CAT 111-1308 14mm Inner Diameter Bushing

CAT 111-1308 (1111308) is a Caterpillar genuine straight-sleeve bushing, suitable for working devices/chassis hinges, providing wear-resistant support and low-friction guidance. The following is pure genuine information (no replacement parts available):

Core Parameters and Genuine Information

Item Details
Part Model: CAT 111-1308 Bushing (Genuine)

Part Type: Steel-backed composite self-lubricating bushing (steel back + bronze alloy + PTFE self-lubricating layer), suitable for medium-load hinges/swinging parts

Material: Steel back (low-carbon alloy structural steel) + bronze alloy intermediate layer + PTFE self-lubricating surface layer, with axial oil reservoir in the inner bore, suitable for oil-free/periodic lubrication conditions

Key Dimensions: Inner diameter approx. 38.00 mm (1.496 in), outer diameter approx. 50.00 mm (1.969 in), length approx. 60.00 mm (2.362 in) (in), with 30° chamfered ends, no axial flange, standard straight cylindrical structure.

Structural Features: Thin-walled cylindrical shape, with an inner oil reservoir to reduce the coefficient of friction and improve wear resistance, suitable for low-to-medium speed oscillation/rotation conditions.

Compatible Structures: Matched with pins (such as 111-1309, 111-1310) and retaining rings (111-1311), used for rotating parts such as boom/stick hinges, connecting rods, and chassis suspension.

Applicable Working Conditions: Low to medium load, frequent oscillation/rotation, suitable for dusty and humid outdoor working environments.

Compatible Models (Original Equipment Manufacturer Matching):

CAT 307C/308C Excavators (boom, stick, connecting rod hinge points)

CAT 938G/950G Wheel Loaders (working device connecting rods, steering knuckles)

CAT D5K/D5N Bulldozers (track frames, working device hinge points)

CAT 420E/422E Excavator Loader (Frame and Working Device Hinge Point)
Installation and Fitting Points (Original Factory Standard)
* **Clear Fit with Pin:** Standard radial clearance 0.018–0.032 mm, ensuring smooth and unobstructed rotation.
* **Installation Fit with Mounting Seat Hole:** Interference fit (0.022–0.042 mm). Use a dedicated press-fit tool for cold pressing assembly. Do not strike the bushing body.
* **Before Installation:** Clean the journal and mounting hole, removing burrs, rust, and impurities. Pre-install seals and retaining rings to ensure reliable axial positioning.
* **Axial Positioning:** Axial positioning is achieved using retaining rings/steps to prevent movement. After installation, check for smooth rotation, no abnormal noise, no axial movement, and unobstructed lubrication channels.
* **Add the specified grease (e.g., CAT 2G-9662 lithium-based grease) according to the machine manual. Replenish grease every 500 hours after initial lubrication.