Whoops.... No SPEEDO and my bus goes faster

[Zephod]

Oops... Driving to Lowes today to get some lumber to build my motorhome insides, I had to brake sharply. I think I locked the wheels. Anyway, the speedo stopped working.

I reckon the speedo cable has popped out but I have no idea where it is or what it looks like. I have no idea how to reattach it either.

Has anybody any suggestions? Also, since the governor seems not to be bothering me now, what does a governor look like and how can I plumb it out of the system?

[luvrbus]

The governor is inside the injection pump on a non electronic DT466 there is no " governor plumbing " on the Bosch pump

[Tony LEE]

D we know what sort of vehicle you have?

I'd assume the speedo feed comes from the output shaft of the gearbox. Depending on your vehicle, it could be an electrical cable rather than a mechanical drive.

The governor is usually there as a safety device to limit the engine maximum speed and doesn't come into play under normal cruising conditions

[Zephod]

Its a 1995 international 3800 with alinson automatic gearbox and a dt466.

I am new to looking under hoods. 20 years ago, I changed the head gasket on my old Suzuki alto fx

[Jeremy]

I suspect the term 'governor' is confusing here; my bus has an electrical speed limiter, which I'm sure is what the OP is referring to and is nothing to do with the governor on the engine. Unfortunately mine is still operational and I'm not actually sure how it is connected yet - I might eventually find out if I decide to disconnect it, but I'm no no hurry () because it's set at the legal speed limit already so acts as a handy fuel-and-licence-saving device

Jeremy

[chessie4905]

   This is not a gas engine. Disable the governor and start carrying a couple of baskets to gather the engine parts when it destructs. Think $$$$$$ It is installed to protect the engine. Change the rear axle gearing to obtain more speed, although at the penalty of more sluggish/slower acceleration. You could actually have a malfunctioning governor, but you will need to get or install an engine tachometer to check/verify proper top rpm control. Some diesels can have the governed speed raised a couple of hundred rpm, but you will still need the tach to see where it's at now. Then you can check if it can be safely raised and by how much if any.

[bevans6]

No question in my mind that the "governor" has nothing to do with either the speedo not working or the electronic top speed limiting mechanism not working.  This is one situation where a tachometer and a GPS speedo would both be handy...

Brian

[belfert]

The OP may very well be talking about an electronic speed limiter instead of the engine governor.  Lots of newer buses with electronics have their speed limited electronically for safety and fuel economy reasons.  An International/Navistar dealer could probably disable an electronic speed limiter.  The governor that controls maximum engine speed you certainly should not disable.

My bus came with a speed limit set in the DDEC somewhere in the 70s.  The DDEC also had the cruise control disabled for some reason.  One of the first things I did was to have the speed limiter disabled and the cruise control enabled.  I usually only drive 65 MPH at most, but I didn't want my speed limited in any case.

[luvrbus]

I doubt he has a speed limiter on DT466 mechanical engine with a Bosch injection pump it is probably gearing as stated by Chessie all he has to do is look at the pedal a limiter will be a drive by wire pedal with wires going to a solenoid and a box   

[belfert]

Was International/Navistar still using mechanical engines in 1995?  I was assuming electronic by 1995 since Detroit was already on their third generation of electronic engines by 1995.

[luvrbus]

I think 1997 was the 1st DT466E

[TomC]

Mechanical DT466 is an excellent engine. Start upping the horsepower and/or the RPM and you'll have nothing but a bucket of bolts. Just drive the bus and enjoy the scenery. Good Luck, TomC

[Zephod]

I'd probably be able to check the speed with a GPS but sadly, the bus has no 12v power sockets. As it has two batteries, I suspect it might be a 24v system.

[belfert]

Buy a cheap handheld GPS and use that for speed.  I did that in my bus when the speedo didn't work.  Two AA batteries last a long time.  You can probably find a cheap one on Craigslist, or maybe a friend or relative has an old one they want rid of.  Even the most basic handheld GPS should show just speed.

[LuckyChow]

If you have an iphone or android phone, download one of the free GPS apps.  It's what I checked my speedo with.