Filtering Closed−Loop Traction Circuit - Toro Groundsmaster 5900 Series Service Manual

Filtering Closed−Loop Traction Circuit
Groundsmaster ® 5900 & 5910
16227SL Rev B
Filtering of a closed−loop hydraulic system after a major traction component
failure (e.g. traction (piston) pump or wheel motor) is a requirement to prevent
debris from transmitting throughout the system. If a closed−loop hydraulic
system filtering tool is not used to ensure system cleanliness, repeat failures,
as well as subsequent damage to other hydraulic components in the affected
system, will occur. To effectively remove contamination from closed−loop traction
circuit, use of the Toro high flow hydraulic filter and hydraulic hose kits are
recommended (see Special Tools (page
1. Park machine on a level surface, lower cutting decks fully, disengage PTO
and stop engine. Remove key from key switch.
2. Raise and support machine so all wheels are off the ground (see
Instructions (page
Note: If wheel motor was replaced, install high flow filter to the inlet of the
new motor instead of to the piston pump hose. This will prevent system
contamination from entering and damaging the new wheel motor.
g287875
1. Piston pump
2. Traction manifold
3. Thoroughly clean junction of hydraulic hose from piston pump and elbow
fitting in the P2 port on side of traction manifold which is attached to the
bottom of the front axle frame
4. Connect Toro high flow hydraulic filter in series between manifold fitting and
disconnected hose. Use hydraulic hose kit (see
to connect filter to machine. Make sure that hose connections are properly
tightened.
5. After installing high flow filter to machine, check and fill hydraulic reservoir
with new hydraulic oil as required (see Operator's Manual).
6. Start engine and run at low idle speed. Check for any hydraulic leakage from
filter and hose connections. Correct any leaks before proceeding.
All wheels will be off the ground and rotating during this procedure.
Make sure machine is well supported so it will not move and
accidentally fall to prevent injuring anyone around machine.
2–15)).
1–6)).
2
Figure 78
3.
(Figure 78). Disconnect hose from elbow fitting.
CAUTION
Page 5–81
1
3
Hose to P2 fitting
Special Tools (page
Hydraulic System: Service and Repairs
Jacking
2–15))