Cat's sideboom pipelayers are built on the same crawler tractor chassis as their bulldozers — a D8-class undercarriage with a boom, hardbar, and counterweight assembly bolted to the side, giving pipeline crews a stable, high-capacity lifting machine for setting pipe sections into trenches. The 583 and 594, in particular, remain widely used across pipeline construction decades after their original production, similar to how Komatsu's discontinued LW250 crane still works active sites — these are long-lived, mechanically simple machines that keep running with the right parts support.
Pipelayer Series — Capacity & Pump Reference
| Series | Max Lift Capacity | Engine | Pump Type |
|---|---|---|---|
| 583 / 583K | 64,000 kg / 140,000 lb | D353 | Gear pump (2P-9239 family) |
| 594 / 594H | 90,000 kg / 200,000 lb | D353 | Gear pump (2P-9239 family) |
| 587 / 589 | Mid-range, between 583 and 594 | D343/D353 | Gear pump — confirm from data plate |
Cat revised part numbers across production years and conversions (including third-party CPX/SP hydraulic upgrade kits fitted to some units). WhatsApp your machine's serial number and current pump part number for a precise match.
What Our Refurbishment Covers
Measured against Caterpillar tolerance and replaced where worn — the primary source of reduced boom lift force.
Replaced as standard — especially important given the age of most units in service.
Tested to confirm smooth, controllable boom lift/lower and winch response under load.
Actual output measured and documented on the written test report before dispatch.
Why Pipeline Contractors Choose PumpGrid
A Genuine Solution for a Discontinued Machine
New Cat pipelayer pumps are not something a modern dealer stocks off the shelf for a machine this old. Refurbishment keeps your pipelayer working without an impossible parts search.
Cost-Effective for a Fully-Depreciated Asset
A pipelayer this age has already paid for itself many times over. A refurbished pump is a fraction of the cost of replacing the whole machine.
Documentation for Pipeline Project Compliance
Pipeline contracts often require maintenance and safety records for lifting equipment. Our written test report supports that.
3-Month Warranty, Confirmed in Writing
If the pump fails due to a refurbishment defect within warranty, we replace it — not repair it.
Pipelayer Pump Warning Signs
Given the age of most units in service, WhatsApp us your machine's hours and history along with symptoms for an honest assessment.