Checking at the Sight Glass

4700 mm 26.01.006

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.

    Table 1,  Eaton and Meritor Approved Transmission Lubricants

    Eaton and Meritor Approved Transmission Lubricants
    Transmission Model Lubricant Type1 Temp. Range SAE Viscosity

    Eaton Fuller

    Synthetic transmission lubricant meeting Eaton PS-386 lubricant specification

    All

    —

    Meritor

    Synthetic engine oil meeting Meritor specification 0–81, or MIL–L–2104D or E

    All

    50W
    1. Do not mix types or brands of fluid. Multiweight and extreme-pressure gear fluids are not recommended.

    Table 1,  Eaton and Meritor Approved Transmission Lubricants

Note:
Parent topic: Transmission Fluid Level Inspection
Document Number: 0000120459
Manual Publication Date: 2024-05-23
Topic Publication Date: 2024-10-31