CAT 370-1675 262mm Outer Diameter Articulating Hitch Cap

CAT 370-1675 is a Caterpillar bearing end cover, suitable for axial positioning and sealing of D6T/D7E bulldozer counterweight beam trunnion bearings and 966M/972M loader rocker arm articulation bearings under heavy-duty conditions. The following is professional structured information.

Core Parameters (Professional Version)

Project Details
Basic Attributes
Model 370-1675, 2 pieces per unit, compatible with Cat D6T/D7E bulldozer balance beam trunnion bearings (584-4164 YM sleeve bearings), 966M/972M loader rocker arm hinge bearings, used for axial positioning, sealing and dust prevention, suitable for heavy-duty swinging conditions.

Key Dimensions
Outer diameter 120 mm, inner diameter 85 mm, thickness 15 mm, number of bolt holes 4 (evenly distributed, φ10 mm, center circle diameter 105 mm), positioning step diameter 105 mm (tolerance h7), sealing groove width 5 mm, depth 2 mm, surface roughness Ra≤1.6 μm

Material and Process
Material is 4140 chromium-molybdenum alloy steel (quenched and tempered HRC28–32), surface galvanized and passivated (thickness 0.01–0.02 mm), corrosion resistance grade ≥96 Hourly salt spray test, bolt hole chamfer C1×45°, end face flatness ≤0.02 mm

Performance Parameters: Rated axial load ≥80 kN, sealing adapter O-ring (Cat 106-9900, φ105×3.5 mm), installation torque 80–100 N・m, operating temperature -40℃ to +120℃, compatible bearing outer ring diameter 105 mm

Compatible Models: Cat D6T/D7E bulldozer balance beam, 966M/972M loader rocker arm, matching bearing 584-4164 YM, trunnion 527-7491, compatible seat bore diameter 120 mm (tolerance H7)

Installation and Maintenance Points: Clean the end cover and seat bore before installation, check the sealing groove for damage, apply Cat 106-9900 grease when installing the O-ring to ensure reliable sealing. The gap between the end cap and the bearing outer ring should be ≤0.03 mm. Bolts should be tightened symmetrically and evenly (torque 80–100 N·m) to prevent abnormal bearing clearance caused by uneven loading.

Every 1500 hours, check for loose end cap bolts (torque attenuation >10%) or aging O-rings. If any abnormalities are found, tighten or replace them immediately to prevent dust and moisture from entering the bearing.

Use a dedicated puller during disassembly to avoid deforming the end cap or damaging the bearing outer ring. After disassembly, check for wear on the locating steps (wear >0.1 mm). Replace the end cap if necessary.