Shandong Shengyue Technology Development Co.,Ltd is one of the most professional sinotruk howo steering oil reservoir / oil tank cap wg9719470033 manufacturers and suppliers in China. Please feel free to buy high quality genuine auto parts at competitive price from our factory.
SINOTRUK HOWO Steering Oil Reservoir / oil tank Cap WG9719470033
Key operating principle of the "breather valve" on the cap
When a heavy-duty truck is driven and steered, the hydraulic fluid within the power steering system circulates frequently (flowing in and returning).
1. During fluid return: The fluid level in the reservoir rises, and air is expelled outward through the breather hole in the cap.
2. During fluid intake: The fluid level drops, and external air is drawn in through the cap to maintain normal air pressure inside the reservoir.
Reservoir & Cap Components (Storage & Filtration Core)
| No. | English Name (BOM) | Qty | Defect / Overhaul Replacement Criteria |
|---|---|---|---|
| 1 | Power Steering Reservoir Cap | 1 pc | This is WG9719470033-1 itself. Replace if the integrated breather valve is clogged, fluid overflows, or the seal degrades. |
| 2 | Power Steering Reservoir Assembly | 1 pc | This is WG9719470033 assembly. Includes the tank body. Replace entirely if the shell cracks or metal ports deform. |
| 3 | Steering Hydraulic Filter Element | 1 pc | Core consumable housed inside the reservoir. Mandatory replacement during major overhauls or every 50,000–100,000 km. |
| 4 | Reservoir Cap Rubber Seal / O-Ring | 1 pc | Pre-installed with the cap. Replace if it hardens under high engine bay heat, causing fluid seepage. |
Steering Hoses & Fasteners (Fluid Routing)
| No. | English Name (BOM) | Qty | Defect / Overhaul Replacement Criteria |
|---|---|---|---|
| 5 | Steering Pump Suction Hose (Low-Pressure) | 1 pc | Connects the reservoir bottom to the pump inlet. Replace if rubber ages, cracks, or collapses under suction. |
| 6 | Steering Return Hose (Low-Pressure) | 1 pc | Routes fluid back from the steering gear to the reservoir. Replace if weeping oil or degraded. |
| 7 | Worm Drive Hose Clamps | 2-4 pcs | Secures low-pressure suction and return hoses. Replace if rusted or stripped to prevent oil leaks or air ingress. |
| 8 | Mounting Bracket Bolts | 2 pcs | Standard bolts (M8/M10) used to secure the steering reservoir bracket to the truck chassis frame. |
Linked High-Pressure Hydraulics & Consumables (Power & Media)
| No. | English Name (BOM) | Qty | Defect / Overhaul Replacement Criteria |
|---|---|---|---|
| 9 | Power Steering Vane Pump Assembly | 1 unit | System pressure source. Replace if internal vanes are worn, causing stiff steering or severe whining noises. |
| 10 | High-Pressure Steering Hose | 1 pc | Connects pump to steering gear. Replace immediately if oil leaks at crimped joints or if inner steel braid is exposed. |
| 11 | Premium Power Steering Fluid (ATF-III) | 2-3 L | Mandatory for complete fluid flush and refill. Recommended to use SINOTRUK genuine anti-wear steering fluid. |
DETAILS
| DESCRIPTION | Steering Oil Reservoir / oil tank Cap | PART NUMBER | WG9719470033 |
| WEIGHT | 0.5kg | VOLUME | 10 cm × 10 cm × 6 cm |
| 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 | CHASSIS |
| PACKAGE | Carton/Woodenbox | PORT OF LANDING | Qingdao Port,China |
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