Where are air storage tanks?

[Chuck H]

I have been doing various maintenance items and one item needing attention would be draining the air storage tanks. The owners manual gives no clue as to where they are. I have a clue that are just behind the front axle but just wanted to make sure. Any ideas would be appreciated. 

Edited October 7, 2022 by Chuck H

[jacwjames]

I have one behind the front axle tucked up pretty high.  And I've got one in front of the rear axle tucked up high. 

[ncsteve]

Same hear as stated above. Pretty easy to see if looking under coach.

[Chuck H]

Yep both tanks right next to each other. One tank had 2 drain valves the other just 1. Why only 1 on the other?

[Ivan K]

The front tank is two in one, wet and dry sections, separated inside. Thinking about it, both beside each other, up front? Strange since they're supposed to be close to each axle to have short run to brakes.

Edited October 8, 2022 by Ivan K

[96 EVO]

59 minutes ago, Ivan K said:

The front tank is two in one, wet and dry sections, separated inside. Thinking about it, both beside each other, up front? Strange since they're supposed to be close to each axle to have short run to brakes.

Both of my tanks are within 3' of each other behind the front axle.

[Robert92867]

If you have 2002 Knight 34' PBD, you have hydraulic brakes, hence only 1 forward mounted air tank.  Right behind the generator.

[Chuck H]

Yep both tanks right next to each other. One tank had 2 drain valves the other just 1. Why only 1 on the other?

This coach has the optional Air over Hydraulic Brakes. Just was curious as to why one of the tanks only had 1 drain valve?

[96 EVO]

The tank with two drains is called a split tank. There is a wall welded down the middle of it. Half is the wet tank (supply tank), the other half is the front dry tank.

 both sides need a drain!

Edited October 8, 2022 by 96 EVO

[Robert92867]

Optional Air over Hydraulic... cool.  Does it have engine upgrade too? If so, that would make it much more valuable, and rare.

[Chuck H]

I'm not sure. Is having the 5.9 ISB 24 Valve 300 HP an upgrade?

[Robert92867]

Yes, according to the 2002 brochure, standard 275 hp with 2000 mh transmission, option is 300 hp with 3000 mh transmission.  The big difference is the 3000 mh transmission can handle more hp and torque.

[Chuck H]

That's what this coach is equipped with. One of the Po's(there were 5, I'm the 6th owner) installed a Banks system so it does have some power. I purchased this coach 2yrs.ago with 20k miles on it for $20k so it spent most of its life in RV Parks. The Genny only had 225hrs so not much dry camping either. It's had its issues but I'm slowly getting it in shape.