Filtering The Closed-Loop Traction Circuit - Toro ProLine H800 Service Manual

Filtering the Closed-Loop Traction Circuit

Hydraulic System: Service and Repairs
Filtering a closed-loop hydraulic system after a major component failure (e.g.,
hydraulic pump or hydraulic motor) is necessary to prevent unwanted material
from transmitting throughout the system. If a closed-loop hydraulic system
filtering tool is not used to ensure the system cleanliness, repeat failures, as well
as subsequent damage to other hydraulic components in the affected system
will occur. To effectively remove the contamination from the closed-loop circuit,
use the Toro high flow hydraulic filter and hydraulic hose kits (refer to
Tools (page 2–15)).
1. Park the machine on a level surface, shut of the engine, and remove the key
from the key switch.
Note: Before lifting the machine with a jack, review and follow the
Instructions (page
2. Lift and support the machine so that all 4 wheels are off the ground.
Note: If the hydraulic motor was replaced, install a high-flow filter to the inlet
of the new motor instead of to the hydraulic pump fitting. This will prevent
system contamination from entering and damaging the new hydraulic motor.
g293136
1. Hydraulic pump
2. O-ring
3. Fitting
4. Right T fitting
3. Clean the junction of the hydraulic hose and left T fitting (item 8 in
62) at the bottom of the hydraulic pump. Disconnect the left T fitting from
the hydraulic pump.
4. Connect the Toro high flow hydraulic filter in series between the hydraulic
pump and the left T fitting. Use the hydraulic hose kit (refer to
(page 2–15)) to connect the filter to the machine. Ensure that the fitting and
hose connections are properly tightened.
Using other hydraulic fluids could damage the hydraulic system.
Use the hydraulic fluids that are specified in the Operator's Manual.
1–7).
Figure 62
5. Hydraulic hose (reverse)
6. Hydraulic hose (forward)
7. Plug
8. Left T fitting
IMPORTANT
Page 5–68
Special
Jacking
Figure
Special Tools
ProLine H800
19241SL Rev A