Why Rebuild a Pines #2 LH Hydraulic Tube Bender?
Is your old Pines #2 LH showing its age? Maybe it’s starting to leak hydraulic fluid, miss bend angles, or just feels outpaced by today’s production demands. Many fab shops and maintenance managers wrestle with the same question: do I keep patching this machine, or invest in a new one?
Buying new isn’t always the best move, especially if your current bender still has a solid frame and basic mechanical integrity. That’s where a full rebuild of your Pines #2 LH comes in. Unlike a quick touch-up or cosmetic refresh, a true rebuild is a complete transformation: brand-new hydraulics, modern COMPTROL digital controls by Sierra Controllers, fully upgraded swing and stationary arms, and new wiring, electrical box, and lubrication systems. In short, it’s a mechanical, hydraulic, and digital rebirth of your machine, designed to get another decade or more of reliable service, often at less than half the cost of a new unit.
Rebuilt vs. Refurbished vs. As-Is
As-is means exactly what it sounds like — the bender is sold in its current condition, no updates, no guarantees, usually no testing. You’re buying risk along with the machine.
Refurbished means the machine may be cleaned up, repainted, and tested, and some parts might be replaced, but there’s no guarantee of comprehensive inspection or overhaul. It’s often mostly cosmetic.
Rebuilt, like the Pines #2 LH rebuild described here, goes through a complete teardown and restoration: every major system, mechanical, hydraulic, and electrical, is inspected and rebuilt or replaced, the machine is fully recalibrated and tested, and it’s often upgraded with modern control systems. It’s essentially given a second life with the performance and reliability of a new machine, at a much lower cost. The rebuild starts with your own core unit, meaning the same frame and base you’ve been using, so it’s tailored to your production environment while saving on shipping and sourcing costs.
About Pines Engineering
Pines Engineering is a well-known American manufacturer with a deep legacy in the tube and pipe bending world. For decades, their machines have been the go-to for aerospace hydraulic lines, automotive exhaust systems, boiler and heat exchanger tubing, and custom fabrication shops. If you’ve ever bent tight-radius stainless steel tubing or handled thick-walled aluminum pipe, chances are you’ve used or seen a Pines machine on the floor — which is why rebuilding one, especially the #2 LH hydraulic model, is often a better long-term investment than switching brands or models. Rebuilding instead of replacing keeps you within your current workflow, keeps your tooling compatible, and extends the service life of a machine already proven in your production line.
The COMPTROL Controller Upgrade
If you’ve struggled with outdated controls on your tube bender — unlabeled buttons, unreliable bend accuracy, time-consuming setups — this upgrade will feel like a game-changer. The COMPTROL digital controller, built by Sierra Controllers, replaces old-school analog dials and limited PLC panels with a smart, menu-driven interface designed for modern fabrication shops. It’s the brain that brings your rebuilt Pines #2 LH up to today’s standards of precision, automation, and ease of use.
Older tube bender controls slow down production, frustrate operators, and leave room for human error. COMPTROL solves that with intuitive, menu-driven screens, alphanumeric part naming instead of cryptic codes, massive storage capacity for part files and bends, manual, semi-automatic, and automatic run modes, and on-screen status displays of angle, bend data, and more. Whether you’re doing short-run custom jobs or high-volume production, it gives operators full control without the complexity.
Key Features
Bend angle feedback and live tracking; programmable mandrel oscillation and extraction timing; clamp delay and pressure die boost timing (where hydraulics allow); automatic mandrel lubrication intervals; quick-disconnect connection to the electrical box for easy servicing; and a spare keypad included for downtime protection. It’s not just a panel, it’s an operator-focused system that reduces setup time, improves consistency, and supports modern safety and tooling expectations.
The controller integrates seamlessly with the rest of the rebuild — interfacing directly with new Vickers valves and Peninsular cylinders, tying into the new electric motor and wiring, supporting mandrel sequencing, boost timing, and bend arm deceleration, and handling early mandrel extraction for thin-wall or complex bends. That means less manual tuning, more automated control, and fewer scrap parts.
Frame and Arm Upgrades
It’s not just the controller or hydraulics that matter — the swing arm, stationary arm, and frame components give the machine its power, precision, and long-term durability. If the frame is the skeleton, the swing and stationary arms are the bender’s muscles and joints. Over time these components wear down, introduce alignment issues, and cause inconsistent bends, which is why they’re a major focus in a professional rebuild.
Swing Arm
The swing arm handles the torque and rotational force needed to form each bend, so any wear here translates directly to bend error. During the rebuild it’s removed and inspected for cracks, wear, and stress points, the keyway repaired if worn (a common failure point), and the bend die mounting surface skim-cut for trueness. It’s fitted with new Timken cup & cone bearings, a new spindle key and die key, new fasteners and spanner nuts, a new inner locating ring, and a new larger die stud and nut. Your existing drive sprocket is reused to save cost.
Stationary Arm
The stationary arm holds the die in place while the tube rotates — precision and rigidity here are essential. The rebuild includes a full visual and structural inspection, new fasteners, and alignment checks to ensure proper clamp die interaction. Even though it doesn’t move, its role is critical to every bend’s accuracy.
Slide & Guide Surface Upgrades
Both arms mount to steel slides with bronze wear strips, which are completely replaced during the rebuild: new steel slides with bronze strips for smooth travel, new backup bolts and nuts, new wear strips, clamp bars, gibs, rod ends, bushings, pins, and snap rings, new grease fittings (zerks), and a full set of slide backup blocks (1″ through 5″). These upgrades restore precise motion and repeatable alignment, which translates directly to consistent bend angles, even under heavy load.
All-New Hydraulic System
Hydraulic power is everything in tube bending. If your bender’s hydraulics are tired, slow, or leaking, no amount of controller upgrades or cosmetic fixes will save production — which is why a complete hydraulic overhaul is the cornerstone of this rebuild. Decades-old seals, valves, and cylinders won’t give you the precision or pressure control modern shops demand; this rebuild gives your machine a brand-new hydraulic system built for power, responsiveness, and leak-free operation. With the upgraded system, the bender is capable of operating up to 3,000 PSI, with fully adjustable flow and directional controls.
New Peninsular Cylinders (Made in the USA)
New cylinders where it matters most: bend cylinder (5″ bore x 19″ stroke), clamp & pressure die cylinders (designed for synchronized engagement), and a mandrel extractor cylinder supporting advanced timing and early extraction functions. These are built to industrial standards and matched to original OEM specs, delivering consistent hydraulic bending power across cycles.
New Vickers Valve Stack & Controls
The rebuild replaces outdated valves with a full set of Vickers PA5 directional and flow control valves engineered for repeatable pressure management — directional valves for bend, clamp, pressure die, and mandrel, plus flow control valves for smooth actuation and programmable delay, mounted on a new hydraulic manifold for modular design and ease of service, and controlled directly through the COMPTROL system. Together these allow real-time tuning of pressure die assist, mandrel retraction delay, and bend arm deceleration — key to getting clean bends on everything from mild steel to thin-wall aluminum.
Fresh Hoses, Fittings, and Monitoring Hardware
New hydraulic hoses and fittings throughout (no reused components), a new oil suction strainer to protect the pump, new pressure gauges for real-time hydraulic feedback, an oil sight glass for easy maintenance checks, and new gaskets on side oil tank covers. Replacing the supporting hardware along with the major components dramatically reduces the risk of leaks, contamination, or pressure drop.
A new Vickers piston pump is at the heart of the system, delivering powerful and consistent flow to all hydraulic subsystems, built for high duty cycle applications, precision-controlled fluid flow, and seamless integration with modern bender controllers. Most failures in aging tube benders trace back to unpredictable hydraulic behavior — pressure surges, worn seals, and slow valves don’t just cause downtime, they ruin bends. This isn’t patching a leak, it’s future-proofing the machine for today’s production demands.
Updated Electrical System
Working with old industrial electrical systems can be frustrating, risky, and downright dangerous. The electrical system on a rebuilt Pines #2 LH is completely modernized from the ground up for safety, reliability, and smooth integration with the new controller.
The old electrical panel is removed and replaced with a modern, fully-wired main box, tailored to your shop’s voltage, with a cleaner layout, safer connections, and easier troubleshooting. It’s also designed to accommodate the quick-disconnect feature of the COMPTROL controller. This isn’t a partial rewire — every critical component is new: main fused disconnect switch, motor starter for smoother starts and stops, transformer to ensure correct voltage to the control system, and all-new industrial-grade wiring, switches, fuses, and fittings.
The machine also gets a new Totally Enclosed Fan Cooled (TEFC) motor, which keeps dust and debris out while staying cool under pressure, even in tough environments. It’s C-faced and adapted with a new coupling for efficient, dependable power delivery. A spare controller keypad is included with the rebuild too — a simple addition, but useful, since waiting on parts isn’t an option when your machine is down.
New Mechanical Components for Accurate Bending
Restoring repeatable precision requires more than fresh hydraulics and electronics — even small amounts of slop or backlash in key mechanical parts can lead to poor bend quality, misalignment, or tooling damage.
Rear sprocket pin & bushing: the rear sprocket is central to rotational movement; the pin and bushing are replaced to restore solid drive engagement, while your existing sprocket is reused if it passes inspection.
New #160 front & rear bend chains: chains that have stretched over years of use throw off timing, reduce torque efficiency, and impact angle accuracy. Both front and rear chains are replaced with new #160 heavy-duty industrial chains with new connecting links, ensuring consistent transmission of bending force from motor to swing arm, cycle after cycle.
New linear rail & bearing + master bar assembly: precision doesn’t come from brute force alone, it comes from controlled motion. A new linear rail and bearing are installed for smooth, low-resistance movement, and the master bar assembly is replaced to ensure proper positioning of the clamp and pressure dies — especially important when using CNC or automated sequencing.
New clamp die holder assembly: clamping inconsistencies are a leading cause of bad bends. A new adjustable clamp die holder with a T-slot face design gives more control over tool alignment and reduces slippage, especially helpful when switching between different tube sizes or materials.
In many cases, your existing wiper die holder is retained if it’s in good condition and free of distortion, preserving continuity in your tooling setup and reducing unnecessary replacement costs. Every degree of misalignment or bit of mechanical looseness introduces error — these upgrades re-center bend forces, improve tooling life, eliminate backlash and vibration, and let you get the full benefit from the upgraded hydraulics and controls.
Lube System Overhaul
Proper lubrication is one of the most critical systems in any industrial tube bender. When slides, pins, bushings, and wear surfaces don’t get the lubrication they need, they degrade silently until performance drops or failure strikes — which is why this rebuild includes a brand-new, fully integrated lubrication system.
At the heart of it is the Lube USA electronic slide lubricator, a fully programmable lube controller that delivers precise lubrication at scheduled intervals, reduces manual greasing needs, and ensures uniform coverage on critical moving parts — significantly reducing the risk of premature wear on linear slides, bushing and pin seizing, and unexpected downtime from overlooked lube points.
The entire delivery system is replaced: new junction blocks, metering valves, lines, ferrules, and fittings, and new grease points at every major pivot, slide, and contact surface. Without reliable lubrication, even brand-new mechanical components wear quickly under load — this system works constantly in the background to extend the life of bushings, gibs, and rod ends, maintain smooth movement in clamps and slides, keep bronze wear strips from overheating or galling, and reduce maintenance frequency and unplanned service stops.
Test Run & Final Validation
Once the machine is fully rebuilt, mechanically, hydraulically, electrically, and digitally, it’s time for the most important step: proving that everything works together in the real world. This isn’t just flipping a switch — it’s a full operational run-through to make sure the rebuilt bender delivers consistent, accurate results before it returns to your shop floor.
The machine is fully cycled through all bending operations, from mandrel insertion to clamp engagement and bend rotation, confirming no interference or misalignment across systems, full response from the COMPTROL controller, stable hydraulic pressures under load, and proper timing of mandrel extraction, pressure die assist, and clamp sequencing. To truly dial in performance, we ask that you provide sample tubing and tooling that matches your production specs, so we can replicate your real-world use case, run test bends on your exact material, and give you visual and measurable proof of accuracy rather than just generic specs.
Test bend results are reviewed for bend angle precision, ovality and wall thinning, clamp and wiper effectiveness, and return accuracy over multiple cycles — anything off gets adjusted before the bender leaves the floor. When your machine is delivered, you’re not just getting a rebuilt machine, you’re getting a tested and proven asset ready to bend parts from day one.
Warranty, Support & Post-Sale Confidence
A professional rebuild includes more than parts and labor — it includes a clear warranty, responsive support, and a partnership you can rely on after delivery.
The COMPTROL digital controller, manufactured by Sierra Controllers, comes with a 2-year warranty on the controller board itself, covering hardware malfunctions, electrical failures in normal operating conditions, and defective display or interface issues. In the rare case of a failure, replacement parts and technical assistance are provided directly through Sierra.
Warranty on the rebuilt machine components (hydraulics, electrical system, frame parts) typically ranges from 6 to 12 months depending on the rebuilder’s terms and shop practices — always confirm which components are covered, what’s included in labor or service, and support for remote troubleshooting and parts shipping.
Post-sale, you can expect startup assistance when reinstalling and powering up the machine at your location, controller support for programming or reloading part files, access to spare parts (from dies and tooling to electrical components), and phone or email support from the shop or the control vendor. When you receive your rebuilt Pines #2 LH, it should feel like running a brand-new machine, with the added benefit of familiar tooling and a lower capital cost.
Why Choose Rebuilt Over New or As-Is
A rebuilt Pines #2 LH offers modern performance, trusted mechanical strength, and significant savings over new machinery — often the smartest move for mid-size and custom fabrication shops.
| Feature / Condition | New Pines Bender | Rebuilt Pines #2 LH | Used “As-Is” Unit |
| Approx. Cost | $180,000–$250,000 | $65,000–$85,000 | $20,000–$35,000 |
| Controller | Brand new OEM CNC | New COMPTROL CNC | Outdated / unknown |
| Hydraulic System | New OEM | All-new: Vickers & Peninsular | Worn or leaking |
| Electrical System | OEM-certified | Fully rewired & modernized | Unsafe / outdated |
| Delivery Time | 6–12 months | 6–10 weeks (avg.) | Immediate (but risky) |
| Warranty | Full OEM warranty | Up to 2 years (controller) | Typically none |
Bottom line: rebuilt gives you OEM-like reliability without the OEM price tag or long lead time. New machines, especially post-pandemic, often come with 6–12 month delivery times before setup or tooling delays. A professionally rebuilt bender, using your core or one in inventory, can often be delivered in as little as 6 to 10 weeks, meaning less downtime, faster ROI, and quicker impact on your shop’s capacity.
This isn’t a stripped-down retrofit — with a new digital controller, all-new hydraulic drive system, full mechanical tear-down and upgrade, and fresh electrical wiring and safety features, your machine can perform better than when it was new, thanks to programmable automation, easier troubleshooting, and tighter control tolerances.
If you’re not running 3 shifts, 6 days a week, a new machine might be overkill, but that doesn’t mean settling for an unreliable used unit either. A rebuilt bender gives mid-size shops and job shops the same level of performance as a high-end OEM machine without blowing the annual equipment budget — a good fit for aerospace suppliers doing custom hydraulic lines, aftermarket automotive chassis builders, structural fabricators working high-mix/low-volume parts, and HVAC, boiler, and railing manufacturers with changing specs.
Frequently Asked Questions
What’s the typical lead time for a rebuild?
Most rebuilds take 6 to 10 weeks, depending on shop workload, machine condition, and any custom specifications (voltage, color, etc.). Supplying your own core can also influence turnaround.
Can I reuse my existing tooling (dies, mandrels, clamp blocks)?
Yes, in most cases. Existing tube dies, mandrels, clamp dies, and wiper dies can be reused as long as they’re in good condition. The new clamp die holder is made compatible with T-slot face styles for flexible die setup, and you may be asked to send in your tooling for a compatibility check and final test runs.
Is post-sale support included?
Yes — phone or email tech support, help with initial machine startup, support for the COMPTROL controller (through Sierra Controllers), and access to replacement parts and setup/programming guidance. Some rebuilders also provide remote support and troubleshooting documentation.
Can this bender handle stainless steel or aluminum tubing?
Yes. The rebuilt Pines #2 LH is designed for a wide range of materials, including stainless steel, aluminum, mild steel, and titanium in certain gauges. With the upgraded hydraulic and control system, the bender can be adjusted for pressure, bend speed, mandrel timing, and pressure die assist, making it suitable for both soft and high-strength materials — just be sure to match the right tooling and mandrel type for the alloy and wall thickness.
