| Parameter | Details |
|---|---|
| Product Name | Oil Filter Pressure Switch |
| Part Number | RE212878 |
| Compatible Brands | John Deere |
| Compatible Tractor Models | 6105M, 6105R, 6110, 6210, 6310 |
| Material | Iron + Rubber + Brass |
| Packing | PP bag inside, carton box outside |
| Payment Terms | Western Union, L/C, T/T, MoneyGram, D/A, D/P |
| MOQ | Acceptable trial order (1 piece accepted) |
| Shipping Mode | By air, by sea, by express (FedEx, UPS, DHL, TNT, etc.) |
| Place of Origin | Guangdong, China |
| Brand Name | COGENG |
| Certification | ISO9001 |
| Stock Status | ✅ In Stock |
| Supply Capacity | 500 PCS |
The COGENG RE212878 Oil Filter Pressure Switch is a high-quality, direct OEM replacement switch specifically designed for John Deere 6105M, 6105R, 6110, 6210, and 6310 tractors. This critical component monitors oil filter differential pressure and activates a warning light or signal when the oil filter becomes restricted or clogged.
Unlike an engine oil pressure sensor which measures absolute oil pressure in the engine gallery, an oil filter pressure switch monitors the pressure drop across the oil filter element. When the filter becomes clogged with contaminants, the pressure difference between the filter inlet and outlet increases. This switch activates at a preset differential pressure (typically 15–25 PSI), alerting the operator that the oil filter needs replacement – even if the engine oil pressure appears normal.
This function is vital for:
Preventing engine damage – Bypass valve opens, allowing unfiltered oil to circulate
Extending engine life – Clean oil reduces wear on bearings, pistons, and turbocharger
Reducing maintenance costs – Timely filter replacement prevents expensive repairs
Protecting sensitive components – Common rail injectors and hydraulic lifters require clean oil
Manufactured under ISO9001 certified processes, the COGENG RE212878 features a durable iron/brass housing, premium rubber seals, and precision internal components to withstand the demanding environment of agricultural operations – constant vibration, temperature extremes (-40°C to +125°C), and exposure to engine oil, diesel fuel, and debris.
Why Choose COGENG RE212878?
| Feature | Benefit |
|---|---|
| ✅ Direct OEM Replacement | Plug-and-play for John Deere 6M/6R series |
| ✅ Monitors Oil Filter Condition | Alerts when filter restriction occurs |
| ✅ Prevents Bypass Valve Operation | Ensures oil stays filtered |
| ✅ Durable Construction | Iron/brass housing – no plastic |
| ✅ Leak-Proof Design | Premium rubber seal pre-installed |
| ✅ Single Terminal Design | Easy to connect to existing wiring |
| ✅ In Stock | Ready to ship immediately |
| ✅ ISO9001 Certified | Consistent quality you can trust |
| Component Name | Quantity | Description |
|---|---|---|
| Oil Filter Pressure Switch | 1 | Complete assembly, ready to install |
| Rubber / Copper Sealing Washer | 1 | Pre-installed on threaded base |
| Protective Plastic Cap | 1 | For shipping protection only |
| Installation Quick Guide | 1 | Basic instructions |
Exploded View Description:
| # | Component | Material | Function |
|---|---|---|---|
| 1 | Terminal | Brass/Steel | Connects to warning light wire |
| 2 | Insulator | Plastic/Ceramic | Prevents short to ground |
| 3 | Pressure Diaphragm | Nitrile rubber | Senses pressure difference |
| 4 | Spring | Steel | Sets activation pressure threshold |
| 5 | Moving Contact | Copper/Silver | Makes/breaks electrical circuit |
| 6 | Fixed Contact | Copper/Silver | Completes circuit to ground |
| 7 | Housing | Brass/Iron | Mechanical protection |
| 8 | Sealing Washer | Rubber/Copper | Prevents oil leaks |
This oil filter pressure switch is specifically designed for the following John Deere tractors:
| Model | Series | Engine | Typical Year Range |
|---|---|---|---|
| John Deere 6105M | 6M Series | John Deere PowerTech 4.5L | 2012–Present |
| John Deere 6105R | 6R Series | John Deere PowerTech 4.5L | 2012–Present |
| John Deere 6110 | 6010 Series | John Deere PowerTech 4.5L / 6.8L | 2002–2007 |
| John Deere 6210 | 6010 Series | John Deere PowerTech 6.8L | 2002–2007 |
| John Deere 6310 | 6010 Series | John Deere PowerTech 6.8L | 2002–2007 |
Additional compatible models (verify before purchase):
| Model | Compatibility Level | Notes |
|---|---|---|
| John Deere 6105D | ✅ Compatible | Similar engine family |
| John Deere 6115M | ✅ Compatible | Same filter housing |
| John Deere 6120R | ✅ Compatible | Same filter housing |
| John Deere 6130M | ✅ Compatible | Same filter housing |
| John Deere 6140R | ✅ Compatible | Same filter housing |
| John Deere 6170R | ⚠️ Similar | Check filter housing |
| John Deere 6200 | ⚠️ Similar | Older model – verify |
| John Deere 6400 | ⚠️ Similar | Older model – verify |
Important: The oil filter pressure switch is typically mounted on or near the oil filter housing. This switch works on John Deere PowerTech engines (4.5L and 6.8L) used in 6M, 6R, and 6010 series tractors.
| Parameter | 6105M / 6105R | 6110 / 6210 / 6310 |
|---|---|---|
| Engine | PowerTech 4.5L (4-cyl) | PowerTech 6.8L (6-cyl) |
| Horsepower | 105 HP | 110 / 210 / 130 HP |
| Transmission | PowrQuad, AutoQuad | PowerQuad, AutoQuad |
| Hydraulics | 25–30 GPM | 25–30 GPM |
| Electrical system | 12V | 12V |
Oil Filter Differential Pressure Specifications:
| Condition | Differential Pressure | Switch Status |
|---|---|---|
| Clean oil filter (new) | 2–5 PSI (0.14–0.35 bar) | Open – Light OFF |
| Partially clogged filter | 10–15 PSI (0.7–1.0 bar) | Open – Light OFF |
| Clogged filter (warning activates) | 15–25 PSI (1.0–1.7 bar) | Closed – Light ON |
| Filter bypass valve opens | 25–30 PSI (1.7–2.1 bar) | Closed – Light ON |
| Brand | Part Number | Notes |
|---|---|---|
| COGENG | RE212878 | Direct replacement |
| John Deere (OEM) | RE212878 | Original equipment |
| John Deere (alternate) | RE212879 | Updated version (verify) |
| Aftermarket | F663 | Similar (verify) |
| Aftermarket | 843784 | May vary |
| Parameter | 6105M / 6105R | 6110 / 6210 / 6310 |
|---|---|---|
| Oil filter type | Spin-on (full flow) | Spin-on (full flow) |
| John Deere filter part # | RE504836 | RE504836 |
| Bypass valve setting | 25–30 PSI | 25–30 PSI |
| Recommended oil viscosity | 15W-40 | 15W-40 |
| Oil change interval | 250–500 hours | 250–500 hours |
When to replace the oil filter:
Every engine oil change (recommended)
When oil filter warning light illuminates (switch may be faulty)
At specified service intervals in operator's manual
Q1: What is the difference between an oil pressure switch and an oil filter pressure switch?
A:
| Feature | Oil Pressure Switch | Oil Filter Pressure Switch |
|---|---|---|
| What it measures | Absolute oil pressure in engine | Differential pressure across filter |
| What it indicates | Low oil pressure | Clogged oil filter |
| Mounting location | Engine block | Oil filter housing |
| Activation cause | Oil pump failure, low oil level | Restricted filter element |
| Warning light | "Low Oil Pressure" | "Change Oil Filter" |
The RE212878 is an OIL FILTER PRESSURE SWITCH – not the main engine oil pressure switch.
Q2: What are the symptoms of a failing oil filter pressure switch on a John Deere tractor?
A: Common signs include:
Oil filter warning light stays on even with a new oil filter
Oil filter warning light never comes on (bulb test fails)
Warning light flickers intermittently
Oil leak from switch body or base
Warning light comes on too early (with clean filter)
No warning light at all (bulb could be burned out – check first)
Q3: How do I test if my oil filter pressure switch is bad?
A: Perform these checks:
Test 1 – Warning light function:
Turn key to ON (do not start engine)
Oil filter warning light should come ON briefly (bulb test)
Start engine – light should turn OFF within a few seconds
Test 2 – Continuity test (switch removed):
Remove switch from filter housing
Use multimeter on continuity setting
With no pressure: Should show no continuity (open)
Apply light pressure (air or finger): Should show continuity (closed)
Q4: Why does my oil filter warning light come on even with a new oil filter?
A: Possible causes:
Faulty switch (stuck closed)
Wire shorted to ground (inspect wiring)
Wrong oil viscosity (too thick – check manual)
Oil filter restriction (defective filter element)
Oil bypass valve stuck (internal engine issue)
Q5: Is this a genuine John Deere OEM part?
A: No. This is a COGENG aftermarket replacement manufactured to meet or exceed OEM specifications. It is a direct replacement for John Deere part number RE212878.
Q6: Will this switch fit my John Deere 6105M?
A: Yes – this switch is specifically designed for the 6105M.
Q7: Will this switch fit my John Deere 6105R?
A: Yes – this switch is specifically designed for the 6105R.
Q8: Will this switch fit my John Deere 6110, 6210, or 6310?
A: Yes – this switch fits all three 6010 series models.
Q9: What is the activation differential pressure?
A: The switch typically activates (closes to ground) at 15–25 PSI (1.0–1.7 bar) differential pressure across the oil filter element.
Q10: Is this switch normally open or normally closed?
A: This switch is normally open (N.O.) – meaning the switch is open (light OFF) when differential pressure is low (clean filter), and closes (light ON) when differential pressure exceeds the threshold (clogged filter).
Q11: Is this switch in stock for immediate shipping?
A: Yes – COGENG maintains stock of 500+ units. Orders ship within 24–48 hours.
Q12: What is the warranty?
A: COGENG provides a 6-month warranty against manufacturing defects.
Q13: How long does shipping take?
A:
Express (DHL/FedEx/UPS/TNT): 3–7 business days worldwide
Air freight: 7–12 days
Sea freight: 20–40 days
Q14: Do I need any special tools to install this switch?
A: No. A standard wrench (19–24mm) is all you need.
Q15: Do I need to use thread sealant?
A: No – the sealing washer provides the oil seal. Do not use PTFE tape – it can interfere with the switch's ground path.
Q16: Can I install this switch myself?
A: Yes, with basic mechanical skills (10–15 minutes). If uncomfortable, professional installation is recommended.
Q17: How do I place a trial order?
A: Contact your COGENG distributor directly. MOQ is 1 piece for trial orders – we welcome first-time buyers.
| Order Option | Details |
|---|---|
| Minimum Order Quantity (MOQ) | 1 piece (trial order accepted) |
| Stock Status | ✅ 500+ pieces in stock |
| Lead Time | Ships within 24–48 hours |
| Payment Methods | Western Union, L/C, T/T, MoneyGram, D/A, D/P |
| Shipping Methods | FedEx, UPS, DHL, TNT, air freight, sea freight |
| Packaging | PP bag inside, carton box outside |
How to Order in 3 Simple Steps:
| Step | Action |
|---|---|
| 1️⃣ | Send inquiry with your John Deere model (6105M, 6105R, 6110, 6210, or 6310) |
| 2️⃣ | Confirm engine type (PowerTech 4.5L or 6.8L) |
| 3️⃣ | Place order – we send invoice + tracking number within 24 hours |
*Shipping Details Delivery Return*
Sales Price:
The displayed price is for reference only. Please contact COGENG sales support for the exact price.
Shipping Method:
Sea, land, or air transport; the specific method is determined based on the nature of the shipment.
Estimated Delivery Time:
Based on the dispatch time from the logistics carrier; the displayed arrival time serves as the reference.
Contact information is provided at the bottom of the page.
Merchant Return Policy:
Products shipped are not eligible for return or exchange.
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