Transmission shifting Flashcards
the range gearing of the auxiliary section will provide what type of gear ratio change
lar. for gear ratio changes for example an auxiliary section that only has range shift could have each gear ratio change as much as 30 to 40 % from one range to he next
the splitter type gearing will provide what type of gear ratio change
small ratio changes for example a transmission that utilizes only a splitter type ratio change in the auxiliary section would have ratio changes as little as 15 to 20 % from one splitter position to another
what is a master air control valve
a shifter knob with one or more moveable buttons protruding from the control valve
what are the buttons on the master control valve for
for shifting the auxiliary section of the transmission with air
having the air shift buttons in the mainsection shift lever will allow the operator to do what
shift both man and auxiliary sections of the transmission with one hand
what might prevent the operator from shifting the transmission after a vehicle has been parked in the winter
moisture frozen in the main air supply line for the shifter
what is one of the first checks to preform if air shift problems occur
system air pressure
is the regulator a serviceable item
not normally that is why it will usually be replaced as a sealed unit
where is the master air control valve generally mounted
to the gearshift lever assembly
what is the purpose of the slave air valve
allows the operator to preselect the range shift by inhibiting the shift until the main section is in the neutral position
where does the slave air valve receive air supply from
the filter regulator
what holds the slave valve in place when the mainsection is not in neutral to prevent it from shifting from high to low range
actuating pin held in place by the air valve shaft every time one of the shift rails is in a position other than neutral
the range cylinder is typically a
double acting cylinder that uses air pressure to shift in either direction
why do small diameter plastic lines use brass ferrules/insert type fittings
to prevent crushing the air line and provide for a good seal
why are rubber coated cloth braid air lines used to supply constant regulated air to the slave valve and slitter/deep reduction cylinder
because they have a larger ID and are more flexible . the large ID will supply the large volume of air to the slave/splitter reduction cylinder that is required to quickly shift the range cylinder
