CAT 510-0119 Suspension Cylinder Bearing Cap

CAT 510-0119 is a Caterpillar engine crankshaft main bearing cap assembly, compatible with C15/C18 ACERT engines (used in 349D2/374D excavators, 988K loaders, etc.). Its core function is to secure the main bearing, seal the crankcase, and bear the radial load of the crankshaft, ensuring smooth crankshaft operation. The following is professional structured information.

Core Parameters (Professional Version)

Item Details
Basic Attributes Model 510-0119, Quantity per unit: 1 piece (3rd cylinder main bearing cap), Matching main bearing 8N-6309 (inner diameter 100 mm), Matching bolts 108-7725 (M16×2, grade 10.9), Locating pin 8C-3277 (φ12 mm), Single component weight 12.5 kg, including bearing cap body, locating pin, sealing gasket, and bolt anti-loosening plate

Key Dimensions Bearing hole diameter 100 mm (tolerance H7: 0–+0.035 mm), bolt hole pitch circle diameter 140 mm, bolt hole diameter 17 mm (tolerance H8: 0–+0.043 mm), locating pin hole diameter 12 mm (tolerance H7: 0–+0.018 mm), Length 210 mm (tolerance ±0.2 mm), Width 85 mm (tolerance ±0.1 mm) 1. Dimensions: 60 mm (tolerance ±0.1 mm), bearing cap end face flatness ≤0.03 mm
2. Material and Process: 42CrMo alloy steel (quenched and tempered HB260–290), surface carburized and quenched (carburized layer depth 0.8–1.2 mm, surface hardness HRC58–62), bearing hole honed (roughness Ra≤0.4 μm), bolt hole internal thread accuracy 6H, locating pin hole reamed (fitting clearance 0.01–0.02 mm)
3. Performance Parameters: Rated load ≥200 kN, operating temperature -40℃ to +150℃, bolt preload torque 450 N・m + 90° rotation angle, gasket resistant to engine oil/diesel, locating pin repeatability ≤0.01 mm, bearing cap body fatigue life ≥10⁶ cycles
4. Compatible Engines: Cat C15/C18 ACERT engine For 349D2/374D/390F excavators, 988K/992K loaders, and 777G mining trucks, the matching crankshaft is 127-0019, and the connecting rod assembly is 160-6310. Installation and Maintenance Points: Before installation, clean the bearing cap and cylinder block mating surfaces, checking for scratches/deformation. Apply Cat MTO-1000 grease to the bearing bores. Press the locating pin into the cylinder block (pressure ≤10 kN). Ensure the gasket is firmly against the mating surface. Pre-tighten the bolts diagonally → 450 N·m torque → tighten at a 90° angle. Secure the bolt heads with anti-loosening pads.

Maintenance Cycle: Every 2000 hours, check the bearing cap bolt torque (≤420 N·m requires retightening), and inspect for bearing bore wear (replace when diameter wear >0.1 mm). If leakage is found at the mating surface, immediately replace the gasket and retighten.

Troubleshooting: If abnormal crankshaft noise occurs, first check the bearing cap bolt torque, bearing wear, and loose locating pins. If necessary, replace the bearing cap assembly and main bearing.