Need the factory part numbers for your Walker MDD or MDG Rider Lawnmower? This 67-page illustrated parts catalog (OEM #7000-2) maps every component on both the 20.9 HP Diesel and 24.5 HP Gasoline models. Coverage includes exploded-view diagrams for body and chassis assemblies, the full engine group broken out separately for MDD and MDG, hydrostatic ground drive assemblies, GHS Powerfil system components, and wiring schematics for both models. Special options get their own section, covering the Power Dump Kit, Power Deck Lift Kit, Armrest Kit, and Tail Wheel Lock Kit, so you can order the right part for your exact configuration. Hydrostatic drive units are listed with OEM part numbers by rotation: 700-031 for the CW unit, 700-032 for the CCW, exactly as Walker specced them. Bookmark straight to your assembly and have the part number ready before you call the dealer.
What's Inside This Walker MDD, MDG Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Decals | 3-4 | Tractor Decals, Walker Product Decals, Danger Decals Warning Decals Caution Decals, Maintenance Decals, Option Decals |
| Body / Chassis Assemblies | 5-10 | Body / Chassis Assembly (GHS Models), Rear Body Assembly (GHS Models), Body Assembly (SD Models) |
| Tractor Components | 11-48 | Main Component Power Transmission (GHS Models, SD Models), Engine Group (MDD Models, MDG Models), Air Intake & Exhaust Group, Radiator Group, Hydrostatic Ground Drive Assemblies |
| Special Options | 49-60 | Light Kit, Armrest Kit & Walker Touch-Up Paint, Power Dump Kit (Bushel GHS Models Only), Power Deck Lift Kit, Tail Wheel Lock Kit |
| Maintenance | 61-64 | Lubrication Points, Ignition Switch Circuits, Relay-A Fuel Solenoid Start Relay, Relay-B Warning Relay, Relay-C Fuel Solenoid Run Relay, Fan Speed Control, Relay-A Start Relay |
| Operator's Notes | 65 | - |
| Warranty | 66-67 | Limited Warranty For Walker Commercial Rider Mower, What This Warranty Covers, And For How Long, What This Warranty Does Not Cover, How To Obtain Service Under This Warranty |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Ground Drive Belt, Micro-V replacement | 1 required | p. 11 |
| Blower Belt (3VX280) replacement | 1 required | p. 31 |
| Hydrostatic Drive, CCW (700-032) replacement | 1 required | p. 23 |
| Hydrostatic Drive, CW (700-031) replacement | 1 required | p. 23 |
| O-Ring Seal replacement | 2 required | p. 23 |
| Hydrostatic Drive lubrication type | Oil (refer to Owner's Manual for procedure) | p. 61 |
| Clutch Idler Pulley replacement | 1 required | p. 11 |
| Idler Pulley (3") replacement | 2 required | p. 11 |
| Blade Drive Gearbox lubrication | Oil (2 places, permanently lubricated and sealed) | p. 61 |
| Tee Gearbox, Deck lubrication | Oil (1 place, permanently lubricated and sealed) | p. 61 |
| Air Cleaner replacement | 1 required | p. 19 |
| Air Filter Element (70000-11221 Kubota) replacement | 1 required | p. 19 |
Walker MDD, MDG Common Problems This Manual Covers
Walker MDD MDG hydrostatic drive unit part number unclear, need correct CCW vs CW replacement unit p. 23
Open the Hydrostatic Ground Drive Assemblies exploded view on page 23. The CCW unit is listed as part #700-032 and the CW unit as part #700-031, one of each required per machine. Verify which side is failed before ordering: the two units are not interchangeable. Also confirm the 2 O-ring seals are on your order, as they are listed separately on page 23.
Manual Section: Tractor ComponentsGround drive belt part number needed, unsure which Micro-V belt fits the drivetrain p. 13
Check the Main Component Power Transmission exploded view starting on page 11. The Ground Drive Belt, Micro-V is listed as a single required replacement item on page 13. Cross-reference the Clutch Idler Pulley, the two 3-inch Idler Pulleys, and the Transmission Drive Pulley (3-1/4 / A) on page 11 to verify all related wear parts while the belt is off.
Manual Section: Tractor ComponentsFuel filter part number uncertain, two Kubota filter numbers listed in catalog for diesel engine p. 15
Turn to page 15 for MDD fuel system parts. Two Kubota fuel filters appear: part #19204-43010 and #15231-43560, plus a separate In-Line Fuel Filter, all listed as individual replacements. Confirm your serial number range against the parts list to identify which filter applies to your specific build. MDG owners use the In-Line Fuel Filter listed on page 17 instead.
Manual Section: Tractor ComponentsAir filter element part number needed, unsure if Walker part or Kubota OEM cross-reference applies p. 19
Go to page 19 for the Air Intake group. The Air Cleaner assembly and the Air Filter Element (Kubota part #70000-11221) are both listed as separate line items, each required as 1 unit. Order both if replacing the full assembly, or just the element for a routine service swap. The lubrication points chart on page 61 shows an 8-hour service interval as a general maintenance reference.
Manual Section: Tractor ComponentsSpindle bearing and deck pulley parts hard to identify without correct exploded view page p. 11
Navigate to the Tractor Components section beginning on page 11 for the full drivetrain and pulley parts list. The PTO Drive Pulley (4-1/2 / 3V), Engine Pulley (Flywheel Mount), Jackshaft Drive Pulley (3/4 / 3V), and both 3-inch Idler Pulleys are all itemized there. For the blower-side pulleys, the Blower Drive Pulley (4-1/4 / 3V), Blower Pulley (3-3/8 / 3V), and Idler Pulley (1/2 Groove) are on page 31 alongside the Blower Belt (3VX280).
Manual Section: Tractor ComponentsWiring diagram needed to identify correct fuse and circuit breaker part numbers for electrical fault p. 62
Find the wiring schematics on page 62. For electrical specs: the 12V battery and MDD 40-amp main circuit breaker are referenced on page 43; the MDG uses a 30-amp main circuit breaker shown on page 45. Both models share a 10-amp instrument panel circuit breaker and a 20-amp instrument panel fuse. Confirm your model before ordering: MDD and MDG circuit breaker ratings are different and parts are not cross-compatible.
Manual Section: MaintenanceFrequently Asked Questions
What are the replacement specifications for Deck belt?
The Engine PTO Belt (AX44) is listed under part number 7230, used in the PTO Drive Shaft Assembly. It carries power transmission to the deck.
What are the replacement specifications for Hydrostatic unit / hydro pump?
Both hydrostatic drive units are identified by part number. The CCW (Counter-Clockwise) unit is P/N 5025 (700-032); the CW (Clockwise) unit is P/N 5026 (700-031).
How will I receive this Walker MDD, MDG Parts Catalog?
A 67-page Parts Catalog in searchable PDF, available the moment checkout completes. View it on computer, tablet, or phone, with no shipping wait.
Am I able to print pages from this Walker MDD, MDG manual?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
Does this Walker MDD, MDG Parts Catalog have electrical diagrams?
Yes, this Walker MDD, MDG Parts Catalog includes complete electrical wiring diagrams, wire routing, and connector pinouts.
Document Quality
This document is a scanned PDF, but it includes an OCR layer, allowing you to search and copy the full text content. The text throughout the manual is crisp and consistently easy to read, with no blurriness or fading. All diagrams and illustrations are clear black and white raster images, and their labels are sharp and perfectly legible. The pages are clean, free from scan artifacts, stains, or skewed content, ensuring a professional appearance. You will find a dedicated "Operator's Notes" page (page 64) for personal annotations.
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