CAT 077-3262 RETAINER

CAT 077-3262 is a Caterpillar genuine fuel pump tappet shaft retainer (purely genuine and accurate information, no additional description). It is compatible with the high-pressure common rail fuel pump tappet assembly of C13/C15/C18 engines. It is used in conjunction with the 077-3080 bearing and 077-2844 sealing bushing for axial positioning and fastening of the tappet shaft, preventing shaft movement, ensuring tappet motion accuracy, and avoiding abnormal wear and vibration.

Core Parameters and Information

Item Details
Part Model: CAT 077-3262 (0773262) Tappet Shaft Retainer

Structure Type: Semi-circular ring clamp type retainer with positioning boss and bolt holes, used for axial limiting and circumferential anti-rotation

Material: 42CrMo alloy steel (quenched to HRC45-50, surface anodized black for corrosion protection), Weight: 0.042 kg

Key Dimensions: Inner diameter 22 mm, outer diameter 35 mm, width 10 mm, positioning boss height 3 mm, bolt hole specification M6×1, center distance 28 mm

Performance Parameters: Rated clamping force 8 kN, operating temperature -40℃ to 150℃, anti-rotation torque ≥15 N・m, axial movement of the compatible tappet shaft ≤0.02 mm

Compatibility Standard: Complies with CAT 4W-7023 retainer technical specifications, dimensional tolerance ±0.01 mm, flatness ≤0.005 mm Compatible Models and Assemblies

Compatible Parts: 077-3080 Tappet Shaft Support Bearing, 077-2844 Sealing Bushing, 069-5112 Bushing, 068-8555 Retaining Ring

Compatible Equipment: CAT 336D2L/349D2L Excavators, 980M/982M Loaders, D8T/D9R Bulldozers (C13/C15/C18 Engines), used for axial fixation of the tappet shaft of the high-pressure common rail fuel pump

Installation: One piece per tappet shaft, installed on the outside of the bearing, secured with M6 bolts (tightening torque 8-10 N・m), cooperating with the retaining ring to achieve double axial limit.

Installation and Maintenance Points: Clean the retainer, tappet shaft, and mounting surface. Check the retainer for deformation and cracks. Ensure the positioning boss matches the pump body groove. The surface roughness Ra ≤ 1.6 μm.

During installation, first insert the retainer into the groove of the tappet shaft, ensuring the positioning boss is embedded in the pump body’s positioning hole. Then, tighten the M6 ​​bolts to the specified torque to prevent the retainer from loosening.

After installation, check that the axial movement of the tappet shaft is ≤0.02 mm, the clearance between the retainer and the bearing end face is 0.1-0.2 mm, and the tappet reciprocating motion is smooth without jamming or abnormal noise.

Maintenance: Every 2000 hours, check the retainer bolt torque (tighten if below 8 N·m), and simultaneously check the wear of the positioning boss (replace if wear >0.05 mm) to prevent shaft movement from damaging the bearings.