CAT 077-9259 RETAINER

CAT 077-9259 is a Caterpillar genuine flange-type retainer (pure original factory information, no additional description), used in powertrain systems to lock the connection between the shaft end and the flange. It is compatible with small and medium-sized excavators, skid steer loaders, and 3044/3054 engines, and can be used with 077-8717 retaining rings, 077-8727 bearings, 077-8807 drive plates, and 077-8864 retainers (Cat®…).

Core Parameters and Information

Item Details
Part Model: CAT 077-9259 (0779259) Flange Type Retainer

Structure Type: Disc-type rigid retainer, central locating hole, circumferentially distributed mounting holes, with axial locating step, compatible with shaft end flange connection

Material: 40Cr alloy steel, galvanized + passivated surface, conforms to CAT MES J4202 retainer specification

Key Dimensions: Outer diameter 90 mm, inner diameter 35 mm, thickness 10 mm, locating hole diameter 35 mm, number of mounting holes 4, mounting hole diameter 8 mm, hole spacing circle diameter 70 mm, locating step height 3 mm

Performance Parameters: Rated axial locking force 10 kN, operating temperature -40℃ to +150℃, flatness ≤0.05 mm, runout ≤0.1 mm, hardness HRC32-38

Compatibility Standard: Compatible with SAE J620 Shaft end connection standard, positioning holes are compatible with CAT 077-8727 bearing shaft ends.

Compatibility: Compatible with CAT 307/308 excavators, 242B/246B skid steer loaders, 3044/3054/3056 engines, etc.

Compatible Models and Application Scenarios:

Compatible Equipment: CAT 306/307/308 mini excavators, 226B/236B/242B skid steer loaders, 3044/3054/3056 engines, hydraulic pump drive shafts, fan drive shafts, etc. (Cat®…)

Application Scenarios: Fan drive shaft end locking, water pump shaft end fixing, generator shaft end positioning, hydraulic pump drive shaft end anti-migration, etc., ensuring stable operation of the transmission system.

Matching Installation: Bolts are tightened to the shaft end, compatible with 077-8727 bearing, 077-8717 bearing retaining ring, 077-8807 drive plate, and 077-8864 retainer. Axial clearance after installation should be ≤0.1 mm.

Installation and Maintenance Points: Clean the shaft end, retainer, and mounting bolts. Check for deformation, cracks, and ensure the shaft end dimensions match and the mounting holes are intact.

Align the retainer’s positioning holes with the shaft end, ensuring it fits against the drive plate or bearing end face. Tighten M8 bolts in a crisscross pattern to a torque of 25-30 N·m.

Post-Installation Inspection: Check for looseness, runout, interference between rotating parts, and no axial movement.

Maintenance: Check bolt torque and wear every 1000 hours. Replace immediately if deformed or with damaged threads.