Toro groundsmaster 455-D - Cutting Unit(S) Do Not Lift or Lift too Slowly

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Cutting Unit Does Not Lift or Lift Too Slowly
Cause Correction
Hydraulic oil level too low. Fill to proper level.
Low engine RPM. Adjust engine RPM - use tachometer.
Lift arm or cylinder pivots binding. Lubricate bushings. Inspect for damage. Repair or
repl
ace damaged parts.
Wing deck break-away spring mechanism binding. Lubricate and inspect for damaged or worn parts.
R
epair or replace damaged or worn parts.
Lift cylinder damaged. Check lift cylinder(s). Repair or replace if necessary.
Low counterbalance pressure - TEST NO. 2, 3. Adjust counterbalance pressure or replace
c
ounterbalance relief valve if necessary.
Low lift pressure - TEST NO. 5. Check for restriction in pump intake line or strainer
and
repair if necessary.
Check lift cylinder(s) for internal leakage and repair
or replace if necessary.
Clean relief valve in lift control valve and adjust if
necessary by adding required shims.
Inspect lift valve for internal leakage or improper
operation and repair or replace if necessary.
Inspect steering/lift pump and priority flow valve for
wear or damage and repair or replace if necessary.
Troubleshooting P
age 4 - 16 Groundsmaster
®
455-D