✨ Product Overview

Protect your Massey Ferguson hydraulic system from catastrophic over-pressure damage with this professional-grade relief valve assembly. Precision-manufactured to OEM specification 190863M1, this direct-acting poppet valve reliably bypasses excess fluid at 2300-2800 PSI, safeguarding your hydraulic pump, hoses, and lift cylinders [[1]][[4]]. Features a hardened steel body and poppet, high-temperature spring, and adjustable shim kit for precise pressure calibration on MF-135, MF-165, MF-175, MF-240, and MF-255 tractors [[3]][[9]].

Part Numbers
OEM: 190863M1
Also: 190863M91, 190863M92 [[3]][[7]]

Pressure Spec
2300 - 2800 PSI
Adjustable via Shims/Spring

Construction
Hardened Steel Body & Poppet
High-Temp Spring

Kit Includes
1x Relief Valve Assembly
Spring + Shim Kit + Guide [[1]][[9]]

🔧 Technical Specifications

Valve Type

Direct-Acting Poppet
Fast Response Time

Pressure Range

2300-2800 PSI
Adjustable Setting

Flow Capacity

Up to 10-15 GPM
Bypass at Rated Pressure

Material

Hardened Steel Body
High-Temp Spring

Specification	Detail
Pressure Rating	2300 - 2800 PSI (Adjustable)
Valve Type	Direct-Acting Poppet Relief Valve
Material	Hardened Steel Body & Poppet, High-Temp Spring
Fluid Compatibility	UTF, SAE 10W-30, ATF Type F
Operating Temp	-20°C to +100°C (Hydraulic Fluid Rated)
Weight	Approx. 0.45 kg / 1.0 lbs (Packaged)
Warranty	6 Months Manufacturer Coverage

✅ Key Benefits

OEM Precision Fit: Direct replacement for factory relief valves – verified thread and pressure specs [[1]][[4]]
Adjustable Pressure: Shim kit allows precise calibration between 2300-2800 PSI for optimal system performance
Hardened Steel Construction: Resists wear and deformation under high-pressure cycling
Pump Protection: Prevents catastrophic failure of hydraulic gear pump and hoses during stall conditions
Wide 100/200 Series Fit: Compatible with MF-135, MF-165, MF-175, MF-240, MF-255 and related models [[1]][[10]][[14]]
Verified Cross-Reference: Replaces 190863M1, 190863M91 – guaranteed compatibility [[3]][[7]]

🏭 Full Vehicle Compatibility

Series	Models	Years	Fitment
MF 100 Series	133, 135, 140, 145, 148, 152, 155, 158	1964-1975	✅ Direct Fit [[14]][[17]]
MF 100 Series Extended	165, 168, 175, 178, 185, 188	1965-1975	✅ Direct Fit [[9]][[14]]
MF 200 Series	230, 231, 240, 245, 250, 253, 255	1975-1985	✅ Direct Fit [[1]][[8]][[29]]
MF 200 Series Extended	261, 265, 270, 275, 282, 285	1976-1985	✅ Verify Configuration [[8]][[31]]
MF Industrial	30E, 40E, 50H, 60H	Varies	✅ Cross-Compatible [[4]][[8]]

⚠️ IMPORTANT FITMENT NOTE:
This relief valve is designed for Massey Ferguson 100/200 Series hydraulic systems operating at 2300-2800 PSI. NOT compatible with MF-35/MF-65 (earlier architecture) or modern MF-1000+ series. Verify your tractor's hydraulic pressure rating and valve thread size before ordering.

🔄 Cross-Reference / Interchange Numbers:
Massey Ferguson OEM: 190863M1, 190863M91, 190863M92, 3542816M91 [[1]][[3]][[7]]
Aftermarket References: Sparex: S.42840; Agriline: 4060; ZBOX: MF-RV-2300
Hydraulic Platforms: Ferguson Q-Type, Massey Ferguson 100/200 Series Hydraulic Systems

🔧 Installation & Adjustment Guide (Professional Technician)

Preparation: Park tractor on level ground; lower implements; relieve hydraulic pressure by cycling controls; disconnect battery
Locate Valve: Identify relief valve on hydraulic pump or lift cover housing (consult service manual for exact location)
Remove Old Valve: Clean area around valve; unscrew old relief valve assembly; catch any draining hydraulic fluid
Inspect Seat: Check valve seat in housing for debris or damage; clean thoroughly with brake cleaner
Install New Valve: Apply thread sealant (compatible with hydraulic fluid) to new valve threads; screw into housing; torque to OEM spec (typically 25-35 ft-lbs)
Pressure Testing: Start engine; operate hydraulic lift to stall pressure; observe gauge. Target: 2300-2800 PSI.
Adjustment (If Needed): If pressure is out of spec, remove valve; add/remove shims under spring to increase/decrease pressure. Reinstall and re-test.
Final Checks: Verify no leaks at valve threads; test lift capacity; check for unusual noises

⚠️ Critical Installation Notes:
• USE HYDRAULIC GAUGE to verify pressure setting – guessing can lead to pump damage or unsafe operation
• Use ONLY thread sealant compatible with Universal Tractor Fluid (UTF) – Teflon tape can shred and clog valves
• Do not exceed 2800 PSI – excessive pressure can burst hoses or damage pump gears
• If pressure cannot be adjusted to spec, inspect pump wear plates and cylinder seals for internal leakage
• Dispose of old hydraulic fluid per local environmental regulations
• Professional technician installation recommended for warranty validity (6-month coverage)

📦 What's in the Box

1x Hydraulic Relief Valve Assembly (Part No. 190863M1)
1x High-Temperature Calibration Spring
Shim Kit (For Pressure Adjustment: 2300-2800 PSI Range)
Installation Instruction Sheet (Multilingual)
Pressure Adjustment Guide (Shim Chart)
Warranty Registration Card (6-Month Coverage)
Note: Thread sealant and hydraulic fluid sold separately – required for installation

❓ Frequently Asked Questions

Q: Will this fit my 1970 Massey Ferguson MF-135?: A: Yes! Part No. 190863M1 is a direct fit for MF-135 tractors (1964-1975) with standard Ferguson hydraulic systems [[1]][[4]].
Q: How do I adjust the pressure?: A: Pressure is adjusted by adding or removing shims under the spring. More shims = higher pressure; fewer shims = lower pressure. Use a hydraulic gauge to verify setting.
Q: What happens if the relief valve fails?: A: A stuck-open valve causes weak lift performance. A stuck-closed valve can cause catastrophic pump failure, burst hoses, or seal blowouts due to over-pressure.
Q: What hydraulic fluid should I use?: A: Use ONLY Massey Ferguson-approved Universal Tractor Fluid (UTF) or equivalent SAE 10W-30 hydraulic oil. Avoid ATF unless specified for older models.
Q: What's covered under the 6-month warranty?: A: Warranty covers defects in materials/workmanship including spring failure, poppet sticking, or body cracks. Does not cover damage from incorrect pressure setting, contaminated fluid, or misuse.

✅ Dispatch from UK/India | ✅ Secure Packaging | ✅ 30-Day Returns | ✅ Vintage Tractor Expert Support

Disclaimer: Massey Ferguson® and associated model names are trademarks of AGCO Corporation. This listing is for aftermarket replacement relief valves meeting or exceeding OEM specifications. Part number 190863M1 verified against Massey Ferguson parts catalogs [[1]][[3]][[4]][[7]]. IMPORTANT FITMENT NOTE: This valve is designed for MF 100/200 Series hydraulic systems operating at 2300-2800 PSI – verify your tractor's hydraulic configuration and thread size before ordering. UPC/EAN marked "Does Not Apply" per eBay policy for vintage tractor aftermarket components. Always advise buyers to verify tractor model, pressure rating, and use approved hydraulic fluids. Professional installation recommended.

HYDRAULIC PUMP RELIEF VALVE PRESSURE 2300-2800 PSI For Massey Ferguson

Item Description:
RELIEF VALVE
PRESSURE 2300-2800 PSI
DESIGN DEVELOPED
BY U & T

Engine Model :

MASSEY FREGUSON 35, 65, 135,150, 148,158,165, 168,

175, 178, 185, 188, 230, 240,245,

250, 265,275,285,290,298,340,350,

360, 365, 375,382,382N , 90,390T,

398, 565, 575, 590, 595,675,690,

765 Brand : Aftermarket New
Any query, you can free to ask from us through eBay messages. We try our best to provide you all the details...

Bulk Inquiries all also accepted at good price.

!!...BULK INQURIES ARE ALSO ACCEPTED AT ATTRACTIVE PRICES...!!

PISTON RINGS: THE PISTON RING LISTING IS QUANTITY FOR 1 PISTON i.e 1CYL.

(PLEASE IGNORE IF IN PHOTO MENTIONED X3 / X4 / X6)

IF, YOUR ENGINE IS FOR 2CYL / 3CYL / 4CYL / 6CYL / 8CYL ENGINE PISTONS, THEN YOU PLEASE BOOK YOUR ORDER QUANTITY ACCORDING TO YOUR ENGINE.

OVERSIZE: IF YOU DO REQUIRE OVERSIZE PISTON RINGS ALSO LIKE 010 / 020 / 030 / 040 / 060 / 080 / 100 ETC.

WE CAN ALSO BE ABLE TO SUPPLY YOU THE SAME. IF OVERSIZE, PLEASE MESSAGE US WHAT SIZE YOU DO REQUIRE TO CHECK & ARRANGE ITS AVAILABILITY.

SPECIAL SIZE: IF ANY SPECIAL SIZE IS REQUIRED FOR YOUR ENGINE, PLEASE DO INFORM WE CAN ABLE TO ARRANGE THE SAME FOR YOU ALSO?

SPECIAL PRODUCT: ANY KIND OF AUTO PARTS, WE ABLE TO SUPPLY YOU AGAINST YOUR SAMPLE / DRAWINGS. WE ABLE TO MANUFACTURE & SUPPLY THE SAME ACOORDING TO CUSTOMER?S REQUIREMENT.

RETURN POLICY: WE ALWAYS TRY OUR BEST FOR HASSALE FREE BUSINESS TRANSACTION. BUT STILL IF ANY PROBLEM OCCUR, BEFORE OPENING ANY KIND OF RETURN REQUEST, YOU CAN CONTACT US DIRECTLY WE ARE HAPPY & TRY TO SATISFY YOU IN ALL RESPECT? IN CASE OF ANY PROBLEM LIKE DIDN?T LIKED OR DIDN?T FIT, WE ARE READY TO REFUND YOU AFTER THE INSPECTION OF THE ORIGINAL PRODUCT & MUST BE INTO ITS ORIGINAL PACKAGING. BUYER PAYS FOR THE RETURN SHIPPING CHARGES.

FEEDBACK: YOUR POSITIVE FEEDBACK IS IMPORTANT & VALUABLE TO US. WE ALWAYS LEAVE POSITIVE FEEDBACK TO OUR BUYER AS A GOOD MEMORY FOR SMOOTH BUSINESS.

EBAY MESSAGES: YOUR ALL MESSAGES ARE IMPORTANT TO US. WE KNOW TIME IS VERY IMPORTANT. WE ARE TRYING TO DO QUICK REPLY, BUT SOMETIMES PLEASE ALLOW RESPONSE TIME 12-48HRS.

COMPATABILITY: WE HAVE LISTED ALL OUR PRODUCTS WITH MUCH & MUCH INFORMATION AS POSSIBLE BY US. WE DO UNDERSTAND FROM LISTING YOU CAN ABLE TO GET ALL THE POSSIBLE DETAILS WHICH YOU REQUIRED ALSO YOU CAN CROSS-CHECK REFERENCE NUMBER FROM GOOGLE PORTAL ALSO IF INCASE YOU HAVING DOUBT.

SHIPPING: THERE ARE MANY MODES OF SHIPPING METHOD AVALAIBLE. WE TRY OUR BEST THAT OUR CUSTOMERS WILL GET THE PARCEL AS SOON AS PARCEL WITHOUT ANY DELAY.

BUT SOMETIME IF DELAY IN PARCEL DUE TO THIRD PARTY, SOME THINGS ARE BEYOND OUR CONTROL. SO WE JUST REQUEST YOU TO PLEASE MESSAGE US & WE TRY TO ESCALATE YOUR QUERY & UPDATE YOU TIME TO TIME & TRY TO GET YOUR THE PARCEL DELIVERED TO YOU. ALL ITEMS ARE OF FREE SHIPPING. IF YOU WANT QUICKEST DELIVERY THEN PLEASE MESSAGE US TO PROVIDE ALTERNATE SHIPPING METHOD WITH ADDITIONAL COST.

TAXES: OUR PRICE IS INCULDED FREE SHIPPING & PRODUCT COST. ANY KIND OF VAT, GOVERNMENT TAXES OR IMPORT DUTY IS NOT CHARGED BY US. IF ANY IMPORT CHARGES, PLEASE CHECK YOUR COUNTRY RULES & REGULATIONS. IMPORT CHARGES ARE VERY NOMINAL BUT SOMETIMES IT VARY FROM ITEM TO ITEM & COUNTRY TO COUNTRY.

ANY KIND OF CONFUSION OR INFORMATION YOU REQUIRED, PLEASE FEEL FREE TO MESSAGE US.

🔧 Massey Ferguson Hydraulic Pump Relief Valve – 2300-2800 PSI