. Have you had the coach weighed (individual corner weights) with the Harley on the back? Since the weight of Harley is a change from the designed weight distribution, I should think this is an important step towards resolving the issue. Another important thing is to check the ride height under these conditions.
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Old 01-13-2019, 06:22 AM   #46
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Originally Posted by MRUSA14 View Post
The increase in pressure as the tires heat up when driving is normal and expected, and should not be factored into the tire inflation which should always be based on cold tire pressures.

As for wandering with a Spartan chassis, this is not normal. My 2013 Spartan chassis coach drives like it is on rails, and many other Spartan owners of all makes and years say the same thing. With a 2019 coach your chassis is under warranty and you should be in close contact with Spartan to get this resolved. They are very good to deal with and they will help you get it analyzed and corrected. Have you had the coach weighed (individual corner weights) with the Harley on the back? Since the weight of Harley is a change from the designed weight distribution, I should think this is an important step towards resolving the issue. Another important thing is to check the ride height under these conditions.
Mr USA14 is also correct. The increase in tire pressure is normal and expected. That is why I specifically stated that I would recommend 105 psi. I did not intend for you to drop below 105 psi. Hope this will cure any confusion. As stated in previous posts a sure cure would be for you to have it corner weighed to find the correct tire pressure, set the ride height, and do alignment. All part of the FUN of a coach.

Bob
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Old 01-13-2019, 09:18 AM   #47
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Mr USA14 is also correct. The increase in tire pressure is normal and expected. That is why I specifically stated that I would recommend 105 psi. I did not intend for you to drop below 105 psi. Hope this will cure any confusion. As stated in previous posts a sure cure would be for you to have it corner weighed to find the correct tire pressure, set the ride height, and do alignment. All part of the FUN of a coach.



Bob


Bob is correct, and to take one step further, I would weigh it with the Harley on the lift.
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Old 01-14-2019, 06:34 PM   #48
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Well I had my 2018 DS alignment today at Josams in Orlando. They shaved the front tires too, and I tell you what this coach drives like no other Motorhome Iíve own. Itís just amazing how easy it is to drive. No more bounce up and down in my windshield shade and it goes as straight down the road as a car.
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Old 01-14-2019, 08:38 PM   #49
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Well I had my 2018 DS alignment today at Josams in Orlando. They shaved the front tires too, and I tell you what this coach drives like no other Motorhome Iíve own. Itís just amazing how easy it is to drive. No more bounce up and down in my windshield shade and it goes as straight down the road as a car.
Shaved the tires? Why and what did they measure to be able to shave the tires? How much was the alignment off?
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Old 01-15-2019, 03:41 AM   #50
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Are you going to Josams. If you are your Coach will drive like it should
Just be sure that when they are done that your Steering Wheel is absolutely centered. If not is will cause the Comfort Drive to initially fight the off center of the Steering Wheel.
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Old 01-15-2019, 03:55 PM   #51
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Just be sure that when they are done that your Steering Wheel is absolutely centered. If not is will cause the Comfort Drive to initially fight the off center of the Steering Wheel.
My wheel was off center but we recentered it but your statement puzzles me. The front end bc will center no matter how the steering wheel is placed on the wheel stem.
We are going to Josams.
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Old 01-17-2019, 03:47 PM   #52
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I put a stablizer spring and bar on my Ford V10 and it made a world of difference
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Old 01-17-2019, 04:01 PM   #53
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2019 DSDP first trip and I have to steer constantly due to road wander. I have the comfort drive up full and no wind but it takes constant steering input to keep in the lane.
This is my third coach and first Spartan but I've never before had to concentrate so intensely on keeping in the lane.
Any thoughts? I've scheduled a front end alignment.
Had same problem. When big rigs passed on left, would throw me partly onto shoulder. Donít get me started on wind. Went to Hendersonís in Grants Pass, OREGON. Installed sway bars. Problem solved. Check them out online.
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Old 01-17-2019, 04:04 PM   #54
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Had same problem. When big rigs passed on left, would throw me partly onto shoulder. Donít get me started on wind. Went to Hendersonís in Grants Pass, OREGON. Installed sway bars. Problem solved. Check them out online.
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Old 01-17-2019, 04:05 PM   #55
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Had same problem. When big rigs passed on left, would throw me partly onto shoulder. Don’t get me started on wind. Went to Henderson’s in Grants Pass, OREGON. Installed sway bars. Problem solved. Check them out online.
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Old 01-17-2019, 04:14 PM   #56
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Had same problem. When big rigs passed on left, would throw me partly onto shoulder. Donít get me started on wind. Went to Hendersonís in Grants Pass, OREGON. Installed sway bars. Problem solved. Check them out online.
Comfort drive on Newmar coaches makes this unnecessary.
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