Multi Pro 5800 Hydraulic SystemPage 5 − 53
Flush Hydraulic System
IMPORTANT: Flush the hydraulic system any time
there is a severe component failure or the system is
contaminated. Contaminated oil appears milky,
black or contains metal particles.
1. Make sure hydraulic oil is warm by operating the ma-
chine for at least ten (10) minutes. Park machine on a
level surface. Stop engine, apply parking brake and re-
move key from ignition switch.
IMPORTANT: Follow all local codes and regulations
when recycling or disposing hydraulic fluid and fil-
ters.
2. Clean area around hydraulic filter mounting areas
and remove both hydraulic filters. Drain filters into a suit-
able container.
3. Drain hydraulic reservoir into a suitable container.
4. Drain hydraulic system. Drain all hoses and compo-
nents while the system is warm.
5. Make sure filter mounting surface is clean. Apply
clean hydraulic oil to gasket on both new filters. Screw
filter onto filter head until gasket contacts mounting sur-
face, then tighten filter 3/4 turn further.
6. Reinstall all hoses and hydraulic components.
IMPORTANT: Use only hydraulic fluids specified in
Operator’s Manual. Other fluids could cause system
damage.
7. Fill hydraulic oil reservoir with NEW hydraulic fluid.
8. Prime hydraulic pumps (see Priming Hydraulic
Pumps in this chapter).
9. Start engine and run at low idle speed (Diesel en-
gine = 1200 to 1300 RPM, Gasoline engine = 1000
RPM) for a minimum of two (2) minutes.
10.Increase engine speed to high idle (Diesel engine =
3050 to 3150 RPM, Gasoline engine = 3200 RPM) for
minimum of one (1) minute under no load.
11.Turn steering wheel in both directions several times.
12.Raise and lower spray booms several times.
13.Shut off engine and check for hydraulic oil leaks.
Check oil level in hydraulic reservoir and add correct oil
if necessary (see machine Operator’s Manual).
14.Operate the machine for two (2) hours under normal
operating conditions.
15.Check condition of hydraulic oil. If the fluid shows any
signs of contamination, repeat system flushing proce-
dure again.
16.When no signs of contamination are evident, resume
normal operation and follow recommended mainte-
nance intervals.
Hydraulic
System
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