CAT 077-3600 BEARING

CAT 077-3600 is a Caterpillar genuine bearing (purely original and accurate information, no additional description). It is a radial support bearing for the high-pressure fuel pump rotor assembly, suitable for C13/C15/C18 engines. It provides stable support for the rotor assembly, reduces rotational friction, and ensures the accuracy and smooth operation of the high-pressure fuel pump. Cat®…

Core Parameters and Information

Item Details
Part Model: CAT 077-3600 (0773600) Bearing

Structure Type: Single-row deep groove ball bearing with dust cover and cage, for radial load support

Material: Bearing steel (chrome steel), cage is reinforced nylon, dust cover is cold-rolled steel plate

Key Dimensions: Inner diameter 45 mm, outer diameter 70 mm, width 12 mm, chamfer 1.5 mm, compatible shaft diameter tolerance H7

Performance Parameters: Rated dynamic load 18.5 kN, rated static load 12.2 kN, limiting speed 8000 rpm (grease lubrication)

Compatibility Standard: Complies with CAT bearing technical specifications, rotational accuracy P6 grade, radial clearance C3 group, surface roughness Ra≤0.8 μm

Compatible Models and Assemblies

Compatible Parts: 077-3545 retainer, 077-3553 Bearing retainer ring, high-pressure fuel pump rotor assembly

Compatible equipment: CAT 336D2L/349D2L excavators, 980M/982M loaders, D8T/D9R bulldozers (C13/C15/C18 engines), used for radial positioning and support of the high-pressure fuel pump rotor.

Installation: 1 piece per fuel pump, installed on the rotor journal, with a 077-3553 bearing retainer ring on the outside to prevent axial movement.

Installation and maintenance points:
Clean the journal and bearing housing bore, check the bearing for rust, deformation, and rolling element jamming, and ensure the dust cover is intact.

Cold press installation using a press (do not strike). The bearing outer ring should have an interference fit with the housing bore (tightness tolerance 0.01-0.02 mm), and the inner ring should have a transition fit with the journal.

After installation, check that the rotor rotates freely without abnormal radial runout (runout ≤ 0.05 mm) and without abnormal noise.

Maintenance: Check the bearing operation every 2000 hours. Replace the bearing promptly if abnormal noise, abnormal temperature rise, or increased clearance is found to avoid rotor eccentric wear.