Toro Greensmaster 3120 Service Manual page 178

Removing the Steering Cylinder
Installing the Steering Cylinder
Hydraulic System: Service and Repairs
1. Park the machine on a level surface. Lower the cutting units, stop the engine,
engage the parking brake and remove the key from the ignition switch.
2. Read and adhere to the information provided in
Removing and Installing the Hydraulic System Components (page
3. Label all hydraulic connections for proper assembly.
Before opening the hydraulic system, relieve the hydraulic system
pressure to avoid injury from pressurized hydraulic fluid; refer to
Relieving Pressure from the Hydraulic System (page
4. Disconnect the hydraulic hose assemblies from the hydraulic fittings. Allow
the hoses to drain into a suitable container. Cap and plug the hydraulic hoses
and fittings to prevent system contaminations.
5. Remove the two (2) jam nuts and the flat washer from the rod end at the rear
wheel caster fork. Use a suitable tool (pickle fork) to separate the rod end
from the caster fork.
6. Remove the lock nut and the flat washer from the barrel mounting stud and
remove the steering cylinder from the machine.
7. If hydraulic fittings are to be removed from the cylinder, mark the fitting
location and orientation to allow for correct assembly. Remove the fittings
and discard the O−rings.
8. If the rod end (item
fully retract the cylinder rod and measure and record the distance from
the rod end to the cylinder for assembly purpose. Loosen the jam nut and
remove the rod end and the jam nut from the cylinder rod.
1. If rod the rod end was removed from the cylinder rod, fully retract the cylinder
rod and thread the jam nut and the rod end onto shaft so to the distance
recorded during removal. Tighten the jam nut to retain the rod end.
Note: Inspect the threads and the sealing surfaces of the hydraulic fittings
and the hydraulic hoses prior to installation. Replace any damaged or worn
fittings or hoses.
2. Lubricate and fit new O-rings onto the cylinder fittings. Install the fittings
making sure that the fitting location and orientation is as noted during
removal. Tighten fittings as specified; refer to
(SAE Straight Thread O-Ring Fittings) (page
3. Thoroughly clean the tapered surfaces of the rod end and the tapered bore
on the caster fork.
4. Secure the rod end to the caster fork with a flat washer and two jam nuts.
Tighten the first jam nut from 88 to 108 N∙m (65 to 80 ft-lb). While holding
the first jam nut stationary, tighten the second jam nut from 88 to 108 N∙m
(65 to 80 ft-lb).
5. Fit the steering cylinder over the barrel mounting stud and install the flat
washer and the lock nut. Tighten lock nut from 162 to 217 N∙m (120 to 160
ft-lb).
6. Remove the plugs and the caps from the hydraulic hoses and fittings. Using
the labels placed during removal, connect the hydraulic hoses to the cylinder
CAUTION
1 in Figure 80) is to be removed from the cylinder rod,
Page 4–132
General Precautions for
4–71).
4–4).
Installing the Hydraulic Fittings
4–10).
Greensmaster 3120
17230SL Rev C