Textron Jacobsen SLF530 User Manual

HYDROSTATIC POWER TRAIN
673831-Rev A 5-21
5
Hydrostatic System Operating Hot
Excessive Traction Pump Noise
4WD Will Not Engage
4WD Will Not Disengage
Probable Cause Remedy
Hydraulic oil not at correct level in reservoir. Fill reservoir to correct level. (Refer to “Safety, Operation, and
Maintenance Manual” for the correct oil specifications.)
Bypass valve open. Close bypass valve. (Refer to “Safety, Operation, and
Maintenance Manual.”)
Loop flushing valve worn or damaged. Repair or replace loop flushing valve as needed. (See “Traction
Pump” on page 5-40.)
Incorrect charge pressure relief setting. Test charge pressure relief valve setting. (See “Charge Pressure
Test” on page 5-25.) Repair or replace charge pressure relief
valve as needed. (See “Traction Pump” on page 5-40.)
Slippage in pump or motor. Perform instrument tests. (See “Instrument Test Overview” on
page 5-25.)
Faulty relief valve. Test and repair. (See “Traction Pump Tests” on page 5-29.)
Probable Cause Remedy
Hydraulic oil not at correct level in reservoir. Fill reservoir to correct level. (Refer to “Safety, Operation, and
Maintenance Manual” for the correct oil specifications.)
Hydraulic oil cold. Warm hydraulic oil to operating temperature.
Air in hydraulic system (air bubbles in hydraulic oil). Check suction line for air leaks. Repair as needed. Operate
various hydraulic systems until hydraulic system is free of air.
Traction pump worn or damaged. Repair or replace pump as needed. (See “Traction Pump” on
page 5-40.)
Probable Cause Remedy
4WD solenoid in 4wd valve does not engage when 4WD is
activated on the LDU.
Problem in electrical circuit. (See Electrical section,
Troubleshooting—“Instrumentation Circuit Schematic” on
page 4-42.)
4WD solenoid in 4WD valve assembly sticking. Repair or replace 4WD solenoid valve. (See “4WD Valve” on
page 5-45.)
Low charge pressure. Test charge pump. (See “Charge Pressure Test” on page 5-25.)
Forward switch faulty or out of adjustment Test or replace forward switch. (See “Forward Switch Adjustment”
on page 5-23.)
Probable Cause Remedy
4WD solenoid in 4WD valve assembly sticking. Repair or replace 4WD solenoid valve. (See “4WD Valve” on
page 5-45.)
Forward switch faulty or out of adjustment Test or replace forward switch. (See “Forward Switch Adjustment”
on page 5-23.)

Textron Jacobsen SLF530 Specifications

General

Brand	Textron
Model	Jacobsen SLF530
Category	Lawn Mower
Language	English