The part is a precision-engineered O-ring seal designed specifically for the hydraulic steering vane pump on the HOWO MAX 4X2 tractor. This 712W47101-2016-5 seal provides a critical barrier against fluid leakage at the pump outlet, ensuring consistent hydraulic pressure and reliable steering performance.
When you choose authentic Howo Parts, this 712W47101-2016-5 guarantees OE fitment and superior sealing characteristics. Below is the detailed description of the key component included with this 712W47101-2016-5 assembly.
The O-ring seal is a precision-moulded elastomer component that creates a leak-proof seal between the steering vane pump and the high-pressure hydraulic line. This 712W47101-2016-5 O-ring is manufactured from high-grade FPM (fluorocarbon rubber), offering outstanding resistance to power steering fluids, high temperatures (up to 150°C),
and chemical degradation. The part is dimensionally matched to the pump outlet port groove, ensuring perfect compression when the fitting is torqued. This 712W47101-2016-5 seal prevents fluid loss, maintains system pressure, and protects the pump from cavitation. Proper installation of The part is essential for the reliable operation of the power steering system. The part should be lubricated with clean fluid before fitting to ensure it seats correctly and does not pinch.
712W47101-2016-5 – genuine HOWO hydraulic pump O-ring seal for MAX 4X2
The part is crafted from high-grade FPM rubber, providing excellent resistance to hydraulic fluids, high temperatures, and ageing. This 712W47101-2016-5 seal maintains its elasticity and sealing force over years of service, ensuring long-term reliability.
This 712W47101-2016-5 is manufactured to the exact original specifications. The precise cross-section and inner diameter of The part guarantee a perfect fit into the pump groove, providing an optimal seal without over-compression.
Rated for continuous service up to 150°C, The part withstands the extreme under-hood temperatures of the MC13 engine without hardening or losing its sealing ability. This 712W47101-2016-5 is built for heavy-duty applications.
When replacing or servicing the steering vane pump, The part O-ring must be replaced to guarantee a leak-free connection. This 712W47101-2016-5 kit provides the exact seal needed to restore the pump’s sealing integrity.
The part O-ring is installed in the outlet port of the steering vane pump, where it creates a static seal between the pump body and the high-pressure hydraulic line fitting. When the fitting is tightened, The part is compressed within its groove, deforming slightly to fill any microscopic imperfections in the mating surfaces. This deformation creates a positive barrier that prevents pressurised hydraulic fluid from escaping,
even at pressures up to 160 bar. The part also prevents air from being drawn into the system, which could cause pump cavitation and noisy operation. A correctly installed 712W47101-2016-5 ensures that the steering pump can deliver full flow and pressure to the steering gear, providing consistent and effortless steering assistance. Over time, exposure to heat,
pressure, and fluid chemistry can cause The part to harden and lose its sealing effectiveness. Replacing The part during pump service is a small but critical step that prevents leaks and extends the life of the entire steering system.
To install The part, first ensure that the pump outlet port and the fitting are clean and free from debris or old seal material. Apply a thin film of clean power steering fluid to The part to lubricate it, which helps prevent the seal from rolling or pinching during assembly. Carefully place The part into the groove on the pump outlet,
ensuring it is fully seated and not twisted. Then, thread the hydraulic line fitting into the pump port by hand until it contacts The part. Use a wrench to tighten the fitting to the specified torque (typically 30-35 Nm).
Do not over-tighten, as this can distort The part and compromise the seal. After installation, start the engine and turn the steering wheel from lock to lock several times to purge air from the system, then check for any leaks around The part. If a leak is detected, verify that The part is correctly seated and that the fitting is torqued to specification.
If hydraulic fluid is seen dripping from the pump outlet connection, The part may be damaged, worn, or incorrectly installed. Inspect The part for cuts, nicks, or signs of hardening. If The part appears flattened or has taken a compression set,
it will no longer provide an effective seal and must be replaced. A leaking 712W47101-2016-5 can also be caused by over-torquing the fitting, which can extrude the seal from its groove.
If a leak persists after replacing The part, check the fitting and pump port for damage such as scratches or burrs that could compromise the sealing surface. Always use a new 712W47101-2016-5 when servicing the pump; reusing an old seal is not recommended as it may have lost its elasticity. If the steering system exhibits a whining noise, it could be due to air ingress caused by a faulty 712W47101-2016-5 – replace the seal and bleed the system.
The part does not have a fixed replacement interval, but it should be replaced every time the steering pump is removed or the hydraulic line is disconnected. The part is a relatively inexpensive component, and replacing it proactively prevents fluid leaks that could lead to pump damage or steering failure.
During routine power steering fluid changes (every 100,000 km), inspect The part for signs of wear or degradation. If the fluid appears dark or contaminated, The part may have been exposed to excessive heat or chemicals and should be replaced. Always keep a spare 712W47101-2016-5 in the workshop stock to avoid delays during pump service.
This 712W47101-2016-5 seal is specifically designed for the steering vane pump used on HOWO MAX 4X2 tractors with MC11 and MC13 engines.
It is a direct replacement for the original seal and is compatible with all production years from 2018 onward. The part is also suitable for SITRAK C7H and HOWO T7H models that use the same pump outlet configuration. This 712W47101-2016-5 is not compatible with pumps that have a different outlet port design or thread size. Always verify that the pump model matches The part specifications before ordering.
Aftermarket O-rings may be made from inferior materials such as NBR (nitrile) which can swell, harden, or crack when exposed to power steering fluid and high temperatures. Generic seals may not have the correct dimensions, leading to either insufficient compression (leaks) or excessive compression (seal extrusion). Using a non-genuine 712W47101-2016-5 can result in sudden fluid loss,
loss of steering assistance, and potential pump damage from running dry. The genuine 712W47101-2016-5 is manufactured to SINOTRUK’s exact specifications, using certified FPM material and precision-moulded dimensions. The small additional cost of a genuine 712W47101-2016-5 is insignificant compared to the cost of replacing a pump or the safety risk of steering failure. For fleet operators, using genuine 712W47101-2016-5 seals ensures consistent sealing performance and minimises unscheduled downtime.
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