CHANGE 1
3-29-79
TM 5-3810-300-24 & P2
Listed below are the RTO-613T specifications.
Speeds - 13 forward, 3 reverse.
Clutch Housing Size - SAE No. 2, gray iron, deep only, 6-5/8", for push or pull type clutches.
Power Take-off -
Openings: Two SAE standard for 6/8 pitch gears.
Right Side: Regular duty type, 6 bolt. PTO shaft projections limited.
Bottom Side: Heavy duty type, 8 bolts.
PTO Gear Speeds -
Right and Bottom: 33-tooth 6/8 pitch gears turning at .723 engine speed.
Weight - 620 lbs.
Length - 34-11/16" from face of clutch housing to end of splines on tail shaft.
The gears within the transmission .are changed by a gearshift lever..
The remote shift control unit includes the gearshift lever and tower (master control unit), the shift control housing
assembly (slave unit) and shift control shaft. The master control unit is mounted to the chassis so that the lever will
protrude into the cab Just beside the drivers seat. The shift control housing assembly is mounted on the transmission
shaft bar housing, where the shift fingers from the housing engage the shift bars and blocks. The shift control shaft
transmits motion of the gearshift lever to the shift bar housing and the shift fingers inside the transmission.
Safety Neutral Switch.
Mounted on top of the transmission is a Safety Neutral Switch. The switch prevents engine start up from the
Superstructure Cab when the transmission is in gear. Lockout of the start system is through the start relay.
Back-Up Lamp Switch.
Mounted on the transmission next to the slave unit is the Back-Up Lamp Switch. When the transmission is shifted into
reverse a circuit is complete to the Carrier Back-Up Light and lights the light.
RT0613 GEAR RATIOS
Ratio
% Step
.80
25
1.00
29
Direct Range
1.29
28
1.65
27
2.11
Range Shift
28
4-27