BAUER A-JuniorII-F4-a1 Maintenance Kit

BAUER A-JuniorII-F4-a1 Maintenance Kit for Junior II High-Pressure Breathing Air Compressors

The BAUER A-JuniorII-F4-a1 Maintenance Kit is an original equipment manufacturer (OEM) scheduled 500-hour preventive servicing kit engineered specifically for the 3-stage high-pressure BAUER Junior II breathing air compressor block. Designed to preserve air purity and operating pressures up to 330 bar (4,780 psig), this kit contains all critical mechanical sealing elements, high-pressure elastomer O-rings, cylinder head sealing rings, and intake filtration components required to execute scheduled valve overhauls and stage re-sealing.

Routine replacement using genuine BAUER parts mitigates inter-stage blow-by, carbon fouling on valve plates, crankcase contamination, and final-stage pressure drops, keeping equipment compliant with stringent DIN EN 12021 and CGA Grade E breathing air delivery standards.

Model Details

• Manufacturer: BAUER KOMPRESSOREN GmbH
• Kit Model Reference: Junior II-F4-a1 (500-Hour / Annual Service)
• Manufacturer Part Number (MPN): A-JuniorII-F4-a1
• Alternate SKU / EDP Number: 3004670806
• OEM Cross-References: BAUER A-JUNIORII-F4-A1, Edmac 3004670806
• Complementary Service Level: A-JuniorII-F4-AB1 (1000-Hour Extended Overhaul Kit)

Technical Specifications

Features

1. Genuine OEM High-Pressure Sealing Media: Pre-formed, high-durometer fluoropolymer/FKM O-rings designed to endure localized temperatures exceeding 160°C across 1st, 2nd, and 3rd compression stages.
2. Complete Valve Servicing Scope: Comprehensive set of gaskets, seating rings, and copper washers to service suction and pressure valves across all three cylinder heads without machining.
3. Contaminant Defense Intake Element: Includes precision micronic intake air filter cartridge to prevent atmospheric micro-particulates and salt aerosols from scoring aluminum cylinder linings.
4. Blow-by & Leak Prevention: Restores intermediate inter-stage pressures (Stage 1 ~6 bar, Stage 2 ~45 bar, Stage 3 up to 225/330 bar) to factory delivery tolerances.
5. Direct Drop-In Compliance: Eliminates dimensional mismatches and improper unloader seating common with non-OEM aftermarket gaskets.

Equipment Compatibility

• BAUER Junior II-B (Subaru/Kohler/Honda 4-stroke gasoline drive engine)
• BAUER Junior II-E (Three-phase 230/400/460 VAC, 50/60 Hz electric motor)
• BAUER Junior II-W (Single-phase 115/230 VAC, 50/60 Hz electric motor)
• BAUER Junior II Yachting Package / Navy Spec (Block variants equipped with P21/P0 filtration systems)

Applications

• Commercial Marine & Offshore Vessels: Onboard dive-support compressors, emergency crew breathing apparatus (EEBD) recharging systems, and workboat service stations.
• Professional Diving Operations: SCUBA cylinder filling stations for technical diving centers, search & rescue boats, and naval support units.
• Firefighting & Emergency Response (SCBA): Mobile filling stations for self-contained breathing apparatus deployed by municipal and industrial fire brigades.
• Industrial High-Pressure Gas Testing: Pneumatic laboratory test benches, valve test cells, and clean high-pressure air distribution systems.

Frequently Asked Questions

What components are included in the BAUER A-JuniorII-F4-a1 maintenance kit?

The A-JuniorII-F4-a1 kit provides all wear parts needed for a 500-hour or annual service on a Junior II block. It includes a primary intake air filter element, complete suction and discharge valve sealing sets, cylinder head copper crush washers, and high-temperature O-rings across all three compression stages.

How often should the BAUER Junior II 500-hour kit be installed?

BAUER recommends installing this kit every 500 operational run hours or at least every 12 months, whichever occurs first. In high-humidity marine conditions or emergency rescue deployments, annual replacement ensures valve springs and seals remain free from salt corrosion and lacquer buildup.

Can the A-JuniorII-F4-a1 kit be used on both 225-bar and 330-bar models?

Yes. The valve gaskets, sealing washers, and head O-rings in this kit are rated for the full pressure envelope of the Junior II block, which supports both PN 200 (225 bar) and PN 300 (330 bar) final-pressure configurations.

What is the difference between maintenance kit A-JuniorII-F4-a1 and A-JuniorII-F4-AB1?

The A-JuniorII-F4-a1 is a 500-hour preventive maintenance kit focused on valve inspection, sealing renewal, and intake filtration. The A-JuniorII-F4-AB1 is an extended 1000-hour overhaul kit that includes deeper wear components such as piston rings, guide bands, and heavy-duty mechanical valve internals.

Does this kit include the P21 breathing air purification cartridge?

No. Purification cartridges (such as the P21 Triplex cartridge) are consumable chemical filtration items replaced based on run hours and ambient temperature. The A-JuniorII-F4-a1 kit supplies mechanical compressor block seals, gaskets, and the mechanical intake air filter.