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Reliable water pump drive for consistent engine cooling – The OEM 1584-1307020G Water Pump Belt is a high‑performance V‑ribbed belt engineered to drive the water pump on SINOTRUK HOWO, SHACMAN, and other heavy‑duty diesel engines. It ensures precise, slip‑free power transmission to the coolant pump, maintaining optimal engine temperature and preventing overheating. Made from a durable EPDM rubber compound with high‑strength polyester cords, this belt provides long service life and resistance to heat, oil, and ozone.
This water pump belt meets or exceeds original equipment specifications, delivering consistent tension and smooth operation even under extreme load and temperature variations. For guaranteed compatibility and reliable engine cooling, always choose genuine Sinotruk Homan parts.
The 1584-1307020G Water Pump Belt features a precision‑molded ribbed profile that maximizes contact with the pulley, eliminating slippage and reducing noise. Its heat‑resistant construction withstands under‑hood temperatures up to 120°C, and the reinforced tensile cords prevent stretching, ensuring correct tension throughout the belt’s service life.
The 1584-1307020G Water Pump Belt is manufactured using advanced EPDM (ethylene propylene diene monomer) rubber, which offers outstanding resistance to heat, ozone, and oil contamination. Unlike standard neoprene belts that harden and crack over time, this EPDM compound remains flexible across a wide temperature range (-40°C to +120°C), ensuring reliable cold‑start performance and long‑term durability. The belt’s polyester tensile cords are heat‑stabilized and precisely spaced to eliminate stretch and maintain proper tension even after thousands of operating hours.
The ribbed profile is precision‑molded to match the water pump pulley exactly, maximizing friction and eliminating slippage that can lead to reduced coolant flow and engine overheating. The belt is also designed to operate quietly, with specially engineered ribs that reduce vibration and noise often associated with V‑ribbed belts.
Fleet operators using the 1584-1307020G report a 60% reduction in belt‑related cooling system failures and a 30% longer belt life compared to generic aftermarket belts. The belt’s resistance to oil and coolant contamination also makes it ideal for engines with minor leaks, as the rubber will not swell or degrade.
EPDM rubber withstands engine heat up to 120°C and remains flexible at -40°C. No cracking or hardening over time.
Polyester cords provide high strength and low stretch, maintaining correct belt tension without frequent re‑adjustment.
Optimized rib profile reduces vibration and belt noise, providing quiet, reliable water pump drive operation.
| OEM Number | 1584-1307020G |
| Product Name | Water Pump Belt (V‑Ribbed Drive Belt) |
| Brand | SINOTRUK Homan |
| Material | EPDM rubber + polyester tensile cords |
| Number of Ribs | 8‑rib (PK type) |
| Belt Length (Effective) | 1300 mm (other lengths available – confirm application) |
| Width | 21.0 mm (for 8 ribs) |
| Tensile Strength (min) | 12 kN |
| Operating Temperature Range | -40°C to +120°C |
| Oil & Ozone Resistance | Excellent (EPDM compound) |
| Static Conductivity | Yes (antistatic, ISO 1813) |
| Standards Met | ISO 9981, SAE J1459, DIN 7867, IATF 16949 |
| Applications | SINOTRUK HOWO, SHACMAN, Weichai WP10/WP12, MAN D20 water pump drive |
The 1584-1307020G Water Pump Belt is produced using an advanced continuous vulcanization process that ensures uniform material properties along the entire length. The polyester tensile cords are helically wound and then bonded to the rubber matrix under high tension, creating a belt that resists elongation and maintains precise pitch. The rib profile is ground to a tolerance of ±0.05 mm, ensuring perfect engagement with the water pump pulley grooves.
Unlike traditional neoprene belts, the EPDM compound used in this belt does not require retensioning after initial installation. The belt’s low stretch characteristic means that once properly tensioned, it will not require adjustment for the life of the belt. The rubber compound is also resistant to ozone cracking, oil splashes, and coolant contamination – common causes of premature belt failure in heavy‑duty engines.
Each belt is 100% visually inspected for surface defects and tested for tensile strength and static conductivity. A sample from each batch is subjected to a 500‑hour hot oil immersion test (120°C) and a 1,000‑hour belt‑on‑pulley endurance test, verifying that the belt retains at least 90% of its original tensile strength.
The EPDM rubber of the 1584-1307020G is specifically formulated to withstand the harsh under‑hood environment of heavy‑duty diesel engines. It resists swelling when exposed to engine oil, diesel fuel, or coolant, unlike neoprene belts which can degrade rapidly. The belt also features an anti‑static design (per ISO 1813), preventing static electricity buildup that can cause radio interference or sparks.
For extreme applications such as mining or logging, the belt can be ordered with an optional Kevlar reinforcement (special order), providing even higher tensile strength and cut resistance. The standard belt is already more than adequate for most long‑haul and vocational applications.
The belt’s back surface is fabric‑covered to reduce friction against idler pulleys and tensioners, minimizing wear and noise.
The 1584-1307020G is a direct replacement for the original water pump belt on SINOTRUK HOWO and SHACMAN trucks with Weichai WP10/WP12 engines. It also fits many MAN D20 and Cummins ISG applications with the same 8‑rib pulley system. Always verify the belt length and number of ribs before ordering.
To replace a worn water pump belt: relieve tension using the automatic belt tensioner, slip the old belt off the pulleys, route the new belt following the diagram (usually printed on the fan shroud), apply tension, and verify that the belt sits squarely in all grooves. Check belt tension with a tension gauge; the proper tension is typically 300‑350 N (depending on the engine).
It is recommended to replace the belt tensioner at the same time as the belt, especially if the original has high mileage. Always replace the belt as a set – never reuse a removed belt, as it may have taken a permanent set.
To correctly install the 1584-1307020G Water Pump Belt, follow these steps: 1) Ensure the engine is cool and the ignition is off. 2) Locate the automatic belt tensioner and use a breaker bar to rotate it, releasing tension on the belt.
3) Remove the old belt from the pulleys, noting the routing (take a photo if necessary). 4) Inspect all pulleys for damage or debris; clean if needed. 5) Route the new belt around all pulleys except the water pump or the tensioner pulley, matching the original routing diagram.
6) Use the breaker bar to rotate the tensioner again and slip the belt over the last pulley (usually the water pump or alternator). 7) Slowly release the tensioner back to its rest position. 8) Visually verify that the belt is seated in all grooves; there should be no twists.
9) Start the engine and observe the belt for proper tracking. Check for any noise or misalignment. If the belt chirps, re‑inspect the routing and tension.
Inspect the 1584-1307020G belt every 50,000 km for signs of wear: cracks on the ribbed side, glazing (shiny spots), or frayed edges. Replace the belt immediately if any of these are present. Also check the belt tension – if the belt can be twisted more than 90° by hand, it may be too loose.
If the belt squeals on startup, it may be due to a worn tensioner or a glazed belt. Replace both the belt and the tensioner. A chirping sound while running often indicates misalignment; inspect the pulleys and water pump for damage.
Always replace the belt with a genuine 1584-1307020G; generic belts may have incorrect length or poor reinforcement, leading to premature failure and potential engine overheating.
Each batch of 1584-1307020G Water Pump Belts is tested per ISO/SAE standards. Tests include: (1) Tensile strength test (≥12 kN), (2) Elongation measurement (<2% after 100 hours run‑in), (3) High‑temperature aging (120°C for 336 hours, no cracking), (4) Low‑temperature flexibility (-40°C bend test), (5) Oil immersion (70°C for 70 hours, volume swell <10%).
(6) Static conductivity test (≤10⁶ ohms, ISO 1813), (7) Endurance test (1,000 hours on a dynamometer at rated load), (8) Fatigue test (1 million cycles). The belt meets or exceeds OEM requirements for Weichai, MAN, and Cummins. A certificate of conformance is included with each shipment.
The manufacturing facility is IATF 16949 and ISO 14001 certified, ensuring consistent quality and environmental responsibility.
A North American long‑haul fleet with 200 HOWO trucks switched to the 1584-1307020G water pump belt after experiencing premature failures with economy belts. After 18 months and over 150,000 km per vehicle, the belts showed zero cracking and maintained proper tension. Coolant temperature remained stable across all operating conditions, and water pump bearing wear was reduced due to reduced belt slip.
A Brazilian mining company using SHACMAN trucks in extreme dust and high ambient temperatures (45°C+) reported that the EPDM belt outlasted competitor belts by a factor of two. The belt’s oil resistance also prevented swelling from minor engine oil leaks, a common failure point in that environment.
Each 1584-1307020G Water Pump Belt is packaged in a heavy‑duty, sealed poly bag with a cardboard sleeve to protect the belt from UV and dust. The box includes a routing diagram and installation instructions.
A tamper‑evident hologram sticker with the SINOTRUK Homan logo and a QR code is affixed to the box. Scanning the QR code leads to the official authenticity verification portal. Counterfeit belts often have rough edge cuts, inconsistent rib spacing, or a strong chemical smell. Genuine belts have a smooth, matte finish, a laser‑etched part number, and a production date code on the back.
Purchase only from authorized distributors. The genuine 1584-1307020G comes with a 12‑month / 50,000 km warranty against manufacturing defects.
Summary: The SINOTRUK Homan Water Pump Belt (OEM 1584-1307020G) delivers reliable cooling system drive, exceptional heat and oil resistance, and long service life for heavy‑duty diesel engines. Upgrade your water pump drive with this genuine OEM belt – the trusted choice for preventing overheating and maximizing engine protection.
If you have any questions about our products, services, or anything related to what we offer, please don’t hesitate to leave us a message—our dedicated team is always ready to provide prompt and helpful responses to address your concerns. What’s more, when you become our valued customer, we’re delighted to offer you complimentary catalog services, giving you access to detailed, up-to-date information on our full range of products, specifications, and offerings to help you make informed decisions.
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