PTO Shaft for New Holland Discbine & Case IH Disc Mower Series
Replacement PTO shaft for New Holland Discbine 1431, 1432, 411, H7220–H7560 & Case IH DC 132 disc mowers. 55N CV joint, 540/1000 rpm, precision spline fit.
Agricultural PTO Driveline for New Holland & Case IH Disc Mowers
This PTO shaft assembly is engineered to transfer rotational power from the tractor output to New Holland Discbine and Case IH disc mower gearboxes. Built around the 55N-series constant-velocity (CV) joint platform, the driveline maintains uniform angular velocity at operating angles up to 80 degrees, reducing vibration and extending component life across 540 rpm and 1000 rpm applications.
Each agricultural PTO driveline in this range is a direct-fit replacement for OEM Weasler and Bondioli & Pavesi units. Telescoping tubing allows length adjustment for different tractor-implement setups, while precision-ground spline profiles (1.375" x 21 spline, 1.750" x 20 spline, or 1.5" x 23 spline) ensure zero-backlash engagement with both tractor and implement ends.
Compatible Disc Mower Models
Our PTO shaft fits the following New Holland Discbine and Case IH disc mower models. Each model uses multiple PTO shafts paired with a combination clutch; shaft types and clutch locations vary by model.
| Brand | Model Series |
|---|---|
| New Holland Discbine | 1431, 1432, Model 411, 1409, 1410, 1411, 1412, 1441, 1442 |
| New Holland Discbine H-Series | H7220, H7230, H7320, H7330, H7450, H7460, H7550, H7560 |
| Case IH | DC 132 |
PTO Shaft Part Numbers & Spline Specifications
Use the tables below to identify the correct PTO shaft for your New Holland Discbine 1431 disc mower, Model 411, 14XX-series, or H-series unit. All models were originally equipped with Weasler or Bondioli & Pavesi drivelines; each part listed below is a precision replacement.
New Holland Discbine 1431, 1432 & Model 411
| Part Number | Tractor End | Implement End | Description |
|---|---|---|---|
| 14656853 | 1.375"-21 spline | 1.5" x 23 spline | 55N 80x50 Double CV — full driveline assembly |
| 82-14656853 | — | 1.5" x 23 spline | 55N 50-degree CV half (implement side) |
| 83-14656853 | 1.375"-21 spline | — | 55N 80-degree CV half (tractor side) |
| 83-14756853 | 1.750"-20 spline | — | 55N 80-degree CV half (tractor side) |
| 857-5521 | — | 1.375"-21 spline | 55N 50-degree CV clamp yoke only (Model 411) |
New Holland Discbine 1409, 1410, 1411, 1412, 1441, 1442
| Part Number | Tractor End | Implement End | Description |
|---|---|---|---|
| 55N-NH14XX-DISCBINE | 1.375"-6 spline | — | CAT6 CV with 1.375"-21 yoke |
| 14656848 | 1.375"-21 spline | — | 55N CV without implement yoke |
| 14756848 | 1.750"-20 spline | — | 55N CV without implement yoke |
New Holland Discbine H7220 – H7560
| Part Number | Tractor End | Implement End | Description |
|---|---|---|---|
| 14605548 | 1.375"-21 spline | — | 55N CV without implement yoke |
| 14705548 | 1.375"-21 spline | — | 55N CV without implement yoke |
PTO Driveline Configuration by H-Series Model
The H-series Discbines use up to three PTO shaft stages (primary, intermediate, secondary) depending on the cutting width and horsepower rating. The table below shows the driveline layout and rated capacity for each model.
| Model | Primary Shaft | Intermediate | Secondary Shaft | HP | RPM |
|---|---|---|---|---|---|
| H7220 | 35N CV | — | 35N Square | 65 | 540 |
| H7230 | 55N CV or Standard | Jack style 1.375"-21 | H8 Double CV | 80 | 540 / 1000 |
| H7320 | 35N CV | — | 35N Square | 65 | 540 |
| H7330 | 55N CV or Standard | Jack style 1.375"-21 | H8 Double CV | 80 | 540 / 1000 |
| H7450 | 55N Double 80/50 CV or 55N Standard (swivel) | — | 55N Standard | 90 | 1000 |
| H7460 | 55N Standard | 55N Square w/ clutch | 55N Standard | 100 | 1000 |
| H7550 | 55N Double 80/50 CV or 55N Standard (swivel) | 55N Standard | 55N Standard | 90 | 1000 |
| H7560 | 55N Standard | 55N Square w/ clutch | 55N Standard | 100 | 1000 |
Key Features of This PTO Shaft Assembly
55N-Series CV Joint
The 80-degree and 50-degree constant-velocity joints maintain uniform rotational speed at high operating angles, which is critical for PTO shafts paired with New Holland Discbine 1431 disc mower setups where the hitch geometry creates steep driveline angles during turns.
Precision Spline Profiles
Manufactured with 1.375" x 21, 1.750" x 20, and 1.5" x 23 spline options. CNC-ground tooth profiles provide tight-tolerance engagement (<0.05 mm backlash), reducing shock loads during PTO engagement and extending cross-kit bearing life.
Telescoping Length Adjustment
The inner and outer profile tubes allow length adjustment to suit varying tractor-to-implement distances. Hardened steel tubing with anti-corrosion coating withstands field debris, moisture, and high-load telescoping cycles without scoring.
Combination Clutch Protection
Each driveline assembly is paired with a friction-disc or shear-pin clutch that absorbs torque spikes when cutting discs encounter rocks or dense material, preventing damage to the gearbox and tractor PTO output shaft.
65–100 HP Capacity Range
Rated from 65 HP (H7220/H7320 at 540 rpm) up to 100 HP (H7460/H7560 at 1000 rpm), matching the full operating range of mid- to large-frame New Holland disc mower Discbine models.
OEM Cross-Compatibility
Engineered to interchange with Weasler and Bondioli & Pavesi original equipment, including cross kits, bearing caps, and guard assemblies. No modifications required for installation on factory-spec machines.
Applications in Agricultural Disc Mower Operations
This PTO shaft assembly is used wherever a New Holland or Case IH disc mower requires power transfer from a tractor PTO output. Common agricultural operations include:
- Hay & Forage Harvesting — Powering Discbine cutterbar disc modules at 3000 rpm knife-tip speed for uniform, clean cuts in alfalfa, timothy, clover, and orchard grass. The PTO shaft for New Holland Discbine 1431 disc mower, for example, runs the primary 55N Double CV at 540 rpm with a rated 65+ HP capacity.
- Pasture Maintenance — Sustaining consistent power delivery across undulating terrain. The CV joint design eliminates the velocity fluctuations that standard universal joints produce at high angles, reducing conditioner roll chatter.
- Multi-Crop Mowing — Switching between grass, cereal rye, and forage wheat with the same driveline. The telescoping PTO shaft adjusts to different tractor frame lengths without replacing components.
- Roadside & Perimeter Cutting — Disc mowers used in tight-turning roadside or fence-line passes subject the PTO shaft to extreme angles. The 80-degree CV head accommodates these conditions without loss of rotational uniformity.
- Commercial Hay Operations — High-hour commercial operators running H7450, H7460, H7550, or H7560 models at 1000 rpm benefit from the 55N-series torque capacity (rated to 100 HP) and the inline clutch protection against impact loads.
Related Agricultural Driveline Products
A complete agricultural PTO driveline system includes more than the shaft assembly. The following components work alongside these PTO shafts to form a reliable power transmission chain from tractor to implement:
Universal Joints & Cross Kits
35N, 55N, and H8 cross kits with greaseable or sealed bearing caps for field replacement.
Clutch Assemblies
Friction-disc, shear-bolt, and ratchet-type overload clutches sized for Series 4 through Series 8 drivelines.
Safety Shields & Guards
Cone and bell-type PTO guards meeting ASAE S493 standards for operator protection during field use.
Clamp, quick-disconnect, and push-pin yokes in 6-spline, 20-spline, 21-spline, and 23-spline configurations.
Frequently Asked Questions
Which PTO shaft fits a New Holland Discbine 1431 disc mower?
The Discbine 1431 and 1432 use Part Number 14656853, a 55N 80x50 Double CV assembly with a 1.375"-21 spline tractor end and a 1.5" x 23 spline implement end. If you only need the tractor-side half, order 83-14656853 (1.375"-21) or 83-14756853 (1.750"-20). The implement-side half is 82-14656853.
What is the difference between a 540 rpm and 1000 rpm PTO shaft?
The 540 rpm PTO shaft has a 1.375" (6-spline) output and is used on the smaller H7220 and H7320 models rated at 65 HP. The 1000 rpm PTO shaft typically has a 1.375" (21-spline) output and is used on the H7450, H7460, H7550, and H7560 models rated from 90 to 100 HP. Always verify the spline count and diameter before ordering.
Can this PTO shaft replace original Weasler or Bondioli & Pavesi drivelines?
Yes. Every assembly in this range is engineered to match the spline dimensions, CV joint angles, and tube profiles of the original equipment. No modifications to the tractor PTO stub or mower input shaft are needed. Cross kits, bearing caps, and guard mounts are also interchangeable.
Why does a disc mower use a CV joint instead of a standard U-joint?
Standard universal joints produce cyclic velocity fluctuations at operating angles above approximately 5 degrees. A disc mower PTO driveline frequently operates at steep angles during turns and transport. The CV joint eliminates these speed variations, delivering smoother power to the cutterbar and reducing vibration-related wear on gearbox bearings and disc modules.
Does this PTO shaft fit the Case IH DC 132 disc mower?
Yes. The Case IH DC 132 shares the same driveline platform as certain New Holland Discbine models. Contact us with your tractor PTO spline size (6-spline or 21-spline) and we will identify the correct part number for your setup.
How do I measure my PTO shaft for a replacement?
You need three measurements: (1) the spline diameter and tooth count on both the tractor and implement ends, (2) the closed length from yoke center to yoke center, and (3) the working (extended) length at your normal hitch position. Match these to the specifications in the tables above. If the spline profile and CV joint type match, the telescoping tube will accommodate minor length differences.
Get the Right PTO Shaft for Your Disc Mower
Send us your model number, tractor PTO spline size, and required length. We will match you with the correct part number and provide a delivered price within 24 hours.
Explore Our Other Agricultural Driveline Series
Beyond disc mower PTO shafts, we manufacture complete driveline solutions for a wide range of agricultural implements:
- PTO Shaft for Square Balers — Series 4/5/6 assemblies with slip clutch for New Holland, John Deere, and Massey Ferguson square balers.
- PTO Shaft for Round Balers — Heavy-duty Series 6/8 shafts with double CV joints rated up to 150 HP for large-frame round balers.
- Agricultural Sprockets & Chain Sets — Hardened steel sprockets for baler pickup, feed conveyor, and planter drive chains.
- Agricultural Gearboxes — Right-angle and T-type gearboxes for rotary cutters, tillers, feed mixers, and snow blowers.
- Universal Joints & Cross Kits — Full range from 1000-series through 2600-series for North American and metric European implements.
