Textron JACOBSEN R-311 69166, Техническое руководство по ремонту

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CUTTING UNITS
4203781 First Edition 8-7
8
Troubleshooting
Mechanical Troubleshooting
Condition Probable Cause Remedy
Drive motors do not reach full speed. Engine speed is insufficient, not set to
specification. Check engine speed. (Refer to “Safety,
Operation, and Maintenance Manual.”)
Rotary drive motors and/or hydraulic
system performance is reduced. Check hydraulic system performance.
(See “Instrument Test Procedure” on
page 6-27.)
Drive motors do not engage. Operator not in seat. Operator must be in seat before engaging
mower.
Seat switch is faulty. Test seat switch. (See “Seat Switch Test”
on page 4-77.)
PTO switch is not engaged. Engage PTO switch. (Refer to “Safety,
Operation, and Maintenance Manual.”)
PTO switch is faulty. Test PTO switch. (See “PTO Switch Test”
on page 4-78.)
Wing mow enable switch not engaged. Engage wing mow enable switch. (Refer to
“Safety, Operation, and Maintenance
Manual.”)
Wing mow enable switch is faulty. Test wing mow enable switch. (See “Wing
Mow Enable and Light Switches Test”
on page 4-79.)
Front mow enable switch not engaged. Engage front mow enable switch. (Refer to
“Safety, Operation, and Maintenance
Manual.”)
Front mow enable switch is faulty. Test front mow enable switch. (See “Front
Mow Enable Switch Test” on
page 4-79.)
Front, right, or left mow solenoid is faulty. Test mow solenoids. (See “Solenoids Test”
on page 4-83.) (See “Mow Circuit
Schematic” on page 4-38.)
Right or left wing proximity switch is faulty. Test right and left wing proximity switches.
(See “Mow Circuit” on page 4-64.)
Front limit switch is faulty. Test front limit switch. (See “Front Limit
Switch Test” on page 4-78.)
Low hydraulic oil level. Check hydraulic oil level.
Park brake is on or park brake switch is
faulty. Test park brake switch. (See “Micro
Switches Test” on page 4-82.)
Engine overheats. Check engine cooling system and coolant
level.
Hydraulic oil filter restriction. Test hydraulic oil pressure switch. (See
“Instrumentation Circuit Schematic” on
page 4-56.)
Cutting unit does not lower completely to
ground. Cutting unit movement is restricted. Check/remove cutting unit restriction.
Weight transfer knob is out of adjustment. Adjust weight transfer knob. (Refer to
“Safety, Operation, and Maintenance
Manual.”)
Raise/lower circuit is faulty. Test raise/lower circuit. (See “Run Circuit
Schematic—Off Seat” on page 4-32.)
Cutting unit does not rise off ground. Engine rpm too slow. Increase engine rpm.
Hydraulic system performance is reduced. Check hydraulic system performance.
(See “Instrument Test Procedure” on
page 6-27.)