Shandong Shengyue Technology Development Co.,Ltd is one of the most professional sinotruk howo shacman fast gear 9-speed manual transmission rtd-11509f manufacturers and suppliers in China. Please feel free to buy high quality genuine auto parts at competitive price from our factory.
SINOTRUK HOWO SHACMAN FAST Gear 9-Speed Manual Transmission RTD-11509F
Basic Physical Specifications & Powertrain Matching
| Parameter Item | Technical Specifications / Data | Remarks & Explanations |
|---|---|---|
| Rated Input Torque | 1100 N·m | Matched with medium-to-heavy duty logistics trucks or engineering tipper/dump trucks. |
| Design Maximum Redundancy | Approx. 1260 N·m (15% redundancy) | Allows the transmission to withstand short-duration sudden heavy-duty torque shocks. |
| Maximum Input Speed | 2600 RPM | Matches the common RPM range of dominant domestic heavy diesel engines (e.g., Weichai WP10/WP12, Cummins). |
| Net Assembly Weight | Approx. 250 kg (excluding clutch housing and gear oil) | The main housing structure is made of high-strength grey cast iron, providing exceptional rigidity. |
| Matched Clutch Specification | Φ430 mm Pull-type / Push-type Clutch | Standard input shaft spline profiles are usually 1.75-inch 10-teeth or 2-inch 10-teeth. |
Drivetrain System & Gear Ratio Topology (Overdrive / Fast Box)
| Gear Description | Precise Gear Ratio | Gear Control Characteristics |
|---|---|---|
| Low Crawler Gear (1st) | 10.05 – 10.17 | Dedicated for heavy-load, steep uphill launching, providing massive torque multiplication. |
| Direct Drive Gear (8th) | 1.000 | The output shaft locks rigidly with the input shaft, achieving peak drivetrain efficiency (approx. 98%). |
| Highest Overdrive Gear (9th) | 0.78 – 0.79 | Dedicated for highway logistics and flat-road cruising; drastically reduces engine RPM to save fuel. |
| Reverse Gear (Reverse) | 10.51 – 10.63 | Delivers even higher reverse torque than the 1st crawler gear for crawling out of rugged terrain. |
| Transmission Layout Type | Main Section + Auxiliary Section Combo | The main section handles basic gear changes; the rear auxiliary section doubles the gear count (High/Low ranges). |
Core Structure & Manufacturing Craftsmanship
| Engineering Item | Core Structural Characteristics | Overhaul & Anti-Error Sourcing Tips |
|---|---|---|
| Twin Countershaft Technology | Twin Countershafts (FAST Core Patent) | Power split layout. Reduces axial length and cuts single gear load distribution by 50%. |
| Increased Center Distance | RTD Series Exclusive Heavy Frame | Features wider shaft spacing. Auxiliary gears and synchronizers are NOT cross-compatible with regular RT series. |
| Main Box Shifting Process | Traditional sliding sleeve shifting (Non-synchronized) | Requires skilled drivers to throttle-match gears manually (or utilize double-clutching methods). |
| Auxiliary Box Shifting Process | Full Friction Synchronizer Mechanical Locking | Pneumatically driven range shifting with integrated interlock protections, completely preventing auxiliary gear grinding. |
Pneumatic Control & Shifting Performance
| System Item | Control Parameters / Indicators | Troubleshooting Guide |
|---|---|---|
| Pneumatic Operating Pressure | 0.70 MPa – 0.85 MPa (7 – 8.5 BAR) | Sourced from the vehicle's secondary air reservoir and filtered via the transmission's built-in regulator. |
| High/Low Range Shifting Control | Dual-line pneumatic slave valve + shifting cylinder | If moisture enters lines (due to air drier failure), the shifting cylinder can easily freeze up and lock in winter. |
| Shifting Control Configurations | Single-lever remote control or dual-cable control | Adaptable to various cab layouts, including flat cab-over trucks (e.g., Shacman) or conventional long-nose trucks. |
| Power Take-Off (PTO) Windows | Bottom and side openings conform to standard SAE windows | Enables easy installation of hydraulic pumps for dump truck tippers or special body modifications. |
Lubrication, Assembly & Preventative Maintenance Indicators
| Maintenance Item | Official Standard Regulations | Strict Compliance Thresholds |
|---|---|---|
| Standard Gear Oil Capacity | 11.5 Liters – 12.5 Liters | Measured until oil just begins to slightly seep out from the level-check plug hole on the side of the housing. |
| Recommended Gear Oil Grade | 85W-90 GL-5 Grade Heavy Duty Gear Oil | Mixing with inferior low-grade engine oil is strictly prohibited; doing so will cause premature bearing seizure on the twin shafts. |
| Overhaul Timing Standards | Strictly align single/double-dot marks on main/countershafts | The Most Critical Rule: Misaligning even a single tooth shifts loads unevenly, which can chew up or shatter the entire box within minutes. |
| Periodic Replacement Interval | Every 50,000 – 80,000 km | New transmission break-in (or initial overhaul fluid flush) must be executed forcefully between 2,000 – 5,000 km. |
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