Komatsu PC350-8

The Komatsu PC350-8 is a 35-ton class hydraulic excavator. For a standard used unit, the operating weight ranges from approximately 32,600 kg to 32,960 kg . The machine is powered by the Komatsu SAA6D114E-3 engine, which delivers 184 kW (246 HP) at 1,950 rpm . The standard bucket capacity is 1.4 m³ (heaped), although it can be equipped with buckets up to 2.3 m³ depending on the material density .

Key dimensional data for logistics (shipping) planning:

• Overall length: Approx. 11,400 mm

• Overall width: Approx. 3,190 mm

• Tail swing radius: 3,550 mm

Based on operational data and industry standards, the Komatsu PC350-8 consumes between 23 to 28 liters per hour (6.0 to 7.4 gallons/hr) under normal digging conditions. The machine features a large 605-liter (160-gallon) fuel tank, allowing for approximately 20-24 hours of continuous operation on a single fill .

Efficiency Tip: The PC350-8 is equipped with Komatsu’s CLSS (Closed Center Load Sensing System) hydraulic system. Unlike conventional systems that waste fuel via orifice control, CLSS pumps oil only when required. This results in 10-15% lower fuel consumption compared to previous models or competitors in the same weight class .

When inspecting a used Komatsu PC350-8, buyers should focus on three specific areas based on field repair data:

1. Hydraulic Pump (Main Pump): The most frequently reported issue is the seizure of the swashplate or pistons. This often occurs due to aeration (air in the hydraulic lines) or lack of lubrication during initial startup after maintenance. Technicians recommend checking for “LS (Load Sensing) pressure” alignment; incorrect LS pressure can cause the swashplate angle to be too large, grinding the pistons .

2. Engine Speed Sensor: A common cause of “slow action” or “no power” (derating) is a faulty engine speed sensor, causing the computer to misread RPMs.

3. Undercarriage: Given the 35-ton weight, check the track chain tension and bushing wear. Standard track shoe width is 600 mm .

For the Komatsu PC350-8, the average service life ranges from 10,000 to 15,000 hours before requiring a major overhaul, provided the machine has been maintained according to Komatsu’s standards .

• Low Hours (Under 5,000 hrs): Considered “low usage.” The machine is likely still under extended warranty or just breaking into its peak performance phase .

• Medium Hours (5,000 – 8,000 hrs): The sweet spot for value buying. The undercarriage may need attention, but the engine and hydraulics are typically very strong.

• High Hours (Over 10,000 hrs): Acceptable only with verifiable service records. At this stage, buyers should budget for potential hydraulic pump rebuilds or swing motor maintenance.

While the newer PC350-11 offers Tier 4 Final emissions technology, the Used PC350-8 remains a global favorite for aftermarket sales due to three factors:

1. Emissions Simplicity: The PC350-8 uses the SAA6D114E-3 engine (Tier 3 equivalent). It does not require a DPF (Diesel Particulate Filter) or DEF (AdBlue) fluid. This makes it cheaper to run and maintain in developing countries where low-sulfur fuel quality varies .

2. No Komtrax Lock: Many older -8 series units do not have the regional locking features of newer models, making them easier to export and operate globally without dealer unlocking fees.

3. Repair Costs: Parts for the -8 series are widely available aftermarket, making repair costs significantly lower (approx. 20-30% cheaper) than the current generation models .