Steering Knuckle for John Deere, Case, Ford, and Steyr L40036

L40036 Steering Knuckle for John Deere, Case, Ford, and Steyr tractors

The L40036 steering knuckle is a front-end component that is mounted between the steering knuckle and the front axle. Its function is to allow the steering wheels to articulate while maintaining proper steering control. This part number is listed for several John Deere tractors, as well as for certain Case, Ford, and Steyr models.

Role of the steering knuckle pivot in the front suspension

The steering knuckle pivot plays a direct role in the operation of the front steering system. It connects the steering knuckle to the axle and accommodates wheel movement during maneuvers and field work. On a tractor operating under load, with front-mounted implements, or on uneven terrain, this area is subjected to repeated stress.

The part is specified as made of heat-treated steel to withstand impacts, wear, and the mechanical stresses encountered in this type of use. In this family of parts, advanced wear can cause play in the front axle and disrupt steering performance.

Known Applications for Part Number L40036

Part number L40036 is used in numerous agricultural tractors. For John Deere models, it is found in particular on the 1550, 1640, 1750, 1750V, 1840, 1850, 1850N, 1850V, 1950, 1950N, 2040, 2040S, 2250, 2450, and 2650. The application text also mentions several variants such as the 1640F, 1840F, 2040 (USA), 2040S (Germany), 2250F, 2450F, 2650CS, 2650F, 2650N, and 2650TSS.

The listed compatibility also includes various tractors Case, Ford, and Steyr. For these brands, as well as for John Deere, it is important to note the exact model designation and variant, if applicable.

When should you consider replacement?

A worn steering knuckle can manifest itself through several symptoms in the front suspension:

• noticeable play in the steering,
• vibrations felt through the steering wheel,
• premature wear on the front tires,
• less consistent straight-line stability,
• reduced stability when the tractor is working under load.

These signs warrant a prompt inspection, especially on a tractor used extensively for maneuvering, with a loader, or on hilly terrain.

Helpful guidelines for selecting this part

To select this steering knuckle, start by comparing part number L40036 with your requirements and note the tractor’s full model designation. For certain applications, the model version is important: variants such as F, N, V, CS, TSS, or country designations like Deutschland, España, or USA.

If your machine is listed among the indicated applications, this part number corresponds to the mounting type you’re looking for. If you’re unsure between two similar versions of the same tractor, it’s best to check the existing mounting before proceeding and follow the procedure specified for the front axle.

Before finalizing your selection, check the part number and the exact application of your tractor to ensure you select the correct steering knuckle.

Compatibility by Brand and Series

Case · Tractor

• 2120
• 2130
• 2140
• 2150
• 238
• 258
• 268
• 288
• 385
• 395
• 485
• 485XL
• 495
• 495XL
• 585
• 585XL
• 595
• 595XL
• 685
• 685XL
• 695
• 695XL
• 743
• 743XL
• 745
• 745S
• 745XL
• 785
• 785XL
• 795
• 795XL
• 844
• 844S
• 844XL
• 845
• 845XL
• 856
• 856XL
• 884
• 885
• 885XL
• 895
• 895XL
• 985
• 995
• 995XL
• C48

Ford · Tractor

• 5110
• 5610
• 6410
• 6610
• 6610O
• 6710
• 6810
• 7410
• 7610
• 7610O
• 7710
• 7910
• 8210

John Deere · Tractor

• 1550
• 1640
• 1750
• 1750V
• 1840
• 1850
• 1850N
• 1850V
• 1950
• 1950N
• 2040
• 2040S
• 2250
• 2450
• 2650

Steyr · Tractor

• 942
• 948

John Deere · S Series

• widely used in farming
• such as the 40
• 50
• F
• N, or V models. It is a perfect replacement for the original part, restoring precise and safe steering

John Deere

• 1640 (Germany)
• 1640 (Spain)
• 1640F
• 1840 (Germany)
• 1840 (Spain)
• 1840F
• 2040 (Germany)
• 2040 (Spain)
• 2040 (USA)
• 2040S (Germany)
• 2040S (Spain)

John Deere · 50 Series

• 1550
• 1750

John Deere · 1850 Series

• 1850 (Germany)
• 1850 (Spain)
• 1850F

John Deere · 1950 Series

• 1950 (Germany)
• 1950 (Spain)
• 1950F

John Deere · 2250 Series

• 2250 (Germany)
• 2250 (Spain)
• 2250F

John Deere · 2450 Series

• 2450 (Germany)
• 2450 (Spain)
• 2450F

John Deere · 2650 Series

• 2650
• 2650CS
• 2650F
• 2650N
• 2650TSS

FAQ — Frequently Asked Questions

What is the function of a steering knuckle on a tractor?

The steering knuckle pivot provides the articulation between the steering knuckle and the front axle. It guides the steering wheels and helps maintain proper alignment of the front end. When this part develops play or wears out, steering can become less smooth, and stress is transferred more heavily to the front assembly.

What signs might indicate that the L40036 steering knuckle needs to be replaced?

Replacement should be considered if there is play in the steering, vibrations in the steering wheel, abnormal wear on the front tires, or reduced straight-line stability. These symptoms may appear sooner on a tractor used with a front loader, during repeated maneuvers, or on uneven terrain.

Is part number L40036 exclusive to John Deere 1640 and 2040 tractors?

No, this part number is also listed for other John Deere tractors such as the 1550, 1750, 1840, 1850, 1950, 2040S, 2250, 2450, and 2650, as well as certain models from Case, Ford, and Steyr. However, you must verify the exact application based on the model and its variant.

How can you correctly identify this steering knuckle before ordering?

The best approach is to check part number L40036 and the tractor’s full model designation. On certain John Deere models, the variant also matters—for example, Deutschland, España, USA, F, N, V, CS, or TSS. This verification prevents confusion between two similar configurations on the same base model.

Original replacement part numbers and brands are provided solely for comparison purposes. This does not imply that these are original parts.