S-902 Oil Transfer Pump
The STAR S-902 Oil Transfer Pump combines an aluminium die cast head with a steel barrel to deliver the durability of steel construction with a lighter, corrosion-resistant head assembly. This dual-direction fluid transfer gun draws in and pumps out liquid in a single plunger stroke.
The precision-machined aluminium die cast head reduces overall pump weight compared to the all-steel S-901 while maintaining the same 500 ml (16 oz.) barrel capacity. The die cast process produces a dense, void-free head structure that seals consistently across thousands of pump cycles.
With 8 feet of vinyl hose split across inlet and outlet valves, the S-902 reaches between containers, into engine bays and down into storage drums. Compatible with fuel oils, mineral oils, synthetic oils, cooling liquids and spirits through its NBR seal and steel barrel construction.
We at STAR manufacture this transfer gun for automotive workshops, fleet depots, industrial maintenance teams and distributors who want the full 500 ml capacity of a steel-barrel pump with a lighter head for easier handling. 40+ years of manufacturing experience, serving customers across multiple continents with OEM and private label options available.
Rugged Build Quality
- Aluminium die cast head: precision-machined with void-free dense structure, providing corrosion resistance and lighter weight than plated steel heads.
- Steel barrel: full 500 ml capacity cold-drawn steel barrel withstands workshop drops and tool box storage without deformation.
- Delta type plunger handle: drop-resistant triangular grip provides secure two-finger operation even with oily hands.
- NBR (nitrile rubber) seals: chemical-resistant seals compatible with petroleum-based fluids, synthetic oils, coolants and spirits.
- 8 ft vinyl hose (2 x 4 ft): flexible PVC hose on both inlet and outlet valves for reach into deep sumps and between containers.
- Dual-direction operation: single plunger stroke draws in or pumps out fluid, eliminating separate extraction and dispensing tools.
- 500 ml (16 oz.) capacity: standard barrel size transfers meaningful fluid volume per cycle for efficient oil changes and fluid service.
- Hybrid construction: aluminium head for weight reduction and corrosion resistance where moisture contact is highest; steel barrel for impact durability where drops are most likely.
How the S-902 Works
The S-902 uses the same proven dual-direction plunger mechanism as the STAR transfer pump range:
- Connect: Attach the inlet hose to the source container (engine sump, gearbox, drum) and the outlet hose to the destination. Each hose provides 4 ft (1.2 m) of reach, totalling 8 ft between source and destination.
- Extract: Pull the Delta handle upward. The plunger creates vacuum inside the steel barrel, drawing fluid through the aluminium die cast head and inlet valve. One full stroke fills the 500 ml chamber.
- Dispense: Push the handle downward. Positive pressure forces fluid out through the outlet valve and hose. Non-return valves on each port ensure one-way flow per stroke direction.
No priming required. The aluminium die cast head's precision-machined valve seats provide immediate suction on the first stroke without the need to bleed air or pre-fill the barrel.
| Parameter | Value |
|---|---|
| Model | S-902 |
| Type | Manual Dual-Direction Oil Transfer Pump |
| Mechanism | Plunger Type (Hand Operated, Dual Direction) |
| Capacity | 500 ml (16 oz.) |
| Barrel Diameter (Ø) | 57.15 mm / 2-1/4" |
| Barrel Material | Steel |
| Head Material | Aluminium Die Cast |
| Handle Type | Delta Type Drop-Resistant Plunger Handle |
| Hose Length | 8 ft total (2 x 4 ft / 2 x 1.2 m) |
| Hose Material | PVC (Vinyl) |
| Wetted Components | Steel, Aluminium, PVC, NBR |
| Seal Material | NBR (Nitrile Rubber) |
| Recommended Fluids | Fuel Oils, Mineral Oils, Synthetic & Biological Oils, Cooling Liquids & Spirits |
| Not Recommended For | Gasoline, Acetone, MEK, Strong Solvents, Corrosive Chemicals |
| Operating Temperature | -10°C to +60°C |
| Country of Origin | India (Made in Ludhiana) |
| Certifications | ISO 9001:2015, CE, RoHS compliant |
| HS Code | 8413 |
| Warranty | 1 year against manufacturing defects |
| OEM / Private Label | Available (MOQ applies) |
Every S-902 ships complete with hoses attached and ready to use. No assembly required.
4 ft (1.2 m) Inlet Vinyl Hose
4 ft (1.2 m) Outlet Vinyl Hose
Instruction Manual
Every kit is fully customisable. Alternative hose lengths, materials, or fittings can be specified for OEM orders.
Contact us for custom kit configurations.
The S-902's hybrid construction combines the strengths of two materials in a single fluid extractor pump:
The S-902 suits any environment where 500 ml capacity and corrosion-resistant head construction are both priorities:
S-902 Related Models
Oil Transfer Pump S-901 Full Steel Body
500 ml (16 oz.)
Full Steel Body (Max Impact Resistance)
Oil Transfer Pump S-902AL Aluminium Barrel
350 ml (12 oz.)
All Aluminium (Lightest Weight)
Oil Transfer Pump S-902CL Clear Tube
500 ml (16 oz.)
Clear Tube (Visible Fluid Level)
Related Product Categories
Buying Guide: When to Choose the S-902
The S-902 sits between the all-steel S-901 and the all-aluminium S-902AL, combining steel barrel durability with an aluminium head for corrosion resistance and lighter handling:
S-902 vs S-901 (Full Steel Body)
Both offer 500 ml capacity and identical steel barrels. The difference is the head: the S-901 uses a plated steel head for maximum drop resistance, while the S-902 uses an aluminium die cast head that is lighter and naturally corrosion-resistant. Choose the S-901 for the roughest environments where the pump gets dropped onto concrete. Choose the S-902 when you want the same capacity with a lighter head and better moisture resistance.
S-902 vs S-902AL (All Aluminium)
The S-902AL goes fully aluminium (barrel and head) at 350 ml capacity. Choose the S-902AL when minimum weight and wider fluid compatibility (brake fluid, petrol) are priorities. Choose the S-902 when you need the full 500 ml capacity and the impact resistance of a steel barrel, but still want a corrosion-resistant head.
S-902 vs S-902CL (Clear Tube)
The S-902CL replaces the steel barrel with a transparent polycarbonate tube, letting you see fluid colour and level during transfer. Choose the S-902CL for contamination monitoring and volume measurement. Choose the S-902 when barrel durability matters more than visibility.
OEM and Bulk Buyers
For distributors, importers and OEM partners, the S-902 offers a professional-grade hybrid platform with custom branding, packaging and hose options. We at STAR provide private label manufacturing with flexible MOQs and FOB pricing. Contact our export team for partnership details.
Frequently Asked Questions: Oil Transfer Pump Aluminium Die Cast Head
Why does the S-902 use an aluminium die cast head instead of steel?
The aluminium die cast head provides two advantages over plated steel: natural corrosion resistance and reduced weight at the pump's handling point. Aluminium forms a self-healing oxide layer that protects against moisture, condensation and fluid contact without relying on plating that can chip or wear over time. The die casting process produces a dense, void-free structure with precise internal geometry for consistent valve seating. The weight reduction at the head improves handling balance during overhead and awkward-angle transfers.
What capacity does the S-902 hold per stroke?
The S-902 holds 500 ml (16 oz.) per full plunger stroke, identical to the all-steel S-901. This 500ml capacity is the standard professional size for automotive and industrial fluid transfer. For a typical 4-litre engine oil change, expect 8-10 full pump cycles. The 500 ml barrel provides efficient throughput for workshops servicing multiple vehicles daily, reducing the number of pump-and-empty cycles compared to smaller 350 ml pumps.
Is the aluminium die cast head more corrosion-resistant than plated steel?
Yes, aluminium's natural oxide layer provides inherent corrosion protection that does not degrade, chip or wear off like plating on steel heads. Plated steel heads rely on a thin chrome or zinc layer; once that layer is scratched or worn through, the underlying steel corrodes rapidly in moist environments. The S-902's aluminium head maintains its corrosion resistance permanently, making it a stronger choice for workshops with high humidity, coastal locations, or frequent coolant contact.
What fluids are compatible with the S-902?
The S-902 handles fuel oils, mineral oils, synthetic oils, biological oils, cooling liquids and spirits safely. The NBR (nitrile rubber) seals are compatible with all petroleum-based fluids and glycol-based coolants. The steel barrel and aluminium head both resist these fluids without degradation. Do not use with gasoline, acetone, MEK, strong solvents or corrosive chemicals that attack NBR seals and PVC hoses.
How does the S-902 compare to similar 500ml aluminium-head transfer guns?
The S-902 matches the standard professional specification: 500 ml capacity, steel barrel, aluminium die cast head, 8 ft vinyl hose, dual-direction plunger operation. It uses a Delta-type drop-resistant plunger handle and NBR seals, which is the same configuration found across professional-grade transfer guns globally. The S-902 is manufactured by STAR with full OEM customisation available (custom branding, hose lengths, packaging), making it suitable for distributors who need private-label supply at competitive FOB pricing with flexible minimum order quantities.
Can I use the S-902 for transmission and differential fluid service?
Yes, the S-902 handles automatic transmission fluid (ATF), manual transmission gear oil and differential fluid without modification. For thick gear oils (SAE 75W-90, 80W-140), warm the vehicle first to reduce viscosity. The 500 ml capacity means fewer pump cycles per service compared to 350 ml pumps. The 4 ft inlet hose reaches into most transmission fill ports and differential drain points. ATF flows easily at any temperature due to its lower viscosity.
Does the aluminium head affect the pump's pressure or suction power?
No, the aluminium die cast head delivers identical suction and pressure performance to the plated steel head on the S-901. The CNC-machined valve seats and plunger bore in the aluminium head maintain the same tight tolerances as steel. Suction power depends on seal condition and barrel diameter (both identical across the S-901 and S-902), not head material. The aluminium head's precision machining actually provides more consistent valve seating over time because aluminium does not develop surface rust that can pit valve seats.
How long does an aluminium die cast head last in daily workshop use?
An aluminium die cast head lasts the full service life of the pump under normal workshop conditions. The dense die cast structure resists fatigue cracking from repeated pressure cycling. Unlike plated steel that can corrode once the plating wears, aluminium maintains its structural integrity indefinitely in oil and coolant environments. The head will outlast the NBR seals, which are the first wear component requiring replacement (typically every 12-24 months under daily use).
Can I use the S-902 for coolant system service?
Yes, the S-902 transfers ethylene glycol and propylene glycol coolants safely. The aluminium head is particularly well-suited to coolant contact because aluminium resists glycol-based fluids without corrosion. Use the pump to extract old coolant from radiators and overflow tanks, then dispense fresh coolant. Flush with clean water between coolant and oil transfers to prevent cross-contamination. The 8 ft hose reach makes radiator-to-waste-drum transfers straightforward.
Why does my transfer pump only work in one direction?
A pump that extracts but does not dispense (or vice versa) typically has a stuck or damaged non-return valve on the affected port. Each port has an independent non-return valve that allows flow in one direction only. If debris (dried oil, seal fragments, dirt) lodges under a valve, it cannot seat properly and fluid bypasses it. Disassemble the aluminium head, clean both valve seats with solvent, inspect for scoring or debris, and reassemble. If a valve is permanently damaged, replacement valves are available as service parts.
How do I replace worn seals on the S-902?
Remove the plunger assembly from the barrel by unscrewing the head, then slide the plunger out. The NBR plunger seal sits in a groove on the plunger rod. Peel off the old seal, clean the groove and barrel interior with solvent, and press the new seal into place. Apply a thin film of the fluid you will be transferring to lubricate the new seal before reassembly. Replacement seal kits are available from STAR. Typical seal life is 12-24 months under daily professional use, longer for occasional home garage use.
How should I clean the S-902 when switching between oil and coolant?
Pump kerosene or mineral spirits through the barrel and hoses to dissolve oil residue, then pump clean water through to flush the solvent, then pump air to dry. Oil residue left in the pump will contaminate coolant, potentially causing foaming or reduced heat transfer in the cooling system. For the reverse (coolant to oil), pump clean oil through to displace glycol residue. The aluminium head tolerates all these flushing fluids without degradation.
What is the recommended storage method for the S-902?
Store with the barrel empty, hoses coiled loosely, in a clean dry area between 5°C and 35°C. The aluminium head does not require anti-corrosion treatment during storage. The steel barrel benefits from a light oil film on the interior if storing for more than 3 months. Keep vinyl hoses away from direct sunlight to prevent UV degradation. Do not store with fluid in the barrel as residual oil can polymerise and bond the plunger seal to the barrel wall over extended periods.
What PPE should I wear when using an oil transfer pump?
Wear nitrile gloves and safety glasses as minimum protection when transferring any automotive or industrial fluid. Used engine oil contains carcinogenic compounds; avoid prolonged skin contact. Coolant (ethylene glycol) is toxic if ingested and irritates eyes. Gear oil and ATF can cause skin irritation with repeated exposure. Work in ventilated areas when transferring fluids that produce vapours. Dispose of waste fluids at approved collection points according to local environmental regulations.
Why Global Buyers Trust STAR
We at STAR have been manufacturing oil transfer pumps and fluid handling equipment in our ISO 9001:2015 certified Ludhiana facility since 1980. As a dedicated manufacturer and wholesale supplier, our products are shipped internationally across Europe, Asia, Africa and the Americas with full export documentation and dedicated OEM support.