Description
CAT 009-2039 TRUNNION
| CAT 009-2039 TRUNNION |
| CAT 009-2731 RETAINER A |
| CAT 009-2782 BUSHING |
| CAT 009-3032 BUSHING |
| CAT 009-3799 RETAINER |
| CAT 009-4857 BEARING |
| CAT 030-3328 BUSHING |
| CAT 030-8918 BEARING |
CAT 009-2039 is a Caterpillar original single-ear trunnion (pure original, accurate information, no additional description):
Core Parameters and Information
Item Details
Part Model: CAT 009-2039 (0092039) Trunnion (Single-ear Hinged Trunnion)
Part Type: Hinged trunnion for working devices, used to connect cylinders, connecting rods, and frames, providing a stable swing fulcrum, compatible with self-lubricating spherical bearings
Material: 42CrMo alloy steel, tempered HB280-320, key load-bearing surfaces hard chrome plated (thickness 0.05-0.08mm)
Key Dimensions: Shaft diameter 35mm, trunnion inner diameter 55mm, trunnion plate thickness 18mm, shaft length 65mm, mounting hole spacing 40mm, chamfer 1×45°
Structural Features: Integral forged single-ear structure, center trunnion compatible with CAT 008-3053 Spherical plain bearing with locating steps and threaded holes at both ends.
Surface Treatment: Overall blackening and passivation for rust prevention; inner surface Ra≤0.8μm of the lugs; hard chrome plating hardness HV≥850.
Matching: Interference fit with spherical plain bearings (H7/p6), interference 0.015-0.03mm; transition fit with mounting bolts (H7/h6).
Rated Load: Radial dynamic load rating 25kN, static load 55kN; allowable swing angle ±15°; allowable swing frequency 3 cycles/min.
Operating Temperature: -40℃ ～ +120℃
Weight: 0.85 kg
Compatible Models and Assemblies:
Compatible Spherical Plain Bearings: CAT 008-3053 (single lug), 008-3054 (double lug), matching inner ring CAT 008-3178.
Compatible Equipment: CAT 301.7CR/302.7CR excavators, 242D/272D. Boom and Stick Hinge Points of Skid Steer Loaders
Matching Parts: 009-2039 Trunnion, 008-3053 Spherical Plain Bearing, 008-3178 Inner Ring, Pin, Dust Cover, Lock Nut
Installation and Maintenance Points
Clean the trunnion surface and ear hole to remove oil and scale. Ear hole roughness Ra≤1.6μm.
Heat the outer ring of the spherical plain bearing (80-100℃) before assembly, or cold press it in. Do not directly strike the trunnion body.
Post-installation inspection: No jamming during swinging; the bearing and ear hole fit tightly; radial clearance 0.04-0.07mm.
Maintenance: Check trunnion wear and deformation every 1500 working hours. Replace if radial runout exceeds 0.05mm or plating peels off.
