Service Manual

MOWER DECKS

7-54 Z580/Z593/Z595 Diesel Service Manual

Changing Gearbox Oil

Service Interval: Initial at 100 hours, then yearly.

1. Remove the gearbox assembly from the machine.

Refer to “Gearbox Assembly Removal” on page

7-44.

Note: The pulleys do not have to be removed from

the gearbox.

2. Remove the 2 plugs located on the side and rear of

the gearbox assembly (Fig. 886).

Fig 886 PICT-3899

Checking the Gearbox Oil Level

1. Park the machine on a level surface.

2. Disengage the PTO, move the motion control levers

to the neutral locked position and set the parking

brake.

3. Stop the engine, remove the key, and wait for all

moving parts to stop before leaving the operating

position.

4. Remove the side or rear plug on the gear box (Fig.

885).

Note: Gearbox removed from machine for photo

clarity.

Fig 885 PICT-3899

5. The oil should be up to the opening of the gear box.

6. Add oil if needed to bring it to the correct level. Use

SAE 75W–90 Synthetic Gear Lube.