PR70 Power Take-Off Unit for XCMG QY25K Crane
The PR70 power take-off unit is listed for selected XCMG QY25K truck crane transmission applications. A PTO transfers power from the vehicle transmission to the hydraulic pump drive, so transmission interface, gear ratio, output and actuator configuration must match.
Identification Checklist
PR70 reference and complete PTO nameplate
XCMG QY25K chassis serial number
Transmission model and PTO opening position
Mounting pattern, pilot and drive-gear engagement
Output shaft, flange or pump interface
Pneumatic, mechanical or electrical engagement actuator
Rotation direction and any ratio marking
Application and Service Scenarios
The PTO may be considered when testing confirms damaged engagement gears, bearing or housing failure, persistent oil leakage from the PTO body, or inability to transmit drive after the air or electrical command has been verified. It is also used during transmission or hydraulic-drive refurbishment. A crane pump that does not turn can also be caused by the actuator, air supply, controls, coupling or pump itself.
Diagnosis Before Replacement
Check the engagement command and actuator travel, air pressure where applicable, wiring and indicator circuits. Inspect transmission lubricant, mounting security and drive coupling. Record noise, leakage and whether the output turns under the specified test condition. Internal transmission damage should be ruled out before fitting a new PTO.
Installation Considerations
Confirm gasket or sealing method, gear engagement and backlash using the applicable service information. Do not use a different ratio or gear simply because the housing fits. After installation, verify clean engagement and disengagement, oil level, leakage and correct pump rotation before operating crane functions.
Export Packing
Openings and shafts are capped, machined faces receive corrosion protection and the assembly is secured in a reinforced case. The package label shows PR70 and the confirmed transmission application.
Frequently Asked Questions
Is every PR70 PTO identical?
The reference is important, but transmission interface, gear, ratio, output and actuator should still be compared.
Why will a PTO fail to engage?
Possible causes include the actuator, air or electrical command, internal gear damage, incorrect adjustment or transmission conditions.
Can a different PTO ratio be used?
Only when the hydraulic pump speed and complete drivetrain application are technically approved.
