The 803742957 Fuse Box is a genuine OEM power distribution center manufactured by XCMG for motor graders and heavy construction equipment. This integrated fuse and relay box consolidates all circuit protection for the cab, engine, lights, and auxiliary systems into one sealed, serviceable unit.
Designed to withstand extreme vibration, moisture, temperature swings, and chemical exposure, the 803742957 fuse box features a weather-resistant IP65 cover and high-temperature housing. It directly replaces cracked, melted, or corroded fuse boxes on XCMG GR series graders and compatible machinery.
Each unit accommodates up to 20 blade-type fuses (mini and ATO) and 6 ISO mini relays, with clearly labeled circuits. The integrated bus bars are made of tinned copper for low resistance and corrosion protection. This ensures reliable power distribution and simplifies electrical troubleshooting.
| Parameter | Specification |
|---|---|
| OEM Number | 803742957 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Integrated Fuse and Relay Box (Power Distribution Center) |
| Fuse Types Accepted | Mini blade (ATM) and ATO (regular) – up to 20 positions |
| Relay Types Accepted | ISO mini relay (4 or 5 pin) – up to 6 positions |
| Maximum Fuse Rating per Circuit | 30A (mini), 40A (ATO) |
| Main Bus Bar Rating | 150A continuous (tinned copper) |
| Input Power Terminal | Single M8 stud (battery positive), includes protective cap |
| Ground Terminal | M6 stud (chassis ground) |
| Output Connectors | 2 x 24-pin sealed Deutsch connectors (engine and cab harness) |
| Cover Type | Transparent polycarbonate with gasket seal (IP65 rated when closed) |
| Housing Material | PBT-GF30 (30% glass-filled), UL94 V-0 flame retardant |
| Operating Temperature | -40°C to +105°C |
| Ingress Protection (closed) | IP65 (dust-tight, protected against water jets) |
| Corrosion Protection | 500+ hours salt spray (ASTM B117) on bus bars and terminals |
| Vibration Resistance | 20g (10-500Hz) per ISO 16750-3 |
| Dimensions (L × W × H) | 210 mm × 150 mm × 85 mm (approx.) |
| Mounting | 4 x M6 bolts (mounting holes on base) |
| Circuit Identification | Laser-etched label on cover and internal circuit map |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350 motor graders |
| Superseded Part Numbers | 803742501, 803742712, 803742889, 803742901 |
| Certifications | CE, RoHS, ISO 9001:2015, IATF 16949 |
The XCMG 803742957 Fuse Box is the nerve center of your grader’s electrical system. It consolidates all fuses and relays for lighting, engine control, transmission, HVAC, wipers, and auxiliary equipment into one accessible, weather-protected enclosure. This design simplifies troubleshooting, reduces wiring complexity, and improves reliability.
Unlike aftermarket fuse holders that leave circuits exposed to moisture and vibration, the 803742957 features a sealed transparent cover with a rubber gasket. The IP65 rating ensures that dust, rain, and pressure washing cannot penetrate the enclosure. This is critical for graders operating in muddy construction sites, mining pits, or snowy road maintenance routes.
The internal bus bars are made of heavy-gauge tinned copper, which resists corrosion and provides low voltage drop even at full load. The main power input accepts an M8 battery cable, and the distribution is split into two 24-pin Deutsch connectors for the cab and chassis harnesses. This modular approach allows quick replacement of the entire fuse box without cutting wires.
Over time, original fuse boxes can suffer from cracked housings (due to vibration and UV exposure), melted plastic (from loose connections), or corroded terminals (from moisture ingress). The 803742957 is a direct physical and electrical replacement for the factory unit on XCMG GR series motor graders from 2010 onward.
Installation requires disconnecting the battery, removing the old fuse box, and transferring the fuses and relays to the new unit (or using new ones). The mounting holes align with the existing bracket, and the two Deutsch connectors are keyed to prevent misconnection. The entire replacement takes about 30 minutes for a trained technician.
Common failure symptoms: intermittent electrical issues, blown fuses for no apparent reason, melted fuse holders, visible corrosion on terminals, or water inside the cover. Replacing the fuse box with a genuine XCMG unit restores reliable circuit protection and eliminates electrical gremlins.
XCMG engineers designed the 803742957 fuse box to survive the harshest conditions found in off-highway equipment. The housing is molded from PBT-GF30 (glass-reinforced polyester), which maintains its strength from -40°C to +105°C and resists diesel, hydraulic fluid, and battery acid. The material is UL94 V-0 rated, meaning it will self-extinguish in case of an electrical fire.
The internal terminals are made of brass with tin plating, and each terminal is individually tested for retention force (>50 N). The bus bars are ultrasonically welded to the terminals, eliminating cold solder joints. The cover’s hinge is reinforced for thousands of open/close cycles, and the latch mechanism stays secure even under vibration.
Each production batch is subjected to 500 hours of salt spray (ASTM B117), 100 thermal shock cycles from -40°C to +105°C, and 20g vibration for 24 hours. The fuse box is also tested for dielectric strength (1500V AC for 1 minute) and insulation resistance (>100 MΩ). This ensures that the 803742957 will outlast the original equipment.
Aftermarket fuse boxes often use inferior plastics that become brittle in cold weather, cracking and allowing moisture inside. They may also have undersized bus bars that overheat under normal loads, causing voltage drop and melted housings. The genuine XCMG unit is engineered to match the original electrical load calculations for your grader.
Counterfeit fuse boxes may lack the proper circuit labeling, making troubleshooting difficult. The 803742957 includes a laser-etched circuit map on the inside of the cover, identifying each fuse and relay position. Additionally, genuine XCMG boxes include spare fuse slots and a fuse puller.
XCMG provides a 12-month unlimited-hour warranty against manufacturing defects. Each fuse box is serialized for traceability. Protect your grader’s electrical system with genuine components – the cost of a failed fuse box is minimal compared to the cost of a wiring harness fire.
If you experience recurring blown fuses, inspect the fuse box for signs of corrosion or melting. Use a multimeter to check voltage drop across each fuse terminal (should be <0.1V). High drop indicates a poor connection. Also, verify that the correct amperage fuses are installed – oversized fuses can cause wiring damage.
Periodically open the cover and inspect for moisture, dirt, or insect nests. Clean with compressed air and apply dielectric grease to the terminals if desired. Tighten the main input nut (M8) to 15 Nm and the ground nut (M6) to 10 Nm every 1,000 operating hours.
If a relay clicks but the associated device does not work, swap the relay with a known good one from a non-critical circuit. If the problem moves, the relay is faulty. If not, suspect the fuse box terminal or the wiring. Replace any corroded or loose terminals immediately.
The 803742957 Fuse Box is stocked in XCMG’s regional warehouses in North America (Houston), Europe (Rotterdam), Middle East (Dubai), and Asia (Shanghai). Standard air freight delivers within 3-7 business days worldwide. Expedited shipping (1-2 days) is available for urgent repairs.
Bulk orders (5+ pieces) receive volume discounts and can be shipped via sea freight. Each fuse box is individually packaged with anti-static foam and a desiccant bag. For large mining or government fleets, consignment stock programs are available to ensure immediate availability.
Don’t let a compromised fuse box cause intermittent breakdowns or electrical fires. Order the genuine XCMG 803742957 Fuse Box today and restore reliable power distribution to your motor grader. Genuine quality, perfect fit, and long-term durability – designed for the toughest jobsites.
The 803742957 Fuse Box is an essential component for maintaining your XCMG motor grader’s electrical reliability. A clean, dry, and properly fused power distribution center prevents downtime, reduces troubleshooting time, and protects expensive ECUs and sensors from voltage spikes.
Upgrade or replace your damaged fuse box today. The XCMG 803742957 offers superior sealing, corrosion-resistant bus bars, and clearly labeled circuits – everything you expect from original equipment. Order now and keep your grader productive and safe in any environment.
