HHF-1300/1600 Charging Hose of Damper 6 Parts

1

11-3161-2711-06

Rubber pipe, 6I-2500

Reinforced Synthetic Rubber (NBR) with Polyester Fiber Braid

1. High-pressure fatigue from repeated charging cycles; 2. Chemical degradation from hydraulic fluid additives; 3. Abrasion from contact with equipment or debris.

1. Avoid bending beyond minimum radius (≥8x pipe diameter); 2. Use compatible hydraulic fluids (per ISO 6743-4); 3. Inspect monthly for cracks, bulging, or wear.

2

11-3161-2711-00

Charging hose of damper

Integrated Assembly (NBR Rubber Pipe + Metal Fittings)

1. Fitting separation from pipe due to improper crimping; 2. Internal rubber degradation from fluid contamination; 3. Vibration-induced stress at connection points.

1. Avoid over-tightening fittings during installation; 2. Filter hydraulic fluid to remove particles >0.3mm; 3. Secure hose to prevent vibration during operation.

1

11-3161-2711-01

Nut, 3/4-16UNF-2B

Carbon Steel (8.8 Grade, Zinc-Plated)

1. Thread wear from repeated assembly/disassembly; 2. Corrosion from humid industrial environments; 3. Over-tightening causing thread stripping.

1. Tighten to 30-35 N·m (per ASME B18.2.2); 2. Apply anti-seize compound to threads; 3. Replace if threads are stripped or corroded.

2

11-3161-2711-02

Inlet adapter

Stainless Steel (304)

1. Thread damage from misaligned installation; 2. Corrosion from chloride-containing fluids; 3. Pressure surge-induced fatigue.

1. Align threads perfectly before tightening; 2. Avoid use with media containing >50ppm chloride; 3. Inspect for leakage after initial charging.

3

11-3161-2711-03

Adapter fitting

Stainless Steel (304)

1. Wear at fitting-pipe interface from vibration; 2. Thread corrosion from industrial fumes; 3. Over-tightening causing seal damage.

1. Use torque wrench to avoid over-tightening; 2. Clean fitting surfaces before installation; 3. Recheck connection after 50 operating hours.

1

11-3161-2711-04

Seal washer

Nitrile Rubber (NBR) with Steel Core

1. Compression fatigue from repeated tightening; 2. Chemical degradation from hydraulic fluids; 3. Damage from debris on mating surfaces.

1. Replace washer after each disassembly; 2. Ensure mating surfaces are clean and flat; 3. Avoid over-compression (per API 601).

2

11-3161-2711-05

Pipe collar

Carbon Steel (Zinc-Plated)

1. Loosening from vibration causing hose slippage; 2. Corrosion leading to reduced clamping force; 3. Over-tightening causing collar deformation.

1. Tighten to secure hose without crushing it; 2. Inspect monthly for loosening; 3. Replace if rust or deformation is visible.

What is the service life of the rubber pipe (6I-2500) under normal conditions?

Under standard industrial operating conditions (25-40°C, compatible hydraulic fluid), the rubber pipe (11-3161-2711-06) has a service life of 1,200 operating hours. For high-pressure or chemical-exposed environments, replace every 800 hours.

Can I reuse the seal washer after disassembly?

No. NBR seal washers (11-3161-2711-04) lose compression integrity after initial use, increasing leak risk. Always replace with a new washer to maintain seal performance, per API 601 leakage prevention standards.

How to prevent adapter fitting separation from the charging hose?

Ensure the adapter fitting (11-3161-2711-03) is properly crimped to the hose during installation (per manufacturer specs: 15-20 kN crimp force). Avoid excessive vibration by securing the hose with brackets and inspect connections quarterly.