Plant and Machinery Repairs and Alterations

Heavy Plant Repairs, Modifications and Strengthening

We specialise in plant and machinery repairs, modifications and strengthening for heavy plant, machinery and attachments – keeping equipment safe, productive and compliant in demanding conditions.

Our work covers excavators, loaders, dozers, telehandlers and ancillary plant, as well as buckets, blades, booms, dippers, quick hitches and custom attachments. Repairs are delivered on site or at our workshop, depending on access, precision requirements and downtime constraints. The aim is simple: restore structural integrity, extend service life and return equipment to work with minimal disruption.

Buckets, Blades and Arms

Buckets, cutting edges and arms endure abrasion, impact and cyclic loading that drive wear, distortion and cracking. We start with a practical assessment of wear patterns, crack paths and fit-up, then choose the right method for the base material and duty cycle. Cutting edges are removed, dressed and replaced to the correct profile and hardness to restore bite and reduce drag. Where abrasion dominates, we specify wear plates, corner packages and hardfacing overlays to protect high-wear faces without unnecessary weight. Crack repairs are prepared correctly with vee-outs and removal of fatigued material, followed by controlled preheat and interpass temperature management. Bosses and eyes are rebuilt and dressed, with concentricity checked before pin fit to ensure smooth motion and even load transfer.

A recent project involved fitting a new cutting edge to a client’s grading bucket, fitted to a 30m long reach excavator. See the project for more info and photos.

Pins, Bushes and Line Boring

Play in pins and bushes accelerates wear and increases stress on surrounding members. We remove worn components, measure bores and check for ovality, misalignment and surface damage. Where required, bores are weld-built and line bored back to the correct, coaxial diameter so new bushes and pins seat properly and retain grease. Sealing lands and grease paths are reinstated to avoid contamination and dry running. The result is accurate motion, reduced shock loading and longer intervals between services.

Fabrication of Guards, Brackets and Custom Attachments

Many sites need more than like-for-like replacement. We fabricate guards, screens, belly plates and impact shields tailored to machine and duty. Brackets for hydraulics, ancillary kit and safety equipment are designed to spread loads and remain maintainable in the field. Where a task calls for a special tool or interface, we build custom attachments and adaptors that mate with OEM and aftermarket systems. Throughout, we balance strength, weight and serviceability so operators can reach fasteners, grease points and inspection areas without unnecessary strip-down.

We can also improve load security of HGV trailers by adding heavy duty tie down rings, as we did on a recent project. This is crucial fabrication work to ensure heavy machinery is secure when transporting.

Hydraulic Pipework and Mount Alterations

Hydraulic reliability depends on sound routing, supports and vibration control. We reroute pipework to avoid pinch points and abrasion, add protection where impact is likely, and reinforce or redesign mounts to prevent crack initiation around heat-affected zones. During alterations we maintain cleanliness, cap ports and manage contamination so systems are not compromised. After reassembly, we verify alignment, operate through full travel and check for leaks and interference before handover.

Strengthening and Life Extension

Targeted strengthening can prevent known issues from recurring. We add reinforcement plates, gussets and doublers at stress risers, specify wear strips and overlays where abrasion is concentrated, and refine design details to smooth load paths. Heat input is sequenced to control distortion, and post-repair inspection confirms geometry, clearances and protection meet the intended standard. The objective is to extend service life and reduce unplanned downtime without introducing maintenance headaches.

A recent project involved repair work to the restore paint of Pro rail Services’ RRV excavator fleet. See the project for more info.

On-site Repairs or Workshop Service

Some work is best completed at your location, especially when plant is large, access is tight or downtime must be minimised. Our mobile setup brings welding, cutting and line boring capability to site under permit-controlled conditions with appropriate safety systems. Other jobs benefit from the controlled environment of our workshop, where complex fabrication, precision machining, preheat and coating can be managed end-to-end before refit. Get in touch and we’ll recommend the right setting once we understand scope, access and time pressures.

Processes, Materials and Quality Control

We select processes to suit material, thickness and service conditions. MIG/MAG, TIG and MMA (ARC) are applied as appropriate, with oxy-fuel cutting for heavy sections and plasma cutting for precise plate work. For abrasion resistance, we apply hardfacing and fit wear packages matched to the media and duty. Base materials include carbon steel and high-strength low-alloy grades common in plant, with stainless options where corrosion dictates. Quality is built into the sequence: joint preparation and fit-up come first; preheat, interpass and cooling are controlled; and inspection verifies the result. Where warranted, we provide additional checks such as dye penetrant on critical areas, dimensional verification for bores and seats, and functional checks through full motion before sign-off.

Planning and Workflow

Every job follows a clear path. We assess the defect, access and constraints, then agree a method that balances durability, time and cost. Preparation covers cleaning, strip-down and trial fits to de-risk the final weld or bore. Execution is controlled and documented so the repair can be understood later if needed. Verification covers visual quality, geometry and function; handover includes straightforward aftercare so operators know what to watch as the part beds in.

Typical scenarios we address

  • Cracked bucket lip or sidewall resolved with vee-out, wear package and controlled heat
  • Oval pin bores corrected by weld-build, line boring and new pin and bush fit
  • Worn or rolling blade edge replaced to specified hardness with seating repairs
  • Ram bracket cracking mitigated with redesigned gusseting and doubler plates
  • Hydraulic pipework chafing eliminated through rerouting and protective guarding

Why this approach works for heavy equipment

Plant operates under shock, abrasion and constant vibration. Repairs fail when preparation is poor, geometry is ignored or heat is mismanaged. Our approach prioritises accurate assessment, correct process choice and controlled execution so the repair behaves like the original structure, or better. By restoring fit and alignment, strengthening known weak points and shielding wear faces, we reduce repeat failures and extend the useful life of high-value components.

Maintenance and Aftercare

Even the best repair needs simple care. We advise on greasing intervals, checks for early signs of play, inspection of high-wear surfaces and the right time to reapply hardfacing before damage propagates. Cutting edges perform best when seated and kept sharp; brackets, guards and fasteners should be rechecked after initial cycles for tension and any early cracking. Where machines operate in highly abrasive conditions, scheduled bore and pin checks prevent small issues turning into costly rebuilds.

Service Coverage

We support projects across the South East and can advise on logistics for workshop-based work if lifting or transport is required. Share photos, a description of the issue and site details, and we will recommend a practical route to get you back to work.

Get a Quote

We handle plant repairs, digger welding, and bucket rebuilds across West Sussex, including Horsham. Email info@alphawelding.co.uk or call 01403 823968 or 07917 390669 with the issue, your location and any photos available.

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