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Heating System – Complete Cab Heating Solution for Sitrak C7H

The Heating System is an essential climate control component for the Sitrak C7H, providing efficient cabin heating and defrosting capabilities to ensure comfort and safety in cold weather conditions.

This comprehensive kit includes the H-Type Pressure Relief Valve, Heater Engine Outlet Pipe, Heater Engine Return Pipe, Heater Cab Inlet Pipe, Heater Cab Outlet Pipe, Heater Cab Return Pipe, Heater Pressure Relief Valve Return Pipe, Dual Pipe Clamp (Φ18), Spacer Plate, Heater Water Pipe Bracket, Type 2 Full Metal Hexagon Locknuts, Hexagon Flange Bolts M10, Wave Spring Clamps, Hexagon Flange Nuts M10, Large Washer, Hexagon Flange Nuts M6, H-Valve Bracket, Plastic Fastening Tape 7.6×368, Single Pipe Clamp (Φ15), Hexagon Flange Bolts M6, and Hexagon Flange Bolts M8. Each part is engineered to ensure reliable coolant flow and efficient heat transfer.

The Heating System utilizes engine coolant to generate warmth, distributing it through a network of hoses and a heater core inside the cab. The H-type pressure relief valve maintains optimal system pressure, while the various brackets and clamps secure all components for vibration-free operation.

For complete technical specifications and ordering details, please refer to the official Sinotruk Catalog, which provides comprehensive information on all available variants and compatible truck models.

The Heating System is designed for easy installation and long-lasting performance, ensuring that your cab remains warm and comfortable even in freezing temperatures. This Heating System is the ideal choice for owners who demand reliable cabin heating and defrosting.

Heating System

Component Details of Heating System

H-Type Pressure Relief Valve

This precision valve regulates coolant pressure within the heating system, preventing overpressure and ensuring stable flow. It features a spring-loaded diaphragm that opens at a preset pressure of 1.5 bar, protecting hoses and the heater core from damage.

Heater Engine Outlet Pipe

This formed rubber hose carries hot coolant from the engine to the heating system. Reinforced with fabric cord and resistant to temperatures up to 120°C, it ensures efficient heat transfer with minimal pressure drop.

Heater Engine Return Pipe

This return hose directs cooled coolant back from the heater core to the engine cooling system. It is designed with a smaller diameter for balanced flow and features a flexible section to absorb engine vibrations.

Heater Cab Inlet Pipe

This pipe delivers hot coolant from the engine bay into the cab, connecting to the heater core inlet. It is insulated to minimize heat loss and features a quick-connect fitting for easy installation.

Heater Cab Outlet Pipe

This outlet pipe carries coolant from the heater core back toward the engine compartment. It is routed along the firewall and secured with clips to prevent chafing and ensure a neat installation.

Heater Cab Return Pipe

This return pipe completes the circuit, sending coolant back to the engine after passing through the heater core. It is fitted with a check valve to prevent reverse flow when the engine is off.

Heater Pressure Relief Valve Return Pipe

This dedicated hose connects the pressure relief valve to the coolant reservoir, allowing excess fluid to return safely. It is made from transparent silicone for visual inspection of flow.

Dual Pipe Clamp (Φ18)

This clamp secures two 18mm diameter hoses together, maintaining proper routing and preventing tangling. It is made of stainless steel with a rubber-lined cushion to absorb vibration and reduce noise.

Spacer Plate

This flat metal plate acts as a spacer between the heater core and the cab floor, ensuring proper alignment and preventing metal-to-metal contact. It is zinc-plated for corrosion resistance.

Heater Water Pipe Bracket

This steel bracket mounts the heater pipes to the engine bay firewall, providing a secure anchor point. It features elongated slots for adjustable positioning and is coated with powder paint.

Type 2 Full Metal Hexagon Locknuts

These all-metal locknuts feature a deformed thread that provides prevailing torque to resist loosening under vibration. They are made of steel with a zinc-flake coating for durability.

Hexagon Flange Bolts M10

These M10 hexagon flange bolts are used to secure the heater core and brackets. The integrated flange distributes clamping load evenly, and the bolts are grade 10.9 for high strength.

Wave Spring Clamps

These spring-loaded clamps provide a secure, leak-proof connection on all coolant hoses. The wavy design maintains constant tension, compensating for thermal expansion and contraction.

Hexagon Flange Nuts M10

These M10 flange nuts are used in conjunction with the M10 bolts, providing a secure fastening with a large bearing surface. They include a nylon locking patch for added security.

Large Washer

This oversized flat washer is used under the head of a bolt to spread the load over a larger area, protecting soft materials. It is made of stainless steel for corrosion resistance.

Hexagon Flange Nuts M6

These M6 flange nuts are used for securing smaller brackets and components. They feature a built-in flange and a nylon insert to prevent loosening from vibration.

H-Valve Bracket

This bracket mounts the H-type pressure relief valve to the firewall. It is made of 3mm thick steel with a corrosion-resistant coating and includes rubber isolators to dampen vibration.

Plastic Fastening Tape 7.6×368

This self-locking cable tie is used to bundle and secure hoses and wires. It is 7.6mm wide and 368mm long, with a tensile strength of 80N, and is made of UV-stabilized nylon.

Single Pipe Clamp (Φ15)

This clamp secures a single 15mm diameter hose to the vehicle structure. It features a rubber cushion to prevent chafing and is made of stainless steel with a quick-release mechanism.

Hexagon Flange Bolts M6

These M6 hexagon flange bolts are used for lighter fastening duties, such as securing clamps and small brackets. They are grade 8.8 and zinc-plated for corrosion resistance.

Hexagon Flange Bolts M8

These M8 hexagon flange bolts provide medium-duty fastening for the main brackets and the heater core. The flange eliminates the need for separate washers and ensures even load distribution.

Product Parameters of Heating System

No. Part No. Name
1810W61967-0018H-Type Pressure Relief Valve
2YG9625530021Heater Engine Outlet Pipe
3YG9625530022Heater Engine Return Pipe
4712W61960-0005Heater Engine Return Pipe
5YG9625530024Heater Cab Inlet Pipe
6YG9625530025Heater Cab Outlet Pipe
7712W61960-0023Heater Engine Outlet Pipe
8YG9625530026Heater Cab Return Pipe
9YG9625530023Heater Pressure Relief Valve Return Pipe
10712W61941-0002Dual Pipe Clamp (Φ18)
11712W97488-0001Spacer Plate
12712W61941-0001Heater Water Pipe Bracket
13Q33208Type 2 Full Metal Hexagon Locknuts
14ZQ1841025Hexagon Flange Bolts M10
15YG9003981627Wave Spring Clamps
16YG9003981627Wave Spring Clamps
17YG9003981627Wave Spring Clamps
18ZQ32010Hexagon Flange Nuts M10
19Q40206Large Washer
20ZQ32006Hexagon Flange Nuts M6
21WG9325531971H-Valve Bracket
22811W97401-0631Plastic Fastening Tape 7.6×368
23WG9000365401Single Pipe Clamp (Φ15)
24ZQ1840625Hexagon Flange Bolts M6
25ZQ1840845Hexagon Flange Bolts M8

Why Choose Our Heating System?

Fast and Even Cabin Warming

The Heating System is designed to provide rapid warm-up and even heat distribution throughout the cab. The efficient heater core and optimized hose routing ensure that every part of the cabin reaches a comfortable temperature quickly, even in sub-zero conditions.

Reliable Pressure Regulation

The H-type pressure relief valve ensures that the Heating System operates within safe pressure limits, protecting the heater core and hoses from damage. This feature extends the life of the system and prevents costly leaks.

Complete Installation Hardware

This Heating System kit includes every clamp, bracket, bolt, and fastener needed for a full installation. The wave spring clamps and dual pipe clamps ensure secure connections and proper hose routing, eliminating guesswork and ensuring a professional result.

Optimized for Sitrak C7H

Every pipe, bracket, and clamp in this Heating System is precisely engineered to fit the Sitrak C7H chassis without modification. The pre-formed hoses and pre-drilled brackets align perfectly with factory mounting points, saving installation time and ensuring a leak-free system.

Online Catalog of SINOTRUK Parts

Learn More

Our online catalog provides comprehensive access to genuine SINOTRUK parts for all major vehicle lines — including HOWO, Sitrak, Steyr, and Yellow River series trucks. You can browse detailed specifications, original part numbers, and exploded-view diagrams for every assembly. Whether you are performing routine maintenance or planning a major overhaul, the catalog helps you quickly identify the correct components for your vehicle. When you become a SINOTRUK customer, we offer complimentary full‑access catalog services, ensuring you always have the latest product data and interchangeability information at your fingertips to support efficient fleet management and accurate parts ordering.

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