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Bus Discussion => Bus Topics ( click here for quick start! ) => Topic started by: tyreman on January 11, 2022, 05:38:33 PM

Title: 8V92T HT 740
Post by: tyreman on January 11, 2022, 05:38:33 PM
Does anyone have pictures or a diagram of how the throttle and throttle position sensor cables are hooked up on a MC9 8V92T non DDEC HT740?
Title: Re: 8V92T HT 740
Post by: tr206 on January 18, 2022, 04:49:39 AM
Don't have a MCI if that mattered but on mine there is no cable from the engine to the transmission that I know of.
Title: Re: 8V92T HT 740
Post by: Bill Gerrie on January 18, 2022, 04:58:34 AM
A friend of mine had that set up and the modulator was controlled by a solenoid that allowed air to the modulator when a switch on the throttle pedal closed. The pedal had to be almost to the floor to close the switch.   
Title: Re: 8V92T HT 740
Post by: luvrbus on January 18, 2022, 07:15:00 AM
Quote from: Bill Gerrie on January 18, 2022, 04:58:34 AM
A friend of mine had that set up and the modulator was controlled by a solenoid that allowed air to the modulator when a switch on the throttle pedal closed. The pedal had to be almost to the floor to close the switch.

Using the air modulator with the MCI setup can be a real pain.I use the cable modulator from the transmission to the throttle it makes life a little less stressful,I have no idea what MCI thought that setup would accomplish 
Title: Re: 8V92T HT 740
Post by: tyreman on January 18, 2022, 07:50:11 AM
Thanks for everyone's reply but I don't know how it was originally connected and need a picture to reference to hook it back up.  :-\ 
Title: Re: 8V92T HT 740
Post by: luvrbus on January 18, 2022, 08:09:03 AM
Must be a transplant engine I cannot find that setup in my 1982 MCI 9 manuals with a 8v92 engine
Title: Re: 8V92T HT 740
Post by: tyreman on January 18, 2022, 08:13:28 AM
Not surprised, it was a Greyhound before a professional conversion in Florida (Sundance) back in the early 90's.
Title: Re: 8V92T HT 740
Post by: Bill Gerrie on January 18, 2022, 10:13:33 AM
luvrbus
I assumed he had an electronic engine when he said throttle position sensor etc. My friend had a DDECIV engine with a hydraulic trans. As there was no physical throttle on top of a governor the switch was the only way to modulate the trans.
Title: Re: 8V92T HT 740
Post by: luvrbus on January 18, 2022, 11:23:20 AM
Quote from: Bill Gerrie on January 18, 2022, 10:13:33 AM
luvrbus
I assumed he had an electronic engine when he said throttle position sensor etc. My friend had a DDECIV engine with a hydraulic trans. As there was no physical throttle on top of a governor the switch was the only way to modulate the trans.

MCI used those on non DDEC engines too,Van's Prevost with the DDEC engine has one with a 754 Allison non electronic transmission
Title: Re: 8V92T HT 740
Post by: Dave5Cs on January 18, 2022, 12:59:27 PM
With a leaky Pan..... :o
Title: Re: 8V92T HT 740
Post by: Van on January 18, 2022, 01:44:03 PM
Quote from: Dave5Cs on January 18, 2022, 12:59:27 PM
With a leaky Pan..... :o

Pan is repaired no leaks. Try and keep up Dave ;)