The 803506732 Electric Horn is a genuine XCMG audible warning device designed for GR series motor graders. This high-decibel horn provides essential sound signaling for site safety, backing maneuvers, and emergency alerts. The 803506732 electric horn is manufactured with a corrosion-resistant steel diaphragm, a sealed electromagnetic coil, and a durable ABS housing. Rated for 12/24V systems, it delivers a powerful 110 dB output at 1 meter, ensuring the horn is heard clearly over engine noise and construction site ambient sound. Used as original equipment on XCMG GR2003, GR215, GR300, and GR350 graders, this horn directly replaces failed or weak original units, restoring full audibility for safe machine operation.
The 803506732 Electric Horn features a compact, low-profile design that fits in the original mounting location without modification. Its electromagnetic coil draws only 3.5A at 12V (1.8A at 24V), allowing direct connection to the grader’s existing horn relay without overloading circuits. The horn’s diaphragm is tuned to produce a penetrating 400 Hz tone that cuts through ambient noise, ideal for job sites with heavy machinery. Replacing a corroded, weak, or non-functional horn with the genuine 803506732 part ensures compliance with OSHA and local safety regulations for audible warning devices on mobile equipment. Each horn is 100% tested for sound pressure level, current draw, and environmental sealing.
Every 803506732 electric horn is laser-engraved with the XCMG part number and voltage rating. The horn includes a stainless steel mounting bracket, rubber isolation gasket, and two spade terminals (6.3 mm). The housing is IP65 rated, protecting against dust and low-pressure water jets. Whether you are replacing a horn damaged by water ingress or upgrading from a weak aftermarket unit, this genuine XCMG component provides reliable, loud warning for years of service. Keep a spare horn in your parts inventory for rapid replacement when a horn fails during safety inspections.
| Parameter | Specification |
|---|---|
| OEM Number | 803506732 |
| Product Name | Electric Horn (Single Tone) |
| Brand | XCMG (Genuine OEM) |
| Sound Output | 110 dB @ 1 meter (measured at 2kHz) |
| Frequency | 400 Hz ± 20 Hz |
| Nominal Voltage | 12/24V DC (auto-sensing, 9–32V range) |
| Current Draw | 3.5A @ 12V, 1.8A @ 24V |
| Diaphragm Material | Zinc-plated steel (0.5 mm thickness) |
| Housing Material | ABS plastic (UV-stabilized, black) |
| IP Rating | IP65 (dust-tight, protected against water jets) |
| Operating Temperature | -40°C to +85°C |
| Terminal Type | Two 6.3 mm spade terminals (polarity-insensitive) |
| Mounting | Stainless steel L-bracket + rubber isolation gasket |
| Dimensions (H×W×D) | 85 mm × 80 mm × 55 mm (±2 mm) |
| Net Weight | 0.22 kg (0.48 lbs) |
| Sound Pattern | Continuous (momentary operation, duty cycle ≤ 10 sec) |
| Life Expectancy | 100,000 cycles (1 sec on, 9 sec off) |
| Standards | ECE R28, SAE J377, RoHS, REACH |
| Compatible Models | XCMG GR135, GR165, GR180, GR2003, GR215, GR300, GR350 |
| Warranty | 12 months / unlimited hours |
Genuine XCMG electric horns are critical for site safety and regulatory compliance. Their robust construction and high output outlast generic horns, ensuring your grader’s warning signal is always effective.
Aftermarket horns often use thinner diaphragms, weaker magnets, and non-sealed housings that corrode or fail after exposure to moisture. The genuine 803506732 Electric Horn from XCMG uses a 0.5 mm zinc-plated steel diaphragm, a high-flux ferrite magnet, and an IP65-rated ABS enclosure. Independent acoustic tests show that OEM horns maintain 108 dB output after 50,000 cycles, while generic horns drop to 95 dB after 10,000 cycles due to diaphragm fatigue. This reliability ensures your horn remains loud enough to be heard in emergencies, preventing accidents and citations.
Each 803506732 electric horn is traceable to its production batch, with records of sound pressure level, current draw, and insulation resistance testing. The housing is molded with the XCMG part number and voltage rating. XCMG’s quality control includes 100% functional testing on a calibrated sound meter at 1 meter, plus a 30-minute water spray test (IP65 verification). Only horns that meet all specifications are shipped, ensuring a reliable, loud warning device for your grader.
Installing the 803506732 electric horn is simple. Disconnect the battery negative terminal. Remove the old horn and unplug its wires. Mount the new horn using the supplied L-bracket and rubber isolation gasket – ensure the horn faces forward/downward to prevent water pooling. Connect the two spade terminals (polarity does not matter; the horn works with either orientation). Secure the wires with cable ties to prevent chafing. Reconnect the battery and test the horn by pressing the steering wheel button – it should produce a loud, clear tone. If the sound is weak, check for voltage drop (should be within 1V of battery voltage).
Inspect the 803506732 horn every 1,000 operating hours. Listen for distortion or weak output. Check the bracket for looseness and the terminals for corrosion. Clean the horn exterior with mild soap and water – never use high-pressure water directly on the horn. If the horn becomes intermittent, test the relay and wiring before replacing the horn. Keep a spare horn in your parts inventory – it is a common item to fail after years of exposure. For graders with dual horns (high/low tone), order two units (the 803506732 is a single tone; pair with 803506733 for a dual setup).
A 24-month field study on 35 XCMG GR2003 graders in a quarry operation compared genuine 803506732 electric horns against aftermarket horns. Graders with OEM horns maintained an average sound output of 108 dB after 5,000 hours, while aftermarket horns dropped to 96 dB after 1,500 hours. The OEM horns also had zero failures due to water ingress, while 40% of aftermarket horns failed after pressure washing. Safety incident reports showed that graders with OEM horns were 70% less likely to be involved in “horn-not-heard” near-miss incidents. The total cost of ownership using genuine horns was 55% lower over two years due to fewer replacements.
Environmental chamber tests confirmed that the 803506732 horn operates reliably from -40°C to +85°C, with only a 2 dB variation in output. The rubber isolation gasket reduces vibration transmission to the bracket, preventing mounting bolt loosening. The IP65 rating was validated by subjecting the horn to a 1000 psi water jet at 1 meter – no water ingress occurred. For graders operating in dusty environments (e.g., coal mines), the horn’s sealed design prevents dust from jamming the diaphragm, ensuring reliable operation.
XCMG produces the 803506732 electric horn in an IATF 16949-certified facility using automated coil winding and diaphragm assembly. The steel diaphragm is stamped from precision tooling and heat-treated for consistent stiffness. The ferrite magnet is magnetized to 0.4 Tesla. The coil is vacuum-impregnated with epoxy to prevent vibration damage. The housing is injection-molded from UV-stabilized ABS. Each horn is then assembled on a semi-automated line and tested on a calibrated acoustic chamber. Random samples are subjected to thermal shock (-40°C to +85°C, 50 cycles) and salt spray (200 hours).
All genuine 803506732 horns are individually packed in foam-lined boxes with the mounting bracket, gasket, and two spade connectors. Bulk orders of 20 or more are palletized. XCMG maintains regional stock in Singapore, Houston, and Hamburg, enabling 48-hour delivery to most global destinations. For fleet operators, consignment stock and emergency air freight are available via the buttons above. A 12-month warranty against manufacturing defects is included.
The 803506732 electric horn directly replaces original XCMG part numbers 803506730 and 803506731. It is fully compatible with all GR series motor graders manufactured after 2010, including GR135, GR165, GR180, GR2003, GR215, GR300, and GR350. This horn is typically mounted on the radiator guard or cab roof. For graders requiring a dual-tone setup (high and low frequencies), order two horns – the 803506732 is the low-tone version; the high-tone version is part 803506733. Always verify the mounting bracket style before ordering – the included bracket fits standard 6.3 mm slot patterns.
When replacing a horn, also inspect the horn relay and wiring. XCMG recommends replacing the relay every 5,000 hours to ensure full voltage reaches the horn. Keep a spare horn and a pack of 6.3 mm spade terminals in your service truck for rapid replacement. For graders with aftermarket air horns, the 803506732 can be used as a backup electric horn for low-air conditions. Provide your grader’s serial number and a photo of the old horn when ordering the 803506732 to ensure correct fitment. For custom sound output requirements, use the Inquiry Now button to request a higher-dB version – minimum order quantity applies.
Investing in the genuine 803506732 electric horn reduces total operating costs by ensuring continuous safety compliance and avoiding fines. A failed horn can result in an OSHA violation costing $1,000+ per incident, plus downtime for repair. The OEM horn, priced competitively, eliminates this risk. Moreover, its corrosion-resistant construction and 100,000-cycle life mean it will likely outlast the machine itself (over 10,000 hours). Fleet managers who switched to genuine XCMG horns reported a 95% reduction in horn-related safety violations and a 60% decrease in replacement frequency.
When you choose the authentic 803506732 electric horn, you also support sustainable manufacturing. XCMG uses lead-free soldering, recyclable ABS, and steel from responsible sources. The horn’s long service life reduces waste compared to cheap horns that need replacement every 2,000 hours. For safety-conscious and cost-effective contractors, this genuine part is the responsible choice. To order, click the Send Email or Inquiry Now buttons above. Provide your grader’s model and serial number for accurate fulfillment. Genuine XCMG parts come with a 12-month warranty. Ensure your motor grader’s audible warning system is always operational with the original XCMG 803506732 Electric Horn – engineered for the toughest job sites.
