How to Fill a Cub Cadet Hydro With Fluid

Written by c.l. rease
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Cub Cadet hydrostatic tractors use hydraulic pressure to power their transmissions and attachments that connect to the tractors' hydraulic systems. Low hydrostatic fluid levels decrease the pressure in the system. This causes the system to function at a decreased capacity or stop functioning in extreme cases. Maintaining the correct level of hydraulic fluid in the system ensures the tractor's hydrostatic system operates as designed.

Skill level:
Moderately Easy

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Things you need

  • Phillips screwdriver
  • Socket set
  • Ratchet handle
  • Adjustable wrench
  • Hydraulic fluid

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  1. 1

    Flip the tractor seat toward the steering wheel.

  2. 2

    Remove the two frame bracket screws holding one frame bracket to the seat by turning them counterclockwise with a Phillips screwdriver. Slide the seat from the tractor. Set the seat aside.

  3. 3

    Match a socket to the size of the bolts connecting the frame cover to the tractor. Connect the matched socket to a ratchet handle. Turn the two mounting screws counterclockwise to loosen the frame cover. Pull the screws from the cover. Set the cover aside.

  4. 4

    Turn the vent bolt located in front of the clear expansion tank counterclockwise with an adjustable wrench. Remove the bolt from the transmission.

  5. 5

    Pour hydraulic fluid into the vent hole. Stop pouring when the fluid level reaches the "Full" line.

  6. 6

    Tighten the vent bolt into the threaded hole with the adjustable wrench.

  7. 7

    Reattach the frame cover to the tractor. Slide the seat onto the seat bracket.

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