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Topic: New D2 governor (Read 799 times) previous topic - next topic

New D2 governor

Recently installed a new Bendix D2 governor, question is, should it be adjusted to the cut in and out pressures of the old one? Considering that I'm not the original owner, I'm not sure what it was set at when it left the FT factory. The old D2 cut in at 95psi and cut out was 115psi. the new one now cuts out at 120-130 and cut in is around 110-115psi. Maybe I should lower it 10psi?

I have read on the forum that some members raise there D2 pressures to enable faster airing up of the tires, this isn't a big concern to me and I don't want to over pressure the 26 year old components of the old gal. Everything worked fine at the lower pressures.

I'm sure I'll get different opinions but I would like to hear them anyway....... :))

 
Justin & Cathy Byrd
1995 U280 "Old Faithful"
36' Build #4673
C8.3 Cummins
Allison MD3060R 6 speed - retarder
Powertech 10KW  4cyl Kubota

Re: New D2 governor

Reply #1 –
You old one was set too low. The new one is correct.
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: New D2 governor

Reply #3 –
Quote from: FourTravelers –

 I don't want to over pressure the 26 year old components of the old gal. Everything worked fine at the lower pressures.
 

These are your brakes that we're talking about here.  Everything should work without fail at full system pressure.
1992 Foretravel Grand Villa
U225 SBID Build No. 4134
1986 Rockwood Driftwood
1968 S.I.A.T.A. Spring
1962 Studebaker Lark
1986 Honda VF700C
1983 Honda VF750C
Charlie, the Dog was broken out of jail 24 Oct 2023
N1RPN
AA1OH (H)e who must be obeyed.

Re: New D2 governor

Reply #5 –
It is a personal choice legally but here is a recommendation.

ata tmc governor pressure - Google Search
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: New D2 governor

Reply #6 –
I would think the brake cans would like the higher pressure. Also, more of a margin before the low pressure light comes on. Easier to fill tires if you don't have a compressor on board.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: New D2 governor

Reply #7 –
Mine is a 130 psi governor, on around 100 off at 130. Just my personal preference.
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country

Re: New D2 governor

Reply #8 –
Quote from: Twig –
Why? Mine has been 95/115 for 26 years. Curious.
Hey Twig, you might need to change that 26 year old governor 😎🍺
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country

Re: New D2 governor

Reply #11 –
And ...  if you add more pressure to a system that's accustomed to 115.  Aren't you asking for leaks ?
Robert and Susan
 1995 36' 280 WTBI 8.3 3060r
 1200 watts on the roof, 720 Ah of lithium's
 Build # 4637. Motorcade # 17599
        FMCA  # 451505
        18  Wrangler JLUR

Re: New D2 governor

Reply #12 –
If a 10 psi. increase causes a leak in the brake system the component was failing anyway. The air bags have their own regulator. My '81 Foretravel and '81 crane both are set for 130. The hoses are rated much higher.
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: New D2 governor

Reply #13 –
Quote from: Twig –
Is it broke?
I didn't say it was broke, if it's actually the 26 year old OEM part, I might would carry a spare one, might save you an issue.
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country

Re: New D2 governor

Reply #14 –
When I changed my D-2 I set it at 130#.
I much prefer the extra pressure.
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: New D2 governor

Reply #15 –
The high pressure safety relief valve on the wet tank is supposed to be set to open at 150 psi.  This might be considered the maximum working pressure of the air brake system?  I am confident the DOT components (air lines, valves, etc.) have a generous safety margin above this pressure.

I have our D2 set to unload at 130 psi.  I see no problem with running the air system at this pressure.  As always DWMYH.

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"