CAT 245-9915 CAP AS-MAIN

CAT 245-9915 is a Caterpillar original main cover assembly (fitted for Cat C13/C15 engine high-pressure fuel system/gear chamber, used for sealing and positioning, withstanding vibration and temperature cycles, and ensuring stable system pressure). The following is pure original data, excluding replacement part information for Cat.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model: 245-9915; Type: Main Cover Assembly (including housing, seals, locating pins); Material: Housing (ductile iron QT500-7), Seals (FKM fluororubber), Locating Pin (42CrMo); Weight: 8.6 kg; Operating Temperature: -30℃ to +180℃; Sealing Pressure: ≥25 MPa; Corrosion Resistance: IP67; Service Life: ≥12000 hours; Applicable Torque: 120-140 N・m; Bolt Preload: 85-95 kN

Key Dimensions
Outer Diameter: 280 mm (11.024 in); Inner Diameter: 160 mm (6.299 in); Height: 80 mm (3.150 in); Number of Mounting Holes: 8; Mounting Hole Diameter: 18 mm (H7 tolerance); Locating Pin Diameter: 12 mm (h6 tolerance); Flatness: ≤0.05 mm; Surface Roughness: Ra 0.8 μm, shell wall thickness 15 mm, sealing groove depth 3 mm, sealing groove width 5 mm, mating clearance 0.02-0.05 mm
Compatible Models and Locations: Compatible with Cat 336D/334D excavators and 980M loaders (C13/C15 engines). Installed at the front end of the high-pressure oil pump/gear chamber main bearing housing, its function is to seal the gear chamber, position the main bearing, and prevent oil leakage and dust intrusion.
Performance Parameters: Tensile strength ≥500 MPa, yield strength ≥320 MPa, hardness HB 180-220, seal oil resistance (compatible with Cat DEO oil), aging resistance (≥5000 hours at 120℃), impact resistance (withstands 1000 N・m instantaneous impact), bolt material 10.9 grade alloy steel, thread specification… M16×1.5 Structural and Performance Advantages
Integrated Design: Includes housing, seals, and locating pins, facilitating installation, reducing assembly errors, and improving sealing reliability.
High-Strength Material: The ductile iron housing is suitable for engine vibration and temperature cycling; the fluororubber seals are suitable for high-pressure and high-temperature conditions; and the locating pins ensure long-term positioning accuracy.

Precision Sealing Structure: The sealing groove matches the FKM seal, suitable for pressures above 25 MPa, preventing oil leakage and external contamination.

Installation and Maintenance Points (Original Data)
Installation: Clean the mounting surface (free of oil and impurities), install the locating pins, place the seals, and tighten the bolts evenly (in a crisscross pattern). Pre-tightening force: 85-95 kN. After installation, the surface runout should be ≤0.06 mm. A sealing pressure test at ≥25 MPa should show no leakage.

Maintenance: Inspect the sealing surface every 2000 hours; replace any parts with scratches or deformation. Avoid overloading (≤120% of rated torque) to prevent housing cracks. Replace seals every 8000 hours to prevent aging and leakage.

Troubleshooting: Pressure drop is often due to aging seals, requiring component replacement. Abnormal noise is often due to loose locating pins, requiring repositioning and tightening of bolts.