Excavators, wheel loaders and dozers: turbo rebuild service

Cat C7 / C7 ACERT excavators and loaders (BorgWarner S200AG, Garrett GT2560S VNT)

Caterpillar

The Cat C7 powers 320-class through 336-class excavators, 950-class loaders, forestry equipment and more. Pre-ACERT machines run the BorgWarner S200AG under Cat 178482 (crosses 0R1795, 10R0580). The C7 ACERT added a VNT mechanism that sticks with soot, exactly like the on-highway version. Tier 4 C7.1 machines move to the Garrett GT2560S under Cat 479-5828 / 461-1109 / 457-3636. All rebuildable, VNT mechanism service included.

Cat C9 / C9 ACERT (BorgWarner S310CG)

Caterpillar

The workhorse of the 330D/336D class. The BorgWarner S310CG under Cat 274-9989 (crosses 20R-2971, 13809880113) is the standard unit. Same rebuild process as every BorgWarner S-series on our bench, with the same VGT considerations on ACERT machines.

Cat C13, C15, C18 construction (ACERT twins, GT55, GT5518)

Caterpillar

Larger Cat equipment shares engine families with on-highway trucks: C13 and C15 ACERT twins (covered in depth on our Heavy Truck reference), and the C18 running a Garrett GT5518 in dozer and large loader applications. If you service Cat trucks and Cat iron, it is the same bench.

PC200 through PC450 (Holset HX35, HX40, Komatsu/Cummins power)

Komatsu

Komatsu excavators run Cummins-based power with Holset turbos on the PC200 through PC300 class: the PC200-7 uses an HX35 under Komatsu 6738-81-8090 (crosses 4038475, 4089711). Older PC200-5 and PC200-6 models run Garrett T04E and Holset T300 hardware. PC300 and PC400 class move up to HX40 and larger frames. All Holset, all rebuildable.

EC excavators and ZX Series

Volvo CE + Hitachi

Volvo CE excavators run Volvo D-series engines with Holset and BorgWarner turbos; Hitachi ZX machines use Isuzu power with IHI and Garrett units. Both share turbo families with their on-highway siblings. Tag photos identify the exact unit.

Deere construction and Kobelco SK Series

Deere + Kobelco

John Deere construction equipment shares PowerTech engines and Schwitzer/BorgWarner turbos with the ag line, covered in depth on our Agricultural reference. Kobelco SK excavators run Hino and Mitsubishi power with MHI and IHI turbo families.

Dust and debris ingestion

Construction sites generate the worst airborne particulate of any operating environment. Poorly maintained air filtration, cracked intake boots, and unsealed filter housings sandblast compressor wheels at operating speed. Inspect the entire intake tract when installing a rebuilt unit.

High idle hours cooking centers

Excavators and loaders idle for hours between work cycles, and operators shut down without cool-down. Oil bakes in the center section, and the next start runs coked passages. Short idle-down habits and sensible oil intervals double turbo life.

VNT/VGT sticking on ACERT and tier 4 machines

Carbon from EGR systems cements variable geometry vanes exactly like on-highway trucks: derates, limp mode, and actuator damage. Mechanism cleaning and actuator evaluation usually restore them without a full assembly.

Hydraulic heat loading

Construction equipment runs hydraulic systems that add significant heat to the engine bay beyond what a truck sees. The turbo lives in that combined heat envelope, and center section coking arrives earlier than on equivalent truck engines.

Contaminated oil from engine wear

High-hour machines with worn rings push soot and blow-by into the oil, and the turbo bearings are downstream. By the time the turbo fails, the oil was the problem. Address the oil quality and engine condition with every turbo rebuild.

Previous rebuilds and cheap replacements

Jobsite pressure to get iron running leads to fast, cheap turbo replacements that fail again. No balancing, wrong clearances, and unverified parts. Every unit we build is VSR balanced and documented.