Shandong Shengyue Technology Development Co.,Ltd is one of the most professional sinotruk howo a7/t7h cab lifting cylinder / cab tilt cylinder wg9719820004 manufacturers and suppliers in China. Please feel free to buy high quality genuine auto parts at competitive price from our factory.
SINOTRUK HOWO A7/T7H Cab Lifting Cylinder / Cab Tilt Cylinder WG9719820004
Four Typical Failure Modes of Damaged Lift Cylinders
1. External Leakage (Most Common): The piston rod oil seal at the top of the cylinder fails due to aging or scoring by dirt and grit; during high-pressure lifting, hydraulic fluid sprays out or slowly seeps from the base of the piston rod. This leads to low fluid levels in the reservoir, resulting in weak lifting performance or a complete inability to lift the cab.
2. Internal Leakage (Automatic Descent After Lifting): The seal ring on the internal piston wears through. This manifests as the cab slowly sinking under its own weight after being raised via the manual pump. This poses a critical safety hazard-specifically the risk of crushing injuries-during engine overhauls.
3. Piston Rod Scoring/Deformation: Forced lifting operations on uneven mining terrain, or binding caused by a lack of lubrication on the upper and lower cylinder pivot pins, can cause the piston rod to bend or sustain deep surface scratches from metal-on-metal contact, resulting in the cylinder seizing and failing to retract.
4. Hydraulic Lock/Seizure: Some high-end OEM cylinders feature an integrated hydraulic lock/anti-burst valve at the base. If the valve spool becomes jammed by contaminated fluid, the system may allow lifting but prevent lowering, or cause asynchronous movement between the cylinders, potentially twisting or misaligning the cab.
SINOTRUK HOWO Heavy Truck Cab Lifting System Overhaul Complete BOM List
| No. | Component Name | SINOTRUK Genuine / Specification | Recommended Qty |
|---|---|---|---|
| Core Assembly | |||
| 1 | Cab Lifting Cylinder Assembly | WG9719820004 (Applicable for HOWO 7 / A7 / T7H heavy-duty dump trucks and tractors) |
1-2 Pcs |
| High-Pressure Hydraulic Lines & Valves | |||
| 2 | Cylinder High-Pressure Inlet/Return Hydraulic Hoses | WG9719820011 / WG9719820012 (Steel-wire braided high-pressure hoses, selected based on specific model) |
1 Set (2 Pcs) |
| 3 | Banjo Bolt & Bonded Washers Kit | Metric Thread: M12 or M14 (with matching bonded washers) | 1 Set |
| Mechanical Fasteners & Pins | |||
| 4 | Cylinder Upper/Lower Fixing Pins | SINOTRUK chassis exclusive hardened pins | 2 Pcs |
| 5 | Heavy-Duty Cotter Pins / Snap Rings | National standard heavy-load hardware matching pin sizes | 2-4 Pcs |
| Hydraulic Pump & System Fluids | |||
| 6 | Cab Tilt Pump (Manual/Electric) Seal Kit | Matches genuine WG9719820001 Manual Pump or electric pump variant | 1 Set |
DETAILS
| DESCRIPTION | Cab Lifting Cylinder / Cab Tilt Cylinder | PART NUMBER | WG9719820004 |
| WEIGHT | 8kg | VOLUME | 800 mm × 150 mm × 150 mm |
| TRUCK MOLDE | SINOTRUK | QUALITY | Copy,High Copy, OEM,Original |
| MOQ | 1 | WARRANTY | 1 year |
| PAYMENT | TT/WESTEN UNION | SHIPMENT | by air/sea/railway |
| BRAND | SINOSACHS | PLACE OF ORIGIN | JINAN CITY,CHINA |
| STOCK | IN STOCK | APPLICABLE SITE | ENGINE |
| PACKAGE | Carton/Woodenbox | PORT OF LANDING | Qingdao Port,China |
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