Toro Groundsmaster 4300-D Service Manual page 221

Disassembling the Steering Cylinder (continued)
Inspecting the Steering Cylinder
Assembling the Steering Cylinder
Groundsmaster ® 4300-D
16226SL Rev C
5. Hold the end of the front shaft and use a twisting and pulling motion to
carefully extract the rear shaft, piston, front shaft, and front head assembly
from the barrel.
6. Remove the cylinder from the vise.
When removing the roll pin from the front and rear shafts, ensure
that the shaft surfaces are not damaged.
7. Remove and discard the roll pin (item 7 in
shaft to the rear shaft. Then, remove the rear shaft, piston, and front head
from the front shaft.
8. Remove and discard the seals, O-rings, and wear ring from the piston and
heads.
Use eye protection such as goggles when using compressed air.
1. Wash all the cylinder components in clean solvent and dry them with
compressed air.
2. Inspect the internal surface of the barrel for deep scratches, out-of-roundness,
and bending.
3. Inspect the head, shaft, and piston for excessive pitting, scoring, and wear.
4. Replace the steering cylinder if the internal components are worn or
damaged.
1. Use a new seal kit and replace all the seals, O-rings, and wear ring to the
piston and heads. Apply clean hydraulic fluid to all the seal kit components
before you install them.
Note: Do not damage the head seals during installation.
2. Install the front head (item 17 in
shaft.
Ensure that you do not damage O-ring (item 6 in
piston is installed over the roll pin hole in the front rod.
3. Install the piston (item 14 in
ring onto the front shaft.
IMPORTANT
Figure
CAUTION
Figure 121) with new seals onto the front
IMPORTANT
Figure 121) with new seal, O-ring, and wear
Page 4–159
121) that secures the front
Figure 121) as
Hydraulic System: Service and Repairs