Multi Pro 5800 Hydraulic SystemPage 5 − 87
Removal (Fig. 63)
1. Park the machine on a level surface, fully lower the
spray booms, engage the parking brake and stop the
engine. Remove the key from the ignition switch.
WARNING
Make sure that spray booms are fully lowered be-
fore loosening hydraulic lines, cartridge valves
or plugs from lift control manifold. If booms are
not fully lowered as manifold components are
loosened, booms may drop unexpectedly.
CAUTION
Rotate steering wheel and depress traction ped-
al in both forward and reverse to relieve hydrau-
lic system pressure and to avoid injury from
pressurized hydraulic oil.
2. Operate all hydraulic controls to relieve hydraulic
system pressure.
3. Read the General Precautions for Removing and
Installing Hydraulic System Components at the begin-
ning of the Service and Repairs section of this chapter.
4. Label all control manifold electrical and hydraulic
connections for assembly purposes.
5. Disconnect wire harness electrical connectors from
solenoid valve coils on lift control manifold.
6. Thoroughly clean hydraulic hose ends and fittings
prior to disconnecting the hoses from boom lift manifold.
NOTE: The ports on the boom lift manifold are marked
to identify hydraulic hose connections. Example: P is the
pump connection port (see Hydraulic Schematic in
Chapter 8 − Foldout Drawings to identify the function of
the hydraulic lines and cartridge valves at each manifold
port location).
7. Disconnect hydraulic hoses from fittings in boom lift
manifold. Allow hoses to drain into a suitable container.
8. Put caps or plugs on disconnected hoses and fittings
to prevent contamination.
9. Remove two (2) flange nuts and cap screws that se-
cure boom lift manifold to mount plate. Remove man-
ifold from machine.
Installation (Fig. 63)
1. Position boom lift control manifold to mount plate.
Secure manifold to plate with two (2) cap screws and
flange nuts.
2. Remove caps and plugs from disconnected hoses
and fittings.
3. Lubricate new O−rings and install on fittings. Using
labels placed during removal, correctly connect hydrau-
lic hoses to lift control manifold fittings. Tighten hose
connections (see Hydraulic Hose and Tube Installation
in the General Information section of this chapter).
4. Using labels placed during removal, correctly con-
nect wire harness connectors to manifold solenoid valve
coils.
5. Check fluid level in hydraulic oil reservoir and adjust
as required (see machine Operator’s Manual).
6. After assembly is completed, operate boom cylin-
ders to verify that hydraulic hoses and fittings are not
contacted by anything and that there are no leaks.
Hydraulic
System
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