Heavy Engineering · Since 1962 Sumitomo Brand Logo
Engineering R&D Center

Excavator Engineering, Verified on the Test Bench

Hydraulic flow rigs, slew-bearing fatigue tunnels, ROPS / FOPS drop-pin labs and Tier 4 Final emissions chambers — the Sumitomo proof stack behind every published dig envelope.

We will not publish a digging-depth chart we cannot reproduce on our structural load rig. — Chief Engineer, Sumitomo Excavator Division

Founded in 1962, Sumitomo builds crawler excavators for contractors who audit fuel intensity, hydraulic cleanliness and undercarriage life before they release capital. Across 380,000 m² of production area and 85 countries, application engineers still treat every working-range overlay as a laboratory claim first and a sales sheet second.

Six laboratory cells that protect fleet reliability claims

Each facility feeds design revisions into the excavator line before a model ships to quarry or highway projects.

Hydraulic flow and pressure test rig
Hydraulic flow rig — 450 LPM
Slew-bearing fatigue tunnel
Slew-bearing fatigue tunnel
ROPS FOPS drop-pin lab
ROPS / FOPS drop-pin lab
Tier 4 Final emissions chamber
Tier 4 emissions chamber
Boom and arm structural load lab
Boom & arm load lab
Track shoe wear track
Track-shoe wear track

Whitepapers from the Sumitomo engineering office

Tour the R&D center

Appointment-only visits for project engineers and fleet reliability teams. NDA recommended when reviewing unpublished dig-envelope data.