New Holland's SUM medium-duty and SUH heavy-duty subsoilers are highly versatile, designed to adapt to a wide range of soil types. These subsoilers are equipped with features that allow them to efficiently operate in varying conditions, including fields with high levels of crop residues. The design enables them to work directly into land following crops.
All models include a leg with a reversible tip, a pair of adjustable and detachable side blade clod busters, and a clod splitter to enhance soil shattering. The working depth is precisely controlled by twin rear 220mm diameter spike rollers with an adjustable tilt angle, providing the flexibility to tailor the finish to suit the specific soil and conditions.
In terms of working depth, SUM models can be set to operate within the range of 200mm to 500mm, while SUH models are specifically designed to work between depths of 250mm to 550mm. This ensures that heavy soils are left level and clod-free, while lighter soils exhibit a more open surface, reducing the risk of capping during adverse conditions. These subsoilers effectively enhance soil structure and promote optimal conditions for crops, contributing to improved agricultural productivity.
RIGHT FOR YOUR SOILS. RIGHT FOR YOUR BUDGET.
New Holland SUM and SUH linkage-mounted subsoilers come in working widths of 2.50m, 3.00m, and 4.00m, designed to handle a variety of soil types. They are compatible with tractors ranging from 110hp to 350hp, making them accessible for both smaller enterprises and large farms or contract operations. Both the medium and heavy-duty SUM and SUH models offer options for either mechanical or auto-reset hydraulic leg protection, ensuring advanced soil management solutions tailored to different needs.
A fully welded frame built to match your workload
SUM medium-duty subsoilers feature a robust, precision-welded frame and are designed to operate at working depths of up to 500mm. Similar to the heavier SUH models, the frame's wave design facilitates the passage of heavy crop residues, preventing blockages. The subsoilers come with a standard CAT IIIN / III hitch.
Hitch size: CAT III N / III
Leg thickness: 30 mm
Reversible leg tip
Hydraulic side panels available
Working depth: up to 500mm
R model – shear-bolt leg protection
RH model – hydraulic break back
Heavy duty subsoiling
SUH subsoilers are engineered for the toughest soil conditions and can operate at depths of up to 550mm. They are built to handle intensive workloads, making them ideal for contract operators and demanding applications. The SUH models come with a standard CAT III / IV N hitch.
Hitch size: CAT III / IV-N
Leg thickness: 35mm
Reversible leg tip
Hydraulic side panels available
Working depth: up to 550mm
R models – shear-bolt leg protection
RH model – hydraulic break back
DIG DOWN TO FIND THE RIGHT WORKING DEPTH
The appropriate working depth for SUM and SUH subsoilers depends on soil conditions. These subsoilers can be adjusted to suit different soil types and conditions. To determine the optimal depth, a test pit can be dug to assess the subsoil condition, allowing the subsoiler’s working depth to be set accordingly.
Depth adjustment
Depth adjustment is hydraulic and can be varied on the move (1) 3 depth ranges can also be set for:
Shallow
Medium
Deep tillage
Mechanical tie rods (2) adjust the tilt angle of the rollers, allowing them to navigate over lumps. The front roller should be set at a higher position than the rear roller.
Visible depth adjustment
A graduated scale, clearly visible from the tractor cab, indicates the set working depth.
THE RIGHT TOOL FOR THE JOB, NOW AND IN THE FUTURE
To address minimal tillage requirements, New Holland offers customizable SUM and SUH subsoilers tailored to specific needs. A key feature across the range is the fully welded frame, ensuring maximum durability. Each model includes easily replaceable wearing parts and straightforward setup for optimal performance. SUM and SUH subsoilers enhance soil structure in areas affected by poor practices, heavy trafficking, and flood damage.
Shear bolt simplicity for all models
All models feature shear bolts as either the primary (R models) or secondary (RH models) form of leg protection
Shear bolts are set to break at 5400kg force (SUH) & 4200kg force (SUM)
Offers protection from large immovable obstacles
Onboard storage for 5 spare shear bolts
Non-stop RH performance in stony ground
SUM & SUH RH models are fitted with hydraulic auto reset stone protection
Allows non-stop working in stony conditions
Hydraulic cylinders on each leg are linked to nitrogen accumulators to provide damping
Break back pressure can be adjusted between 1000 - 2000kg
Large stones can be cleared in the subsoil without bringing them to the surface
RH models offer a second layer of protection by using shear bolts if the obstacle cannot be overcome
Lateral and leg clog breakers
140mm side blades are fitted to each leg to shatter lumps through the soil layers
They have a minimized draft impact and are height adjustable depending on your working depth range
Clod breakers mounted on the center of the leg serve as wear plates to protect the leg and as well as breaking large lumps
Reversible leg points
The leg points on all models are secured with specially designed heavy-duty roll pins, making them easy to reverse or replace when fully worn.
The right wearing parts for your soils
Different soils come with unique challenges, and SUM and SUH subsoilers are designed to meet these demands. They are available with boron steel points and lateral clod breakers, which are less likely to shear and are well-suited for stony ground. For abrasive soils, tungsten-coated wearing parts are recommended, offering a working life up to three times longer than boron parts under similar conditions.
