Checking With the Sight Glass

57X mm 26.04.003

If the transmission is equipped with a sight glass, check the fluid level as follows:

  1. Clean the oil level sight glass. See Fig.

    1. Drain Plug

    2. Fill Plug

    3. Sight Glass

    Fig. 1, Eaton Fuller Transmission With a Sight Glass

  2. Check the fluid level in the sight glass. When the fluid level is at or above 3/4 of the sight glass, then it is at or above the minimum fill level. See Fig.

    1. Full

    2. Low

    Fig. 2, Transmission Fluid Level Sight Glass

  3. If the fluid level is low, check the transmission for leaks, and correct as needed.
  4. If needed, add the recommended fluid, until it is at or above 3/4 of the sight glass. See Table.for approved transmission lubricants.
Note:
Parent topic: Transmission
Document Number: 0000117277
Manual Publication Date: 2024-05-13
Topic Publication Date: 2025-04-05