ZF 4699.172.009 CHAIN TENSIONER | OEM Genuine Part

Overview

This genuine ZF 4699.172.009 CHAIN TENSIONER is a critical hydraulic component designed to maintain precise tension on the drive chain within ZF heavy-duty construction machinery transmissions. Located in the upper gear train assembly, it prevents slack that can lead to timing irregularities and mechanical noise. The SKU 4699.172.009 is engineered to OEM specifications, ensuring a perfect fit and long service life in demanding off-highway applications. It works in concert with the 4699101002: HOUSING to maintain proper lubrication flow and chain alignment.

Symptoms of Failure

• Chain rattle or slapping noise during acceleration: A worn tensioner fails to dampen chain vibration, producing a metallic clatter from the transmission housing.
• Irregular gear engagement or slipping: Loss of chain tension causes misalignment with the 4699102010: INPUT and 4699103002: OUTPUT shafts, leading to intermittent power transfer.
• Hydraulic fluid contamination: Internal seal degradation allows debris into the oil circuit, often detected during routine filter inspections.
• Visible oil seepage around the tensioner body: External leaks indicate the piston seal has failed, requiring immediate replacement to avoid pressure loss.

Technical Specifications

Compatibility

This chain tensioner is primarily compatible with ZF WG180 and WG200 series powershift transmissions used in wheel loaders, graders, and compactors. It also fits select models in the ZF 4WG-200 and 6WG-200 families. For proper installation, ensure the 4699004010: GK25LD gear kit is inspected simultaneously, as worn gears accelerate tensioner wear. Always replace the tensioner when rebuilding the upper chain drive assembly.

Related Components