CAT 4L-5849 Filter Spring Guide

CAT 4L-5849 (4L5849) is a Caterpillar guide tube/alignment guide, also often referred to as a “guide sleeve”. It is widely used for the installation, positioning, guidance and protection of shafts and rods in the engines, hydraulic systems or transmission components of construction machinery. It is compatible with engines such as 3306, C7, and C9, as well as hydraulic cylinders, connecting rods, rocker arms and other parts of loaders/excavators, ensuring accurate assembly of parts, stable operation and reducing uneven wear and interference. The following is the core information:

Core Technical Parameters
Item Details
Part Model CAT 4L-5849 (4L5849) Guide Guidance / Positioning Guidance
Material Q235 Carbon Steel / 40Cr Alloy Steel, Stamped Forming + Surface Galvanized Passivation / Phosphating, Rust-proof and Wear-resistant
Key Dimensions Length 96.5 mm (3.8 in), Width 17.8 mm (0.7 in), Height 71.1 mm (2.8 in), Inner Diameter Commonly 16–25 mm (suitable for corresponding shaft diameter), Wall Thickness 2–3 mm
Single Weight Approx. 0.05 kg (0.1 lbs)
Surface Treatment Galvanized Passivation / Phosphating, Corrosion Resistance Grade ≥8, Salt Spray Test ≥48 h
Compatible Models CAT 3306 Engine, C7/C9 Engine, 950M/962M Loader, 320GC/330GC Excavator, 140M Graders, etc.

Core Functions: Positioning and guiding, protecting shafts/rods, preventing uneven wear, preventing interference, suitable for assembly and motion guidance scenarios.

Core Functions and Structural Features:

Precise Positioning and Guiding: Provides installation and operation guidance for shafts and rods, ensuring coaxiality and avoiding uneven wear, jamming, and abnormal noise caused by sway. Suitable for high-frequency reciprocating or rotating parts.

Structural Protection: Isolates shafts/rods from surrounding components, preventing impacts and wear, protecting journals, seals, and housing bores, extending the life of related components.

Lightweight and Rigidity Balance: Made of stamped carbon steel/alloy steel, lightweight (approximately 0.05 kg) while ensuring structural rigidity, not easily deformed, suitable for vibration and impact conditions.

Rust-resistant and Durable: Zinc-plated passivation/phosphating surface treatment, suitable for harsh conditions such as dusty, humid, and muddy environments, reducing assembly jamming and functional failure caused by rust.

Installation and Maintenance Points

Installation Specifications
Clean the installation area, removing oil, metal shavings, and burrs. Ensure the conduit fits snugly against the mounting surface, without gaps or tilting.

Secure with locating pins/bolts. Bolt torque should conform to the equipment manual (typically 15–25 N·m). Avoid overtightening to prevent conduit deformation.

After assembly, check the shaft/rod’s smooth movement within the conduit. Ensure there is no jamming or interference, and the coaxiality deviation is ≤0.1 mm.

Maintenance Recommendations
Inspect every 1000 working hours: Check for conduit deformation, rust, loosening, and wear or scoring at the shaft/rod mating points.

Replace the conduit immediately if deformation, wall wear >0.5 mm, or severe rust occurs to prevent further shaft/rod wear.

Regularly clean the inner and outer surfaces of the conduit to remove oil and impurities, ensuring proper guiding and protective functions.