A technical analysis of the 6TG-E130x1947 6-Stage 1947mm Stroke Telescopic Underbody Cylinder for 18-Ton Dump Trucks, examining its 6-stage nested architecture, 1,947 mm extended stroke, ultra-compact 543 mm closed height, 180 bar rated pressure, 11-to-18 metric ton tipping capacity, and trunnion cradle mounting geometry for commercial tippers.
Total Usable Power Stroke:
1947mmCollapsed Closed Installation Length (L):
543mmOuter Base Barrel Diameter (C):
132mmFinal Stage Piston Diameter (E):
45 mm solid hard-chrome alloy steel stageTotal Cylinder Net Weight (Mass):
53 kg (116.8 lbs Lightweight High-Yield Steel)When commercial dump trucks haul wet clay, asphalt, or dense soil, material adhesion inside the dump box prevents clean discharge at standard 45-degree tipping angles. If sticky cargo hangs up in the front corners, operators are forced to violently jerk the truck bed, introducing severe torsional twisting forces into the chassis frame.
To guarantee complete gravitational discharge, body builders require steep tipping angles of 55 to 60 degrees.
However, achieving nearly 2 meters of linear stroke on short-wheelbase 18-ton commercial tippers presents a packaging dilemma: a conventional single-stage or 3-stage cylinder requires a long mounting height that forces the truck bed into an unsafely high center of gravity.
The 6TG-E130x1947 6-Stage 1947mm Stroke Telescopic Underbody Cylinder for 18-Ton Dump Trucks solves this mechanical conflict by packing 1,947 mm of total stroke into an ultra-short 543 mm collapsed installation envelope. Expanding across 6 nested hard-chrome alloy steel sleeves, it elevates the dump body to full steep-angle discharge while keeping chassis mounting height completely flush with the subframe.
| Technical Specification | Details |
|---|---|
| Model Designation | 6TG-E130x1947 |
| Total Telescopic Extension Stages | 6 Expansion Stages |
| Total Usable Power Stroke | 1,947 mm (76.65 Inches Ultra-Long Extension) |
| Collapsed Closed Installation Length (L) | 543 mm (21.38 Inches Ultra-Compact Envelope) |
| Outer Base Barrel Diameter (C) | 132 mm (130 mm nominal stage series) |
| Final Stage Piston Diameter (E) | 45 mm solid hard-chrome alloy steel stage |
| Total Cylinder Net Weight (Mass) | 53 kg (116.8 lbs Lightweight High-Yield Steel) |
| Total Operating Oil Volume | 14.0 Liters |
| Maximum Rated Working Pressure | 180 bar (18.0 MPa / 2,610 psi) |
| Gross Tipping Capacity Range | 11 to 18 Metric Tons (24,200 to 39,600 lbs) |
| Intermediate Stage Diameters (mm) | 130 · 105 · 90 · 75 · 60 · 45 mm |
| Standard Porting Thread Options | G 1/2, G 3/8, M22x1.5, M18x1.5, NPT 1/2 |
| Primary Chassis Mounting Form | Central Trunnion Mounting in Articulated Cradle |
At nearly 2 meters of extension, side-wind loads and uneven ground settlement create lateral bending moments. The 6TG-E130x1947 6-Stage 1947mm Stroke Telescopic Underbody Cylinder for 18-Ton Dump Trucks utilizes precision-machined internal bronze guide rings with extended internal overlap between each of its 6 stages. When the final 45 mm stage fully extends, substantial overlap length remains locked inside the 60 mm sleeve, creating a rigid telescoping structural column that resists side-sway and lateral jamming during off-camber dumping.
In poorly engineered telescopic hoists, as oil transfers from a larger diameter sleeve (130 mm) to a smaller sleeve (105 mm, 90 mm, down to 45 mm), effective piston area drops, causing an abrupt hydraulic pressure spike and bed shudder. The 6TG-E130x1947 6-Stage 1947mm Stroke Telescopic Underbody Cylinder for 18-Ton Dump Trucks features tapered internal fluid transition ports and calibrated damping seals. These precision orifices smooth out fluid acceleration during stage handoffs, ensuring seamless, continuous extension without dangerous pressure surges.
| Assembly Sequence | Components |
|---|---|
| Bottom Mount | Chassis Subframe → Central Trunnion Cradle → 130mm Base Outer Barrel |
| Telescopic Stages | 105mm Stage → 90mm Stage → 75mm Stage → 60mm Stage → 45mm Stage |
| Top Connection | 45mm Stage → Spherical Upper Rod Eye → Dump Body Understructure |
Every sleeve on the 6TG-E130x1947 6-Stage 1947mm Stroke Telescopic Underbody Cylinder for 18-Ton Dump Trucks is cold-drawn from premium St52-3 / Q355D micro-alloyed seamless steel:
Micro-Cracked Hard Chrome Electroplating: Each moving stage receives a minimum 25 μm dense hard chrome layer, providing exceptional surface hardness (> 900 HV) that resists abrasive gravel dust and road deicing chemicals.
Low-Friction Polyurethane & NBR Lip Seals: Heavy-duty double-lip U-cup seals with active wave spring pre-loaders prevent external oil weepage across temperatures from -40°C to +100°C.
Ultra-Sonic Degreased Assembly: Assembled in HCIC's pressurized cleanrooms, ensuring zero microscopic metal shavings score internal tube finishes during factory commissioning.
To ensure trouble-free installation on commercial tipper chassis:
1. Hydraulic Reservoir Volume: The cylinder requires 14.0 liters of usable fluid displacement. Ensure the truck's hydraulic tank maintains at least 25 to 30 liters of total volume to prevent oil starvation and pump cavitation during full 1,947 mm extension.
2. Trunnion Pin Greasing: Lubricate the dual trunnion mounting pins with extreme-pressure lithium grease before initial commissioning and every 250 operating hours thereafter.
3. Flow Rate & Tipping Time: Supplying 35 to 45 L/min from a transmission-mounted PTO gear pump achieves full 1,947 mm extension in approximately 20 to 25 seconds.
