3968559 Thermostat

The 3968559 thermostat is a core temperature control component for, widely installed on heavy-duty trucks, loaders, excavators and various construction machinery. As a key part of the engine cooling system, this thermostat accurately controls coolant circulation and regulates engine operating temperature. It effectively prevents engine overheating or low-temperature wear, ensures the engine runs within the optimal temperature range, and improves combustion efficiency and overall working stability. Adopting high-sensitivity thermal sensing components and high-temperature resistant shell materials, it features fast response, stable opening temperature and strong fatigue resistance. Manufactured strictly in accordance with OEM technical standards, the 3968559 thermostat achieves 100% dimensional and functional interchangeability for direct replacement and daily engine maintenance.

• Part Number: 3968559
• Product Name: Engine Thermostat / Cooling System Thermostat
• Application: Heavy-Duty Trucks, Wheel Loaders, Excavators, Road Rollers, Engineering Machinery
• Core Features: Precise temperature control, high sensitivity, heat resistance, stable performance, OEM direct fit
• Function: Adjust engine coolant circulation, stabilize operating temperature, protect engine and improve working efficiency

Each 3968559 thermostat is individually wrapped with shockproof and moisture-proof materials to protect internal precision sensing parts. Independent neutral inner boxes and thickened drop-resistant export cartons are used for outer packaging. Pallet packaging is available for bulk orders. We support standard neutral export packaging and custom logo packaging to meet global wholesale and distribution demands.

Standard wholesale MOQ: 50 PCS. 1–5 PCS sample orders are supported for quality inspection and performance testing. Mixed container loading with other construction machinery and truck spare parts is acceptable to reduce customers’ comprehensive procurement and logistics costs.

In-stock products: 3–7 working days after deposit confirmation. Bulk production orders: 15–25 working days depending on order quantity. Rush orders can be prioritized through prior negotiation.

All 3968559 thermostats pass strict factory temperature calibration, high-temperature resistance and durability tests. Our products hold ISO9001 quality system certification and CE certification, fully complying with global mechanical industry standards and cross-border customs clearance requirements.

• Strict OEM standard parameters, accurate opening temperature, plug-and-play installation without modification
• High-precision thermal sensing core, sensitive and stable temperature regulation
• High-temperature resistant and anti-aging materials, long service life
• Effectively solves engine overheating, high fuel consumption and unstable operation problems
• Adaptable to harsh working environments of construction machinery and heavy trucks
• Factory direct supply, sufficient stock and competitive wholesale price
• 12-month quality warranty for production defects
• Flexible international payment terms: T/T, L/C at sight
• Support private label customization and exclusive export packaging

HES Co., Ltd is a company specializing in engineering machinery parts and Sinotruk Shacman truck components. Over the years since its establishment, the company has maintained excellent collaborations with multiple manufacturers such as XCMG, SDLG, Sinotruk, and Shacman. Adhering to the principles of "Quality First, Customer Supremacy, Credibility, and Win-Win Cooperation," we are committed to sincerely cooperating with all clients and pursuing mutual development.