BNO BBS - BNO's Bulletin Board System

TOPICS => THE BOARD => Topic started by: travelingchuck on July 08, 2014, 04:51:10 PM

Title: Allison B500 Code 45-23, 24-23 | Retarder stuck on, off?
Post by: travelingchuck on July 08, 2014, 04:51:10 PM: Hello Bus Nuts,

I have a '95 D3 with a retarded Allison B500 and Series 60 engine.

I'm getting allison codes:

45-23 Open circuit, H solenoid circuit
24-23 Sump oil temperature, hot

These also came with a hot engine code / check engine, which makes sense since they share coolant.

Looks like the H solenoid is the accumulator, which is related to the retarder.

Does anyone have any experience with this?
What exactly is happening when that solenoid is stuck open?
I have the retarder turned off at the dash, but is it stuck on?
Is there a quick fix / limp home option for this? Cutting a wire, shorting a wire, crimping the retarder air line?

Any help is appreciated.

Many thanks,
Charles
Title: Re: Allison B500 Code 45-23, 24-23 | Retarder stuck on, off?
Post by: digesterman on July 08, 2014, 10:44:08 PM: Is there a breaker in the rear junction box you can pull?

Sent from my iPad using Tapatalk
Title: Re: Allison B500 Code 45-23, 24-23 | Retarder stuck on, off?
Post by: luvrbus on July 08, 2014, 11:26:01 PM: Most all the 45 codes 12 thru 26 are ground or connection problems ,24-23 should clear when the temps are normal, bad connections or grounds throwing the 45 codes will cause the other codes also 61 is the code for over temp on the retarder clean the connections and grounds you should be good to go

good luck
Title: Re: Allison B500 Code 45-23, 24-23 | Retarder stuck on, off?
Post by: TomC on July 21, 2014, 10:42:22 AM: I just love my mechanical engine and transmission.