TM04 Sany SY35 Track Drive Motor and Travel Gearbox Assembly PHV-390-53B Suitable for SY35U SY35C

TM04 is an integrated travel hydraulic motor + planetary final drive (reduction gearbox) assembly designed for 3.5–4 ton crawler mini excavators — commonly referred to as the "travel gearbox" or "final drive." It converts hydraulic motor rotation into high-torque output through internal planetary gearing, driving the sprocket and track for machine travel.

• SANY: SY35U, SY35C, SY40, XE35
• Japanese: Hitachi ZX30 / ZX35 / ZX40, EX35 / EX40; Sumitomo 3.5–4t; Mitsubishi 3.5–4t
• Others: CAT 303.5, 331D, 328D; PC40.6, B37, 35J, TB035; also Yanmar 35, Yuchai 35, and similar models
• OEM Travel Motor Brand for SANY SY35U: NACHI

The SANY SY35U travel assembly is commonly referenced as 60167753.

The following symptoms may indicate that the final drive requires inspection or replacement:

• Slow travel speed or weak driving torque
• Travel jitter and abnormal noise during movement
• Oil leakage from the sealing surface and joints
• One side fails to travel, or the travel brake fails
• High temperature after long running periods

• Confirm the machine model before ordering
• Check the part number against your old travel assembly
• Keep the hydraulic oil clean during installation
• Replace the seal kit together if needed