Door Components and Latching Systems

Mainetec offers a wide range of innovative replacement door parts for electric mining shovels to suit both the  Komatsu (P&H). and CAT branded machines. We can supply parts to suit standard door latching systems as well as the Mainetec designed and patented iTrip® latching system.

The Mainetec iTrip® Latching System is a revolutionary design compatible with both CAT and Komatsu (P&H) dipper doors. With a low initial investment, the iTrip® Latching System will reduce service intervals and inventory cost by achieving extended service life of door components. Less wear on the door components decreases shimming time of the latch bar and in return decreases downtime. For maximum benefit we recommend that the iTrip® Latching System is run in conjunction with the Mainetec Static Door Pin Upgrade which also reduces wear of both the door bushes and pins, again decreasing shimming intervals.

With minor modifications required to install, the iTrip® Latching System can be easily retrofitted to the OEM system giving the end user peace of mind.

Click here to download a copy of the iTrip® Latching System product information sheet.

We have used our years of industry experience along with superior materials and manufacturing processes for all our parts, from nylon and polyurethane through to forgings, to reduce inventory cost and increase longevity.

To back up our Mainetec range of shovel parts we can assist you with development and execution dipper maintenance strategies. This will ensure the lowest possible inventory budget for your dipper per annum.

Mainetec carry a range of parts in stock at the Mackay facility to reduce your risk of downtime.

Contact Mainetec today to discuss how we can save you money through lower inventory cost and longevity of components.

Bushes and Pins

Mainetec manufacture a huge range of bushes and pins to suit both Komatsu (P&H) and CAT branded machines – from dipper body and door right through to crowd and undercarriage, from a range of different materials such as bronze, self-lubricating nylons, induction hardened steel, forged manganese and much more. Mainetec can also custom manufacture any of your bush and pin requirements.

Wear Parts & GET

Mainetec have opted for the latest foundry furnace technology – AOD (Argon Oxygen Decarburization) for all of our Terminator® GET range. What this means for customers is increased longevity of components and superior quality castings that will deliver real cost savings.


  • The Terminator® GET range will reduce change outs – increasing machine availability and reducing the hazardous task of changing out GET in the field
  • Tried and proven on a range of Dippers, Excavator Buckets and Draglines we are 100% confident we can offer highly competitive GET both on quality and price
  • With our range growing every day, we will have cost saving options for all size machines

All our parts offerings are backed up by our site service representatives who can assist with the management of GET on site and with budgeting your future requirements – Mainetec offers a superior service that puts us at the forefront of innovation and support.

Lower Works

Mainetec has a wide range of shovel undercarriage components made to the highest standards and latest manufacturing technologies. We offer quality and reliability at very competitive prices.

Mainetec can supply the entire range of electric shovel undercarriage components

  • Track pads
  • Guide rails
  • Drive tumblers
  • Front idlers
  • Lower rollers
  • Shafts
  • Bushes
  • Thrust washers
  • Seals

Mainetec can supply undercarriage components to suit the following equipment:

  • P&H 4100
  • CAT495
  • O&K RH170/200/340/400
  • Hitachi
  • Komatsu
  • Liebherr
  • Sandvik

Mainetec can also refurbish your side frames, and reclaim front idlers, both straddle mount and original configuration.

We offer on-site lower works audits on component wear and condition, to determine best practice for maintenance and replacement of components to ensure your equipment remains mobile.


Your project could be next – contact us today to see what we can do for you.
Please feel free to contact us at any time.


21 Gateway Drive
Paget QLD 4740


07 4955 7888