Provisions for Rear-Mounted Power Take-Off (RMPTO) units are available on these transmissions. The output speed (as a percentage of engine speed) of the RMPTO units, depends on which T300 transmission it is mounted on and is fixed at that percentage, regardless of which transmission gear is selected. The PTO speed to engine RPM percentage for the T313 and T318 series transmissions are all at 70 percent. Lubrication SPLASH LUBRICATION All parts inside the transmission are lubricated by a splash-and-gravity system. To minimize churning, only the lower countershaft dips into the lubrication oil.
As the gears on that countershaft spin, a constant spray of oil is directed to all internal parts of the transmission. The oil cools as it circulates over the aluminum case. Troughs and passages, cast into the inside of the case, capture and direct oil to the bearings. 9 The bearings are housed in cast-iron bearing retainers (covers). Tapered roller bearings are used at each end of all transmission countershafts. All gears are of the spur-type design and are in constant mesh with mating gears. All shifting is done by forks and sliding clutches. The shift rails and forks are integral with the shift cover for the main case.
The six countershafts, three in the main case and three in the rear case, are equally spaced around the mainshafts. This design distributes the load equally among the countershafts, thus keeping normal deflection and gear tooth loading to a minimum. 8 Figure 9 — Splash Lubrication Figure 8 — Equal Torque Distribution Page 19 DESCRIPTION AND OPERATION