JOHN DEERE THRUST BEARING

John Deere Thrust Bearing – Part No. AR77748

The AR77748 thrust bearing is an essential component of the lower engine assembly on many John Deere tractors. It provides axial support for the crankshaft, limiting longitudinal movement and ensuring precise alignment during engine operation.

This part plays a direct role in the engine’s longevity, particularly during clutch engagement, heavy loads, or changes in engine speed.

Role of the Thrust Bearing

The thrust bearing controls the axial play of the crankshaft. When it is worn, several symptoms may appear:

• Excessive axial play

• Abnormal noises coming from the lower part of the engine

• Premature wear of the main bearings

• Risk of engine block damage

Preventive replacement during an engine overhaul is strongly recommended to avoid more serious damage.

Compatibility with John Deere tractors

The AR77748 bearing is compatible with many John Deere models, including:

10 Series

• 4010 (→ 200999; R40930 blocks, centered groove + off-center groove)

Series 20

• 3020 (123000 →)

• 4000

• 4020 (→ 200999; R40930 blocks)

• 4320

• 4520

• 4620

• 7020

30 Series

• 4230

• 4430

• 4630

40 Series

• 4040 (USA)

• 4240 (EU / USA)

• 4240S

• 4440 (EU / USA)

• 4640

• 4840

• 8440

50 Series

• 4050 (6359T / 6466D)

• 4050E

• 4250

• 4350

• 4450

• 4650

• 4850

• 8,450

55 Series

• 4055

• 4255

• 4455 (MEX 6076T / 6466T / USA)

• 4555

• 4755

• 4955

60 Series

• 4560

• 4760

• 4960

60 & 70 Series

• 8560

• 8570

6005 Series

• 6225

7000 Series

• 7700

• 7800

8000 Series

• 8100 (6076H → 009999)

• 8100 (6081H → 089999)

• 8200 (6076H → 009999)

• 8200 (6081H → 089999)

• 8300 (6076H → 009999)

• 8300 (6081H → 089999)

8030 Series

• 8430

Compatible Motors

This bearing is installed on various John Deere engines, such as:
, 6466T, 3029D, 3029T, 4045T PowerTech, 4270D, 6068T PowerTech, 6076A, 6076H, 6076T, 6081H PowerTech, 6090H PowerTech Plus, 6359T, 6404A, 6404D, 6404T, 6466A, 6466D.

Installation Tips

• Check the engine block type (presence of a centered or off-center groove, depending on the version).

• Check the axial play of the crankshaft after installation.

• Always lubricate with clean engine oil during installation.

• If possible, replace all the bearings during a complete overhaul.

Your part is available at Camagris

At Camagris, a specialist in John Deere tractor parts, we offer the AR77748 thrust bearing with fast delivery throughout Europe.

Our team can help you verify exact compatibility based on your tractor’s serial number or engine type.

A reliable engine part, designed to meet the demands of modern farms.