If you own a skid steer loader and need to dig deep trenches, excavate foundations, or install drainage systems, a skid steer backhoe attachment transforms your machine into a versatile digging powerhouse. Unlike a dedicated backhoe loader, an attachment-mounted unit connects to your skid steer's quick-attach plate and runs off the machine's existing hydraulic system. Giving you excavation capability without the cost of a second machine. This guide covers everything you need to know: digging depths, hydraulic requirements, mounting types, compatibility, pricing, and which jobs each configuration handles best.

Ready to add digging power to your skid steer? Browse the full selection of backhoe attachments for skid steers at eSkidSteer and find the model that fits your machine and your job site.

What Is a Skid Steer Backhoe Attachment?

A skid steer backhoe attachment is a hydraulically powered digging arm that mounts to the front of a skid steer loader using the standard universal quick-attach plate. It consists of a boom, dipper stick, digging bucket, and stabilizer legs that deploy once the attachment is connected. The operator controls the backhoe from an integrated seat on the attachment frame, using dedicated hydraulic joysticks that are separate from the loader's drive controls.

Unlike a mini excavator or a standalone backhoe loader, a skid steer backhoe attachment leverages your existing machine's hydraulic power and mobility. You do not need an additional engine or drivetrain. The trade-off is that most attachments require a "Power Beyond" or "high-flow" hydraulic kit to deliver sufficient oil flow to the backhoe's control valve. This is an add-on circuit that bypasses the loader's standard hydraulic loop and provides the continuous oil flow the backhoe needs to operate the boom. Dipper, and bucket functions simultaneously.

Backhoe attachments are ideal for projects where you need to dig below the reach of the loader bucket, typically anything deeper than 18 to 24 inches. Common applications include trenching for irrigation mains, digging foundation footings, and excavating for underground utility runs. For jobs like installing a culvert under a driveway or running drainage pipe across a large property. A backhoe attachment turns a skid steer into a dedicated excavation tool that handles the full dig cycle from the operator seat.

Key Specifications: Digging Depth, Hydraulics, and Mounting Types

Digging Depth and Reach

Digging depth is usually the first spec buyers compare. Full-size skid steer backhoe attachments typically offer digging depths between 6 and 9 feet. The Blue Diamond skid steer backhoe attachment at eSkidSteer delivers a maximum digging depth of 6 feet with a 3.5-inch hydraulic cylinder bore and a 20-inch stroke. Making it well suited for drainage, light construction, and landscaping projects. Heavier-duty models such as the Spartan E-Z Digger reach 7 feet of digging depth with a bucket dig force of 3,800 pounds. Compact backhoe attachments on smaller machines can reach up to 9 feet 6 inches depending on the model and boom configuration.

The reach numbers matter for job planning. A 6-foot depth covers most residential and light commercial trenching. An 8- to 9-foot depth opens up larger excavations, deeper utility connections, and bigger foundation work. If you frequently dig below 7 feet, look for models with extended booms and higher breakout force ratings.

Hydraulic Requirements

Most skid steer backhoe attachments require a "Power Beyond" or "high-flow auxiliary" hydraulic circuit. This is not a standard feature on every skid steer. The Power Beyond kit feeds continuous hydraulic oil to the backhoe's control valve without interrupting the machine's drive or lift functions. The key specs to check are gallons per minute (GPM) flow and operating pressure. Typical requirements range from 12 to 25 GPM at 2,500 to 3,500 PSI, depending on the attachment size. The Blue Diamond full-size backhoe at eSkidSteer uses a 3.5-inch bore cylinder with a 20-inch stroke and includes hoses with flat-face couplers for simple hydraulic connection.

No electrical connections are required for most models. The backhoe's control valve is pilot-operated or direct-acting from the hydraulic joysticks mounted at the operator seat. This simplifies installation and reduces potential failure points.

Mounting Types and Quick-Attach Compatibility

Standard skid steer backhoe attachments use the universal quick-attach plate that matches virtually every skid steer loader on the market. Some models also offer machine-specific mounting frames for brands like Bobcat, Caterpillar, Case, Deere, and Kubota. These frames bolt to the loader arms and provide a more integrated fit. For most buyers, the universal quick-attach system is simpler and more flexible because you can swap the backhoe between different machines on the same job site.

Bucket Sizes and Tooth Options

Backhoe buckets are measured by cutting width inside the side cutters. Common widths range from 8 inches for narrow trenching up to 36 inches for mass excavation. The Blue Diamond full-size backhoe supports bucket widths from 8 to 30 inches, while the compact mini version works with 8-, 10-, and 12-inch buckets. Most buckets come with replaceable cast teeth held in by side pins for easy field replacement.

Skid Steer Backhoe vs. Mini Skid Steer Backhoe: What's the Difference?

Not all skid steer backhoe attachments are the same size. The main distinction is between full-size units built for standard skid steers and compact or mini units designed for smaller machines. eSkidSteer carries both types from Blue Diamond. And the choice depends on your machine size and the type of digging you do most often.

A full-size backhoe attachment handles big jobs like installing irrigation mains, digging deep drainage cuts, and excavating foundation footings. It requires a skid steer with enough hydraulic flow and weight to handle the digging forces. A compact mini backhoe, by contrast, is designed for smaller machines and confined work areas. The Blue Diamond compact mini backhoe attachment comes with 42-inch or 48-inch arm options and works with 8-, 10-, and 12-inch buckets. Its pivot linkage design improves breakout force while keeping the package compact enough for tight jobsites like residential backyards, nursery applications, and utility corridors.

If you regularly dig deep trenches, a full-size unit is the right choice. If you need precision and maneuverability in tight spaces, a mini backhoe will serve you better. Many larger contractors own both and swap them based on the job.

Top Use Cases for Trenching and Excavation

Deep Trenching for Drainage and Irrigation

Installing French drains, curtain drains, or agricultural irrigation mains requires trenches 3 to 6 feet deep. A backhoe attachment digs deeper and faster than a trencher or loader bucket for these applications. The backhoe's articulated boom lets you dig a straight trench and stack spoil on one side, which speeds up pipe laying and backfilling. After the pipe is installed, budget time for grading and compacting the backfill material back into the trench.

Utility Installation

Running underground conduit for power, data, or landscape lighting calls for clean, straight trenches at consistent depths. A backhoe attachment with an 8- or 12-inch bucket creates narrow utility trenches with minimal surface disruption. The ability to control bucket angle and depth from the operator seat makes it easier to maintain grade over long runs.

Foundation Excavation and Landscaping

For small building foundations, retaining wall footings, and pool excavations. A skid steer backhoe attachment provides the digging power to remove soil at depth while keeping the skid steer mobile enough to move spoil. Landscaping contractors use them for removing stumps, digging planting holes for large trees, and creating water features.

When NOT to Use a Backhoe Attachment

For small residential jobs in fragile turf areas, a trencher is often the better tool. Trenchers leave a narrower cut and are much gentler on the surrounding lawn. In quiet residential neighborhoods, a backhoe can also be too noisy and cumbersome for the scope of work. For shallow trenching under 18 inches, a loader-mounted tooth bar or a dedicated trencher attachment may be faster.

Safety and Operational Best Practices for Skid Steer Backhoe Attachments

Operating a backhoe attachment demands attention to safety procedures specific to the attachment configuration. Follow these steps every time:

1. Mark underground utilities before digging. Contact your local utility locating service to mark gas, water, electric, and telecom lines before breaking ground. This is not optional and applies to every excavation job.
2. Lower stabilizers and install counterweights. The backhoe creates significant leverage forces during digging. Deploy both stabilizer arms fully before operating. If the skid steer has a counterweight kit, install it to maintain stability.
3. Operate from the backhoe seat using dedicated controls. Do not operate the backhoe from the loader operator position. Move the traction unit from the loader operator's position, and operate the backhoe from the backhoe seat using the dedicated joysticks.
4. Secure the boom when unattended or transporting. Install the safety pins to prevent the boom from moving up, down. Or side to side before leaving the backhoe unattended, transporting it, or disconnecting it from the skid steer.
5. Wear appropriate PPE. Always wear gloves, safety goggles, and steel-toe boots when operating or servicing backhoe attachments.
6. Inspect equipment before each use. Check all hydraulic hoses, fittings, and connection points for damage or leaks. Verify that the quick-attach plate is fully engaged and that all pins and retainers are in place.
7. Work within a barricaded work zone. Keep all non-essential personnel outside the designated work area. Do not dig outside the barricaded zone.

Cost, Compatibility, and Brand Considerations

Skid steer backhoe attachments range widely in price depending on digging depth, brand, and included features. At the entry level, the Blue Diamond compact mini backhoe starts around $1,292 and offers a 42- or 48-inch arm with 8- to 12-inch bucket compatibility. The full-size Blue Diamond six-foot backhoe is approximately $2,818 and includes hoses, flat-face couplers, and replaceable cast teeth. At the higher end, commercial-grade attachments like the Spartan E-Z Digger run around $6,625 with a 7-foot digging depth. 3,800 pounds of bucket dig force, and a one-year warranty. Competitor pricing on models with curved booms and Italian-sourced hydraulic valves ranges from $5,299 to $5,599 for 7- to 8-foot digging depths.

Before buying, verify these compatibility points against your skid steer's specifications:

• Machine weight and lifting capacity: The attachment plus the digging forces can exceed 1,000 pounds of combined static load. Ensure your skid steer's rated operating capacity can handle the attachment at full extension.
• Hydraulic flow rate: Check your machine's auxiliary hydraulic flow in GPM. Most backhoe attachments require 12-25 GPM. If your machine falls below the requirement, the backhoe will operate slowly or may not cycle properly.
• Mounting system: Universal quick-attach fits most machines, but some brands use proprietary systems. Verify that the attachment matches your coupler type or that an adapter plate is available.
• Manual verification: Always consult your machine's operator manual and the attachment's operator manual together to confirm compatibility before making a purchase.

eSkidSteer carries backhoe attachments from Blue Diamond, Paladin Heavy, and FFC, with seven models available in the skid steer backhoe collection. In addition to the backhoes themselves, the collection includes replacement buckets, teeth, and hydraulic components.

Frequently Asked Questions

Can I use a backhoe attachment on any skid steer?

Most skid steers with a universal quick-attach plate and a Power Beyond hydraulic circuit can run a backhoe attachment. However, compatibility depends on hydraulic flow rate, machine weight, and the specific mounting system. Consult both the machine and attachment operator manuals before purchase. Some brands like Cat, Bobcat, and Deere may require machine-specific mounting frames or adapter plates.

What hydraulic requirements are needed for skid steer backhoe attachments?

Backhoe attachments typically require 12 to 25 gallons per minute (GPM) of auxiliary hydraulic flow at 2,500 to 3,500 PSI. A "Power Beyond" hydraulic kit is often necessary to supply continuous oil flow to the backhoe's control valve. Most attachments connect via flat-face hydraulic couplers and require no electrical connections.

Are skid steer backhoe attachments good for trenching?

Yes. Backhoe attachments are excellent for deep trenching applications such as drainage pipe installation, irrigation main runs, and utility conduit. They dig deeper and faster than loader buckets or walk-behind trenchers for trenches over 18 inches deep. For shallow trenches in sensitive turf, a dedicated trencher may be the better choice.

What is the typical digging depth of a skid steer backhoe?

Full-size backhoe attachments typically dig 6 to 9 feet deep depending on the model and boom configuration. Compact mini backhoe attachments offer 42 to 48 inches of arm reach, giving an effective digging depth of 3 to 4 feet. The specific depth depends on the skid steer's hydraulic capacity and the attachment's design.

Do I need a hydraulic thumb on my skid steer backhoe?

A hydraulic grapple thumb is helpful but not essential. It allows you to grip and move irregular objects such as rocks, logs, and demolition debris during excavation. If you primarily dig clean trenches, a standard backhoe bucket serves well without a thumb.

How do you mount a backhoe attachment to a skid steer?

Line up the attachment's quick-attach plate with the skid steer's coupler, tilt the coupler forward, engage the top edge, and roll back to lock. Secure the attachment with the coupler's locking pins or spring retainers. Connect the hydraulic hoses using the flat-face couplers, verify that the Power Beyond circuit is active, and lower the stabilizers before operating from the backhoe seat.

Ready to Upgrade Your Skid Steer's Capability?

A skid steer backhoe attachment is one of the most versatile additions you can make to your equipment fleet. Whether you need the deep digging power of a six-foot full-size model or the precision of a compact mini backhoe for tight jobsites. ESkidSteer has you covered with attachments from Blue Diamond, Paladin Heavy, and FFC. Browse the full skid steer backhoe attachment collection to compare models, specs, and pricing for your next project.