Service manual

Groundsmaster 3280--D/3320 Hydraulic SystemPage 5 -- 41
Removal (Fig. 32)
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. Disconnect hydraulic hoses from fittings in lift cylin-
der that is to be removed. Allow hoses to drain into a suit-
able container. Remove and discard o--rings.
4. Put caps or plugs on disconnected hoses and fittings
to prevent contamination.
5. Remove one cotter pin (item 9) from the cylinder pin
(item 10). Pull cylinder pin from the lift cylinder and lift
arm.
6. Remove lock nut (item 11) from cap screw (item 2)
that retains lift cylinder to frame.
7. Support lift cylinder and slide cap screw (item 2) from
the lift cylinder and frame.
8. Lower lift cylinder from the frame.
9. Remove hydraulic fittings and o--rings from the lift
cylinder as required. Discard o--rings.
Installation (Fig. 32)
1. Coat new o--rings lightly with clean hydraulic oil.
Install hydraulic fittings with new o--r ings to the lift cylin-
der.
2. Position lift cylinder to the frame with the barrel end
up.
3. Slide cap screw (item 2) through lift cylinder and
frame mounting holes.
4. Align lift cylinder to lift arm mounting holes. Slide cyl-
inder pin (item 10) through the lift cylinder and lift arm.
5. Secure cylinder pin with cotter pin (item 9).
6. Remove caps and plugs from disconnected hoses
and fittings.
7. Install new o--ring(s) and connect hydraulic hoses to
hydraulic fittings on lift cylinder. Tighten hose connec-
tions.
8. Check hydraulic fluid level in reservoir (front axle)
and adjust as required (see Traction Unit Operator’s
Manual).
9. Follow Hydraulic System Start--up procedures.
Hydraulic
System