21
430
MAX
MAINTENANCE
HYDRAULIC SYSTEM
NOTE:
THE USE OF ANY OIL OTHER THAN Schiller
Grounds Care, Inc. TRANS-HYDRAULIC OIL
OR TRC 6440 UNIVERSAL TORQUE FLUID IS
NOT RECOMMENDED. IF A SUBSTITUTE OIL
CAUSES OR SUBSTANTIALLY CONTRIBUTES
TO A FAILURE, THAT FAILURE MAY NOT BE
COVERED BY WARRANTY.
1. Keep system filled with proper fluid.
- Check daily at both transaxle dipsticks.
- Check when oil is cold.
- Use only clean containers. Keep it clean!
2. Keep oil and filter changed.
- Initial filter change 25 hours, then oil and
filter change at 50 hours.
- Change oil and filter every 250 hours thereafter
or annually. (whichever occurs first)
- Change oil when warm (not hot).
- Make sure filter is primed.
- Use only O.E.M. filter and Schiller Grounds
Care, Inc. fluid or
TRC
6440.
- Check oil level after 30 minutes of operation.
- Do not over tighten drain plug.
- Make sure filter is tight.
- Change hydraulic oil and filter at the first sign
of abnormal hydraulic functions.
3. Check for leaks daily (Never operate a unit if a
leak is detected).
- Inspect hoses for leaks or chafing.
- Inspect fittings and hose ends for seepage.
4. Keep tractor/unit clean.
- Keep auxiliary hoses and couplers clean and
plugged.
- Grass and debris will hold in heat.
- A clean unit is easier to work on and safer to
operate. And it is easier to do regular checks.
- See your dealer for a high pressure filter of the
entire system if drive system has been opened
(such as hoses removed, pump or motors
removed).
TRANSAXLE OIL CHANGE PROCEDURE
Change oil and filter at any time contamination is
suspected. Approximately 3 gallons of approved
hydraulic oil are needed to change oil.
1. It is best to drain transaxles after the tractor has
been thoroughly warm to assure maximum drain.
2. Remove fill neck cap from rear transaxle.
3. Remove drain plug from rear transaxle.
4. Open the front transaxle vent.
5. Remove drain plug from front transaxle. After
approximately 1 quart of hydraulic oil has been
drained from the front transaxle, remove the fill
tube cap.
6. Remove hydraulic oil filter and wipe filter base
clean.
7. Fill the new O.E.M. hydraulic filter with hydraulic
oil and lube the filter gasket.
8. Install the new hydraulic oil filter. Tighten 3/4 to
1 turn after gasket makes contact with the filter
base. Do not overtighten.
9. Install drain plugs in both transaxles.
10. Fill front transaxle to the top of the fill tube,
approximately 6 quarts.
11. Close the front transaxle vent.
12. Fill the rear transaxle to the top of the fill neck.
13. Run engine, and turn steering wheel extreme
right to extreme left several times to purge all air
from the circuit.
14. Drive the unit back and forth about 50 feet to
purge air from the drive circuit.
15. Repeat step 12 as needed.
