Head As. 4Z6171/164-6403

Head As. 4Z6171/164-6403

Track Type Tractor    Caterpillar    D8L, D9N, D9R, D9T 

Lift Cylinder    Bore    120,65    Stroke    1.570,00    Hydraulic Cylinder

4Z-6171/1646403

4,26 kg

Compatible Brand: Caterpillar

Part Number: 164-6403 (1646403)

Superseded / Interchange Numbers: 4Z-6171 (4Z6171)

Part Name: Track-Type Tractor Blade Lift Cylinder Head Assembly / Gland Assembly

Teknik Özellikler / Technical Specifications: Cylinder Bore Fitment: 120.65 mm / Stroke: 1,570.00 mm / Weight: ~4.26 kg / Hydraulic Cylinder Head / Gland Component

Compatible Machinery: Caterpillar Heavy Mining Track-Type Tractors / Dozers (D8L, D9N, D9R, D9T series)

What It Does:

Serves as the cylinder head (gland assembly) mounted at the front end of the blade lift hydraulic cylinders on Caterpillar D8L, D9N, D9R, and D9T series large track-type tractors (dozers). It securely closes the front section of the cylinder barrel to contain internal hydraulic fluid pressure while providing precision guiding and support for the reciprocating piston rod. Housing rod seals, buffer rings, wiper seals, and wear bands, it maintains high-pressure hydraulic sealing and prevents external contaminants such as abrasive mining dust, slurry, and moisture from penetrating the cylinder.

Importance:

A critical structural and sealing component essential for rod alignment, smooth stroke cycling, and total fluid retention during demanding mining, ripping, and heavy overburden removal. Precision-machined to fit a 120.65 mm bore cylinder with a 4.26 kg high-tensile material construction, it effectively absorbs extreme lateral side loads, dynamic shock pulses, and mechanical vibrations transmitted through the blade lift linkage, protecting internal seals, reducing rod scoring, and preventing external oil leakage under continuous heavy-duty operations.

As Seçkin Makine, we manufacture this product as an aftermarket item fully equivalent to the original specifications in terms of raw materials, technical dimensions, and performance characteristics. This product comes with a 1-year warranty from the invoice date.