6692633 6668135 Final Drive for Bobcat 325 328 D 325D 328D | Nachi PHV-3B Travel Motor (12-Hole Mount)

Massive 4114 N·m Tractive Torque for 2.8–3.5T Bobcat Earthmovers. Direct OEM replacement Nachi PHV-3B high-displacement hydraulic travel motor complete with integrated planetary reduction gearbox, engineered specifically for 12-bolt mount Bobcat 325, 328, 328G, and X325 mini excavators.

1. Technical Operating Specifications

(Authority verified via Bobcat parts catalogs & Nachi hydraulic engineering specs)

2. Resolving Bobcat 325/328 Track Drag & Torsional Bolt Shear

Experiencing single-track stall when counter-rotating in hard rock, or loose bolts around your final drive flange? At 3.5 tons, the Bobcat 325/328 platform delivers an immense 4114 N·m of peak tractive force. Continuous pivot turning on rocky ground exerts brutal cyclic shear on mounting interfaces. In high-hour drives, worn internal cylinder barrel splines and fatigued relief valves cause asymmetric pressure spikes, leading to track chatter and stretched mounting hardware. Installing our precision-machined 6692633 final drive reinstates true 12-bolt clamping integrity, stops internal pressure bypass, and restores factory 26.0 MPa breakout traction.

3. Exploded View & Internal Component Breakdown

(Cross-reference internal service components for Bobcat 12-Hole final drive assembly 6692633)

4. Frequently Asked Questions (Technical & Commercial)

For Machine Owners & Operators (C-End Insights)

Q: How do I confirm if my Bobcat 325 requires this 12-hole drive instead of the older 9-hole version? A: Count the mounting bolt holes securing the final drive casing to your machine’s track frame. If your undercarriage frame features 12 bolt holes, your machine requires this heavy-duty 6692633 (12-hole) unit.

Q: What is the vital pre-start lubrication requirement for this PHV-3B motor? A: Pre-fill the hydraulic motor casing with clean ISO VG 46 fluid through the uppermost case drain port, and fill the planetary reduction casing with SAE 80W-90 gear lubricant up to the middle level plug before starting the engine.

For Equipment Dealers & Repair Facilities (B-End Insights)

Q: Can part number 6668135 interchange directly with 6692633 on 12-hole Bobcat machines? A: Yes. Part numbers 6692633 and 6668135 represent factory engineering cross-codes for the Bobcat 12-bolt mount undercarriage, sharing identical 1134.5 cm³/rev PHV-3B displacement and 4114 N·m torque ratings.

Q: How is international shipment prepped to prevent transit damage? A: Each drive unit is internally treated with rust-inhibiting transit oil, heat-sealed in heavy-duty vapor corrosion inhibitor (VCI) poly barrier wrap, and bolted securely inside an ISPM-15 certified fumigated export wooden crate built for container and air cargo transport.

5.

Spare part