Hustler 602556 Danfoss DDC20 Hydraulic Pump | OEM

Hustler 602556 Danfoss DDC20 Hydraulic Pump | OEM

Product Number: 602556P

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Product Brand: Hustler Parts
Product Type: Parts

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Hustler 602556 OEM Danfoss DDC20 Hydraulic Pump

The Hustler 602556 Hydraulic Pump is a genuine OEM Danfoss DDC20 pump used on select Hustler commercial mower hydrostatic drive systems. This pump is listed as PUMP, DANFOSS DDC20 - HH and is commonly used on compatible Hustler Super Z, Super Z HyperDrive, Super Z HD, ATZ, and related commercial mower applications where Hustler specifies part number 602556.

Hydraulic pumps are a critical part of the mower drive system. They help power the hydrostatic drive and control forward and reverse movement. Replacing a failing pump with the correct OEM part helps restore proper drive response, ground speed, and dependable mower operation.

Always verify your full Hustler model number, serial number, pump location, original pump part number, hydro system diagram, and parts manual before ordering. Hydraulic pump fitment can vary by model, serial range, production year, left-hand/right-hand configuration, and hydro drive layout.

Product Details

Brand Hustler
Part Number 602556
OEM Description Pump, Danfoss DDC20 - HH
Product Type Hydraulic Pump
Pump Type Danfoss DDC20
Common System Hydrostatic drive system
Common Equipment Type Hustler commercial zero-turn mowers
Common Model Families Super Z, Super Z HyperDrive, Super Z HD, ATZ, Super 104
Related Service Part 603362 Seal Kit, Danfoss DDC20
OEM / Aftermarket Genuine OEM Hustler replacement part

Compatible Hustler Model References

Hustler 602556 is listed for many Hustler commercial mower applications using Danfoss DDC20 hydro drive components. Use the references below as a guide only. Always confirm your exact model, serial number, original pump number, and parts manual before ordering.

Click/tap to view major model references
  • Hustler Super Z models produced after serial number prefix 1011 where specified
  • ATZ Parts Manual applications where specified
  • Hustler Super Z HyperDrive models where specified
  • Hustler Super Z HyperDrive EX models where specified
  • Hustler Super Z HD models where specified
  • Hustler Super 104 models where specified
Click/tap to view 60" Super Z HyperDrive model references
  • 60" Super Z HyperDrive Parts Manual 936997 - HTSHDS060BASVANM61A
  • 60" Super Z HyperDrive Parts Manual 937003 - HTSHDS060BASVANM61EFIA
  • 60" Super Z HyperDrive Parts Manual 937003EX - HTSHDS060BASVANM61EFIE
  • 60" Super Z HyperDrive Parts Manual 937060EX - HTSHDS060KAWFX1000VE
  • 60" Super Z HyperDrive Parts Manual 937110 - HTSHDS060KAWFX850VA
  • 60" Super Z HyperDrive Parts Manual 939561 - HTSHDS060BASVANM61EOGA
  • 60" Super Z HyperDrive Parts Manual 939587 - HTSHDS060KAWFX1000VA
  • 60" Super Z HyperDrive Parts Manual 941229 - HTSHDS060BASVANM61A
  • 60" Super Z HyperDrive Parts Manual 941237 - HTSHDS060BASVANM61EFIA
  • 60" Super Z HyperDrive Parts Manual 941294 - HTSHDS060BASVANM61EOGA
  • 60" Super Z HyperDrive Parts Manual 941310 - HTSHDS060KAWFX1000V
  • 60" Super Z HyperDrive Parts Manual 941534 - HTSHDS060KAWFX1000VEFIA
  • 60" Super Z HyperDrive Parts Manual 942219 - HTSHDS060BASVANM61TEFIA
  • 60" Super Z HyperDrive Parts Manual 942227 - HTSHDS060BASVANM61TEOGA
  • 60" Super Z HyperDrive w/Tweels Parts Manual 942359 - HTSHDS060KAWFX1000V
  • 60" Super Z HyperDrive Parts Manual 940551EX - HTSHDS060KAWFX1000VEFIE
  • 60" Super Z HyperDrive Parts Manual 943951 - HTSHDX060KAWFX1000VEFIA
  • 60" Super Z HyperDrive Parts Manual 943969 - HTSHDV060KAWFX1000VA
  • 60" Super Z HyperDrive Parts Manual 943977 - HTSHDV060KAWFX1000VEFIA
  • 60" Super Z HyperDrive Parts Manual 943985 - HTSHDV060BASVANM61TEOGA
  • 60" Super Z HyperDrive Parts Manual 943969EX - HTSHDV060KAWFX1000VE
  • 60" Super Z HyperDrive Parts Manual 943977EX - HTSHDV060KAWFX1000VEFIE
Click/tap to view 60" rear discharge Super Z HyperDrive model references
  • 60" RD Super Z HyperDrive Parts Manual 937011 - HTSHDR060BASVANM61EFIA
  • 60" RD Super Z HyperDrive Parts Manual 937078EX - HTSHDR060KAWFX1000VE
  • 60" RD Super Z HyperDrive Parts Manual 941245 - HTSHDR060BASVANM61EFIA
  • 60" RD Super Z HyperDrive Parts Manual 941559 - HTSHDR060KAWFX1000VA
  • 60" RD Super Z HyperDrive Parts Manual 941336EX - HTSHDR060KAWFX1000VE
  • 60" RD Super Z HyperDrive Parts Manual 944025 - HTSHDR060KAWFX1000VEFIA
  • 60" Super Z HyperDrive RD Parts Manual 944363EX - HTSHDR060KAWFX1000VE
Click/tap to view 66" Super Z HyperDrive model references
  • 66" Super Z HyperDrive Parts Manual 937029 - HTSHDS066BASVANM61EFIA
  • 66" Super Z HyperDrive Parts Manual 937102EX - HTSHDS066KAWFX1000VE
  • 66" Super Z HyperDrive Parts Manual 941252 - HTSHDS066BASVANM61EFIA
  • 66" Super Z HyperDrive Parts Manual 942235 - HTSHDS066BASVANM61TEFIA
Click/tap to view 72" Super Z HyperDrive model references
  • 72" Super Z HyperDrive Parts Manual 937037 - HTSHDS072BASVANM61EFIA
  • 72" Super Z HyperDrive Parts Manual 937037EX - HTSHDS072BASVANM61EFIE
  • 72" Super Z HyperDrive Parts Manual 937045 - HTSHDS072BASVANM61A
  • 72" Super Z HyperDrive Parts Manual 937086EX - HTSHDS072KAWFX1000VE
  • 72" Super Z HyperDrive Parts Manual 939579 - HTSHDS072BASVANM61EOGA
  • 72" Super Z HyperDrive Parts Manual 939595 - HTSHDS072KAWFX1000VA
  • 72" Super Z HyperDrive Parts Manual 941260 - HTSHDS072BASVANM61EFIA
  • 72" Super Z HyperDrive Parts Manual 941278 - HTSHDS072BASVANM61A
  • 72" Super Z HyperDrive Parts Manual 941302 - HTSHDS072BASVANM61EOGA
  • 72" Super Z HyperDrive Parts Manual 941328 - HTSHDS072KAWFX1000VA
  • 72" Super Z HyperDrive Parts Manual 941542 - HTSHDS072KAWFX1000VEFIA
  • 72" Super Z HyperDrive Parts Manual 942243 - HTSHDS072BASVANM61TEFIA
  • 72" Super Z HyperDrive Parts Manual 942250 - HTSHDS072BASVANM61TEOGA
  • 72" Super Z HyperDrive Parts Manual 943993 - HTSHDV072KAWFX1000VA
  • 72" Super Z HyperDrive Parts Manual 944017 - HTSHDV072KAWFX1000VEFIA
  • 72" Super Z HyperDrive Parts Manual 944041 - HTSHDV072BASVANM61TEOGA
  • 72" Super Z HyperDrive Parts Manual 943993EX - HTSHDV072KAWFX1000VE
  • 72" Super Z HyperDrive Parts Manual 944017EX - HTSHDV072KAWFX1000VEFIE
Click/tap to view 72" rear discharge Super Z HyperDrive model references
  • 72" RD Super Z HyperDrive Parts Manual 937052 - HTSHDR072BASVANM61EFIA
  • 72" RD Super Z HyperDrive Parts Manual 941286 - HTSHDR072BASVANM61EFIA
  • 72" RD Super Z HyperDrive Parts Manual 941567 - HTSHDR072KAWFX1000VA
  • 72" RD Super Z HyperDrive Parts Manual 941583EX - HTSHDR072KAWFX1000VE
  • 72" RD Super Z HD Parts Manual 943043 - HTSHDR072KAWFX1000VEFIA
  • 72" RD Super Z HD Parts Manual 943084EX - HTSHDR072KAWFX1000VE
  • 72" Super Z HyperDrive RD Parts Manual 944371EX - HTSHDR072KAWFX1000VE
Click/tap to view Super Z HD model references
  • 60" Super Z HD Parts Manual 942961 - HTSHDX060KAWFX1000VEFIA
  • 60" Super Z HD Parts Manual 942979 - HTSHDV060KAWFX1000VA
  • 60" Super Z HD Parts Manual 942979EX - HTSHDV060KAWFX1000VAE
  • 60" Super Z HD Parts Manual 942995 - HTSHDV060KAWFX1000VEFIA
  • 60" Super Z HD Parts Manual 942995EX - HTSHDV060KAWFX1000VEFIE
  • 66" Super Z HD Parts Manual 943001 - HTSHDV066KAWFX1000VEFIA
  • 72" Super Z HD Parts Manual 943019 - HTSHDV072KAWFX1000VA
  • 72" Super Z HD Parts Manual 943019EX - HTSHDV072KAWFX1000VE
  • 72" Super Z HD Parts Manual 943027 - HTSHDV072KAWFX1000VEFIA
  • 72" Super Z HD Parts Manual 943027EX - HTSHDV072KAWFX1000VEFIE
  • 60" RD Super Z HD Parts Manual 943035 - HTSHDR060KAWFX1000VEFIA
  • 60" RD Super Z HD Parts Manual 943076EX - HTSHDR060KAWFX1000VE
Click/tap to view Super 104 model reference
  • Super 104 Parts Manual 944058EX - HTSWSR104KAWFX1000VEFIE

Important: Hydraulic pump fitment is highly model- and serial-specific. Confirm whether your machine uses Hustler 602556 or another pump, such as 602964, before ordering.

Key Features

  • Genuine OEM Hustler hydraulic pump
  • Part number 602556
  • OEM description: Pump, Danfoss DDC20 - HH
  • Danfoss DDC20 hydraulic pump
  • Used on select Hustler Super Z, Super Z HyperDrive, Super Z HD, ATZ, and Super 104 models where specified
  • Helps restore proper hydrostatic drive operation
  • Factory-correct replacement when listed in your Hustler parts manual
  • Related service part: 603362 Danfoss DDC20 seal kit

Why Choose an OEM Hustler Hydraulic Pump?

A hydraulic pump is one of the most important components in a commercial mower’s drive system. A worn or failing pump can cause weak drive performance, loss of ground speed, uneven tracking, noise, heat, or poor response in forward and reverse.

Genuine Hustler hydraulic pumps are built to match the correct specifications required by compatible Hustler hydro drive systems. When your parts manual lists 602556, using the correct OEM pump helps maintain proper drive performance and reduces guesswork compared to trying to match a pump by appearance alone.

  • Correct fit when specified by Hustler
  • Designed for compatible Danfoss DDC20 hydro systems
  • Helps restore proper drive response and ground speed
  • Supports commercial mowing reliability
  • Recommended for professional repair and heavy-use equipment

When to Replace a Hydraulic Pump

Replace or inspect the hydraulic pump if your mower has drive performance issues, hydraulic noise, excessive heat, leaks, or contamination in the hydraulic system. Always diagnose related components before replacing a pump, including wheel motors, filters, hoses, oil level, linkage, and drive belt condition.

  • Mower has weak or inconsistent drive response
  • One side is slower, weaker, or not tracking correctly
  • Hydraulic pump is leaking or damaged
  • Hydro system is noisy or running hot
  • Hydraulic oil is contaminated with metal or debris
  • Forward or reverse control feels weak
  • Parts manual lists Hustler 602556 for your machine

Important Fitment Notes

  • This is a Danfoss DDC20 hydraulic pump
  • Hydraulic pump fitment may vary by left-hand/right-hand side and hydro layout
  • Some Hustler machines may use different pump numbers by side or serial range
  • Some listings may reference service parts for both 602556 and 602964 hydraulic pumps
  • Verify your original pump number before ordering
  • Do not order by mower model family alone
  • Always use the correct hydraulic oil and service procedure for your mower

Pre-Purchase Checklist

Before ordering Hustler 602556, confirm:

  • Your full Hustler model number
  • Your mower serial number
  • Your original hydraulic pump part number
  • Your pump side or location, if applicable
  • Your hydro system diagram lists 602556 for your exact unit
  • Your fittings, hoses, and control linkage match your current setup
  • Your hydraulic oil, filters, and related components are correct for service

Installation and Service Notes

Hydraulic pump replacement should be performed by a qualified technician or experienced mechanic following the Hustler service manual for the exact machine. Hydraulic systems must be kept clean during service to prevent contamination and premature component failure.

  • Clean the area before disconnecting hydraulic lines
  • Cap or plug open hydraulic lines during service
  • Replace contaminated hydraulic oil and filters as needed
  • Inspect hoses, fittings, wheel motors, and pump drive components
  • Follow the proper fill and purge procedure after installation
  • Check for leaks and verify drive operation before returning the mower to service

Related Service Part

For service work on compatible Danfoss DDC20 pump applications, Hustler also references:

  • 603362 - Seal Kit, Danfoss DDC20

Part Number / Search Terms

Hustler 602556 may also be searched as:

  • Hustler 602556
  • 602556 hydraulic pump
  • Hustler 602556 pump
  • Hustler Danfoss DDC20 pump
  • Danfoss DDC20 HH pump
  • Hustler Super Z hydraulic pump
  • Hustler Super Z HyperDrive hydraulic pump
  • Hustler Super Z HD hydraulic pump
  • Hustler ATZ hydraulic pump
  • Hustler Super 104 hydraulic pump
  • Hustler zero turn hydraulic pump
  • Hustler hydro pump
  • Hustler commercial mower hydraulic pump
  • Hustler 603362 seal kit
  • 602556 602964 hydraulic pump

Frequently Asked Questions

What is Hustler 602556?

Hustler 602556 is a genuine OEM Danfoss DDC20 hydraulic pump used on select Hustler commercial mower hydrostatic drive systems.

What does Danfoss DDC20 mean?

Danfoss DDC20 refers to the hydraulic pump type used in compatible Hustler hydro drive systems. Always match the pump by the Hustler part number and parts manual, not appearance alone.

Does Hustler 602556 fit Super Z HyperDrive models?

Yes, Hustler 602556 is listed for many select Super Z HyperDrive applications where specified in the parts manual. Verify your exact model and serial number before ordering.

Does this fit Super Z HD models?

This pump is listed for select Super Z HD applications where part number 602556 is shown in the parts manual.

Is 603362 the same part as 602556?

No. Hustler 602556 is the hydraulic pump. Hustler 603362 is listed as a Danfoss DDC20 seal kit for service work on compatible pump applications.

How do I know if this pump fits my mower?

Verify your full Hustler model number, serial number, original pump part number, pump side or location, hydro system diagram, and parts manual. Hydraulic pump fitment can vary by model and production range.

Is this an OEM Hustler hydraulic pump?

Yes. This listing is for a genuine OEM Hustler Danfoss DDC20 hydraulic pump.

P&P Small Engines stocks Hustler hydraulic pumps, hydro filters, pump drive belts, seals, mower blades, deck belts, pulleys, spindles, idlers, maintenance parts, and OEM replacement parts to help keep your mower ready to work.

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