Greensmaster 3250--D Hydraulic SystemPage 4 -- 5 3
Flush Hydraulic System
IMPORTANT: Flush the hydraulic system any time
thereis asevere component failure ort he systemis
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. 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. Cleanareaaroundpistonpumpandpumpinlethose
(Fig. 31). Clamp pump inlet hose. Remove hose from
piston pump, release clamp and drain reservoir into a
suitablecontainer. Drain hydraulicsystem whilemaking
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 and clean hydraulic reservoir (see Hydraulic
Reservoir in the Service and Repairs section of this
chapter).
5. Make sure filter mounting surface is clean.Applyhy-
draulic oil to gasket on the 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 electricalconnector to the fuel stop sole-
noid to prevent engine from starting on diesel engine.
8. Turn ignition key switch; engage starter for ten (10)
seconds to prime the hydraulic pumps. Allow thestarter
to cool for sixty (60) seconds and then repeat this step
again.
9. Connect electrical connector to the fuel stop sole-
noid on diesel engine.
10.Startengineandletitidleatlowspeedforaminimum
oftwo(2)minutes.Increaseenginespeedtohighidlefor
minimum of one (1) minute under no load.
11.Raise and lower cutting units 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 for two (2) hours under n ormal
operating conditions.
14.Check condition of hydraulic oil. If the h ydraulic oil
showsanysignsofcontamination,orify ouarechanging
to biodegradablefluid,repeat steps 1 through13 again.
15.Assume normal operation and follow recommended
maintenance intervals.
Figure 31
PUMP INLET HOSE
Hydraulic
System
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