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Groundsmaster 4500--D/4700--D Hydraulic SystemPage 4 -- 145
Removal (Fig. 123)
1. Park machine on a level surface, lower cutting
decks, stop engine, engage parking brake and remove
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.
3. To prevent contamination of hydraulic system during
lift cylinder removal, thoroughly clean exterior of lift cyl-
inder.
WARNING
Make sure that cutting decks are fully lowered
before loosening hydraulic lines from lift cylin-
der. If decks are raised as hydraulic lines are
loosened, decks may drop unexpectedly.
4. Disconnect hydraulic hoses from lift cylinder. Put
caps or plugs on open hydraulic hoses and fittings to
prevent system contamination. Label the hydraulic
hoses toshow their correct position onthe liftcylinder for
assembly purposes.
5. Remove lock nuts (item 2) that secure link assembly
(item 4). Remove rear link (item 3) from link assembly.
Pull link assembly from lift arm assembly, lift links (item
13) and cylinder shaft clevis which will free lift cylinder
from lift arm. Locate and remove plastic rollers (item 5)
positioned on both sides of cylinder clevis.
6. Remove one retaining ring that secures the cylinder
pin (item 7) to the lift arm support. Pull pin from lift arm
and cylinder barrel clevis.
7. Remove lift cylinder from machine.
8. If hydraulic fittings are to be removed from lift cylin-
der, mark fitting orientation to allow correct assembly.
Remove fittings from cylinder and discard O--rings.
NOTE: For lift cylinder disassembly and assembly pro-
cedures, see Lift Cylinder Service in this section.
Installation (Fig. 123)
1. If fittings were removed from lift cylinder, lubricate
and place new O--rings onto fittings. Install fittings into
cylinder openings usingmarks made during the removal
process to properly orientate fittings. Tighten fittings
(see Hydraulic Fitting Installation in the General Infor-
mation section of t his chapter).
2. Position cylinder barrel clevis to lift arm and insert
cylinder pin (item 7) into lift arm support and cylinder
clevis. Secure pin with retaining ring (item 6). Make sure
that retaining ring is fully installedingrooveinpin.
3. Position plastic rollers (item 5) to cylinder shaft cle-
vis. Insert link assembly (item 4) t hrough lift arm as-
sembly, lift links (item 13), plastic rollers and cylinder
shaft clevis. Install rear link (item 3) to link assembly and
secure assembly with lock nuts (item 2).
4. Remove caps and p lugs from hydraulic hoses and
fittings. Attach hoses to lift c ylinder fittings (see Hydrau-
lic Hose and Tube Installation inthe General Information
section of this chapter).
5. Fill reservoir with hydraulic fluid as required.
6. Lubricate lift cylinder grease fittings.
7. After assembly is completed, operate lift cylinder to
verify that lift cylinder, hydraulic hoses and fittings do not
contact any machine components during operation.
Figure 124
#4 Deck #1 Deck #5 Deck
#7 Deck
(GM4700)
#6 Deck
(GM4700)
#3
Deck
#2
Deck
CUTTING DECK LOCATIONS
Hydraulic
System