RTD11509C Gearbox Assembly for XCMG QY50K and QY70K Cranes

The RTD11509C gearbox assembly is listed for selected XCMG QY50K and QY70K truck crane chassis. A complete transmission must match the chassis installation, engine and clutch interface, output connection, shift controls and power take-off arrangement.

Identification Checklist

• RTD11509C transmission nameplate and serial number

• XCMG chassis model and complete chassis serial number

• Bell housing and clutch interface

• Input shaft, output flange and mounting supports

• Gear-shift tower, linkage or control configuration

• PTO openings, covers and installed PTO requirements

• Speed sensor, reverse switch and other electrical connections

Application and Service Scenarios

The gearbox assembly may be considered after confirmed internal gear, shaft, synchronizer, bearing or housing damage; severe lubricant contamination; or an overhaul assessment showing that complete replacement is more practical than repair. It is also used during chassis powertrain refurbishment. Hard shifting, noise or loss of drive can also originate in the clutch, linkage, driveline or lubricant condition and should be diagnosed first.

Scope of Supply

Clarify whether the request requires a bare gearbox, complete shift mechanism, bell housing, sensors, PTO covers, brackets or an installed PTO. Similar RTD11509C listings can differ in attached equipment. The quotation should list every included component.

Pre-Installation Checks

Inspect the clutch, flywheel interface, mounts, propeller shaft, cooler or lubrication connections and external controls. Confirm input and output alignment. Use the specified lubricant and commissioning procedure, and verify shifting and leakage before road or crane operation.

Export Preparation

Lubricant is handled according to transport requirements. Shafts, flanges and openings are protected, and the heavy gearbox is bolted to a reinforced skid. Labels show RTD11509C and the included accessory scope.

Frequently Asked Questions

Does RTD11509C alone confirm the complete installation?

The transmission reference is essential, but attached controls, housing, output, PTO and chassis details should also be compared.

What is included with a gearbox assembly?

Scope varies; the quotation should explicitly list sensors, shift controls, housings, brackets and PTO-related items.

Can shifting problems be caused outside the gearbox?

Yes. Clutch, linkage, mounting, driveline and lubricant problems can produce similar symptoms.