Service manual
Groundsmaster 3280--D/3320 Hydraulic SystemPage 5 -- 43
Removal (Fig. 33)
1. Park the machine on a level surface, engage the
parking brake, lower the cutting deck (or implement) and
stop the engine. Remove the key from the ignition
switch.
2. Remove knob from end of parking brake rod.
3. Remove six (6) phillips head screws that secure tow-
er panel to machine. Raise tower panel to allow access
to steering control valve.
4. Read the General Precautions for Removing and
Installing Hydraulic System Components at the begin-
ning of the Service and Repairs section of this chapter.
5. Label all hydraulic connections for assembly pur-
poses. Note port designations on steering control valve
(Fig. 34).Clean hydraulic hose ends prior to disconnect-
ing the hoses.
CAUTION
Operate all hydraulic controls to relieve system
pressure and avoid injury from pressurized hy-
draulic oil.
6. Disconnect hydraulic hoses from steering control
valve. Allow hoses to drain into a suitable container.
7. Put caps or plugs on disconnected hoses and fittings
to prevent contamination.
8. Support steering control valve to prevent it from fal-
ling during removal.
9. Loosen and remove four (4) socket head screws
(item 20) and spring washers (item 19) that secure
steering control valve to steering column.
10.Slide steering control valve from steering column
and remove from machine.
Installation (Fig. 33)
1. Slide steering c ontrol valve onto steering column.
Secure steering control valve to steering column with
four (4) socket head screws (item 20) and spring wash-
ers (item 19).
2. Remove caps and plugs from disconnected hoses
and fittings.
3. Lubricate new o--rings and connect hydraulic hoses
to steering control valve. Tighten hose connections.
4. Position tower panel in place and secure with six (6)
phillips head screws.
5. Install knob on end of parking brake rod.
6. Check hydraulic fluid level in reservoir (front axle)
and adjust as required (see Traction Unit Operator’s
Manual).
7. After assembly is completed, rotate steering w heel
to verify that hydraulic hoses and fittings are not con-
tacted by anything and that there are no leaks.
8. Follow Hydraulic System Start--up procedures.
Figure 34
Hydraulic
System