saaboo
calif
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Joined: 10/12/2006
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we have a 2007 coachman 40' we have had this issue for over year. When you fire ups rig all pressures come up fine,coach looks ok. After driving to destination say 200 miles give or take the passenges front side has dropped 3" the drivers side if fine. We have taken in to service, they tell us theres nothing wrong or this last trip service man said he adj hyd pump in rear,thats what controls front? Air pressure on gauges are all set at 140. air bag on passenge side looks ok but it diff is not. We ar loosing pressure. But gauges are not showing it.? Anybody eles had these problems
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eHoefler
ozark mountains
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Joined: 10/22/2011
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Is the suspension loosing air after sitting for a while, or is it the hydraulic leveling system after set up?? Need a bit more information.
2010 Ram 3500, Crew Cab, Long bed, 4 x 4,Dually, Lights & Siren!
2006 40' Landmark Mt. Rushmore
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saaboo
calif
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The right front drop while driving took in service man says needs adj. So ok last weekend went on road trip 400 miles same problem.. Take it ba k today they said well i guess we need to replace cylinde? We wait c what tomorrow brings
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wolfe10
Texas
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Joined: 10/08/2000
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OK, let's look at this. Please VERIFY that you have two ride height valves on the rear axle and ONE on the front. If so, side sag needs to be addressed in the BACK.
If you have two ride height valves in front, indeed, have them adjusted.
Brett Wolfe
1997 Safari Sahara 3540
EX: 1993 Foretravel 36' U-240
FMCA Forum: www.community.fmca.com/index
Diesel RV Club:http://www.dieselrvclub.org/
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wolfe10
Texas
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First, 140 PSI is high-- verify with Freightliner, but likely the air governor needs to be adjusted (quick and easy).
And, as already suggested, your RIDE HEIGHT needs to be checked against spec. You have three ride height valves-- two on one axle and one on the other. They determine whether air is added to, let out or no change in air to the air bags.
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city slicker
dixons mills al
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Joined: 09/15/2006
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take it to freightliner and get ride control fix and check for leaks happen to my rig. do not take to rv dealer
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wolfe10
Texas
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You WILL have 3 ride height valves-- two on one axle (usually rear) and one in front, but that is not a hard and fast rule.
And 3" out of adjustment on the rear is a HUGE amount. With that 18" or so drive shaft, a change of 3" in ride height makes a substantial difference in drive line angles. Sure hope he had and set ride height to chassis maker's specs!
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Smittyy
Midwest
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Joined: 03/20/2005
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Ditto what City Slicker said the ride height valve on the right front needs to be replaced or repaired and it has to be checked for leaks.
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saaboo
calif
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This service guy, says coachman only put one on there coaches and its in the rear, so he adj it back on 4/4 which he side it was out of adj, and the coach now sets about 3 " higher at wheel wells. So we depart for short trip 400 miles round trip. SAME PROBLEM NOTHING FIXED. Returned to repair shop, oh did not work well ill replace valve. That should do it.???? I dont want to sound negitive but this has been going on for months. So tomorrow we are going to pickup our coach and go for a 100 mile ride to see what happens. Cross your fingers and toes :-)
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