Service Manual

Groundsmaster 4500-- D/4700--D Hydraulic SystemPage 4 -- 129
Removal (Fig. 107)
NOTE: The ports on the fan control manifold are
marked for easy identification of components. Example:
P1 is the gear pump connection port (see Hydraulic
Schematics in Chapter 9 -- Foldout Drawings to identify
the function of the hydraulic lines and cartridge valves
at each manifold port).
1. Park machine on a level surface, lower cutting
decks, stop engine, apply park ing brake and remove
key from the ignition switch.
2. Read the G eneral Precautions for Removing and
Installing Hydraulic System Components at the begin-
ning of the Service and Repairs section of this chapter.
3. Unlatch and raise hood.
4. To prevent contamination of hydraulic system during
fan control manifold removal, thoroughly clean exterior
of manifold.
5. Label wire harness electrical connectors that attach
to manifold solenoid coils. Disconnect connectors from
the solenoid coils.
6. Disconnect hydraulic lines from manifold and put
caps or plugs on open hydraulic lines and fittings. Label
disconnected hydraulic lines for proper assembly.
7. Remove hydraulic manifold from the frame using
Figure 107 as guide.
8. If hydraulic fittings are to be removed from fan control
manifold, mark fitting orientation to allow correct assem-
bly (Fig. 108). Remove fittings from manifold and dis-
card O--rings.
Installation (Fig. 107)
1. If fittings were removed from fan control manifold, lu-
bricate a nd place new O--rings onto fittings. Install fit-
tings into manifold ports using marks made during the
removal process to properly orientate fittings. Tighten
fittings (see Hydraulic Fitting Installation in the General
Information section of this chapter). Refer to Figure 108
for fitting installation torque.
2. Install hydraulic manifold to the frame using Figure
107 as guide.
3. Remove caps and plugs from fittings and hydraulic
lines. Properly connect hydraulic lines to manifold (see
Hydraulic Hose and Tube Installation in the General In-
formation section of this chapter).
4. Connect wire harness electrical connectors to the
manifold solenoid valves.
5. Lower and secure hood.
1. O--ring
2. Straight fitting (7 used)
3. O--ring
4. Dust cap
5. Test fitting
6. O--ring
Figure 108
4
6
3
2
1
5
UP
2
2
2
2
2
50 ft--lb
(68 N--m)
Hydraulic
System