Checking Gearbox Fluid; Replacing The Castor Wheel Fork Bushings - Toro 74191 Operator's Manual

Maintenance

Checking Gearbox Fluid

The gearbox fluid must be checked after every 100
operating hours. Check all three gearboxes.
1. Warm the fluid in gearbox. Run the mower deck
for a few minutes.
2. Raise deck to upright position.
3. Remove plug on the side of the gearbox. The
fluid level must be up to side hole in gearbox
(Fig. 32).
4. If needed, fill automatic transmission fluid
(Dexron III or equivalent) into top hole until it
runs out the side hole in gearbox. It is full when
it runs out the side hole (Fig. 32).
IMPORTANT: Do not mix fluids. Use only
Automatic Transmission Fluid.
5. Reinstall the top and side plugs into gearbox
using pipe sealant (Fig. 32).
6. Fill gearbox with automatic transmission fluid
(Dexron III or equivalent).
7. Repeat for remaining gearboxes.
38
Replacing the Castor Wheel
Fork Bushings
The castor wheel forks are mounted in bushings
pressed into the top and bottom of the carrier frame
mounting tubes. To check the bushings, move the
castor forks back and forth and side-to-side. If a
castor fork is loose, the bushings are worn and must
be replaced.
1. Raise the cutting unit to the vertical position.
2. Remove the retaining ring and thrust washer(s)
from the top of the castor wheel fork (Fig. 33).
3. Pull the castor wheel fork out of the mounting
tube, leaving the spacer and thrust washers on
the bottom of the fork. Remember the location of
thrust washers on each fork to ensure correct
installation, and to maintain a level deck.
1
3
4
5
Figure 33
1. Retaining ring
2. Thrust Washer (4)
3. Carrier Frame Mounting
Tube
2
2
4. Spacer
5. Castor Wheel Fork