Apollo 4604112083 Cylinder Seal Now Stocked for S1800-2 Paver Screed Hydraulics

APOLLO – Paverspareparts has added the Apollo 4604112083 cylinder sealing element to its stocked range of screed hydraulic parts. The seal is used in the AB600TP2 screed cylinder on the S1800-2 asphalt paver and is available from a single piece, with delivery quoted at 7 to 10 days after payment.

Hydraulic seal failures on a screed cylinder rarely begin with a breakdown. They begin with a thin film of oil on the rod. Dust sticks to that film and forms a ring at the gland, which most crews notice but few act on. A few weeks later the screed starts to creep down when the paver stands still, and the first metre of every joint comes out thin. By the time oil is visible on the screed frame, the rod may already be carrying abrasive paste past the lip.

That progression is why the sealing element is a scheduled maintenance item rather than a breakdown part. Replacing it at the weep stage costs one seal and a few hours. Replacing it after the rod is scored means a cylinder, which is an order of magnitude more expensive and usually arrives with downtime attached.

• Oil weep on the rod: a wet line or an oil-soaked dust ring at the gland.
• Screed creep: the screed loses height while the paver is stationary.
• Uneven extension: one side extends slower than the other and the crew corrects with slope control.
• Pressure loss under load: the cylinder holds position empty but sags when paving at full width.
• Hard or cracked lip: found on dismantling, typical of heat ageing rather than contamination alone.

Two or more together justify opening the cylinder. One alone is usually worth monitoring at the next service interval.

Clean the gland and rod before fitting, lubricate the new seal with system oil rather than grease, and confirm the lip faces the pressure side. Seat the seal square in the groove; a seal that goes in twisted will weep again within days and the second diagnosis usually costs more than the part. After reassembly, cycle the cylinder through its full stroke several times, then inspect the rod after the first hour of paving. If oil returns immediately, check rod straightness and bore scoring before blaming the seal.

Seals are small, cheap to store and slow to arrive when ordered in a hurry. Fleets running several S1800-2 machines typically keep two seals per machine on the shelf, since a weeping cylinder is usually found during a pre-start check rather than mid-job. Orders can be consolidated with other AB600TP2 screed parts, holders or conveyor components in one shipment to reduce freight cost per item.

APOLLO produces and exports spare parts for highway engineering machinery and equipment. The customer base covers highway construction contractors, rental fleets and direct end users, with 80 to 90 percent of output exported. The catalogue includes asphalt paver, milling machine and road roller components, supported by engineers who cross-reference OEM part numbers for customers.

For pricing, fitment confirmation or a maintenance-set quotation, contact the Paverspareparts sales team through the enquiry form on the website.