CAT 031-4772 RETAINER A

CAT 031-4772 is a Caterpillar genuine bearing axial retainer assembly (purely original and accurate information, no additional description). It is compatible with radial spherical plain bearings such as 030-8918/031-1316, and is used for axial positioning and anti-migration of bearings at the hinge points of the boom, stick, and hydraulic cylinders of excavators/skid steer loaders. It is also compatible with 030-3328 bushings and 009-3799 retainers.

Core Parameters and Information

Item Details
Part Model: CAT 031-4772 (0314772) Fixing Assembly (including locking plate, locating pin, and elastic retaining ring)

Part Type: Combined axial fixing assembly, including main fixing clamp, anti-loosening locking plate, locating pin, and elastic retaining ring, adapted for spherical plain bearing outer rings with locating grooves, used to limit axial displacement of the bearing

Material: Main fixing clamp (40Cr tempered steel, HRC28-32), anti-loosening locking plate (65Mn spring steel, HRC42-45), locating pin (35 steel, HB180-200), elastic retaining ring (60Si2Mn, HRC48-52)

Key Dimensions: Fixing clamp opening width 4 mm (adapts to bearing locating groove), clamping diameter 52/58 mm (adapts to 030-8918/031-1316 bearings), locking plate thickness 1.5 mm, locating pin diameter 3 mm, length 12 mm mm, elastic retaining ring inner diameter 48 mm

Structural Features: Main fixing clamp with axial limiting boss (height 1 mm), locking plate with anti-loosening serrations (tooth pitch 0.8 mm, tooth depth 0.3 mm), locating pin for positioning the fixing clamp and mounting base, elastic retaining ring provides preload force

Surface Treatment: Main fixing clamp galvanized + color passivation, locking plate blackened, locating pin cadmium plated, elastic retaining ring natural color

Matching Method: Transition fit with bearing positioning groove (H7/h6, clearance 0.01-0.03 mm), bolt connection with mounting base (M6×12 socket head cap screw, torque 8-10 N・m)

Rated Load: Axial load 15 kN, anti-loosening torque 12 N・m, operating temperature -40℃ ～ +120℃

Weight: 0.08 kg (single set)

Compatible Models and Assemblies

Compatible Parts: CAT 030-8918/031-1316 bearings, CAT 030-3328 Bushing, CAT 009-3799 Fixing Gear

Compatible Equipment: Boom-Stick Hinge Point and Bucket Cylinder Upper Hinge Point of CAT 301.7CR/302.7CR Excavators and 242D/272D Skid Steer Loaders

Matching Parts: 031-4772 Fixing Gear Assembly, 030-8918/031-1316 Bearings, 030-3328 Bushing, M6×12 Socket Head Cap Bolts (2 per assembly)

Installation and Maintenance Points:

After press-fitting the bearing into place, insert the main retaining clamp into the bearing outer ring locating groove, ensuring a tight fit with the groove bottom without gaps.

Insert the locating pin, install the anti-loosening locking plate and bend the locking plate flange (90° angle), then tighten the M6 ​​bolts to the specified torque.

Install the elastic retaining ring, ensuring it fits snugly against the end face of the retaining clamp. Axial preload: 0.5-1 kN.

Maintenance: Inspect every 1000 working hours. Replace the retaining clamp if deformation exceeds 0.2 mm, the locking plate teeth are worn, the locating pin is loose, or the elastic retaining ring fails. Simultaneously check the condition of the bearings and bushings.