Apollo 2011672 Conveyor Gearbox Scraper Reducer High Torque Sealed Transmission Part for S1800-2 S1600-2 Asphalt Pavers

Apollo 2011672 Conveyor Gearbox Scraper Reducer (2259433) for S1800-2 / S1600-2 Pavers

The conveyor drive on an asphalt paver works in the worst possible location: low on the machine, close to the ground, wrapped in hot aggregate dust and constantly hit by vibration from the screed and the conveyor chain. The Apollo 2011672 scraper reducer (cross-reference 2259433) is the gear unit that converts motor speed into the torque needed to pull that chain evenly while the hopper is loaded.

This listing covers the steel-bodied reducer as a direct replacement for S1800-2 and S1600-2 paver conveyor drives. It is supplied as a complete unit, so a workshop can swap the gearbox instead of rebuilding bearings and seals on site.

Failure Symptoms That Point to the Gearbox

Before ordering a reducer, confirm the fault is inside the gear unit rather than in the chain, the motor or the drive coupling. These symptoms are the usual indicators:

• Conveyor stalls under load — chain slows or stops when the hopper is full, yet the chain itself is correctly tensioned.
• Metal particles in the oil — grey sludge or sparkle on the drain plug means gear or bearing wear.
• Oil weeping at the output shaft — seal failure lets abrasive dust into the housing, and wear accelerates quickly afterwards.
• Rising housing temperature — a reducer that runs noticeably hotter than the opposite side is a warning sign.
• Rhythmic noise or whine — consistent with a damaged gear tooth rather than a loose chain.

Design Points That Matter on a Paver

• High torque output — sized to move a loaded conveyor chain without stalling on grade or during start-up.
• Sealed construction — dust and moisture exclusion is the single biggest factor in reducer life on paving sites.
• Compact housing — fits the restricted space under the hopper without reworking mounts.
• Steel body — rigid enough to hold gear alignment under vibration and shock loading.
• Serviceable unit — drained, refilled and refitted as a whole, cutting machine downtime to a single shift.

Technical Specification

Fitting Notes for the Workshop

Drain the old unit before removal and keep the drained oil for inspection — it tells you whether the failure was wear or contamination. Check the drive coupling and chain tension while the reducer is out; a misaligned coupling will destroy a new gearbox within weeks. Refill to the specified level, run the conveyor unloaded for a few minutes, then re-check for weeping at the shaft seals.

Compatibility Check and Ordering

Send the machine model, serial number and a photo of the existing reducer nameplate before ordering. The reference will be confirmed against 2011672 / 2259433, and the order can be combined with other conveyor and screed parts for the same shipment.

Request a quote today and keep your paver's conveyor drive running at full rate.