| Author | Message | ||
| Dave (64.223.253.79)
Rating: |
I was ordering some parts today for my Eagle10 and was asked if Ihad A road speed governor on it to keep it down to around 60MPH?,my speed 62mph. My reply was I had no Idea ,I didn't know they came with such a thing. This is all the parts man could rember about them is some of the driver would pinch off air line goning to them to by pass them.. Is this guy pulling my leg or is this true,and where would this be located. Thanks Dave. | ||
| jim mci-9 (209.240.205.60) Rating: N/A |
.. it limits the rpm in the highest gear... normally about 200 rpm slower... i found the data in a old gm book... fo my 671... published in 1959...its actually called an "economy-range limiting speed governor"....according to da book, it is a limiting speed governor with 2 hi speed ranges..... so when the bus is operated in lower gears, you get full throttle... but in the highest gear, lack of air pressure to the governor limits you by 200 rpm.... | ||
| Nick Morris (Nick3751) (65.117.139.135)
Rating: N/A |
Would an older 671 have such a device? Mine was put in in '85 but I have no idea when it was built. | ||
| jim mci-9 (209.240.205.60) Rating: N/A |
the book i'm reading from is a 671 book... published march 1959....ive got a '54 671..... | ||
| Nick Morris (Nick3751) (65.117.139.135)
Rating: N/A |
good chance mine has one to then huh, that will be another thing I have to do. One disconnected govenor to come!!! | ||
| jim mci9 (209.240.205.60) Rating: N/A |
not necessarily.....there are several different types of governors....and according to da book, taking the air off, disconnecting, removing the air...etc, is what limits the speed... air pressure is necessary for the governor to go to full speed....identify your governor positively before you take anything loose!!!! yours' may not be 1 of the 1's that has the high gear de-rate... | ||
| Geoff (Geoff) (66.238.120.80)
Rating: N/A |
How about a "Variable Speed-Throttle Knockdown Type Governor" According to the book it is used on "certain" engines with hydraulic type transmissions so that the transmission will shift below the full torque rating of the engine. It is a mechanical governor and the lower shift point is set by shims regulated by a hydraulic shifter. The transmission provides the hydraulic pressure for the knockdown operation. Is this it, Jim? | ||
| jim mci-9 (209.240.205.60) Rating: N/A |
i haven't seen that 1....the old 5105 ive got , with the hydraulic trans, uses a dashpot type air valve, directly connected to the rack, to pull the rack to "no-fuel", in order to shift from torque drive to direct drive.... i have the plain limiting speed governor on my 671....it has a single bellcrank... the dashpot on the other end of the rack is what kills the engine when the ignition switch is turned off....the governor that derates in upper gears just seems to add a an internal air cylinder in the area of the high and low governor springs.... so that the air cylinder creates another hi idle stop...from what i can tell from looking at the 1959 publication i have, is that the economy range and limiting speed governors only have 1 bellcrank....and the fuel modulating governor has 2 bellcranks... the fuel modulating governor has another adjusting screw right underneath the buffer screw.... its for the modulating cam..... ive never seen this type.... only looking at pics in my manual... |
