Thermostat 129155-49801 Fit for Yanmar 3D84E 3D88E 4D88E Komatsu PC35R-8 PC45R-8

Thermostat 129155-49801 for Yanmar and Komatsu

This thermostat (OEM cross-reference 129155-49801) regulates engine coolant temperature for optimal performance in Yanmar 3D84E, 3D88E, 4D88E and Komatsu PC35R-8, PC45R-8 machines.

Overview

This aftermarket thermostat is engineered to control coolant flow and maintain consistent engine operating temperature. Replacing a worn thermostat ensures proper warm-up and prevents overheating in Yanmar and Komatsu compact excavators and engines. The 129155-49801 part is a direct-fit replacement for the original equipment component.

Built For Performance

• Wax-pellet design opens at precise temperature for accurate regulation
• Rugged brass and stainless steel construction resists corrosion
• Sealed housing prevents coolant leakage and air locks
• Direct-fit replacement with no modifications required
• Rated for high-temperature engine environments

Fits These Machines

• for Yanmar 3D84E engine
• for Yanmar 3D88E engine
• for Yanmar 4D88E engine
• for Komatsu PC35R-8 excavator
• for Komatsu PC45R-8 excavator

On-The-Job Use

• Construction excavation and trenching
• Landscaping and site preparation
• Agricultural tractor and implement operation
• Industrial material handling equipment

Specs At A Glance

Good To Know

Q: Is this thermostat a direct replacement for the OEM part? A: Yes, this thermostat matches the specifications of the original 129155-49801 and installs without any modifications.

Q: What happens if the thermostat fails? A: A failed thermostat can cause engine overheating or poor warm-up, leading to reduced efficiency and potential damage; replacing it promptly restores proper temperature control.

Slight variation in finish or dimensions may occur between production runs, and confirm compatibility before ordering.