PISTON 2S8419 - Caterpillar

To make the new groups adaptable to earlier transmissions it is necessary to make modifications to the existing oil lines in the housing group. There are two different oil line designs in earlier transmissions. The parts needed for these modifications are shown in Chart C. Chart C is divided into two different serial number ranges; which are according to the oil line design they are equipped with.
Also, reference can be made to the Engine News, December 16, 1981, pages 4 and 5. This article tells about the use of a new oil supply tube assembly.
Illustration 1. Installation of oil lines and pump group (standard engine rotation).
Illustration 2. Location of the components in the pump drive group. INSTALLATION PROCEDURE:
1. Remove the top cover from the transmission.2. Remove the ahead top shaft assembly from the transmission.3. Remove the existing oil pump drive gear.4. Remove the existing components of the oil pump and lines group from the transmission. Use the procedure in the Service Manual.5. Use a 1 1/2" - 11 1/2 NPTF tap to cut threads in the oil pump outlet hole in the main case. See Illustration 1. Make sure all shavings are removed. Install a 7B9665 Plug.6. Install the components of the pump drive group as shown in Illustration 2. Use a 6V4072 Spanner Wrench to tighten the 5B576 nut to a torque of 400 Nm (300 lb ft). Remove the sharp corner from the edge of the bore in the case before the adapter and O-ring seal are installed. This will prevent possible damage to the seal when it is installed.7. Install the parts from Chart C that are needed to supply oil to the drive. See Illustrations 3 and 4. On transmissions (36W1-36W262) bend the copper tubing as close to the front cover as possible. Make sure the tubing does not make contact with the ahead clutch transfer gear.8. Install the components of the oil pump and lines group as shown in Illustration 1.9. Install the ahead top shaft assembly. Install the top cover.
Illustration 3. Modifications for transmissions (36W1-36W262).
Illustration 4. Modifications for transmissions (36W263-36W320).