Hydraulic System Maintenance; Replacing The Hydraulic Filter; Changing The Hydraulic Fluid - Toro 22322 Operator's Manual

Hydraulic System
Maintenance

Replacing the Hydraulic Filter

Service Interval: After the first 8 hours
Every 200 hours
Important: Do not substitute an automotive oil filter or
severe hydraulic system damage may result.
1. Position traction unit on a level surface.
2. Lower the loader arms, shut off the engine, and remove
the key.
3. Open the rear-access cover.
4. Place a drain pan under the filter
Figure 58
1. Hydraulic filter
5. Remove the old filter
of the filter adapter gasket clean.
6. Apply a thin coat hydraulic fluid to the rubber gasket
on the replacement filter.
7. Install the replacement hydraulic filter onto the filter
adapter (Figure 58). Tighten it clockwise until the
rubber gasket contacts the filter adapter, then tighten
the filter an additional 3/4 turn.
8. Clean up any spilled fluid.
9. Start the engine and let it run for about 2 minutes to
purge air from the system.
10. Shut off the engine and check for leaks.
(Figure 58).
(Figure 58) and wipe the surface
WARNING
Hydraulic fluid escaping under pressure can
penetrate skin and cause injury. Fluid injected
into the skin must be surgically removed
within a few hours by a doctor familiar with
this form of injury; otherwise, gangrene may
result.
• Keep your body and hands away from
pinhole leaks or nozzles that eject
high-pressure hydraulic fluid.
• Use cardboard or paper to find hydraulic
leaks; never use your hands.
11. Check the fluid level in the hydraulic tank (refer to
Checking the Hydraulic-Fluid Level (page
fluid to raise the level to mark on dipstick. Do not
overfill the tank.
12. Close the rear-access cover.

Changing the Hydraulic Fluid

Service Interval: Every 400 hours/Yearly (whichever comes
first)
Hydraulic Fluid Specification:
Use only 1 of the following fluids in the hydraulic system:
•
Toro Premium Transmission/Hydraulic Tractor
Fluid (refer to your Authorized Toro Dealer for more
information)
•
Toro Premium All Season Hydraulic Fluid (refer to
your Authorized Toro Dealer for more information)
•
If either of the above Toro fluids are not available,
you may use another Universal Tractor Hydraulic
Fluid (UTHF), but they must be only conventional,
petrolium-based products. The specifications must fall
within the listed range for all of the following material
properties and the fluid should meet the listed industry
standards. Check with your oil supplier to determine if
the oil meets these specifications.
Note: Toro does not assume responsibility for damage
caused by improper substitutions, so use only products
from reputable manufacturers who stand behind their
recommendations.
Material Properties
Viscosity, ASTM D445
Viscosity index, ASTM D2270
Pour Point, ASTM D97
41
18)) and add
cSt at 40 degrees C: 55 to 62
cSt at 100 degrees C: 9.1 to
9.8
140 to 152
-37 to -43 degrees C (-35 to
-46 degrees F)