Service manual

Groundsmaster 3280--D/3320 Hydraulic SystemPage 5 -- 47
Removal (Fig. 36)
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. Read the General Precautions for Removing and
Installing Hydraulic System Components at the begin-
ning of the Service and Repairs section of this chapter.
CAUTION
Operate all hydraulic controls to relieve system
pressure and avoid injury from pressurized hy-
draulic oil.
3. Label all hydraulic connections for assembly pur-
poses. Clean hydraulic hose ends prior to disconnecting
the hoses.
4. Disconnect hydraulic hoses from steering cylinder.
5. Put caps or plugs on disconnected hoses and fittings
to prevent contamination.
6. Remove cap screws (items 12 and 6) and lock nuts
(items 7 and 11) that secure steering cylinder to ma-
chine.
7. Pull steering cylinder from machine. Locate and re-
trieve spacer ring (item 13) and washer (item 9) and note
location for installation purposes (Fig. 37).
8. Remove hydraulic fittings from steering cylinder if re-
quired. Note orientation of 45
o
fitting before removing
from steering cylinder.
Installation (Fig. 36)
1. Coat new o--rings lightly with clean hydraulic oil. If re-
moved, install hydraulic fittings with new o--rings to the
steering cylinder. Make sure that 45
o
fitting is positioned
correctly.
2. Position steering cylinder to machine. Make sure to
place spacer ring (item 13) and washer (item 9) in loca-
tions noted during removal (Fig. 37).
3. Secure steering cylinder to machine with cap screws
(items 12 and 6) and lock nuts (items 7 and 11). Torque
lock nuts from 130 to 150 ft--lb (176 to 203 N--m).
4. Remove caps and plugs from hydraulic hoses and
fittings.
5. Correctly connect hydraulic hoses to steering cylin-
der.
6. Check hydraulic fluid level in reservoir (front axle)
and adjust as required (see Traction Unit Operator’s
Manual).
7. Lubricate cylinder grease fittings (see Traction Unit
Operator’s Manual).
8. Follow Hydraulic System Start--up procedures.
9. Check that steering cylinder does not contact the
axle or frame as cylinder moves from fully retracted to
fully extended.
1. Cap screw
2. Washer
3. Steering pivot mount
4. Lock nut
5. Steering cylinder
6. Spacer ring
7. Cap screw
8. Axle cylinder mount
9. Lock nut
Figure 37
2
3
4
5
6
1
9
8
7
Hydraulic
System