Porsche Super tractors, built from the 1950s to the early 1960s, are coveted vintage machines. Restoring or maintaining one requires sourcing authentic parts. This guide covers the essential components, compatibility considerations, and practical advice for locating Porsche Super tractor parts.
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Understanding the Porsche Super Tractor Line
Before diving into parts, it helps to know the model variations. Porsche produced several tractor series, with the "Super" designation applied to models like the Porsche Diesel Super, Porsche Super N, and Porsche Super S. These tractors featured air-cooled diesel engines and advanced hydraulics for their time.
Key models that share parts:
- Porsche Diesel Super (1956–1963)
- Porsche Super N (1957–1963)
- Porsche Super S (1960–1963)
Many components interchange between these models, but some are unique. Always verify part numbers before purchasing.
Engine Components
The heart of a Porsche Super tractor is its air-cooled diesel engine. Common engine parts include:
Cylinder Heads and Valves
Cylinder heads are prone to cracking from thermal stress. Original Porsche heads are scarce; aftermarket options from European suppliers are available but must be checked for compatibility with your specific engine block. Valve guides and seats often need replacement during a rebuild.
Pistons, Rings, and Liners
Pistons and liners wear over time. For the Super models, the bore sizes vary: 95 mm for the Super N, 100 mm for the Super S. Measure your block or consult a specialist to order the correct size. Aftermarket sets from companies like Mahle or Kolbenschmidt are reliable.
Injection Pumps and Injectors
Bosch fuel injection equipment is standard. The injection pump often requires recalibration. Rebuild kits are available, but ensure the pump model matches (e.g., Bosch VE or A-type). Injectors should be matched to the cylinder head and pump timing.
Transmission and Drivetrain
Clutch Assembly
Porsche Super tractors use a single dry clutch. Clutch plates and pressure plates are available from aftermarket sources like LUK or Sachs. The release bearing is a wear item. Note that early and late models have different spline counts.
Gears and Bearings
Transmission gears are robust but can show wear. Complete gear sets are hard to find; often, individual gears from parts tractors are the only option. Bearings are standard metric sizes and can be sourced from bearing suppliers if you have the dimensions.
Axles and Differential
Rear axle seals and bearings are common service items. The differential lock assembly uses a cone clutch that may need adjustment or replacement. Axle shafts can be resplined if worn, or sourced used.
Hydraulic System
Hydraulic Pump and Lift Arms
The Super tractors have a three-point hitch controlled by a hydraulic pump. Pump rebuild kits with seals and O-rings are available. Lift arms and linkage pins should be checked for slop. Genuine Porsche parts are preferable for critical safety components.
Control Valve
The hydraulic control valve is often stuck due to gummed oil. Disassembly and cleaning may restore function. If replacement is needed, a generic valve with similar specs can be adapted, but it requires careful plumbing.
Electrical System
Starter and Generator
Original starters are Bosch units. Rebuild kits for the starter (brushes, bushings) are inexpensive. Generator parts (voltage regulator, brushes) are also available. Consider converting to an alternator if you plan extended use.
Wiring Harness
Wiring degrades over decades. Pre-made harnesses for Porsche Super tractors are produced by a few specialists. They often include correct connectors and color-coded wires. Installing a new harness eliminates electrical gremlins.
Body and Sheet Metal
Fenders, Hood, and Grille
Sheet metal parts are highly sought after. Original fenders and hoods are available from salvaged tractors, but often dented. Aftermarket reproduction panels exist for some models, but fitment varies. The grille is unique to each model and frequently broken.
Wheels and Tires
Porsche Super tractors use 4-lug or 6-lug wheels depending on the year. Tire sizes are 6.00-16 front and 11.2-28 rear (or similar). Modern tires in these sizes are available from brands like Firestone, Titan, or BKT.
Where to Find Parts
- Specialist dealers: Several US companies focus on vintage tractor parts, including Porsche. They offer new old stock (NOS) and reproduction items.
- Tractor salvage yards: Some yards specialize in European imports. Call ahead with your model and part needs.
- Online forums: The Porsche Tractor Owners Club forum and Facebook groups have classified sections. Members often sell or trade parts.
- Auction sites: Ebay (though not a marketplace, it's a common source) – use caution with condition and return policies.
Practical Tips for Buying Parts
- Always confirm fitment using the part number or measurements.
- When buying used, ask for photos of wear surfaces.
- For engine internals, prefer new parts over used – the cost difference is worth reliability.
- Keep a parts manual and parts list for your specific model.
Final Recommendation
Restoring a Porsche Super tractor is labor-intensive but rewarding. Start with a complete, running tractor if possible, then focus on engine and hydraulic health. For parts, prioritize the core engine and drivetrain components – bodywork can wait. Build relationships with a few trusted suppliers and fellow enthusiasts. With careful sourcing and patience, you can keep your Porsche Super tractor running for decades to come.