Nippon Sharyo DH508 Crane Idler for Crawler Crane Undercarriage
The Nippon Sharyo DH508 crane idler, also called a track idler wheel or front idler, is used to guide the crawler chain and help maintain proper track tension. It is an important replacement part for crawler crane undercarriage maintenance and repair.
Product Specifications
| Product Name | Nippon Sharyo DH508 Crane Idler / Track Idler Wheel |
|---|---|
| Machine Model | Nippon Sharyo DH508 |
| Part Type | Crane Idler / Front Idler / Crawler Crane Idler |
| Application | Nippon Sharyo crawler crane undercarriage repair and replacement |
| Material | 50Mn steel or according to technical requirement |
| Price Terms | EXW / FOB / CFR / CIF / DDU available according to order and shipment method |
Function of the DH508 Track Idler Wheel
The DH508 idler is installed at the front section of the crawler frame. It guides the track chain, supports track tension, and works together with track rollers, top rollers, sprockets, and track shoes. When the idler is worn or incorrectly matched, the crawler system may show loose track movement, side wear, abnormal noise, or repeated tension adjustment problems.
As a Track crane front idler supplier, SQ recommends confirming the idler by real dimensions instead of only using the machine model. Differences in outer diameter, shaft size, rim profile, and mounting area can affect installation even when two idlers look similar.
Why Choose SQ for Crane Undercarriage Parts
SQ supports overseas repair companies, equipment owners, distributors, and fleet service teams with replacement crawler crane components. As a Crawler crane undercarriage parts manufacturer, we can help check idlers, rollers, sprockets, and track shoes according to photos, drawings, samples, or part details.
Fitment checking before supply: Photos, samples, drawings, and measurements can be reviewed to reduce wrong-part risk.
Suitable for maintenance projects: The DH508 idler can be supplied for repair, spare parts stock, and distributor orders.
Related parts support: DH508 top rollers, track rollers, sprockets, and track shoes can be checked together.
Export packing available: Packing can be arranged according to part size, order quantity, and shipment method.
Related Crane Undercarriage Parts
For a DH508 repair project, the idler is often checked together with other crawler travel components. SQ can also review track rollers, carrier rollers, sprockets, and track shoes. If your fleet includes other crane brands, Hitachi crane track shoes can be checked separately by shoe width, pitch, bolt hole spacing, and machine model.
| Part Type | Common Name | Key Checking Points |
|---|---|---|
| Idler | Front Idler / Track Idler Wheel | Outer diameter, width, shaft size, rim profile, mounting position |
| Track Roller | Bottom Roller / Lower Roller | Roller diameter, flange type, shaft size, installation width |
| Top Roller | Carrier Roller / Upper Roller | Roller width, shaft size, bracket style, mounting position |
| Sprocket | Drive Sprocket | Tooth number, pitch, bolt hole layout, outside diameter |
| Track Shoes | Crawler Shoes / Track Pads | Shoe width, pitch, bolt holes, quantity, chain compatibility |
How to Check Wear Before Ordering
Before ordering a replacement idler or related parts, inspect the crawler chain and rollers together. A worn chain may damage a new idler quickly, while a damaged idler can accelerate wear on track links and rollers.
| Inspection Item | What to Check | Possible Problem | Recommended Action |
|---|---|---|---|
| Track Link Pitch | Measure pitch elongation across several links | Chain stretch or internal pin and bushing wear | Compare with service manual; replace chain if beyond limit |
| Track Link Height | Check rail height and uneven wear | Reduced contact surface and unstable travel | Inspect rollers and idler contact areas together |
| Roller Tread Diameter | Measure roller outside diameter and tread profile | Excessive wear, flat spots, or uneven contact | Replace worn rollers and check chain alignment |
| Roller Flange | Inspect flange thickness and side wear | Misalignment, side loading, or track chain movement | Check idler, sprocket, frame alignment, and chain condition |
| Oil Leakage / Noise | Look for seal damage, oil loss, or abnormal rotation noise | Bearing wear or seal failure | Replace damaged rollers or idler before further chain damage |
Inspection Note: The chart above is a general reference. Final wear limits should be confirmed according to the crawler crane model, undercarriage design, and service manual. If you are not sure, send photos and measurements for checking.
Packing and Shipment
The DH508 idler can be packed according to weight, size, quantity, and transport method. For export orders, protective packing helps reduce surface damage during loading and long-distance delivery. If the order includes several undercarriage parts, combined packing can be discussed before shipment.
FAQ
you give me a chart on how to check crawler crane track link and roller wear limits?
Yes. You can use the wear inspection chart in this page as a basic reference. It covers track link pitch, link height, roller tread diameter, flange wear, leakage, noise, and uneven contact marks. Final wear limits should always be checked against the crane service manual or confirmed with the part supplier.
Can you recommend reliable aftermarket crawler crane parts suppliers with international shipping?
Yes. When selecting a supplier, check whether they can verify parts by photos, drawings, samples, and dimensions, provide export packing, arrange international shipping, and communicate clearly about fitment. SQ supports overseas buyers with crawler crane undercarriage parts inquiries and shipment arrangement.
Can SQ supply parts for other crane brands?
Yes. SQ can help check crawler crane parts for different brands and models. For example, Keobelco,XCMG,Hitachi ,Sany crane track shoes can be confirmed by machine model, shoe width, pitch, bolt hole layout, and photos.
Need Help Checking a DH508 Crane Idler?
Send us your old idler photos, dimensions, drawing, sample information, required quantity, and destination country. SQ can help review the correct Nippon Sharyo DH508 idler and related crawler crane undercarriage parts for your repair or stock order.
