Toro Greensmaster TriFlex 3400 - Flush Hydraulic System

Greensmaster 3300/3400 Hydraulic SystemPage 5 -- 57
Flush Hydraulic System
IMPORTANT: Flush the hydraulic system any time
thereis aseverecomponent failureorthe system is
contaminated (oil appears milky or black or con-
tains metal particles).
IMPORTANT: Flush hydraulic system when chang-
Ing from petroleum base hydraulic fluid. Operate
machine under normal operating conditions for at
least four (4) hours before draining.
1. Parkmachineonalevelsurface,engagetheparking
brake, lower the cutting units and stop the engine. Re-
move key from the ignition switch.
CAUTION
Before continuing further, read and become fa-
miliar with General Precautions for Removing
and Installing Hydraulic System Components in
this section.
2. Clean area around gear pump suction (inlet) hose
(Fig. 36). Clamp pump inlet hose. Remove inlet hose
from gear pump, releaseclampanddrain reservoir into
asuitablec ontainer.Drainentirehydraulicsystemwhile
making sure lift cylinders, hydraulic hoses, hydraulic
tubes and all other components are drained from low
points while the system is warm.
3. Clean oil filter mounting area. Remove filter and
drain into a s uitable container. Discard filter.
4. Inspectandcleanreservoir(seeHydraulicReservoir
in this section).
5. Make sure filter mounting surface is clean. Apply
cleanhydraulicoiltogasketonthenewfilter.Screwfilter
on until gasketcontacts mounting plate, then tightenfil-
ter an additional 3/4 turn.
NOTE: Use only hydraulic fluids (including biodegrad-
able fluid) specified in the Traction Unit Operator’s
Manual. Other fluids could cause system damage.
6. Connect all hydraulic hoses and lines that were dis-
connectedpriortosystemdraining(seeHydraulicHose
andTubeInstallationin theGeneralInformationsection
of this chapter).
7. Fill hydraulic reservoir with new hydraulic oil.
8. Disconnect appropriate electrical component(s) to
prevent the engine from starting:
A. On machines with gasoline engine, disconnect
both spark plug wires from spark plugs.
B. On machineswithdieselengine,disconnectwire
harness electrical connector from the engine fuel
stop solenoid.
9. Turn ignition key switch and engage starter for ten
(10) seconds to the prime pump. Return ignition switch
tooffandwaitone(1)minutetoallows tartertocool.Re-
peat step a second time.
10.Reconnectengineelectricalcomponent(s)thatwere
disabled in step 8 above.
11.Startengineandletitrunatlowidlespeedforamini-
mum of two (2) minutes.Increase engine speed to high
idle for a minimum of one (1) minute under no load.
12.Raise and lower cutting units several times.
13.Shut off engine and check for hydraulic oil leaks.
Check oillevel in hydraulicreservoir and add correctoil
if necessary.
14.Operate themachine fortwo (2)hours undernormal
operating conditions.
15.Check condition of hydraulic oil. If the new fluid
showsanysignsofcontaminationorifyouarechanging
tobiodegradable fluid,repeat steps1 through14 again.
16.Assume normaloperation andfollowrecommended
maintenance intervals.
Figure 36
1. Gear pump 2. Suction (inlet) hose
1
2
GR3300 GEAR PUMP SHOWN
Hydraulic
System