Filter Elements — Quick Reference (English, No Search Tools)

Codes: V3.0520-16· V3.0934-08

Family clue: V3.xxxx format is typical V3 Series (ARGO/ARGO‑HYTOS‑style tank‑top / return‑line filter elements).

1) What the code structure usually means (field grammar)

V3 . xxxx - yy      ││││   └─ suffix (-16 / -08) = variant key      ││││       (micron/media, seal compound, bypass option, length/size variant)      └┴┴┘─ size/family number inside V3 series            0520 ≈ smaller tank‑top insert (often 146 mm class height)            0934 ≈ larger tank‑top insert (often taller/higher flow)

Safe takeaway without “searching”:

• V3.0520 and V3.0934 are different physical sizes (they do NOT interchange by “forcing it”).

  
  

• -16 vs -08 is the variant you must verify (µm + seal + whether the element itself carries a bypass).

  
  

2) 5‑Minute On‑Site Check (this is what actually locks the spec)

A) Read the housing nameplate/casting (most important)

On the filter head (the part bolted to the tank), find the stamped/plated model similar to:

• V3.0520…/ V3.0934…

  
  

• rated pressure (e.g. 10 bar/ 16 baretc.)

  
  

• port style (G1½, DN…, flange type, flow arrow)

  
  

B) Read the old element end‑cap print (second best)

You’ll often see the same V3.0520-16/ V3.0934-08, and sometimes a second line like:

• 10 µ/ 20 µ/ 25 µ…

  
  

• NBR/ FKM/ VIT/ or color clue

  
  

• sometimes a collapse rating stamped nearby (e.g. BN.../ 10 baretc.)

  
  

C) Minimum ruler check (if print is gone)

3) Replacement Rules (V3 tank‑top style)

1. Stop pump → relieve pressure (vent screw on head until oil barely weeps)

   
   

2. Unbolt the top cover (or retaining ring) — support the bowl if it’s not self‑seated

   
   

3. Lift element straight up off the center tube → check bowl bottom for bright metal shavings

   
   

4. Clean sealing faces → thin film of clean hydraulic oil on O‑ring — no Loctite / no grease

   
   

5. Seat element square on the center tube (align notch/key if present)

   
   

6. Tighten fasteners evenly → close vent → restart → confirm no seep

   
   

⚠️ If the housing has a ΔP indicator / clogging switch, replace the element before it stays in RED for long periods (return filters usually run “dirty → bypass opens” if ignored).

4) Procurement — how to write it so Stores can’t “guess”

Because -16 / -08are vendor variant keys, write it conservatively:

• V3.0520-16 — V3‑Series tank‑top element (Size 0520) — issue only against housing stamped V3.0520… — confirm micron rating + seal (NBR/FKM) from existing element label / housing nameplate before purchasing.

  
  

• V3.0934-08 — V3‑Series tank‑top element (Size 0934) — issue only against housing stamped V3.0934… — same confirmation rule.

  
  

To suppliers:

“Quote/supply V3.0520-16 / V3.0934-08 as the exact original variant called out on our housing/element label. Provide manufacturer part number, micron rating, seal compound, and collapse rating on the quote.”

One‑Line BOM (English, copy‑paste)

• V3.0520-16— V3‑Series element, Size 0520; verify µ + seal from housing/label

  
  

• V3.0934-08— V3‑Series element, Size 0934; verify µ + seal from housing/label

  
  

📸 If you want these 100% locked (µm, seal, bypass yes/no), just send:

1. housing nameplate photo (near ports/bolts) + 2) old element stood upright next to a ruler (and close‑up of end‑cap print).

   I’ll decode the suffix character‑by‑character in the same clean sheet style you’ve been using.