ST-4125D/ST-6125D — MAINTENANCE

LUBRICATION

To check the oil level of the mechanical seal perform the following:

1.Lay the pump (Figure 17) on its side with the oil plug facing upwards.

2.Remove oil fill plug.

3.Visually inspect oil plug hole to verify that oil cavity is full enoughtocoversealspring.Checkevery300hours,change hydraulic oil every 6 months (1,000 hours) or as needed.

4.While checking the hydraulic oil level, also check the condition of the hydraulic oil in the seal cavity . Block the opening with a finger and roll pump to one side to drain oil into a small transparent container.If oil is cloudy or has water in it, drain oil from pump cavity and replace hydrau- lic oil. Check the seal for wear damage.

5.If oil level is low fill with SAE 10 weight non-detergent hydraulic oil (i.e.ShellTurbo 32 or equivalent). Fill oil cavity 75% to 85% full (allow air space for expansion). Pump oil cavity capacity is approximately 180 cc.

IMPELLER

1.Make sure the clearance between the impeller and the friction disk is approximately .012 - .020 inches (.304 - .508 mm.)

2.Ifimpellerisdefectiveorbadlyworn,replaceimpellerimme- diately.

LAY PUMP FLAT

ON ITS SIDE

REMOVE FILL PLUG, AND VISUALLY INSPECT THAT OIL CAVITY IS FULL ENOUGH TO COVER SEAL SPRING. FILL TO 75-80% CAPACITY (APPROXIMATELY 180 CC.)

FILL WITH 10 WEIGHT NON- DETERGENT HYDRAULIC OIL. USE SHELL TURBO 32 OR EQUIVALENT.

CHECK HYDRAULIC OIL EVERY 300 HOURS. CHANGE EVERY 6 MONTHS OR AS NEEDED.

Figure 17. Checking Hydraulic Oil

PAGE 22 — ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08)

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Belkin ST4125D, ST6125D manual ST-4125D/ST-6125D Maintenance
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ST6125D, ST4125D specifications

Belkin is renowned for producing high-quality networking and connectivity solutions, and their ST4125D and ST6125D models exemplify this commitment. The ST4125D is a 4-port USB hub, while the ST6125D serves as a versatile 6-port USB hub, both designed to enhance productivity and connectivity for users, especially in environments where multiple devices are used simultaneously.

One of the main features of the Belkin ST4125D and ST6125D is their ability to expand USB connectivity effortlessly. Each hub allows users to connect multiple devices to a single USB port, which is particularly useful for laptops and desktops that have limited ports. The ST4125D features four USB 3.0 ports, while the ST6125D includes six, making them perfect for connecting printers, external hard drives, and other peripherals without having to switch devices.

Another significant technology integrated into both models is USB 3.0, which offers data transfer speeds of up to 5 Gbps. This high-speed performance not only ensures rapid file transfers but also improves efficiency when moving large volumes of data. The backward compatibility with USB 2.0 devices also ensures that users can connect older peripherals without any issues, making these hubs highly versatile.

The design of the ST4125D and ST6125D hubs promotes convenience and ease of use. Their compact and lightweight form factor makes them portable, ideal for both home and office environments. Additionally, the hubs feature individual power switches for each port, granting users control over power management and enhancing energy efficiency.

Furthermore, both models boast an LED indicator for power status, providing real-time feedback to users. They also come equipped with a sturdy build quality, ensuring longevity and durability even with regular use. With plug-and-play functionality, setting up the hubs is hassle-free, requiring no additional drivers or software installation.

In conclusion, both the Belkin ST4125D and ST6125D USB hubs present excellent solutions for anyone seeking enhanced connectivity options. With their combination of speed, functionality, and user-friendly features, they are a valuable asset in today’s increasingly device-driven world. Whether for personal use, home offices, or larger business settings, these hubs stand out as reliable tools that meet diverse connectivity needs effectively.
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