Basic Info

• OE Part No.: 0501 328 038

• Cross Reference OE: Volvo 21910720, Iveco 42578117, Renault 7421910720, Eurotec 95008622

• Matching counterpart piston model: 0501 324 670 (not interchangeable)

• Product Type: Auxiliary Box Splitter Integrated Sealing Cylinder Piston / Half-Speed Shift Piston

• Brand: ZF OEM Matching Transmission Pneumatic Repair Spare Parts

• Compatible Gearbox: ZF 16S151NMV, 16S1930, 16S2230, 16S2530, 16S2531 Ecosplit4 16-speed heavy truck manual transmission

• Applicable Vehicles: Sinotruk Sitrak/Howo, FAW J7, MAN TGS/TGX, DAF CF/XF, Iveco Stralis, Volvo FH heavy haul tractors

• Material: High-strength nodular cast iron piston body, one-piece vulcanized HNBR high-temperature resistant outer sealing ring

• Net Weight: approx 0.335kg (reference value)

• Standard Working Air Pressure: 5–8 bar

• Matching Components: Auxiliary box splitter cylinder housing, two-position five-way control valve, range shift fork, air pipeline assembly

• Function: Bear bidirectional compressed air thrust, produce linear reciprocating stroke to drive high-low range shift fork, complete conversion of low/high speed gear ranges

• Category: Heavy Truck ZF 16S Series 16-Speed Transmission Auxiliary Box Pneumatic Control System Repair Spare Parts

Material & Advantages

1. High-density nodular cast iron piston body with smooth super-finished outer base surface, wear-resistant and anti-scuffing under long-term reciprocating sliding inside cylinder bore

2. Integral vulcanized HNBR composite sealing ring, good oil resistance, water resistance and high temperature resistance, effectively prevent internal and external air leakage of cylinder

3. Strict OEM outer diameter, thickness and central mounting hole dimension, direct press-fit installation during overhaul without reaming or polishing modification

4. Optimized disc-shaped force-bearing structure to avoid piston deformation under long-term high air pressure impact

5. Integrated sealing design eliminates the trouble of separate matching and installation of independent O-rings, reduces assembly air leakage risk

6. Adapt to long-distance full-load highway logistics, mountain heavy climbing and high-frequency half-speed range switching heavy transport working conditions

Application Scenarios

• Replace worn, air-leaking, slow-response original splitter cylinder piston marked 0501 328 038 for ZF 16-speed Ecosplit4 gearbox

• Fix transmission faults including unable to switch high/low speed ranges, delayed half-speed shift, excessive air consumption of air compressor, gear engagement lag

• Complete auxiliary box pneumatic cylinder disassembly overhaul and regular maintenance for fleets equipped with ZF 16-speed manual gearbox

• Assemble matched cylinder housing and two-position five-way valve following official ZF pneumatic circuit assembly standards

Supply & After-sale

• MOQ: 1 piece

• Warranty: 3–6 months (exclude contaminated compressed air, improper press installation, collision damage and natural aging of sealing ring)

• Packaging: Independent shockproof foam + thick carton sealed packaging to protect outer sealing ring and piston surface from scratch & extrusion deformation

• Remarks: Distinguish from model 0501 324 670; confirm gearbox model ZF 16S Ecosplit4 series before ordering to avoid mismatching

Gearboxes assembly include brand ZF, Eaton, FAST, Allison, DONGFENG, DC, Benz, volvo, HOWO, WLY etc. Gearboxes parts includegear, synchronizer, PTO, housing, bearings, shaft, top cover, sensors, wireness, repair kits... etc.

Our products have been exported to more than 50 countries and regions such as Korea, Chile, Russia, Kazakhstan, USA, Ecuador, Turkey, Iran, Africa, Latin America, etc., and have been unanimously recognized by customers.

In the future, we will be committed to creating higher-end quality and more intimate service. And a more comfortable customer experience to build Yongliwei company into an auto parts supplier with excellent corporate culture, scientific development concept and continuous innovation ability.

Shiyan Yongliwei Industry and Trading Co., Ltd. is a modern enterprise integrating design, development, production and sales of gearbox assembly and gearbox parts.

Our company was founded in Hubei province, China, and has been specialized the truck gearboxes in Chinese offline market for 21 years .Our parts are the leader of gearboxes area in the China now.

Our company was set up in the largest truck parts production base in the world –Shiyan city, Hubei, China, to meet the demand for products in the Asia and South American markets, a professional international trade sales team was born in Hubei in 2021.

Shiyan Yongliwei is focusing on creating high quality, high technology and high standard gearboxes and its parts.

* 8000 square meters of large warehouse.

* A number of maritime, land, air transport international logistics companies work closely together.

* To provide you with convenient, fast and low-cost e-commerce one-stop service.