Flush Hydraulic System - Toro Greensmaster 3250-D 04383 Service Manual

Flush Hydraulic System

IMPORTANT: Flush the hydraulic system any time
there is a severe component failure or the 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. Park machine on a level surface. Lower cutting
units, stop engine, and engage parking.
CAUTION
Before continuing further, read and become fa-
miliar with General Precautions for Removing
and Installing Hydraulic System Components.
2. Clean area around hydrostat and pump inlet hose.
Clamp pump inlet hose. Remove hose from hydrostat,
release clamp, and drain reservoir into a suitable con-
tainer. Drain hydraulic system while making sure lift cyl-
inders, hoses, tube lines, and all other components are
drained from low points while the system is warm. Dis-
card filter (Fig. 41).
3. Clean oil filter mounting area. Remove filter and
drain into a suitable container. Discard filter (Fig. 42).
4. Inspect and clean reservoir (see Inspecting Reser-
voir Parts).
5. Make sure filter mounting surface is clean. Apply hy-
draulic oil to gasket on the new filter. Screw filter on until
gasket contacts mounting plate, then tighten filter half a
turn.
Note: Use only hydraulic fluids (including biodegrad-
able) specified in Checking Hydraulic System Fluid in
General section. Other fluids could cause system dam-
age.
6. Reconnect all hydraulic hoses and lines that were
disconnected prior to draining. Fill hydraulic reservoir.
7. Disconnect electrical connector to the fuel stop so-
lenoid to prevent engine from starting on diesel engine.
8. Turn ignition key switch; engage starter for ten (10)
seconds to the prime pump. Allow the starter to cool and
repeat this step again.
9. Connect electrical connector to the fuel stop sole-
noid on diesel engine.
Greensmaster 3250--D
10. Start engine and let it idle at low speed for a mini-
mum of two (2) minutes. Increase engine speed to high
idle for 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 the machine for two (2) hours under normal
operating conditions.
14. Check condition of hydraulic oil. If the flushing fluid
shows any signs of contamination, or if you are changing
to biodegradable fluid, repeat steps 1 through 14 again.
15. Assume normal operation and follow recom-
mended maintenance intervals.
PUMP INLET HOSE
HYDRAULIC OIL FILTER
Page 4 - - 71
Figure 41
Figure 42
Hydraulic System (Rev. I)