Toro Groundsmaster 4100-D Service Manual

Also see for 30447: Operator's manual Installation instructions Installation instructions

Contents

Groundsmaster 4100--D/4110--D Hydraulic SystemPage 4 -- 63Procedure for Lift/Lower Circuit Relief PressureTestNOTE: Before attempting to check or adjust lift/lowercircuit relief pressure, make sure that counterbalancepressure is correctly adjusted (see CounterbalancePressure Test in this section).1. Make sure hydraulic oil is at normal operating tem-perature by operating the machine under load forapproximately ten (10) minutes. Make sure the hydrau-lic tank is full.2. Park machine on a level surface with the cutting decklowered and off. Make sure engine is off and the parkingbrake is engaged.3. Remove controller cover to gain access to lift/lowermanifold (Fig. 45).CAUTIONPrevent personal injury and/or damage to equip-ment. Read all WARNINGS, CAUTIONS and Pre-cautions for Hydraulic Testing at the beginningof this section.4. Connect a 5,000 PSI (345 bar) pressure gauge totest port G1 on lift/lower manifold (Fig. 46).5. After installing pressure gauge, start engine and runat idle speed. Check for hydraulic leakage at pressuregauge location and correct before proceeding with test.6. Sit on the seat and move throttle so engine is runningat high idle speed (2870 RPM).7. While sitting on the seat, depress the rear of the cen-ter lift switch to fully raise the cutting deck. Momentarilyhold the switch with the deck fully raised while lookingat the gauge.GAUGE READING TO BE approximately 2500 PSI(172 bar).8. Release the lift switch, stop the engine and recordtest results.9. If specification is not met, clean or adjust relief valve(RV1) in lift/lower control manifold. Relief valve (RV1) islocated on the top side of the lift/lower manifold (Fig. 46).See Adjust Control Manifold Relief Valves in the Adjust-ments section of this chapter for the valve adjustmentprocedure. Recheck relief valve pressure setting afteradjustment.10.If relief valve adjustment does not change relief pres-sure, check for restriction in pump intake line, lift cylin-der(s) internal leakage or gear pump damage.11. When testing is completed, disconnect pressuregauge from test port. Install controller cover.1. Controller cover2. Screw (2 used)3. Flat washer (2 used)4. U--nut (2 used)Figure 45FRONTRIGHT 23141. Lift/lower manifold2. Test port G13. Relief valve RV1Figure 46123HydraulicSystem