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Topic: 1999 U320 w/ Cummins-Air Brake Compressor cut-in and cut-out settings (Read 482 times) previous topic - next topic

1999 U320 w/ Cummins-Air Brake Compressor cut-in and cut-out settings

Hi,
  Does anyone know the correct cut-in and cut-out settings for the compressor governor for the Cummins M11?
Thank you,
John
1999 U320 Coach 42' DGFE Build Number 5540

Re: 1999 U320 w/ Cummins-Air Brake Compressor cut-in and cut-out settings

Reply #1 –
Last Bendix school I went to between 125 to 135 was normal cut out pressure. Cut in pressure should be 20 to 25 PSI below cut out pressure. If there is more than 30 psi difference governor needs replacement.

Mike
Pamela & Mike 97 U 320

"It's not what happens to you, but how you react to it that matters."

Re: 1999 U320 w/ Cummins-Air Brake Compressor cut-in and cut-out settings

Reply #2 –
Adjusting instructions for the D-2:

https://n0c357rmy1njbuit2friqwu.blob.core.windows.net/documents/BrddZ4M0I0EBhB_SD-01-503_US_005.pdf

1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: 1999 U320 w/ Cummins-Air Brake Compressor cut-in and cut-out settings

Reply #3 –
Adjusting to the upper end will improve brake operation. Probably reduces compressor life due to higher operating loads, it is worth it IMO. Not saying above 135.

Re: 1999 U320 w/ Cummins-Air Brake Compressor cut-in and cut-out settings

Reply #4 –
My memory is DOT reccomends 130 cut off for school buses.  More brakes
"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: 1999 U320 w/ Cummins-Air Brake Compressor cut-in and cut-out settings

Reply #5 –
Thanks folks, I really appreciate the advice, mine is running at 110 so I think some adjustments are needed. Safe travels,stay well. John
1999 U320 Coach 42' DGFE Build Number 5540

Re: 1999 U320 w/ Cummins-Air Brake Compressor cut-in and cut-out settings

Reply #6 –
I set mine at 130 psi. to make filling tires easier. Less brake pedal pressure for stopping is a side benefit.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: 1999 U320 w/ Cummins-Air Brake Compressor cut-in and cut-out settings

Reply #7 –
Mine is at 130 also.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: 1999 U320 w/ Cummins-Air Brake Compressor cut-in and cut-out settings

Reply #8 –
Quote from: craneman –
Less brake pedal pressure for stopping is a side benefit.

Cman said it best. 
10 psi more will not give you more braking ability if so you have a major problem. Application air pressure is pretty low with normal stops,  10 psi more will not help with an emergency stop.  Possibly more susceptible to leaks also on a old system designed for 120 max,  plus the added compressor run time.
Doug W.
96 36' U270 CSGI #4946
04 Toyota Tacoma 4x4
PNW

Re: 1999 U320 w/ Cummins-Air Brake Compressor cut-in and cut-out settings

Reply #9 –
I set mine to 130 for a better brake feel and more air for tire inflation.
1995 U320C SE 40'
Jeep 4x4 Commander - Limited - Hemi
"The Pack"  Yogi and Diesel our Airedales -  Charlie our Boxer/Akita mix. Gone but NEVER forgotten Jake our yellow Lab.
NRA Law Enforcement Firearms instructor - Handgun/shotgun
Regional Firearms instructor for national Armored Transp. Co.

Re: 1999 U320 w/ Cummins-Air Brake Compressor cut-in and cut-out settings

Reply #10 –
Have been running ours at 130 for 10+ years - nothing has blown up....  8)
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: 1999 U320 w/ Cummins-Air Brake Compressor cut-in and cut-out settings

Reply #11 –
Quote from: Chuck & Jeannie –
Have been running ours at 130 for 10+ years - nothing has blown up....  8)
Glade you said it instead of me. Let us know if it bursts into flames now.