CAT 053-4484 CAP

CAT 053-4484 is a genuine Caterpillar shaft end protector (purely original and accurate information, no additional description). It is compatible with the exposed ends of hydraulic pump spindles, fan drive shafts, or gearbox input shafts in C7/C9 engines, 320D/323D excavators, 950H/966H loaders, etc. It is used in conjunction with the 039-8914 bearing cap and 038-7406 bearing housing, providing dust, impact, and moisture protection, protecting the shaft end threads and sealing surfaces, and preventing damage to components during transportation or downtime.

Core Parameters and Information

Item Details
Part Model: CAT 053-4484 (0534484) Shaft End Protective Cap (CAP)

Type: Plastic threaded screw-on protective cap with O-ring sealing groove, suitable for external thread shaft ends/bearing cover end caps

Material: PA66 reinforced nylon, with 30% glass fiber added, wear-resistant surface coating, oil and chemical corrosion resistant, suitable for engineering machinery hydraulic oil/gear oil environments

Key Dimensions: Suitable for shaft end threads M36×2, inner diameter 36 mm, outer diameter 42 mm, height 25 mm, top diameter 45 mm, sealing groove diameter 38 mm, groove width 2 mm, weight 0.08 kg

Sealing Method: Built-in NBR nitrile rubber O-ring, suitable for 038-7407 sealing rings, protection rating IP65, prevents dust, moisture and impurities from entering

Applicable Temperature: -40℃ ～ +120℃, suitable for engine compartment and transmission system temperature environments.

Installation Method: Threaded tightening; tighten clockwise until it fits the bearing cap end face. O-ring compression seal. Disassembly requires no special tools and can be done manually.

Compatible Models and Assemblies

Compatible Parts: CAT 039-8914 Bearing Cap, 038-7406 Bearing Housing, 050-8785 Bearing, 039-8729 Shaft Retaining Ring

Compatible Equipment: CAT 320D/323D excavators, 950H/966H loaders, D6R bulldozers, etc., equipped with C7/C9 engines. Used for protection of the hydraulic pump input shaft end, fan pulley shaft end, and exposed ends of the gearbox second shaft.

Matching Parts: 053-4484 Shaft End Protective Cap, 039-8914 Bearing Cap, 038-7406 Bearing Housing, 038-7407 Sealing Ring Installation and Maintenance Points: Before installation, clean the shaft end threads and the inner threads of the protective cap, ensuring they are free of burrs, oil, and rust. Inspect the protective cap for cracks, deformation, or coating peeling.

Embeddeeper the 038-7407 O-ring into the O-ring groove of the protective cap, apply a thin layer of grease, align with the shaft end threads, and tighten clockwise to a torque of 5-8 N·m, ensuring a tight seal between the O-ring and the bearing cap end face.

After installation, check for looseness, gaps, leaks at the protected area, and no exposed areas on the shaft end.

Maintenance: Remove before equipment operation; install during shutdown or transport. Check the integrity of the protective cap every 1000 working hours; replace immediately if damaged. Avoid contamination or impact to the shaft end.