Toro Reelmaster 335-D Service Manual page 101

Cutting Units Will Not Drop or Follow Ground Contours
Cause
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Low engine RPM.
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Lift arm or cylinder pivots binding.
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Lift cylinder damaged.
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Counterbalance pressure to high - TEST NO. 2.
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Cylinder port orifice plugged.
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Worn or damaged spool detent in lift valve.
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Faulty lift valve.
Cutting Unit(s) Drop From Raised Position With Lift Valve in Centered Position
Cause
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Internal leakage of lift cylinder(s)
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Lift cylinder hydraulic lines or fittings leaking.
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Faulty lift valve lockout assembly.
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Reelmaster 335-D
Correction
Adjust engine rpm - use tachometer.
Lubricate bushings. Inspect for damage. Repair or re­
place damaged parts.
Check lift cylinder(s) and repair or replace if neces­
sary.
Adjust counterbalance pressure or replace counter­
balance relief valve if necessary.
Clean orifice.
Repair or replace.
Repair or replace lift valve.
Correction
Check lift cylinder(s) and repair or replace if neces­
sary.
Check for leaks. Correct any leaks by replacing o­
rings and tightening connection properly. Replace
lines or fittings if necessary.
Check for damaged o-rings on lockout plugs or seats
and repair if necessary.
Check for damaged or worn lockout poppet assembly
and replace if necessary.
Check for broken lockout spring and replace if neces­
sary.
Page 4 - 21 Troubleshooting