FAST GEAR 19726 8A FOR XCMG QY50K TRUCK CRANE

Product Details

FAST GEAR 19726 8A transmission for XCMG QY50K crane. 8-speed, 2600 N·m torque, OEM-fit

Product Overview (intro paragraph – bold key terms)

The FAST GEAR 19726 8A is a purpose-built manual transmission assembly designed exclusively for the XCMG QY50K 50-ton truck crane. This gearbox delivers reliable power distribution, smooth shifting, and high fatigue resistance under heavy lifting cycles. It is a direct OEM replacement, ensuring bolt-on fitment without modification. Ideal for construction, mining, and port logistics.

Key Specifications Table (with clear headings and explanatory notes)

Parameter	Value	Description
Model	FAST GEAR 19726 8A	Factory-coded variant for XCMG QY50K; verify against your original gearbox tag.
Application	XCMG QY50K Truck Crane	50-ton lifting capacity; 6×4 chassis configuration.
Transmission Type	Manual, constant-mesh	8 forward speeds + 1 reverse; synchronized gears for reduced shift effort.
Max Input Torque	2600 N·m	Sufficient for 50-ton hoisting and heavy-grade climbing.
Gear Ratios (1st–8th)	12.65 / 8.38 / 6.22 / 4.57 / 3.40 / 2.46 / 1.83 / 1.00	Progressive ratio spread for start-up, acceleration, and high-speed road transport.
Reverse Ratio	13.22	Provides strong low-speed reverse control for precision positioning.
PTO Provision	Rear and side take-off ports	Compatible with hydraulic pump drives for crane outriggers and winch.
Oil Capacity	14.5 L (SAE 80W-90 GL-5)	Use mineral or synthetic gear oil; change every 2000 operating hours.
Weight (dry)	-	Cast-iron housing with integrated ribbing for vibration damping.
Mounting Pattern	SAE #2 bell housing	Direct bolt-up to XCMG’s 6-cylinder diesel engine (WP10 series).
OEM Part Number	19726 8A	Cross-reference with XCMG parts catalog for verification.

Detailed Feature Descriptions (with subheadings – H2/H3)

Built for Extreme Duty Cycles
The FAST GEAR 19726 8A uses forged steel gears and tapered roller bearings to withstand shock loads from sudden hook loads and uneven terrain. The housing incorporates internal oil channels that continuously lubricate the upper shaft gears, even on steep inclines.

Perfect Fit for XCMG QY50K
This gearbox matches the original factory specifications for the QY50K’s driveline. The input shaft spline count (10T × 45°) and clutch housing depth are precisely machined to eliminate alignment issues. Installation requires no spacer plates or adapter rings.

Shift Quality & Driver Comfort
A single-rail shift mechanism with self-adjusting cable ends reduces lever free play. The helical-cut constant-mesh gears lower noise levels by 6–8 dB compared to straight-cut designs, improving operator comfort during 8-hour shifts.

Maintenance & Service Intervals

Oil change: Every 2000 hours or 12 months.
Clutch release bearing check: Every 1000 hours.
Magnetic drain plug captures ferrous wear particles – inspect at each oil change.
All external seals are double-lip nitrile rubber, resistant to dust and moisture.

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FAST GEAR 19726 8A – Heavy-Duty Transmission for XCMG QY50K Truck Crane