Scag Power Equipment STT-28CAT manual Checking Hydraulic Oil Level, Changing Hydraulic Oil

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Section 7

7.3 Hydraulic System

A. Checking Hydraulic Oil Level

The hydraulic oil level should be checked after the first 10 hours of operation. Thereafter, check the oil after every 200 hours of machine operation or monthly, whichever occurs first.

- IMPORTANT -

B. Changing Hydraulic Oil

The hydraulic oil should be changed after every 500 hours or annually, whichever occurs first. The oil should also be changed if the color of the fluid has become black or milky. A black color and/or a rancid odor usually indicates possible overheating of the oil, and a milky color usually indicates

water in the hydraulic oil.

- NOTE -

If the oil level is consistently low, check for leaks and correct immediately.

1.Wipe dirt and contaminants from around the reservoir cap. Remove the cap from the hydraulic oil reservoir.

2.Visually check the level of hydraulic oil. Hydraulic oil must be at least 3" inches from top of the filler neck. If the level cannot be determined visually, use a clean tape measure to check the level. If the fluid is low, add 20W50 motor oil. DO NOT overfill; (overfilling the oil reservoir may cause oil seepage around the cap area).

3.Clean the fill cap and install it onto the reservoir.

Hydraulic Oil

Reservoir

The hydraulic oil should be changed if you notice the presence of water or a rancid odor to the hydraulic oil.

1.Park the mower on a level surface and stop the engine.

2.Place a suitable container under the hydraulic oil filter. Remove the fill cap from the reservoir. Remove the hydraulic oil filter. (See Figure 7-3). Allow the fluid to drain into the container and properly discard it.

3.Install a new filter element. See Procedure C.

- NOTE -

Before refilling the hydraulic oil reservoir the hydraulic oil filter should be changed as outlined in Procedure C on the next page.

4.Fill the reservoir to 3" inches from the top of the filler neck with 20W50 motor oil.

5.Replace the reservoir fill cap. Start the engine and drive forward and backward for two minutes. Check the oil level in the reservoir. If necessary, add oil to the reservoir.

2007 STT HOR

Figure 7-2. Hydraulic Oil Reservoir

HYDRAULIC

OIL FILTER

390S0155-1

Figure 7-3. Hydraulic Oil Filter

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Contents OPERATOR’S Manual Remember Your Mower is only AS Safe AS the Operator Table of Contents Limited Warranty Commercial Equipment Inside Back CoverGeneral Information IntroductionDirection Reference Servicing The Engine and Drive TraiN ComponentsSymbols Symbol DescriptionSafety Information Signal WordsBefore Operation considerations Operation Considerations Section Roll-over protection system Foldable Roll-Over Protection SystemSeat Belt Inspection Maintenance Considerations & storage Safety and Instructional Decals Diesel Fuel onlySpecifications Power headEngine ElectricalWeights and Dimensions Cutter DeckHydraulic System SMT61V SMT72VOperating Instructions Controls and Instrument IdentificationSafety Interlock System Dump Valve ControlStarting the Engine Ground Travel and SteeringForward Travel Engaging the Deck Drive Cutter Blades Reverse TravelHillside Operation Parking the MowerAfter Operation Removing Clogged MaterialAdjusting Cutting Height Moving Mower with Engine StoppedRecommendations for Mowing Adjusting the Height Adjust Pedal Adjusting the Steering LeversTowing optional hitch accessory Troubleshooting Cutting Conditions Condition Cause CureTroubleshooting Cutting Conditions Contd Scalping Blades Hitting Adjustments Parking Brake AdjustmentTravel Adjustments Neutral AdjustmentThrottle Control and Choke Adjustments Belt AdjustmentTracking Adjustment Cutter Deck Adjustments Belt AlignmentCutter Deck Level Cutter Deck PitchCutter Deck Height Cutter Deck StopCustom-Cut Baffle Adjustment Custom-Cut Baffle AdjustmentMaintenance Maintenance Chart Recommended Service IntervalsMaintenance Chart Recommended Service Intervals Contd LubricationSection Checking Hydraulic Oil Level Changing Hydraulic OilEngine Oil Engine Fuel SystemBattery Engine Air CleanerCleaning and/or Replacing Air Cleaner Element Replacing In-Line Fuel Filter ElementsCharging the Battery Drive BeltsCutter Blades Blade InspectionBlade Replacement TiresBlade Sharpening Cutter Deck Gearbox Cooling SystemChecking Lubricant Level Changing LubricantCleaning the Radiator Debris Screen BODY, DECK, and UpholsteryChecking The Fan Belt Tension Illustrated Parts List Scag Approved Attachments and AccessoriesSection 61V & 72V Cutter Deck Description Cutter Deck Controls 481764 Link, Deck Lift Sheet Metal Components Sheet Metal Components Section STT ROLL-OVER Protection System with Suspension Seat 9292 Deck Drive Components Deck Drive Components Section Engine & Attaching Parts 28HP Cat diesel Section Engine & Attaching Parts 28HP Cat Diesel Section Radiator & Attaching Parts 28HP Cat Diesel Radiator & Attaching Parts 28HP Cat Diesel Brake and Steering Components Brake and Steering Components Section Fuel and Hydraulic System 28HP Cat Diesel Section Fuel and Hydraulic System 28HP Cat Diesel Section BDP-16A Hydraulic Pump Assembly with Cooling Fan Hex Screw, Flanged Head M10 x 1.50-65mm Section Electrical System 28HP Cat Diesel Electrical System 28HP Cat Diesel Heavy-Duty Commercial Sttkbd Decals Page2 Section Electrical Schematic 28HP Cat Diesel Limited Warranty Commercial Equipment
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