Service Manual

Multi Pro 5800 Hydraulic SystemPage 5 − 81
Removal (Fig. 67)
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 hydraulic hoses for assembly purposes. Thor-
oughly clean hydraulic hose ends prior to disconnecting
the hoses from boom lift cylinder.
5. Disconnect hydraulic hoses from boom lift cylinder.
Allow hoses to drain into a suitable container.
6. Put caps or plugs on disconnected hoses and cylin-
der ports to prevent contamination.
7. Remove hitch pin and clevis pin (item 6) that secure
lift cylinder rod end to boom pivot bracket.
8. Remove flange head screw and flange nut that se-
cure pivot pin (item 2) to cylinder mount plate. Slide pivot
pin from mount plate and lift cylinder.
9. Remove lift cylinder from machine.
Installation (Fig. 67)
1. Apply grease to cylinder barrel pivot and rod end and
position lift cylinder to cylinder mount plate and boom
pivot bracket.
2. Slide pivot pin (item 2) through cylinder mount plate
and lift cylinder. Secure pivot pin to mount plate with
flange head screw and flange nut.
3. Secure lift cylinder rod end to boom pivot bracket
with clevis pin (item 6) and hitch pin.
4. Remove caps and plugs from disconnected hoses
and cylinder ports.
5. Lubricate new O−rings and connect hydraulic hoses
to boom lift cylinder. Tighten hose connections (see Hy-
draulic Hose and Tube Installation in the General Infor-
mation section of this chapter).
6. Check fluid level in hydraulic oil reservoir and adjust
as required.
7. After assembly is completed, operate boom lift cylin-
der to verify that hydraulic hoses and cylinder are not
contacted by anything and that there are no leaks.
8. Adjust lift cylinder rod end as necessary so booms
are level when the lift cylinder is fully extended.