Now tag axle pressure

[Pete Masterson]

My tag gauge normally reads about 65# (as is specified in my blue
box). Dumping the tag axle causes the gauge to drop down to near zero
(after a few minutes). I always dump tag first, then main suspension
-- although sometimes in close succession, as when preparing to drop
the jacks in an RV park. I've never seen the tag pressure go up above
70 (sometimes, while underway, the gauge 'jiggles' between 60 and 70
-- from suspension movement, I presume).

I don't generally pay much attention to the tag pressure, except to
verify that it's come up during start up phase before a departure --
and occasionally, while on the road, I'll scan all the "minor"
instruments to see that they're in normal range. For example, exhaust
gas temperature is not much of an issue, except when climbing a long
grade. Pressure boost also is rarely of interest except climbing at
higher altitudes, etc. The top row of gauges get more regular
attention while on the road -- and I suppose they're positioned as
they are due to their relative importance. Since the tag pressure
gauge is in a hard to view spot at the bottom edge of the panel next
to the steering wheel post, it's position suggests relatively low
importance.

Pete Masterson
'95 Blue Bird Wanderlodge WBDA 42
El Sobrante CA
aeonix1@...



On Jan 4, 2008, at 9:27 PM, Curt Sprenger wrote:

> Inflate suspension first, tag second. Dump tag first, suspension
> second.
>
> If suspension pressure is low and dumping tag, the tag pressure
> will read
> beyond normal.
>
> Our tag reads 55 on the gauge, same as the blue book specifies.
>
> n Jan 4, 2008 9:01 PM, Gregory OConnor wrote:
>
>> Tag axle pressure is a factor to weight on the tag relative to the
>> pressure on the drive. Since the drive axle pressure is fixed and
>> not monitored via the dash, the tag pressure that proves even heat
>> across the six tires after a run is a safe bet.
>>
>> When backing in a site or driving on uneven surfaces tag pressure
>> sudden increase may reveal that the drive axle has lost traction.
>> If rpm of the detroit is not responding with movement, rpm should be
>> kept down to minimize the sudden torque stress once the drive makes
>> traction once again.
>>
>> Since dropping the air on the tag helps make tighter turns and gives
>> the bus safer traction in low speed areas, I think The gauge is more
>> or less an indicator that the tag bags are full or not.
>>
>> the tag axle Wanderlodge is called "three axle tag". A three axle
>> truck or bus that has two drive axles connected by a driveshaft
>> between them is called "TwinScrew".
>>
>> My tag reads 60 when full. when I dump it via the TAG dash
>> electric/air switch, tag gauge goes up to over 100. my thinking is
>> that the drive and tag valve are cross wired, and I am dumping the
>> drive.
>>
>> What is the engineered reaction to dumping the suspension switch
>> ONLY ??? will that also dump the tag?
>>
>> GregoryO'Connor
>> 94ptRomolandCa
>>
>> --- In WanderlodgeForum@yahoogroups.com >> 40yahoogroups.com>,
>> "Scott Forman"
>> <sforman@...> wrote:
>>>
>>> I have not weighed.
>>>
>>> --- In WanderlodgeForum@yahoogroups.com >>> 40yahoogroups.com>,
>> "Jay Darst"
>>> wrote:
>>>>
>>>> Scott,
>>>>
>>>> my tag pressure agage reads 50psi. Seems to drive fine.
>>>>
>>>> Axle weights are approx:
>>>> stear = 13,400 lbs
>>>> drive = 20,000 lbs
>>>> tag = 8,000 lbs
>>>>
>>>> Thats full of fuel and water.
>>>> Gray and black empty.
>>>>
>>>> Have you weighed each axle?
>>>>
>>>> Jay Darst
>>>> 85PT40
>>>>
>>>>
>>>> --- In WanderlodgeForum@yahoogroups.com >>>> 40yahoogroups.com>,
>> "Scott Forman"
>> <sforman@>
>>>> wrote:
>>>>>
>>>>> Half way between the 50 and 75 lines. I thought about it
>> after I
>>>>> typed the post, and the only basis I really have for that
>>>>> being "normal" is the fact that it is what mine has always
>> read.
>>> I
>>>>> can't say I recall reading or hearing what it is supposed to
>> be.
>>>>> What is yours?
>>>>>
>>>>> Scott
>>>>>
>>>>> --- In WanderlodgeForum@yahoogroups.com >>>>> 40yahoogroups.com>,
>> "Jay Darst"
>>>
>>>>> wrote:
>>>>>>
>>>>>> Scott,
>>>>>>
>>>>>> What does your tag pressure gage read?
>>>>>>
>>>>>> Jay Darst
>>>>>> 85PT40
>>>>>>
>>>>>>
>>>>>>
>>>>>> --- In WanderlodgeForum@yahoogroups.com >>>>>> 40yahoogroups.com>,
>> "Scott Forman"
>>>> <sforman@>
>>>>>> wrote:
>>>>>>>
>>>>>>> "tag axle pressure reducing valve"
>>>>>>>
>>>>>>> Does this control tag ride height? Where is it? I think
>> my
>>>> tag
>>>>> is
>>>>>>> riding high despite the pressure gauge reading ok
>>>>>>>
>>>>>>> Scott Forman
>>>>>>> 86 PT38
>>>>>>> Memphis
>>>>>>>
>>>>>>> --- In WanderlodgeForum@yahoogroups.com >>>>>>> 40yahoogroups.com>,
>> "mbulriss"
>>> <mbulriss@>
>>>>>>> wrote:
>>>>>>>>
>>>>>>>> Bird of the Week has been updated.
>>>>>>>>
>>>>>>>> Today's example is what a dedicated owner can do. I
>>> normally
>>>>> do
>>>>>> not
>>>>>>>> post extra information on the Bird of the Week pictures,
>>> but
>>>>> this
>>>>>>> one
>>>>>>>> so impressed me with all the new owner's upgrading in
>> such
>>> a
>>>>> short
>>>>>>>> time period, that I felt compelled to pass along some of
>> the
>>>>>>>> information they sent in with the pictures.
>>>>>>>>
>>>>>>>> From Glenn's picture submission: "We've had the bird
>> about
>>> 6
>>>>>> months
>>>>>>>> and are the 3rd owners. I purchased it from an owner in
>>>> Texas
>>>>> and
>>>>>>>> drove it home to Georgia. I'm in the process of getting
>>> the
>>>> bus
>>>>>>>> reconditioned. I have replaced the hot water heater,
>>>>>> refrigerator,
>>>>>>>> front window, holding tank dump valves, battery cables,
>> tag
>>>> axle
>>>>>>>> pressure reducing valve, and air dryer. I have replaced
>>> the
>>>>>> seals
>>>>>>> in
>>>>>>>> the drive axle and the steer axle. On the steer axle, I
>>> have
>>>>>>> replaced
>>>>>>>> the wheel bearings, shoes, and drums. I have purchased
>> 3
>>> new
>>>>>>> Dometic
>>>>>>>> Penguin low profile A/Cs and a Magnum MS2812 inverter
>> for
>>> my
>>>>> next
>>>>>>>> projects. Hopefully I will have them installed in a few
>>>>> months.
>>>>>> We
>>>>>>>> love to camp a lot and so I try to schedule my upgrades
>> and
>>>>>>>> maintenance around our camping schedule."
>>>>>>>>
>>>>>>>> Wow, what an impressive to-do list in such a short
>> period.
>>>>>> Glenn,
>>>>>>> are
>>>>>>>> you retired, or when did you have time to camp?
>> Hopefully
>>>> you
>>>>>> will
>>>>>>>> document some of the upcoming projects and post step-by-
>>> step
>>>>>>> pictures
>>>>>>>> in the Photos section of the forum. I am personally
>>>> interested
>>>>> in
>>>>>>>> knowing more about the A/C project; part numbers,
>>> thermostat
>>>>>>> changes,
>>>>>>>> wiring changes. Please keep us up-to-date on your
>> projects.
>>>>>>>>
>>>>>>>> Thanks to Glenn for his Bird of the Week submission!
>>>>>>>>
>>>>>>>> Mike Bulriss
>>>>>>>> 1991 WB40 "Texas Minivan"
>>>>>>>> San Antonio, TX - back from South Padre, darn it!!
>>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>>
>>
>
>
>
> --
> Curt Sprenger
> 1987 PT38 8V92 "MacAttack Racing"
> Anaheim Hills, CA
>
>
> [Non-text portions of this message have been removed]
>
>
>
>
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>
>
>



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