Greensmaster 3150 Hydraulic SystemPage 4 -- 51
Flush Hydraulic System
IMPORTANT: Flush the hydraulic system any time
thereis aseverecomponent failure orthe system is
contaminated (oil appears milky or black or con-
tains metal particles).
IMPORTANT: Flush hydraulic system when chang-
Ing from petroleum base hydraulic f luid. Operate
machine under normal operating conditions for at
least four (4) hours before draining.
1. Park the machine on a level surface, engage the
parking brake, lower the cutting units and stop the en-
gine. Remove key from the ignition switch.
CAUTION
Before continuing further, read and become fa-
miliar with General Precautions for Removing
and Installing Hydraulic System Components.
2. Clean area around gear pump and pump inlet hose
(Fig. 34). Clamp pump inlet hose. Remove hose from
gearpump,releaseclampanddrainreservoirintoasuit-
able container. Drain hydraulic system while making
sure lift cylinders, hydraulic hoses, hydraulic tubes and
all other components are drained from low points while
the system is warm.
3. Clean hydraulic oil filter mounting area. Remove fil-
ter and drain into a suitable container. Discard filter.
4. Inspect andclean hydraulicreservoir (seeHydraulic
Reservoir in the Service and Repairs section of this
chapter).
5. Make surefiltermountingsurface isclean. Apply hy-
draulic oilto gasket onthe newfilter.Screwfilter on until
gasket contacts mounting plate, then tighten filter 3/4
turn further.
NOTE: Use only hydraulic fluids (including biodegrad-
able) specified in t he Traction Unit Operator’s Manual.
Other fluids could cause system damage.
6. Reconnect all hydraulic hoses and lines that were
disconnected prior to draining. Fill hydraulic reservoir.
7. Disconnect both spark plug wires from spark plugs
to prevent the engine from starting.
8. Turn ignition key switch; engage starter for ten (10)
seconds toprime thehydraulic pumps. Allowthe starter
to cool for one (1) minute and then repeat this step
again.
9. Reconnect both spark plug wires to spark plugs.
10.Startengineandletitidleatlowspeedforaminimum
oftwo(2)minutes.Increaseenginespeedtohighidlefor
minimum of one (1) minute under no load.
11.Raise and lower cutting units several times. Rotate
steering wheel in both directions several times.
12.Shut off engine and check for hydraulic oil leaks.
Check oil level in hydraulic reservoir and add correct oil
if necessary.
13.Operate themachine fortwo (2) hoursunder normal
operating conditions.
14.Check condition of hydraulic oil. If the new hydraulic
oil shows any signs of contamination, or if you are
changingto biodegradable fluid, repeat steps1 through
13 again.
15.Assume normal operationand follow recommended
maintenance intervals.
Figure 34
PUMP INLET HOSE
Hydraulic
System
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