Great Dane GDRZ72-27KHE Using Hydraulic Pump Free-Wheel Valves, Transporting Machine, Mowing Tips

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OPERATING

Using Hydraulic Pump Free-Wheel Valves

c CAUTION: Avoid injury! With the free-wheel valves open, the machine will have unrestricted motion.

The machine may free-wheel out of control if the free-wheel valves are opened with the machine on an incline.

Park the machine on a level surface before opening the free-wheel valves.

IMPORTANT: Avoid damage! Transmission damage may occur if the machine is moved or towed incorrectly:

Move unit by hand only.

Do not use another vehicle to move unit.

Do not tow unit.

NOTE: The hydraulic pump free-wheel valves must be fully turned clockwise (closed) during normal vehicle operation.

When the machine needs to be moved without starting or running the engine, use the hydraulic pump free-wheel valves:

1. Lock the park brake.

NOTE: The pumps are located under the machine, behind the mower deck.

clockwise (closed position). Tighten valve to 9-14 N•m (80- 120 lb-in.).

6. Lock the park brake.

Transporting Machine

c CAUTION: Avoid injury! Use caution when loading or unloading machine into a trailer or truck.

IMPORTANT: Avoid damage! Transmission damage may occur if the machine is moved or towed incorrectly:

Move unit by hand only.

Do not use another vehicle to move unit.

Do not tow unit.

Use a heavy-duty trailer to transport your machine. Trailer must have signs and lights required by law.

1.Raise the mower deck lift lever to the transport position.

2.Drive machine on trailer.

3.Stop engine and lock the park brake.

4.Remove key.

5.Fasten machine to trailer with heavy-duty straps, chains or cables. Both front and rear straps must be directed down and outward from machine.

A

MX13120

Picture Note: Left pump shown.

2.Turn free-wheel valve (A) on both pumps one full turn counterclockwise (open position).

3.Unlock the park brake.

4.Push machine to desired location. Due to hydraulic system drag, machine will move slowly.

5.Turn free-wheel valve (A) on both pumps one full turn

Mowing Tips

Mow grass with throttle lever in the full-throttle position.

Cut grass when it is dry.

Keep mower deck and discharge chute clean.

Mow with sharp blades.

Properly level mower deck for a smooth cut.

Mow grass high and often.

Use a travel speed that fits the conditions:

Mow tall or wet grass twice. Cut grass at half desired height; then cut at desired height.

Travel slow when mowing tall, thick or wet grass.

Avoid damaging grass by slipping or skidding machine drive wheels. Practice smooth control lever movements.

When performing sharp turns, do not allow inside machine drive wheel to stop and twist on grass.

Operating - 20

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Contents OPERATOR’S Manual Using Your Operator’s Manual IntroductionSpecial Messages Product Identification Record Identification NumbersTable of Contents Safety Understanding The Machine Safety LabelsM131748, MX15340 Emission Control System Certification Label Emission Compliance PeriodCertification Canadian Electromagnetic Compatibility EMC ComplianceOperator Training Required Operating SafelyUsing a Spark Arrestor Checking Mowing AreaParking Safely Rotating Blades are DangerousKeep Riders Off Avoid TippingChecking Wheel Bolts Practice Safe Maintenance Wear Appropriate ClothingDriving Safely on Public Roads Tire Safety Avoid High-Pressure FluidsPrevent Fires Handling Fuel Safely Handling Waste Products and ChemicalsFuel and fuel vapors are highly flammable Daily Operating Checklist Testing Safety SystemsOperating Operator Station ControlsTesting PTO Switch Testing Park Brake SwitchTesting Neutral Start Switch Testing Seat SwitchAdjusting Seat Adjusting Mower Deck Cutting HeightMounting and Dismounting Machine Safely Raising and Lowering Operator SeatAdjusting Mower Deck Anti-Scalp Wheels Using the Park BrakeUsing the Key Switch Using the PTOUnlocking Park Brake Engage PTOUsing the Throttle Lever Using the HourmeterUsing the Choke Carbureted Engines Only Using the Motion Control LeversNeutral Lock Position Optional Over the Lap Levers Forward Gentle Right Turn ReverseGentle Left Turn Sharp Left TurnStarting the Engine Engaging Mower Stopping the EngineUsing Hydraulic Pump Free-Wheel Valves Transporting MachineMowing Tips Picture Note Left pump shownMowing Travel Speeds Dismounting to Inspect MowerAvoid Damage to Plastic and Painted Surfaces Replacement Parts PartsPart Numbers Service Intervals Service Lubrication GreaseSpray Lubricant Lubrication PointsPicture Note 48-, 52- and 61-inch mower decks Picture Note 72-inch mower deckService Engine Checking and Cleaning Air Filter Elements Cleaning Engine Air Intake Screen and FanCleaning Engine Oil Cooler Kohler Engines Oil Capacity With Filter DryChecking Spark Plug Adjusting Carburetor Carbureted Engines Replacing Fuel Filter Carbureted EnginesReplacing Fuel Filter Fuel Injected Engines Picture Note Kawasaki engine shownTroubleshooting the Kohler Electronic Fuel Injection System Priming Fuel Injectors Fuel Injected EnginesService Engine Service Transmission Hydraulic OilChecking Hydraulic Oil Level Changing Hydraulic Oil and FilterRemoving and Installing Traction Drive Belt Cleaning Hydraulic Pump Cooling FinsChecking and Adjusting Motion Control Linkages Neutral Creep AdjustmentCheck Maximum Speed Drift Maximum Speed Drift Adjustment Hydraulic System Hose Routing Hydraulic System Schematic Cooling OrificeService Steering & Brakes Remove and Install Front Caster WheelsServicing Front Caster Wheel Roller Bearings Chariot Servicing Front Caster Wheel Roller Bearings Chariot LXAdjusting Front Caster Spindle Bearing Servicing Caster Spindle BearingsHeight Adjustment Procedure Check AlignmentAdjusting Park Brake Alignment ProcedureService Mower Removing and Installing Mower Deck Foot PlateRemoving and Installing Mower Deck Belt Shields Adjusting Level Side-to-Side Leveling Mower DeckChecking Level Side-to-Side Picture Note Discharge chute raised for photo clarityChecking and Adjusting Cutting Height Adjust Thrust Arm-to-Stop Rod Clearance Transport PositionAdjusting Deck Lift Assist Spring Tension Adjust Assist Spring TensionCheck Spring Tension MX15328 MX15318 Checking and Replacing Mower Blades Sharpening Blades Balancing BladesReplacing Mower Blades Replacing Mower Spindle Bearings 72-Inch Mower Deck Service Mower Service Electrical Removing and Installing the BatteryCleaning Battery and Terminals Using Booster Battery Booster Battery Disabled Vehicle BatteryReplacing Fuse Carbureted Engines Replacing Fuses Fuel Injected EnginesBurnishing the PTO Clutch Wiring Schematic Carbureted Engines Wiring Schematic 26 HP Fuel Injected Engine Wiring Schematic 28 HP Fuel Injected Engine Service Miscellaneous Filling Fuel TankChecking Tire Pressure Tire Size PressureRemove and Install Rear Drive Wheels Cleaning and Repairing Metal SurfacesTroubleshooting Using Troubleshooting ChartCheck Troubleshooting Electrical System Machine Park BrakeSteering Mower Deck Storing Safety StoragePreparing Machine for Storage Preparing Fuel and Engine for StorageAssembly Install Motion Control Levers Install SeatCheck Safety System Lubricate MachineInitial Adjustments Specifications Height Adjustment Increments mm 1/2 Belt Shields, Removing and Installing Mower Deck IndexSpindle Bearings, Replace, 48-, 52- and 61-In. Decks Service Record GD Record Service Dates

GDRZ48-19KAE, GDRZ61-25KHE, GDRZ61-27KHE, GDRZ48-17KAE, GDRZ72-28KHE specifications

The Great Dane GDRZ series, including models GDRZ72-27KHE, GDRZ61-25KAE, GDRZ61-28KHE, GDRZ61-26KHE, and GDRZ52-25KHE, stands out as a robust line of refrigerated trailers designed for the rigorous demands of commercial transport and logistics. These models embody a perfect fusion of innovative technologies, exceptional performance, and high durability, catering specifically to the needs of operators in the freight industry.

One of the most notable features of the GDRZ series is its advanced insulation technology, which significantly enhances temperature retention. This is vital for businesses that rely on the transport of perishable products, ensuring that goods remain fresh throughout the journey. The GDRZ trailers utilize high-density foam insulation, providing superior thermal performance while minimizing energy costs.

In terms of structural integrity, the GDRZ series is built with a sturdy composite construction that enhances durability while reducing overall weight. This lightweight design contributes to improved fuel efficiency, allowing operators to maximize their payload without compromising on safety or performance. Moreover, these trailers are equipped with corrosion-resistant materials, extending their lifespan and reducing maintenance costs.

The cooling systems in the GDRZ models are engineered for optimal performance. High-efficiency refrigeration units with digital thermostatic controls ensure that temperature settings are maintained accurately and can be adjusted easily. This technology enables users to monitor and record temperature data, facilitating compliance with industry regulations and providing peace of mind regarding cargo safety.

Another highlight of the GDRZ series is its user-friendly features. The ergonomic design of the interior allows for easy access to cargo, while the integrated lighting solutions facilitate loading and unloading in low-visibility conditions. The models also feature reinforced tie-down points that secure cargo effectively, reducing the risk of movement and damage during transit.

Safety is a key consideration across the GDRZ line, with advanced braking systems and reflective markings enhancing visibility and control on the road. Additional safety features may include optional GPS tracking systems, allowing operators to monitor the whereabouts of their trailers in real time, ensuring timely deliveries and improved fleet management.

In summary, the Great Dane GDRZ series, with its various models, represents a significant advancement in refrigerated transport technology. Combining energy efficiency, durability, and user-centric design, these trailers are ideal for businesses seeking reliable solutions for their refrigerated transport needs. With a commitment to quality and innovation, Great Dane continues to set industry standards for excellence in trailer manufacturing.