Flush Hydraulic System - Toro Sand Pro 5040 Service Manual

Flush Hydraulic System

IMPORTANT: Flush the hydraulic system any time
there is a severe component failure or if the system
is contaminated (oil appears milky, black or con-
tains metal particles).
IMPORTANT: Flush hydraulic system when chang-
Ing from petroleum base hydraulic fluid to a biode-
gradable fluid such as Toro Biodegradable
Hydraulic Fluid.
IMPORTANT: If a failure occurs in the traction cir-
cuit, traction circuit component disassembly and
thorough cleaning may be required to remove con-
taminates from the traction circuit. Because the
traction circuit is a closed loop, any contamination
will remain in the circuit and can cause additional
component damage unless it is removed.
1. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for at least four (4)
hours.
2. Park machine on a level surface, lower attachment,
stop engine, apply parking brake and remove key from
ignition switch.
WARNING
Before disconnecting or performing any work
on the hydraulic system, all pressure in the
system must be relieved. See Relieving Hy-
draulic System Pressure in the General Infor-
mation section.
IMPORTANT: Make sure to thoroughly clean around
all hydraulic connections that will be disassembled.
3. Drain hydraulic tank (see Operator's Manual).
4. Drain hydraulic system. Drain all hoses, tubes and
components while the system is warm.
5. Change and replace hydraulic oil filter (see Opera-
tor's Manual).
Sand Pro & Infield Pro 3040/5040
6. Inspect and clean hydraulic oil tank (see Hydraulic
Tank Inspection in this section).
7. Reconnect all hydraulic hoses, lines and compo-
nents that were disconnected to drain hydraulic system.
NOTE: Use only hydraulic fluids specified in Operator's
Manual. Other fluids may cause system damage.
8. Fill hydraulic tank with new hydraulic fluid (see Oper-
ator's Manual).
9. Disconnect and ground engine spark plug wires to
prevent the engine from starting. Make sure that traction
pedal and lift control lever are in the neutral position.
10.Turn ignition key switch to START and engage start-
er for 10 seconds to prime the hydrostat. Repeat this
step again.
11. Connect spark plug wires to spark plugs.
12.Start engine and let it run at low idle (1750 RPM) for
a minimum of 2 minutes. Increase engine speed to high
idle (3400 RPM) for a minimum of 1 minute under no
load.
13.Raise and lower attachment several times. On Sand
Pro 5040 and Infield Pro 5040 machines, turn steering
wheel fully left and right several times.
14.Shut off engine and check for hydraulic oil leaks.
Check oil level in hydraulic tank and add correct amount
of oil if necessary (see Operator's Manual).
15.Operate the machine for 2 hours under normal oper-
ating conditions.
16.Check condition of hydraulic oil. If the new fluid
shows any signs of contamination, repeat steps 1
through 14 again until oil is clean. If changing to biode-
gradable fluid, repeat steps 1 through 14 again at least
once and until the oil is clean.
17.Assume normal operation and follow recommended
maintenance intervals.
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