Hydraulic Bypass Element & Service Filter – Models 32/925140 & 32/925894

Two service elements from the same 32/9-series heavy-equipment parts family, covering a hydraulic bypass circuit and an air-intake main filter on adjacent JCB-platform machines. 32/925140 is a hydraulic bypass (plexu) element for JS200–330 class excavators, protecting the hydraulic return loop when the main element blocks. 32/925894 is the main external air-filter cartridge for 8025/8026/8030/8035 ZTS mini crawler excavators — included here because both share the same service-interval context on JCB jobsites and are frequently ordered together.

Key Features

• 32/925140 (Hydraulic Bypass): Plexi-reinforced cellulose/media pack, OD 195 mm / ID 40 mm / H 110 mm, bypass-duty — activates only when main return element ΔP exceeds bypass setting, protecting the loop from starvation

  
  

• 32/925894 (Air – Main): Dual-OD design (OD 87 mm / OD1 104 mm / H 266 mm), cellulose pleat, external CVA-type housing, cross to Donaldson P604557, Mann C 10 006, Luber-finer LAF4712

  
  

• Both: nitrile/NBR sealing surfaces; high-vibration end-cap bond

  
  

• 32/925894 ships with safety-element sibling 32/925895 (OD1 67 mm / H 261 mm, C 10 006 pattern)

  
  

Technical Specifications

Application Guidance

32/925140 – Bypass (plexu) element in the return-line filter head on JS200–370 class excavators. The main return element does the heavy lifting; this bypass element only sees flow when the main clogs and ΔP opens the bypass leg — hence "plexu" (plexiglass-reinforced) construction to survive intermittent high-velocity flow. Do not run without the main element — the bypass pack is coarser and not sized for continuous duty.

32/925894 – Main external air filter on 8025–8035 ZTS mini crawlers. The dual-OD (87 / 104 mm) shoulders into the CVA-type external canister mounted on the counterweight side. Pair with safety element 32/925895 inside the same housing — the safety catches any debris if the main is changed in dusty conditions.

⚠️ These are not interchangeable circuits: 32/925140 = hydraulic return bypass (JS200–330, sits in the same head as the main return element); 32/925894 = engine air intake (mini excavator, external CVA canister). Ordering the wrong one means the hydraulic head won't accept the air element and vice versa — confirm machine model + serial before ordering.

Fluid / Media Compatibility

• 32/925140: Mineral hydraulic oil (HM/HV), biodegradable esters (HEES/HETG — confirm seal), HFC water-glycol

  
  

• 32/925894: Ambient air up to 120 °C, dust/misting environments typical of mini-excavator sites (construction, landscaping, trenching)

  
  

Installation & Service

32/925140 (hydraulic bypass):

1. Depressurize return line to 0 bar; open the return-head bowl.

   
   

2. The bypass element sits in the same head as the main — lift by the center tube. Inspect the bypass spring & seat in the head (wear here causes premature bypass opening).

   
   

3. Seat new element, confirm flow arrow (tank → head), torque bowl bolts evenly.

   
   

4. Replace per main-element schedule (typically 1000–2000 h) — bypass sees little flow in normal operation, but replace together with the main to keep staging correct.

   
   

32/925894 (air main):

1. Unclip the external CVA canister on the counterweight side, lift out old main.

   
   

2. Always replace the safety element (32/925895) at the same time — it's cheap insurance against debris during main change in dusty trenching.

   
   

3. Wipe canister interior, seat new main (flow arrow outward → inward), close clips.

   
   

4. Replace every 500–1000 h depending on dust load; mini excavators on landscaping/ demolition sites foul faster — check at every 250 h visually.

   
   

Quality Notes

• 32/925140: Bypass-element media validated for intermittent high-velocity flow; plexi reinforcement prevents media unraveling when bypass leg opens

  
  

• 32/925894: Pleat bond & end-cap seal checked per batch; cross-validated to P604557 / C 10 006 dimensional standard

  
  

Ordering

Quote 32/925140 (hydraulic bypass, JS200–330, 195×40×110 mm) and/or 32/925894 (air main, 8025–8035 ZTS, 87/104×266 mm). For air service, also quote safety sibling 32/925895 (67×261 mm). Provide machine model + serial number to confirm — JS200–330 vs. 8025 ZTS are completely different platforms despite both carrying 32/9-series prefixes.

All dimensions nominal; confirm machine model (excavator JS-class vs. mini crawler) and housing type before ordering — hydraulic bypass and air-filter canisters are not cross-mountable.