Dana air compressor

W

william & allene white

New member
Apr 30, 1998
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I installed a rebuild kit for the Dana air compressor and I had the electric
motor checked out at an electrical motor shop. They said it was ok. I also
made sure the rotation of the motor was in the right direction (clockwise).
However, after I installed the Dana unit into the Motorhome, the 20 Amp fuse
blew within ten seconds. I then installed a 25 amp fuse and it blew within
20 seconds. Then I stalled a 30 amp fuse (that's the highest amp fuse I can
put in because of the 30 amp breaker) and it blew within 2 minutes. Also
the connections to the air compressor pressure switch start smoking along
with the fuse box for the air compressor.

I can run the electric motor alone with a 20 amp fuse. The fuse gets hot
but does not blow.

I followed the instructions to the rebuild kit and it says not to use any
lubricant on the compressor cylinders.

What am I doing wrong??? I welcome any and all suggestions. HELP!

Our Motorhome is a 1973, 23' Glacier.

William & Allene White
White's Computer
 
Did you time the cylinders correctly? make sure you can turn the compressor
by hand before hooking it up.
NEVER, NEVER, NEVER PUT AN OVERSIZE FUSE IN ANY ELECTRICAL CIRCUIT!!! You
will be lucky if you only destroyed the motor and switch. Many have burned
upo their wiring harnesses like this.

I would suggest if you do not have the factory manual for the coach you get
one before gong any further.

Good luck

>I installed a rebuild kit for the Dana air compressor and I had the electric
>motor checked out at an electrical motor shop. They said it was ok. I also
>made sure the rotation of the motor was in the right direction (clockwise).
>However, after I installed the Dana unit into the Motorhome, the 20 Amp fuse
>blew within ten seconds. I then installed a 25 amp fuse and it blew within
>20 seconds. Then I stalled a 30 amp fuse (that's the highest amp fuse I can
>put in because of the 30 amp breaker) and it blew within 2 minutes. Also
>the connections to the air compressor pressure switch start smoking along
>with the fuse box for the air compressor.
>
>I can run the electric motor alone with a 20 amp fuse. The fuse gets hot
>but does not blow.
>
>I followed the instructions to the rebuild kit and it says not to use any
>lubricant on the compressor cylinders.
>
>What am I doing wrong??? I welcome any and all suggestions. HELP!
>
>Our Motorhome is a 1973, 23' Glacier.
>
>
>William & Allene White
>White's Computer
>
>
>
>
 
yes I timed the cylinders and I have the manuals. thanks for reply.

Bill
- -----Original Message-----
From: Thomas G. Warner
To: gmcmotorhome
Date: Saturday, September 19, 1998 5:05 PM
Subject: Re: GMC: Dana air compressor

>Did you time the cylinders correctly? make sure you can turn the compressor
>by hand before hooking it up.
>NEVER, NEVER, NEVER PUT AN OVERSIZE FUSE IN ANY ELECTRICAL CIRCUIT!!! You
>will be lucky if you only destroyed the motor and switch. Many have burned
>upo their wiring harnesses like this.
>
>I would suggest if you do not have the factory manual for the coach you get
>one before gong any further.
>
>Good luck

>>I installed a rebuild kit for the Dana air compressor and I had the
electric
>>motor checked out at an electrical motor shop. They said it was ok. I
also
>>made sure the rotation of the motor was in the right direction
(clockwise).
>>However, after I installed the Dana unit into the Motorhome, the 20 Amp
fuse
>>blew within ten seconds. I then installed a 25 amp fuse and it blew
within
>>20 seconds. Then I stalled a 30 amp fuse (that's the highest amp fuse I
can
>>put in because of the 30 amp breaker) and it blew within 2 minutes. Also
>>the connections to the air compressor pressure switch start smoking along
>>with the fuse box for the air compressor.
>>
>>I can run the electric motor alone with a 20 amp fuse. The fuse gets hot
>>but does not blow.
>>
>>I followed the instructions to the rebuild kit and it says not to use any
>>lubricant on the compressor cylinders.
>>
>>What am I doing wrong??? I welcome any and all suggestions. HELP!
>>
>>Our Motorhome is a 1973, 23' Glacier.
>>
>>
>>William & Allene White
>>White's Computer
>>
>>
>>
>>
>
 
I second the never put a larger sized fuse in place of what is supposed to be there. I recently purchased a '74 Sequoia that the previous owner had done just that. He then removed the fuse from the Dana compressor altogether. It took me better than 2 weeks and countless trips to the junk yard to fix the wiring harness and all the vacume lines going to the air control in the dash board.
Have you tried connecting the compressor to 12 volts while it is sitting on your work bench. It can be easier to trouble shot it there than in the coach.

Don
'74 Sequoia, '77 Palm Beach
- --

>Did you time the cylinders correctly? make sure you can turn the compressor
>by hand before hooking it up.
>NEVER, NEVER, NEVER PUT AN OVERSIZE FUSE IN ANY ELECTRICAL CIRCUIT!!! You
>will be lucky if you only destroyed the motor and switch. Many have burned
>upo their wiring harnesses like this.
>
>I would suggest if you do not have the factory manual for the coach you get
>one before gong any further.
>
>Good luck

>>I installed a rebuild kit for the Dana air compressor and I had the electric
>>motor checked out at an electrical motor shop. They said it was ok. I also
>>made sure the rotation of the motor was in the right direction (clockwise).
>>However, after I installed the Dana unit into the Motorhome, the 20 Amp fuse
>>blew within ten seconds. I then installed a 25 amp fuse and it blew within
>>20 seconds. Then I stalled a 30 amp fuse (that's the highest amp fuse I can
>>put in because of the 30 amp breaker) and it blew within 2 minutes. Also
>>the connections to the air compressor pressure switch start smoking along
>>with the fuse box for the air compressor.
>>
>>I can run the electric motor alone with a 20 amp fuse. The fuse gets hot
>>but does not blow.
>>
>>I followed the instructions to the rebuild kit and it says not to use any
>>lubricant on the compressor cylinders.
>>
>>What am I doing wrong??? I welcome any and all suggestions. HELP!
>>
>>Our Motorhome is a 1973, 23' Glacier.
>>
>>
>>William & Allene White
>>White's Computer
>>
>>
>>
>>
>
>

Free web-based email, Forever, From anywhere!
http://www.mailexcite.com
 
I second the never put a larger sized fuse in place of what is supposed to be there. I recently purchased a '74 Sequoia that the previous owner had done just that. He then removed the fuse from the Dana compressor altogether. It took me better than 2 weeks and countless trips to the junk yard to fix the wiring harness and all the vacume lines going to the air control in the dash board.
Have you tried connecting the compressor to 12 volts while it is sitting on your work bench. It can be easier to trouble shot it there than in the coach.

Don
'74 Sequoia, '77 Palm Beach
- --

>Did you time the cylinders correctly? make sure you can turn the compressor
>by hand before hooking it up.
>NEVER, NEVER, NEVER PUT AN OVERSIZE FUSE IN ANY ELECTRICAL CIRCUIT!!! You
>will be lucky if you only destroyed the motor and switch. Many have burned
>upo their wiring harnesses like this.
>
>I would suggest if you do not have the factory manual for the coach you get
>one before gong any further.
>
>Good luck

>>I installed a rebuild kit for the Dana air compressor and I had the electric
>>motor checked out at an electrical motor shop. They said it was ok. I also
>>made sure the rotation of the motor was in the right direction (clockwise).
>>However, after I installed the Dana unit into the Motorhome, the 20 Amp fuse
>>blew within ten seconds. I then installed a 25 amp fuse and it blew within
>>20 seconds. Then I stalled a 30 amp fuse (that's the highest amp fuse I can
>>put in because of the 30 amp breaker) and it blew within 2 minutes. Also
>>the connections to the air compressor pressure switch start smoking along
>>with the fuse box for the air compressor.
>>
>>I can run the electric motor alone with a 20 amp fuse. The fuse gets hot
>>but does not blow.
>>
>>I followed the instructions to the rebuild kit and it says not to use any
>>lubricant on the compressor cylinders.
>>
>>What am I doing wrong??? I welcome any and all suggestions. HELP!
>>
>>Our Motorhome is a 1973, 23' Glacier.
>>
>>
>>William & Allene White
>>White's Computer
>>
>>
>>
>>
>
>

Free web-based email, Forever, From anywhere!
http://www.mailexcite.com
 
I am having the same trouble with the Dan compressor. Runs great o one
compressor but
as soon as both kick in the 30AMP fuse blows..Any thought would be appreciated.
Phil 78 Royale

> I installed a rebuild kit for the Dana air compressor and I had the electric
> motor checked out at an electrical motor shop. They said it was ok. I also
> made sure the rotation of the motor was in the right direction (clockwise).
> However, after I installed the Dana unit into the Motorhome, the 20 Amp fuse
> blew within ten seconds. I then installed a 25 amp fuse and it blew within
> 20 seconds. Then I stalled a 30 amp fuse (that's the highest amp fuse I can
> put in because of the 30 amp breaker) and it blew within 2 minutes. Also
> the connections to the air compressor pressure switch start smoking along
> with the fuse box for the air compressor.
>
> I can run the electric motor alone with a 20 amp fuse. The fuse gets hot
> but does not blow.
>
> I followed the instructions to the rebuild kit and it says not to use any
> lubricant on the compressor cylinders.
>
> What am I doing wrong??? I welcome any and all suggestions. HELP!
>
> Our Motorhome is a 1973, 23' Glacier.
>
> William & Allene White
> White's Computer
 
You need to furnish more information. The coach does not have 2 compressors.

>I am having the same trouble with the Dan compressor. Runs great o one
>compressor but
>as soon as both kick in the 30AMP fuse blows..Any thought would be appreciated.
>Phil 78 Royale
>

>
>> I installed a rebuild kit for the Dana air compressor and I had the electric
>> motor checked out at an electrical motor shop. They said it was ok. I also
>> made sure the rotation of the motor was in the right direction (clockwise).
>> However, after I installed the Dana unit into the Motorhome, the 20 Amp fuse
>> blew within ten seconds. I then installed a 25 amp fuse and it blew within
>> 20 seconds. Then I stalled a 30 amp fuse (that's the highest amp fuse I can
>> put in because of the 30 amp breaker) and it blew within 2 minutes. Also
>> the connections to the air compressor pressure switch start smoking along
>> with the fuse box for the air compressor.
>>
>> I can run the electric motor alone with a 20 amp fuse. The fuse gets hot
>> but does not blow.
>>
>> I followed the instructions to the rebuild kit and it says not to use any
>> lubricant on the compressor cylinders.
>>
>> What am I doing wrong??? I welcome any and all suggestions. HELP!
>>
>> Our Motorhome is a 1973, 23' Glacier.
>>
>> William & Allene White
>> White's Computer
>
>
>
>
>
 
Thom:

Not true. Coaches with Electro Level II have twin compressors, as my 78
Royal does.

Paul Bartz

- -----Original Message-----
From: Thomas G. Warner [mailto:warner]
Sent: Monday, September 21, 1998 8:44 AM
To: gmcmotorhome
Subject: Re: GMC: Dana air compressor

You need to furnish more information. The coach does not have 2
compressors.

I am having the same trouble with the Dan compressor. Runs great o one
compressor but as soon as both kick in the 30AMP fuse blows..Any thought
would be appreciated.
Phil 78 Royale

I installed a rebuild kit for the Dana air compressor and I had the
electric motor checked out at an electrical motor shop. They said it
was ok. I also made sure the rotation of the motor was in the right
direction (clockwise). However, after I installed the Dana unit into
the Motorhome, the 20 Amp fuse blew within ten seconds. I then
installed a 25 amp fuse and it blew within 20 seconds. Then I stalled a
30 amp fuse (that's the highest amp fuse I can put in because of the 30
amp breaker) and it blew within 2 minutes. Also the connections to the
air compressor pressure switch start smoking along with the fuse box for
the air compressor.
I can run the electric motor alone with a 20 amp fuse. The fuse gets
hot but does not blow.
I followed the instructions to the rebuild kit and it says not to use
any lubricant on the compressor cylinders.
What am I doing wrong??? I welcome any and all suggestions. HELP!
Our Motorhome is a 1973, 23' Glacier.
William & Allene White
White's Computer
 
Stew:

I have the rear twin bed Royale floor plan and the compressors (two
separate single cylinder ones) are located under the bed board on the
drivers side in the space that is just ahead of the generator enclosure
and just aft of the bathroom wall.

Paul

From: STEWBC [mailto:STEWBC]
Sent: Monday, September 21, 1998 1:59 PM
Subject: Re: GMC: Dana air compressor

Paul, where are the 2 compressors located? Are you referring to the
twin cylinder Dana?

My 78 Royale manuf in early 1978 only had one with the Electro level II.
I have replace the Dana unit with a large 2 cyl. Gast 12 Volt compressor
with great success.

Stew, 78 Royale
 
Stew
Do you have a source & price for the Gast?

Eric Tipton

-----Original Message-----
From: STEWBC [SMTP:STEWBC]
Sent: Monday, September 21, 1998 10:59 AM
To: gmcmotorhome
Subject: Re: GMC: Dana air compressor

Paul, where are the 2 compressors located? Are you referring to
the twin
cylinder Dana?
My 78 Royale manuf in early 1978 only had one with the Electro
level II. I
have replace the Dana unit with a large 2 cyl. Gast 12 Volt
compressor with
great success.
Stew, 78 Royale
 
The 78 Royale I have has the two small cylinder air compressors. I
believe that the previous owner had it installed. The system worked
fine tonight after I started to
the engine. Must have a low battery that is causing the problem.
Thanks Phil
 
Lest anyone still have doubts that twin compressors for the rear
suspension were indeed installed in the coach by GMC, look at Figure 2,
page 4B-3 of the '1977 and 1978 Maintenance Manual Supplement' (X-7725),
which shows the Type II rear suspension - Electro Level II.

Paul Bartz
- ----------
From: Philip T. Dickinson
To: gmcmotorhome
Sent: 9/21/98 7:57:04 PM
Subject: GMC: Dana air compressor

The 78 Royale I have has the two small cylinder air compressors. I
believe that the previous owner had it installed. The system worked
fine tonight after I started to
the engine. Must have a low battery that is causing the problem.
Thanks Phil
 
It sounds like you may have a poor ground (-) terminal. Try attaching the wire to the negative side of the battery. If this works run a jumper to a known good ground.

Don
- --

>Thom:
>
>Not true. Coaches with Electro Level II have twin compressors, as my 78
>Royal does.
>
> Paul Bartz
>
>-----Original Message-----
>From: Thomas G. Warner [mailto:warner]
>Sent: Monday, September 21, 1998 8:44 AM
>To: gmcmotorhome
>Subject: Re: GMC: Dana air compressor
>
>You need to furnish more information. The coach does not have 2
>compressors.

>I am having the same trouble with the Dan compressor. Runs great o one
>compressor but as soon as both kick in the 30AMP fuse blows..Any thought
>would be appreciated.
>Phil 78 Royale

>I installed a rebuild kit for the Dana air compressor and I had the
>electric motor checked out at an electrical motor shop. They said it
>was ok. I also made sure the rotation of the motor was in the right
>direction (clockwise). However, after I installed the Dana unit into
>the Motorhome, the 20 Amp fuse blew within ten seconds. I then
>installed a 25 amp fuse and it blew within 20 seconds. Then I stalled a
>30 amp fuse (that's the highest amp fuse I can put in because of the 30
>amp breaker) and it blew within 2 minutes. Also the connections to the
>air compressor pressure switch start smoking along with the fuse box for
>the air compressor.
>I can run the electric motor alone with a 20 amp fuse. The fuse gets
>hot but does not blow.
>I followed the instructions to the rebuild kit and it says not to use
>any lubricant on the compressor cylinders.
>What am I doing wrong??? I welcome any and all suggestions. HELP!
>Our Motorhome is a 1973, 23' Glacier.
>William & Allene White
>White's Computer
>

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