Hydraulic / Lubrication Filter Items — Quick Reference (English)

Items: RTE80D10B· 3970GGCB18

1) RTE80D10B— Return-Line Filter Element

What it is

A disposable pleated filter element installed in a pipe-mounted return canister (clamp-band bowl, flow arrow on the head). Oil has passed through the actuators and is heading back to tank — this element guards tank cleanliness.

Reading the code pattern (field-level, not brand-specific):

• RTE = return-line / low-pressure canister family

  
  

• 80 = size/flow class (fixes OD, height, centre-tube dimensions)

  
  

• D10 = ~10 µm filtration grade (beta-rated glass-fiber/synthetic, disposable)

  
  

• B = bypass / seal variant — on many RTE-style cans, "B" can indicate NBR seal (Buna-N, black/dark grey) and/or an integral bypass ~3 bar in the element. Confirm by the old O-ring colour and the housing nameplate.

  
  

What to check before fitting

• Read the filter head nameplate near the pipe ports: should show the RTE80… model, pressure bar (return class, often ~10–25 bar), port size, and a FLOW ARROW.

  
  

• Ruler-check: new element height / OD / centre-hole matches the old one.

  
  

• O-ring colour: if "B" = NBR → black/dark grey. If the old seal is brown/red, stop — you may need the Viton variant, not a "B" spare.

  
  

Replacement steps

1. Stop pump → vent/bleed until pressure = 0.

   
   

2. Support the bowl — don't let it hang on piping.

   
   

3. Clamp off → pull element straight out → check bowl bottom for bright metal shavings (wear warning).

   
   

4. Wipe seal lands → thin film clean hydraulic oil on O-ring (no grease).

   
   

5. Seat element square on centre support tube → close vent slowly → ΔP indicator green, no seep.

   
   

Procurement wording (safe)

"RTE80D10B — Return-line element for RTE80-family housing (D10 ≈ 10 µm, B = bypass/variant). Confirm against head nameplate; require supplier to state OD / height / centre bore / seal compound before delivery. No 'looks the same' substitute."

2) 3970GGCB18— Internal Stock / Material Number (Needs Verification)

What it is

A plant stock/material number (ERP/bin number). The digits alone don't tell you micron rating, seal type, or dimensions — the only safe authority is the filter housing (or equipment) it belongs to.

How to qualify it (one minute)

• Check the bag/bin label (or BOM line): does it say "element / cartridge", or "seal kit / repair kit / O-ring kit / assembly"?

  
  

• If it is an element: carry it to the filter, read the housing nameplate (model + ports + pressure + flow arrow), and ruler-check height / OD / centre-hole against the old element.

  
  

• If it is a kit/assembly: use it only for the equipment the BOM states — not as a filter element.

  
  

Procurement wording (safe)

"3970GGCB18 — Internal stock/material No. — issue against the equipment tag / housing model written in the BOM. If supplier delivers an element, require housing model + OD + height + seal compound first; if a seal/repair kit or assembly, issue only that specified item."

3) One-Line BOM (copy-paste)

• RTE80D10B— Return-line canister element, RTE80 family (~10 µm, B variant), fits RTE80 head nameplate only — check O-ring colour (B usually = NBR black/grey; verify)

  
  

• 3970GGCB18— Internal stock/material No. — confirm from housing nameplate / bin tag whether element, kit, or assembly before use

  
  

Field rule (same as always)

The metal nameplate on the filter head decides everything, not the sticker on the box.

If paint hides it, stand the old element upright, put a ruler against it, and write H = ___mm / OD = ___mm on the BOM line — that makes both spares idiot-proof without any brand name.