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Topic: New coach power train check out (Read 423 times) previous topic - next topic

New coach power train check out

Told by Foretravel that new coaches like ours (and maybe every other) was checked before leaving factory to see it correctly operates: 

With transmission in neutral, foot on brake or parking brake applied, press throttle to floor and RPM should almost reach 2700 RPM, which proves King Control, fuel filters, lift pump, injector pump, air filter and engine are working ok.

Re: New coach power train check out

Reply #1 –
I would use another way besides wot with no load on an engine but if it makes them feel good, it still belongs to them at that point.
Dub McBride 1996 270

Re: New coach power train check out

Reply #2 –
And if the King Control did'nt work the rpm's went higher and higher until the valve train cratered.
96 U270 BUILD 4810
85 380SL
Drummonds TN.

Re: New coach power train check out

Reply #3 –
Testing an engine like that makes no sense. First the King Control wouldn't need
to pull the cable to full travel to get the engine to govern RPM which should 2400
RPM on a 8'3 engine. Second with no load the fuel filters could be half plugged and get to
2400 RPM and not pull a load wereth a dam and the same with the other components.
Also King Control only lets the transmission know the throttle position and opens and
closes the throttle. The governor controls overspeed of the engine   
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: New coach power train check out

Reply #4 –
Quote from: Barry & Cindy –
With transmission in neutral, foot on brake or parking brake applied, press throttle to floor and RPM should almost reach 2700 RPM.
IF the factory does (or did) actually do that, what they are actually testing is the "High Idle" speed governor on the engine.

On my mechanical C8.3 "High Idle" is the max allowable full throttle engine RPM with no load.  This speed is controlled by a "centrifugal" type governor that is part of the P7100 fuel injection pump assembly.

"High Idle" speed on my C8.3 is supposedly factory set at 2760 RPM.  I have never tried to verify this particular number.


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"