Flush Hydraulic System - Toro Greensmaster 3150 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 brake.
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 inlet hose from hydros-
tat, release clamp, and drain reservoir into a suitable
container. Drain hydraulic system while making sure lift
cylinders, hoses, tube lines, and all other components
are drained from low points while the system is warm.
Discard filter (Fig. 26).
3. Clean oil filter mounting area. Remove filter and
drain into a suitable container. Discard filter (Fig. 27).
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 the 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 engine spark plug wires at the
spark plugs.
8. Turn ignition key switch; engage starter for 10 se-
conds to the prime pump. Repeat this step again.
9. Connect both engine spark plug wires to the spark
plugs.
Hydraulic System
10. Start engine and let it idle at low speed for a mini-
mum 2 minutes. Increase engine speed to high idle for
minimum of 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 2 hours under normal oper-
ating 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 – 56
Figure 26
Figure 27
Greensmaster 3150