MCA-PH Coupler Set is a hook and yoke structural style can be coupling by manual, mainly used on the locomotive, passenger, wagon railway. The highest using speed of MCA-PH Coupler Set can be up to 80km/h.
Also known as Norwegian Conversion Double Articulated, Chopper, Jones, Yoke couplers.
Similar but incompatible with ABC couplers
Wide use on Narrow Gauge stock in Europe, Africa, Asia-Myanmar, India, Bangladesh and British.
Semi-Auto Coupling; Manual Decoupling
Application
MCA-PH Coupler Set is a hook and yoke structural style can be coupling by manual, mainly used on the locomotive, passenger, wagon railway. The highest using speed of MCA-PH Coupler Set can be up to 80km/h.
Main Structure
Coupler (MCA-PH) Hook ending with lifting gear:
| No | Name | Material | Requirement |
| 1 | Hook | 40Cr | |
| 2 | Column | ZG230-450 | |
| 3 | Link pin(2) | 25MnCrNiMoA | Pinrod’ssurfaceisheat-treated,hardnessis40-55HR |
| 4 | Backseat | AAR-M201-C | GeneraltolerancesofcasingsizeisaccordingtoGB/T6414-CT11,othersisaccordingtoTB/T1464-91 |
| 5 | Buffer Spring | 60Si2CrVAT | |
| 6 | Pad | Q235 | |
| 7 | Draft key | 25MnCrNiMoA | No for ging defects such as crack,temp ering and quenching treat ment,32HRC-44HRC;Forgingsurfacepolishsmooth,angularneedsabate. |
| 8 | Flat pin | Q235-A | |
| 9 | Hex lock nut | 45 | Tempering24-29HRC,height:79.5/63.5mm,D-valueisgroovedepth.M52screwthread |
| 10 | Inside castion | AAR-M201-C | |
| 11 | Hook bolt | 25MnCrNiMoA | |
| 12 | Hook body | AAR-M201-B | |
| 13 | Cotter special | Q235-A | |
| 14 | Washer | 65Mn | |
| 15 | Colomn rivet | Q235-A |
Coupler (MCA-PH) Yoke ending with lifting gear:
| No | Name | Material | Requirement |
| 1 | Slipper | ZG230-450 | MaterialStandard:TB/T1464-91 |
| 2 | Link pin(1) | 25MnCrNiMoA | |
| 3 | Link pin(2) | 25MnCrNiMoA | Pinrod’ssurfaceisheat-treated,hardnessis40-55HRC |
| 4 | Backseat | AAR-M201-C | GeneraltolerancesofcasingsizeisaccordingtoGB/T6414-CT11,othersisaccordingtoTB/T1464-91 |
| 5 | Buffer spring | 60Si2CrVAT | 202.5mmisworkingcondition,cylindernumber:N=7.2,effectivecylindernumber:N=5.7,maximumcondenselength:179mm,freelength:235mm(1312N/mm),material:60SiZCrVAT,heat-treated:42-48HRC |
| 6 | Pad | Q235 | Noforgingdefectssuchascrack,temperingandquenchingtreatment,32HRC-44HRC;Forgingsurfacepolishsmooth,angularneedsabate. |
| 7 | Draft key | 25MnCrNiMoA | |
| 8 | Inside casting | AAR-M201-C | |
| 9 | Yoke body | AAR-M201-B | |
| 10 | Link | AAR-M201-C | |
| 11 | Link pin(3) | 25MnCrNiMoA | |
| 12 | Coupling block | 25MnCrNiMoA | |
| 13 | Screw | 40Cr | |
| 14 | Screw handle | Q235-A | |
| 15 | Yoke nut | 40Cr | |
| 16 | Yoke | 25MnCrNiMoA | |
| 17 | Hex lock nut | 45 | Tempering24-29HRC,height:79.5/63.5mm, D-valueisgroovedepth.M52screwthread |
| 18 | Flat pin | Q235-A | |
| 19 | Cotter special | Q235-A | |
| 20 | Washer | Q235-A、65Mn | |
| 21 | Column rivet | Q235-A |
Installment Requirement
Coupler (MCA-PH) Hook ending with lifting gear:
Size from hook end to center of link pin: 298±3
Size from center of link pin to draft key end: 787±5
Hook’s rotation is in good condition and no binding.
No lack of welding line’s surface.
Each pin’s installment direction is correct.
Coupler (MCA-PH) Yoke ending with lifting gear:
Size from yoke body end to center of link pin: 362±3
Size from center of link pin to draft key end: 787±5
No binding of coupling block,yoke nut and screw with screw thread’s rotation.
No lack of welding line’s surface.
Each pin’s installment direction is correct.
Painting and Lubrication
Hole, screw thread, pin and other rotation place are all painted by calcium base grease.
Surface’s paint is even, no lack.
Maintenance
Dairy maintenance and no special tools, lubricate at fixed period, visual check.
Check hook’s important components whether appear clacking and wear limit. Including axle pin assembly, hook,column, draft key, hook bolt, hook body and so on.
Check yoke’s important components whether appear clacking and wear limit. Including slipper, draft key, yoke body, link, coupling block, screw, screw handle, yoke nut, yoke and so on.
Check hole, screw thread, pin and other rotation place are in good lubrication condition.
Packaging
To prevent from mechanical damage, coupler should use special container or user specified way of packing during transport. Especially coupler’s important structural positions should be take effective protective measure in advance.
WA-27: COUPLER HOOK, END WITH LIFTING GEAR
WA-28: COUPLER YOKE, END WITH LIFTING GEAR
