Travel Motor Seal Kit 7Y4222 for CAT 320CL 322BL Excavators | Final Drive Repair Set

Stop Undercarriage Oil Leaks & Restore Heavy-Duty Track Power

Travel motors endure extreme undercarriage abuse—submerged in abrasive mud, rock slurry, and gravel while handling continuous high-torque directional counter-rotation. When travel motor seals degrade, hydraulic oil leaks out, abrasive contamination enters the planetary gearbox, and tracking power drops significantly.

This heavy-duty 7Y4222 travel motor seal kit delivers complete fluid containment and pressure retention for Caterpillar 320CL and 322BL hydraulic excavators. Every seal in this pack matches original manufacturer dimensional profiles for zero-leak performance under severe field conditions.

Advanced Material & Dynamic Seal Engineering

• High-Temperature Rotary Shaft Seals: Precision-molded from specialized FKM and P6000 Polyurethane compounds to resist lip cracking, friction heat degradation, and hardening at operating temperatures exceeding 120°C.

• Abrasive Excluder Dust Scrapers: Dual-lip wiper profile aggressively repels fine silica sand, wet slurry, and gravel crusts from reaching internal motor bearings and rotating groups.

• Counter-Rotation Buffers & Step Seals: Reinforced bronze-filled PTFE backing rings prevent seal blowout during sudden track braking, high-speed travel transitions, or heavy directional counter-rotations.

• Static Port & Casing O-Rings: High-durometer Nitrile (NBR) rubber maintains tight static sealing across motor housing split lines and valve block interfaces.

Target Equipment & Component Compatibility

• Excavator Models: CAT 320CL, CAT 322BL

• Target Component: Travel Motor / Final Drive Hydraulic Motor Assembly

• Part Number Cross-Reference: 7Y4222 / 7Y-4222

Technical Specifications

• Kit Type: Travel Motor / Final Drive Overhaul Repair Seal Kit

• Primary Materials: P6000 Polyurethane (PU), High-Temp FKM (Viton), Bronze-Filled PTFE, Industrial NBR

• Fluid Compatibility: High-viscosity mineral hydraulic oils, gear lubricants, ISO VG 46/68 fluids

• Application Target: Direct-fit replacement for shop rebuilds or field undercarriage service

Fitment & Maintenance Verification Notice

Excavator undercarriages may feature minor travel motor variations depending on equipment serial prefix or motor manufacturer sub-assembly. Always verify your stamped motor part number or cross-reference 7Y4222 / 7Y-4222 in your Caterpillar parts manual before ordering.