Av8r3400 Posted April 25, 2018 Report Share Posted April 25, 2018 Taking note of Roger & Karen's issue with their "air-thingy" on the trip home, I have a remedial question: I carry a spare Air Governor in case of similar problems, but I honestly do not know where the unit is mounted on a Volvo 730. Can anyone point me in the right neighborhood of where it is on my truck? Thanks in advance. Quote Link to comment Share on other sites More sharing options...
Darryl&Rita Posted April 25, 2018 Report Share Posted April 25, 2018 On the air system.😂😂😂 In all seriousness, the govenor has been seen on the compressor, on the firewall beside the steering column, or mounted to the battery box. Quote Link to comment Share on other sites More sharing options...
Parrformance Posted April 25, 2018 Report Share Posted April 25, 2018 On the 780 it is mounted to the driver side firewall, just under the hood. Think Brake master cylinder location. Quote Link to comment Share on other sites More sharing options...
Parrformance Posted April 25, 2018 Report Share Posted April 25, 2018 I set up my spare with the plugs to match the one in the truck. Quick swap on the roadside. Quote Link to comment Share on other sites More sharing options...
DesertMiner Posted April 25, 2018 Report Share Posted April 25, 2018 (edited) 😎 Edited April 25, 2018 by DesertMiner Quote Link to comment Share on other sites More sharing options...
GlennWest Posted April 25, 2018 Report Share Posted April 25, 2018 Mine is built in. Not replaceable but serviceable. Quote Link to comment Share on other sites More sharing options...
Darryl&Rita Posted April 25, 2018 Report Share Posted April 25, 2018 It must be the only non-replaceable unit ever made. Quote Link to comment Share on other sites More sharing options...
Brad & Jacolyn Posted April 25, 2018 Report Share Posted April 25, 2018 On my 630 it is under the hood on the drivers side. If you have another one take it with you and go open the hood. It will be easier to recognize if you have one in your hand. Not hard to find. Brad Quote Link to comment Share on other sites More sharing options...
DesertMiner Posted April 25, 2018 Report Share Posted April 25, 2018 (edited) Edited April 25, 2018 by DesertMiner Silver looking item on top right of this photo. Quote Link to comment Share on other sites More sharing options...
rickeieio Posted April 25, 2018 Report Share Posted April 25, 2018 On my 770/ISX, it's on the back of the compressor, front left side of motor. On my Mack, it's on the passenger side firewall, but again, above the compressor. Quote Link to comment Share on other sites More sharing options...
GlennWest Posted April 25, 2018 Report Share Posted April 25, 2018 (edited) 3 hours ago, Darryl&Rita said: It must be the only non-replaceable unit ever made. It's made into the dryer assembly. Edited April 25, 2018 by GlennWest Quote Link to comment Share on other sites More sharing options...
Hewhoknowslittle Posted April 25, 2018 Report Share Posted April 25, 2018 1 hour ago, GlennWest said: It's made into the dryer assembly. Never seen one built in to the air dryer, but who knows? Quote Link to comment Share on other sites More sharing options...
GlennWest Posted April 25, 2018 Report Share Posted April 25, 2018 Yes, not in best place to get at either. Dryer is beneath truck, driver side, bolted to chassis. Have considered relocating it. Quote Link to comment Share on other sites More sharing options...
NoDirectionHome Posted April 26, 2018 Report Share Posted April 26, 2018 Some people don't know the difference between a purge valve and a governor. Quote Link to comment Share on other sites More sharing options...
DesertMiner Posted April 26, 2018 Report Share Posted April 26, 2018 👍 Quote Link to comment Share on other sites More sharing options...
GlennWest Posted April 26, 2018 Report Share Posted April 26, 2018 (edited) Yes, but with the former Freightliner Access site I can look up everything on my truck. It is on the dryer assembly. Purge valve is in bottom of it. Edited April 26, 2018 by GlennWest Quote Link to comment Share on other sites More sharing options...
Av8r3400 Posted April 26, 2018 Author Report Share Posted April 26, 2018 Thanks. Quote Link to comment Share on other sites More sharing options...
Scrap Posted April 26, 2018 Report Share Posted April 26, 2018 It is an AD-IS dryer. When mounted and o-ring'd to an air tank with mini purge tank welded on the end it is called a Dryer Reservoir Module or DRM. Must be 135 psi governor and must have a special check valve assembly installed when governor replaced. Must also use its own governor gasket and not the felt one used on a compressor head. In other words, get an AD-IS governor if replacing, not a generic for all the others. Yes it is way more expensive than the others. Such is life. Quote Link to comment Share on other sites More sharing options...
Hewhoknowslittle Posted April 26, 2018 Report Share Posted April 26, 2018 5 hours ago, Scrap said: It is an AD-IS dryer. When mounted and o-ring'd to an air tank with mini purge tank welded on the end it is called a Dryer Reservoir Module or DRM. Must be 135 psi governor and must have a special check valve assembly installed when governor replaced. Must also use its own governor gasket and not the felt one used on a compressor head. In other words, get an AD-IS governor if replacing, not a generic for all the others. Yes it is way more expensive than the others. Such is life. But this governor is still replaceable. Quote Link to comment Share on other sites More sharing options...
Darryl&Rita Posted April 26, 2018 Report Share Posted April 26, 2018 But it's still replaceable? Might not be common inventory, but it has a part number? Quote Link to comment Share on other sites More sharing options...
Scrap Posted April 26, 2018 Report Share Posted April 26, 2018 Yea, the pneumatic one has a replacement kit. The electronic governor versions for it so far don't. So how about the newer Volvos with the clutched compressor? Do they have a governor or just wires? Quote Link to comment Share on other sites More sharing options...
GlennWest Posted April 26, 2018 Report Share Posted April 26, 2018 Yeah, that's it. That govenor is next to chassis too. That is why when time to replace, relocate it. Quote Link to comment Share on other sites More sharing options...
Big5er Posted April 26, 2018 Report Share Posted April 26, 2018 I was going to post the picture of mine that I posted the last time this came up....but DesertMiner beat me to it. I imagine that they are vehicle AND engine specific. Quote Link to comment Share on other sites More sharing options...
Scrap Posted April 27, 2018 Report Share Posted April 27, 2018 You can't relocate the governor because it is o-ring'd to the dryer. There are no threads to put fittings to and there is no way to hold the delivery check valve in place. You can't relocate the dryer because it is o-ringed to the purge tank, and the purge tank is welded to the DRM with a bung going through it to your secondary reservoir. The whole thing is integral and can't be separated. It is the best dryer system out there and is probably best not to change it. Quote Link to comment Share on other sites More sharing options...
Big5er Posted April 27, 2018 Report Share Posted April 27, 2018 Scrap, can you move the whole thing? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.