03-04-2021, 01:57 PM
hi all,
i am posting this on winegrowers 2007 coach 1202
bob and sandy came to my place and we had their beautiful 4 slide 2007 newell in my shop for the last 2 weeks. they lived in the coach as it is quite nice inside the shop and they had full access to the bathroom and shower in my mancave.
i will try and post simple versions of what we did and learned. that said i will say bob had to do alot of the hard work as i am waiting to get a knee replaced soon. i kinda hobble around i think i probably have the only garage with a lazy boy right where we are working....ha
problem 1. drivers side rear drops all the way overnight. using my whisper sniffer and alot of kids bubbles in a spray bottle we found two things. the zf suspension with steerable tag has two airbags on the drive axle and 1 on the tag. the drive bag between the axles fitting on top of the bag was leaking. we replaced it. then we had to hunt for other leaks. we used my pressure test jig to isolate each section. we tested each airbag separately and they all held air with no leaks. the idea is to isolate each section and eliminate it for leaks.
the airbags for the drive axle are totally easy to get at. can change them without taking a wheel off easy. the one in front of the drive axle when we deflated it, separated from the top mounting plate. the mounting plate is just setting with a bead like seal on the top of the bag. to get it back up we took the bottom nut off that holds the bottom of the bag on, greased up the top plate and with air applied pushed the bag up, then aimed the bottom mounting plate back into the hole and walla....got it on. we got quite good at it i must say.
we tested from the six pack to the airbags....still a leak. the zf suspension has traction control that puts air in or takes air out of the bags on the rear. there is a traction control valve on each side in the rear. the one on the drivers side was leaking. they are unobtanium. called bendix, and there was non in north america. fortunately newell had two so bob had them overnighted (took 4 days). the valves are located near the tag up on a frame rail. fast forward to last nite and it held air up all night and no dropping. so we fixed that.
problem 2. passenger side rear ride height valve was escaping air out the exhaust port all the time even when we were NOT in travel mode. a short primer on ride height valves....avail elsewhere on the forum as well. 2 air lines on the rhv. one is constant air in. always air there if there is air in the system. the line on the rhv goes directly to the six pack. that line connects directly to the rear air bags on that side. if the rhv calls for air (in travel mode and coach is low on that side) then in travel mode the travel solenoids are engergized and open and the air flows from the air source on the rhv to the six pack and then directly to the 3 airbags on that rear side. if the rhv calls for air to be released because the coach is high on that side, then the bags escape air through the six pack to the rhv and exhausts out the bottom. a note on valid leveling system is that travel mode is called select on the six pack.
the rhv is totally accessible in front of the drive wheels on the side of the coach unlike our older ones.
only way for air to be escaping out the exhaust port is the valve is broken, or the travel solenoid is open some or a lot.
i had a spare rhv so we change that and tested the old one. it was working perfectly. so it had to be the travel solenoid (note to self....should have tried that first). the valid six packs are different than hwh. the valves have no valve body with orfice. the orfice is in the six pack itself. so you take the coil off and then take the stem out of the six pack like you would take the stem out of the valve body that on the hwh ones. use the same spanner wrench as for the hwh valve. bob got the passenger side travel (select) valve stem out and the orfice and plunger was all gunked up with debris. cleaned it up, put it back in and now no flow out of the rhv.
i learned a ton about the braking system on the 07. it is quite different than the one on my 02. i will write that up separately. we thought we might have had a problem with a ppv valve on bobs, but that ended up not being the case.
problem 3
120v compressor comes on every 5-10 minutes. the 07 has twin 120v compressors. you can choose to use one or the other. they are backups to each other. there is no 12v compressor like my 02.
we found a bad fitting on a distribution block on top of the front six pack behind the headlight. not much room up in their on this year coach. we found a bad fitting on the 120v compressor distribution block.
i found a leak on the regulator valve on the bode air entrance door. it is behind the laminate cover. it is a pricey little piece of plastic at 147 dollars from bode.
we went over every square inch of the coach that we could find air fittings. inside and out. the only things that are air powered are the airbags for the front mounted genny, the air horns, the entrance door and the two pocket doors. the potties are electric and so is the step cover. the supply air drops pretty quickly.
we took off each air line on the accessory tank in the rear and pressurized them separately with my test rig. there was one quarter inch line (all the rest were 3/8) that was leaking down fairly fast. we thought this was the quarter inch line from the front compressor but that was not the case. the quarter inch line from the compressor goes somewhere and converts to 3/8 then goes to the level tank and then a small line from the level tank to the accessory tank.
using my whisper sniffer and quarts of kids bubbles led to no further discoveries. so that mystery is for another time.
all of this could have been days shorter with an air system schematic from newell. but to no avail.
i am sure i missed alot, so bob please chime in. i know you replaced more fittings than i have mentions and you are the one who really got dirty. good think is he spent so much time scooting around on my floor that it is pretty clean now....ha
bob is a delight to work with and it was fun having him here.
thats all for now.
tom
i am posting this on winegrowers 2007 coach 1202
bob and sandy came to my place and we had their beautiful 4 slide 2007 newell in my shop for the last 2 weeks. they lived in the coach as it is quite nice inside the shop and they had full access to the bathroom and shower in my mancave.
i will try and post simple versions of what we did and learned. that said i will say bob had to do alot of the hard work as i am waiting to get a knee replaced soon. i kinda hobble around i think i probably have the only garage with a lazy boy right where we are working....ha
problem 1. drivers side rear drops all the way overnight. using my whisper sniffer and alot of kids bubbles in a spray bottle we found two things. the zf suspension with steerable tag has two airbags on the drive axle and 1 on the tag. the drive bag between the axles fitting on top of the bag was leaking. we replaced it. then we had to hunt for other leaks. we used my pressure test jig to isolate each section. we tested each airbag separately and they all held air with no leaks. the idea is to isolate each section and eliminate it for leaks.
the airbags for the drive axle are totally easy to get at. can change them without taking a wheel off easy. the one in front of the drive axle when we deflated it, separated from the top mounting plate. the mounting plate is just setting with a bead like seal on the top of the bag. to get it back up we took the bottom nut off that holds the bottom of the bag on, greased up the top plate and with air applied pushed the bag up, then aimed the bottom mounting plate back into the hole and walla....got it on. we got quite good at it i must say.
we tested from the six pack to the airbags....still a leak. the zf suspension has traction control that puts air in or takes air out of the bags on the rear. there is a traction control valve on each side in the rear. the one on the drivers side was leaking. they are unobtanium. called bendix, and there was non in north america. fortunately newell had two so bob had them overnighted (took 4 days). the valves are located near the tag up on a frame rail. fast forward to last nite and it held air up all night and no dropping. so we fixed that.
problem 2. passenger side rear ride height valve was escaping air out the exhaust port all the time even when we were NOT in travel mode. a short primer on ride height valves....avail elsewhere on the forum as well. 2 air lines on the rhv. one is constant air in. always air there if there is air in the system. the line on the rhv goes directly to the six pack. that line connects directly to the rear air bags on that side. if the rhv calls for air (in travel mode and coach is low on that side) then in travel mode the travel solenoids are engergized and open and the air flows from the air source on the rhv to the six pack and then directly to the 3 airbags on that rear side. if the rhv calls for air to be released because the coach is high on that side, then the bags escape air through the six pack to the rhv and exhausts out the bottom. a note on valid leveling system is that travel mode is called select on the six pack.
the rhv is totally accessible in front of the drive wheels on the side of the coach unlike our older ones.
only way for air to be escaping out the exhaust port is the valve is broken, or the travel solenoid is open some or a lot.
i had a spare rhv so we change that and tested the old one. it was working perfectly. so it had to be the travel solenoid (note to self....should have tried that first). the valid six packs are different than hwh. the valves have no valve body with orfice. the orfice is in the six pack itself. so you take the coil off and then take the stem out of the six pack like you would take the stem out of the valve body that on the hwh ones. use the same spanner wrench as for the hwh valve. bob got the passenger side travel (select) valve stem out and the orfice and plunger was all gunked up with debris. cleaned it up, put it back in and now no flow out of the rhv.
i learned a ton about the braking system on the 07. it is quite different than the one on my 02. i will write that up separately. we thought we might have had a problem with a ppv valve on bobs, but that ended up not being the case.
problem 3
120v compressor comes on every 5-10 minutes. the 07 has twin 120v compressors. you can choose to use one or the other. they are backups to each other. there is no 12v compressor like my 02.
we found a bad fitting on a distribution block on top of the front six pack behind the headlight. not much room up in their on this year coach. we found a bad fitting on the 120v compressor distribution block.
i found a leak on the regulator valve on the bode air entrance door. it is behind the laminate cover. it is a pricey little piece of plastic at 147 dollars from bode.
we went over every square inch of the coach that we could find air fittings. inside and out. the only things that are air powered are the airbags for the front mounted genny, the air horns, the entrance door and the two pocket doors. the potties are electric and so is the step cover. the supply air drops pretty quickly.
we took off each air line on the accessory tank in the rear and pressurized them separately with my test rig. there was one quarter inch line (all the rest were 3/8) that was leaking down fairly fast. we thought this was the quarter inch line from the front compressor but that was not the case. the quarter inch line from the compressor goes somewhere and converts to 3/8 then goes to the level tank and then a small line from the level tank to the accessory tank.
using my whisper sniffer and quarts of kids bubbles led to no further discoveries. so that mystery is for another time.
all of this could have been days shorter with an air system schematic from newell. but to no avail.
i am sure i missed alot, so bob please chime in. i know you replaced more fittings than i have mentions and you are the one who really got dirty. good think is he spent so much time scooting around on my floor that it is pretty clean now....ha
bob is a delight to work with and it was fun having him here.
thats all for now.
tom
2002 45'8" Newell Coach 608 Series 60 DDEC4/Allison World 6 Speed HD4000MH