CAT 079-1136 AXLE SHAFT

CAT 079-1136
Part Name: ARBRE DE ROU (French) → Caterpillar Original Roller Shaft / Track Roller Shaft / Track Roller Shaft
Applicable to: 306E2 / 307E2 excavators, 226B3 / 236B3 / 246B3 skid steer loaders, etc., for the running gear, track roller/track roller components.

I. Basic Information
Part Number: CAT 079-1136 (0791136)
Chinese Name: Roller Shaft / Track Roller Shaft / Track Roller Shaft
English Correspondence: Roller Shaft / Track Roller Shaft / Track Roller Shaft
French Original: ARBRE DE ROU (Roller Shaft)
II. Structure and Material
Structure: Solid shaft part with mounting steps/locating surfaces at both ends, and a journal in the middle for supporting the rotation of the roller/track roller.

Material: 42CrMo alloy steel, tempered and surface hardened, wear-resistant, bending-resistant, and impact-resistant.

Surface Treatment: Blackening/phosphating/galvanizing, rust-proof and wear-resistant.

Hardness: Journal surface HRC 50–55, core HRC 28–32.

III. Key Dimensions (General Specifications, subject to actual product/part drawing)

Junior journal diameter: approx. 35 mm

Overall length: approx. 160–180 mm

End step diameter: approx. 40 mm
Mounting Fit: Clear fit with track roller/sprocket inner sleeve, with oil groove/oil hole lubrication.

IV. Performance and Working Conditions

Applications: Supports the rotation of track rollers/sprockets, withstands track loads, impacts, and lateral forces, ensuring smooth movement.

Operating Temperature: -30℃ ～ +120℃
Applicable Working Conditions: Heavy-duty, high-vibration conditions such as excavation, bulldozing, loading, and construction site movement.

V. Compatible Models (Typical)

306E2, 307E2 Mini Excavators

226B3, 236B3, 246B3 Skid Steer Loaders

Same Series 3044C / 3054C Engine Matching Chassis and Traveling Mechanism

VI. Matching Parts (Commonly Used in the Same Area)

Cover Roller/Carrier Roller Body

Bushing/Bushing Bushing

Floating Oil Seal/O-Ring

Thrust Washer, Snap Ring/Retaining Ring

Grease Nozzle, Dust Cover