S-714DP Lever Action Grease Gun
The STAR S-714DP Lever Action Grease Gun – Dual Piston Wide Barrel High Capacity is the 900 cc maximum-capacity member of the STAR dual-piston family, built for the Australian and New Zealand grease market where the 450 g wide-barrel cartridge is the stocked supply format. A wider 63.5 mm (2-1/2") barrel takes the 450 g cartridge directly; the extra-long barrel length extends bulk capacity to 900 cubic centimetres (30 oz.), approximately 38 percent more grease per fill than the 650 cc S-713DP. Sized for mining haul-truck service, large wheel loader and excavator maintenance, and broadacre contractor routes where 50+ fittings per machine are routine.
We at STAR fit the S-714DP with the same dual-piston engineering package as the rest of the DP family: 2.4 g per stroke output (roughly three times a standard single-piston lever gun), full 12,000 PSI (830 bar) pressure rating, dual grease inlet for prime reliability in cold-weather and partial-fill conditions, and variable stroke for partial lever swings where machine structure blocks a full arc. The 900 cc reservoir takes the extra-long barrel format popular on Australian haul-truck service, where a typical 60-fitting machine at 12 g per fitting needs 720 g of grease, comfortably inside one reservoir with margin. Four-way loading (450 g cartridge, bulk pack, suction fill, filler pump) on the CNC-machined aluminium die cast head fits whatever grease supply format your operation uses. For smaller service routes where 650 cc is adequate, the S-713DP on the same wide-barrel platform is the more portable pick.
Rugged Build Quality
- Extra-long wide-barrel for 30 oz. (900 cc) bulk capacity. The barrel is engineered to the 63.5 mm Australian/NZ wide-barrel cartridge format and extended in length to carry 900 cc of bulk grease. Compared with the 650 cc S-713DP, the extra 250 cc eliminates mid-machine reload stops on haul-truck, large-excavator, and combine-harvester service where fitting counts exceed 50 per machine. The extra-long format also improves lever-arm balance because the longer reservoir shifts the gun's centre of mass rearward during the pumping stroke.
- Wide 63.5 mm (2-1/2") barrel sized for 450 g cartridges. The barrel's inner diameter matches the Australian and New Zealand wide-barrel cartridge standard. Stocked cartridges from grease suppliers in Sydney, Auckland, Perth, Brisbane, Christchurch, and regional stockists drop straight in without adapters. For distributors supplying either market, the wide-barrel DP family is the correct product line to carry because standard-barrel guns will not take the stocked 450 g cartridges in those two countries.
- Dual-piston pump mechanism delivering 2.4 g per full lever stroke. Two pistons work in parallel on every stroke of the handle, so each stroke moves roughly three times the grease of a standard single-piston gun (whose spec is typically 1 g per stroke). On a 60-fitting mining haul truck that takes 240 standard strokes at 1 g each, the S-714DP completes the same service in roughly 100 strokes, closer to a third of the pumping time. On mining-site service routes covering 3-5 machines per shift, the compounded saving is around 30-40 minutes of pumping time recovered per operator day.
- Dual grease inlet for prime reliability. Grease reaches the pump through two separate feed channels in the head instead of one. Priming behaviour on the 900 cc barrel is identical to the 650 cc S-713DP because the dual-inlet architecture is in the head, not dependent on reservoir size. If air gets into one channel (common in cold-morning starts on Tasmanian or South Island NZ operations, during partial-fill reloads when a cartridge empties mid-machine, or after the gun has sat between cropping or mining service cycles), the second channel still feeds the pump.
- Variable stroke mechanism on the long-barrel format. The lever geometry is designed so that a partial swing (say, 30 or 40 percent of the full arc) still builds the full 12,000 PSI pressure at the coupler. On the extra-long 900 cc barrel this matters particularly because the gun's physical length can make a full lever swing impractical on overhead service points, tight-clearance haul-truck suspension housings, and machine structure that blocks the lever arc. The operator can pump through whatever arc is available and still move grease at full pressure.
- High-tolerance CNC-machined aluminium die cast head. The head is cast from aluminium then CNC-finished to tight tolerances, so grease passages, the non-return valve seat, piston bore and coupler thread stay aligned under repeated 12,000 PSI cycling. Lighter than a steel head by roughly 400-500 g on the long-barrel format where cumulative gun weight matters on mining-site service routes.
- Robust barrel in 0.049" (1.2 mm) cold-drawn steel. The barrel wall is drawn through a die at room temperature, which work-hardens the steel for predictable strength at 1.2 mm thickness on the extended length. The thicker wall absorbs dual-piston shock loading and the extra-long wide-barrel geometry is engineered to the same 12,000 PSI pressure rating as the shorter DP variants.
- Extra-heavy follower spring for the taller grease column. A stronger-than-standard compression spring sits behind the follower plate and keeps the grease column pressed firmly against the pump. The spring is sized specifically for the 900 cc barrel height, which carries a grease column 38 percent taller than the 650 cc S-713DP. Standard springs on long-barrel guns can lose prime at half-empty fills because the grease column height exceeds the spring's effective stroke; the heavier spring on the S-714DP maintains positive pressure through the entire reservoir drawdown.
- Rolled threads on the barrel-to-head joint. Rolled threads displace steel under pressure rather than cutting it away, which work-hardens the surface for stronger, smoother engagement. Important on a joint that gets unscrewed every cartridge swap or bulk reload: rolled threads survive thousands of reload cycles without cross-threading.
- Machined non-return valve in the head. A precision-machined one-way valve sits between the pump chamber and the coupler outlet. It opens during a pump stroke and closes between strokes to hold peak pressure, so the grease column does not bleed back. Without it, partial strokes would never build the 12,000 PSI needed to clear a crusted fitting.
- Knurled barrel grip. The barrel surface has a machined cross-hatch pattern that provides tactile grip when hands are oily, gloved, or wet. No moving parts, does not wear out over the life of the gun.
- Non-slip textured powder-coated body. Electrostatic powder coating with a textured surface finish on the head, lever, and reservoir body. Resists corrosion in humid climates, marine service, chemical plants, and wet outdoor use across Tasmanian aquaculture, NZ dairy shed environments, and Queensland coastal service.
- 12,000 PSI (830 bar) maximum working pressure. This is the full pressure rating for any hand-operated grease gun. On mining and large-equipment service where fittings sit outdoors for long intervals between service cycles, the 12,000 PSI rating clears crusted zerks that lower-pressure guns cannot penetrate. Haul truck suspension pins, excavator boom pivots, and wheel loader articulation joints develop particularly stubborn grease crusts between service intervals.
- 4-way loading: 450 g cartridge, bulk pack, suction, filler pump. Grease supply formats vary by operation. Australian and NZ mining service operators buy 450 g cartridges for clean reloads or bulk-pack from 20 kg pails for lower per-kilogram cost. Agricultural contractor operators suction-fill from open containers on remote sites. High-volume mining service depots use filler pumps for rapid reload across multiple guns. The S-714DP accepts all four formats without conversion kits or head swaps.
Features / Loading Options
The S-714DP accepts grease from all four industry-standard supply formats: 450 g cartridge, bulk pack, suction fill, and filler pump. The variable stroke mechanism is part of the same package and lets operators build full 12,000 PSI pressure on partial lever swings.
Variable StrokePartial swings, full pressure
Cartridge Loading450 g (Wide)
Bulk Loading30 oz. / 900 cc
Suction Filling
Filler Pump
How the S-714DP Works
The S-714DP works in three stages: load, prime, pressurise and dispense. On the 900 cc barrel the bulk-fill stage takes slightly longer than on the 650 cc S-713DP, but the service-between-reloads window is correspondingly larger, which is the design intent for haul-truck and large-equipment service.
- Load. Choose one of four loading methods depending on your grease supply. For cartridge fill, retract and lock the plunger rod, unscrew the barrel, peel the metal pull-tab off a standard 450 g wide-barrel cartridge (the Australian and NZ format), insert nose-first, peel the plastic bottom seal, and screw the head back on. The 450 g cartridge sits in the lower portion of the 900 cc barrel with 450 cc of headroom above it; top-up with bulk grease if the full 900 cc is needed for the service cycle. For bulk pack, retract and lock the plunger, unscrew the barrel, dip the barrel mouth into a 5 kg, 15 kg or 20 kg grease pail, and pack grease firmly against the sidewalls with a scoop to fill the 900 cc reservoir (takes around 50-60 seconds of scooping versus 35-40 seconds on a 650 cc gun). For suction fill, retract and lock the plunger with the barrel attached, dip the gun nose into an open grease container, and release the plunger rod slowly so the follower spring draws grease into the reservoir. For filler pump fill, connect a hand-operated or pneumatic filler pump to the 1/8" BSPT inlet on the head and push grease in under pressure.
- Prime. Release the plunger rod from the side-slot lock so the extra-heavy follower spring (sized specifically for the taller 900 cc grease column) compresses the grease against the dual-inlet head. Crack the head a quarter turn to open the air release path, then pump the lever 3 to 5 full strokes with the coupler disconnected. Grease should flow from the head seam on the second or third stroke because both dual-inlet feed channels draw simultaneously, the same priming behaviour as on the 650 cc S-713DP and the rest of the DP family. Retighten the head when grease flows without bubbles. In cold-morning starts on Tasmanian or South Island NZ operations, the dual inlet keeps priming within 5 strokes even when grease has thickened overnight.
- Pressurise and dispense. Connect the hydraulic coupler to a zerk fitting. Each full lever stroke drives both pistons in parallel, moving 2.4 g of grease through the non-return valve into the coupler at up to 12,000 PSI (830 bar). Partial swings still build full pressure thanks to the variable-stroke mechanism, so haul-truck suspension pins with tight lever-arc clearance are reachable. Pump until fresh grease appears at the bearing seal, then disconnect. A 900 cc fill covers roughly 70 typical fittings at 12 g each, or around 60 fittings at 15 g on heavier-duty haul-truck and excavator service. For a typical 60-fitting off-highway dump truck the full machine fits in one reservoir with margin to spare.
The S-714DP runs on lever power only: no battery, no compressor, no electrical supply. Purpose-sized for the Australian and NZ mining, large-equipment, and contractor-route segments where 900 cc per fill covers the largest machines in the fleet. Buyers outside Australia and NZ running 14 oz. (400 g) worldwide cartridges should pick the S-712DP (750 cc high capacity) or S-712DP/PRO (750 cc professional with rubber sleeve), which use the standard 57.15 mm barrel. For AU/NZ buyers needing only the typical-machine 650 cc reservoir, the S-713DP on the same wide-barrel platform is the more portable pick.
| Parameter | Value |
|---|---|
| Model | S-714DP |
| Type | Manual Lever Action Grease Gun - Dual Piston Wide Barrel High Capacity |
| Mechanism | Dual Piston, Lever Type (Hand Operated) |
| Delivers | 2.4 g / Stroke (1 oz. / 12 Strokes) |
| Pressure Developed | 12,000 PSI (830 bar / 83 MPa) |
| Filling Options | Cartridge, Bulk, Suction, Filler Pump (4-way) |
| Cartridge Capacity | 450 g Wide-Barrel Cartridge (Australian / NZ standard) |
| Bulk Capacity | 30 oz. / 900 cc (approximately 820 g) |
| Barrel Diameter (Ø) | 63.5 mm / 2-1/2" (Wide Barrel) |
| Barrel Length | Extra-long (900 cc reservoir capacity) |
| Barrel Wall Thickness | 0.049" / 1.2 mm cold-drawn steel |
| Head Material | CNC-machined Aluminium Die Cast |
| Dual Grease Inlet | Yes (prevents loss of prime in cold weather and partial fills) |
| Variable Stroke | Yes (full pressure on partial lever swings) |
| Body Finish | Non-slip textured powder coating |
| Thread Options | 1/8" BSPT / 1/8" NPT / M10 x 1 / Custom |
| Extension / Hose Size | 6" (150 mm) Steel Extension / 12" (300 mm) Flexible Hose / Both |
| Coupler | Hydraulic coupler (standard), 4-jaw with ball check (optional) |
| Grease Grade Compatibility | NLGI 1, NLGI 2, NLGI 3 (lithium, calcium, aluminium complex, polyurea, moly-fortified EP) |
| Operating Temperature | -10°C to +80°C |
| Primary Market | Australia and New Zealand (450 g wide-barrel cartridge stock) |
| Country of Origin | India (Made in Ludhiana) |
| Certifications | ISO 9001:2015, CE, RoHS compliant |
| HS Code | 8205 |
| Warranty | 1 year against manufacturing defects |
| OEM / Private Label | Available (MOQ applies) |
Every S-714DP ships ready to use with accessories included, in one of three kit configurations.
6" (150 mm) Steel Extension
Hydraulic Coupler
Instruction Manual
12" (300 mm) Flexible Hose
Hydraulic Coupler
Instruction Manual
6" (150 mm) Steel Extension
12" (300 mm) Flexible Hose
Hydraulic Coupler
Instruction Manual
R = Rigid Extension
F = Flexible Hose
RF = Fixed Rigid Extension & Flexible Hose both included
Kits are fully customisable. Additional couplers, connectors, pointed nozzles and other accessories can be included in the box on request. Contact us for custom kit configurations and Australian/NZ-market private-label packaging.
Four engineering and market-fit choices define the S-714DP's position as the 900 cc maximum-capacity wide-barrel member of the dual-piston family, built for Australian and NZ mining and large-equipment service.
The S-714DP's combination of wide-barrel 450 g cartridge compatibility, 900 cc maximum reservoir capacity, dual-piston output, and 12,000 PSI pressure targets Australian and NZ service work on the largest equipment in the fleet.
S-714DP Variants & Related Models
S-711DP Dual Piston Lever Action Grease Gun - Entry Tier (15 oz. / 500 cc)
15 oz. / 500 cc
14 oz. (400 g) cartridge
Entry Tier (Compact Format)
S-712DP Dual Piston Lever Action Grease Gun - High Capacity (24 oz. / 750 cc)
24 oz. / 750 cc
14 oz. (400 g) cartridge
High Capacity (750 cc)
S-712DP/PRO Professional Dual Piston Lever Action Grease Gun (24 oz. / 750 cc)
24 oz. / 750 cc
14 oz. (400 g) cartridge
Pro Tier (Premium Accessory Kit)
S-713DP Dual Piston Lever Action Grease Gun - Wide Barrel (20 oz. / 650 cc)
20 oz. / 650 cc
450 g cartridge
Wide Barrel (Australian/NZ)
Compatible Accessories
Flexible Hoses
Multiple lengths available
(12", 24", 36" and more)
Steel Extensions
Multiple lengths available
(6", 18", 24" and more)
Couplers & Connectors
All types available
(hydraulic, 4-jaw, quick-release)
All Grease Gun Accessories
Full range available
(follower plates, seals, bulk loaders)
Related Product Categories
Buying Guide: When the S-714DP is the Right Choice
The S-714DP is the 900 cc maximum-capacity member of the wide-barrel dual-piston family, purpose-built for Australian and New Zealand mining, large-equipment, and haul-truck service. It is the right pick when machines in the service route have 50+ grease points each, when one-reservoir-per-machine service cycles are required, or when Australian mining-site service contractor economics favour the largest available wide-barrel capacity. It is not the right pick outside Australia and NZ or when smaller machines make the 650 cc S-713DP a better fit.
Pick the S-714DP for Australian mining haul-truck and large-equipment service
NSW, WA, SA, and Queensland pit operations where off-highway dump trucks have 60 or more grease points per machine: the 900 cc reservoir carries enough grease to cover the full machine on one fill. On 650 cc guns the same service forces a mid-machine reload. The dual-piston 2.4 g per stroke output cuts total pumping time by roughly a third versus standard single-piston wide-barrel guns, recovering measurable operator time on 5-day mining service rosters covering 10-15 machines.
Pick the S-714DP for broadacre contractor and forestry fleet service
Combine harvesters, air seeders, NZ and Tasmanian forestry skidders and feller bunchers with high fitting counts per machine: the 900 cc capacity covers the largest machines without reload interruption, and the wide-barrel 450 g cartridge format matches the stocked supply in regional Australian and NZ agricultural merchants. For seasonal contractor routes where operator time on the tractor is billed, reload breaks are margin lost; the S-714DP's extra capacity reduces those breaks.
Step down to the S-713DP for typical-machine service under 50 fittings
For standard farm tractors, backhoes, mid-size wheel loaders, and service routes where a typical machine has fewer than 50 grease points, the S-713DP at 650 cc is the more practical pick. Same wide-barrel 63.5 mm platform, same 450 g cartridge compatibility, same dual-piston mechanism, same 12,000 PSI. The extra 250 cc of the S-714DP is only useful when machine fitting counts exceed what 650 cc covers, which in practical terms means 50+ fittings per machine.
Outside Australia and NZ: pick the standard-barrel S-712DP or S-712DP/PRO
The S-714DP uses the 450 g wide-barrel cartridge stocked primarily in Australia and NZ. In the UK, Europe, North America, Asia, Africa, Middle East, and Latin America, the stocked cartridge is the 14 oz. (400 g) format. For buyers in those regions pick the S-712DP (750 cc high capacity) or S-712DP/PRO (750 cc professional with rubber sleeve), which use the 57.15 mm standard barrel.
Consider the Quadra-Cut steel S-710L for drop-heavy wide-barrel environments
Australian mining pit-side service, NZ forestry bush work, rough construction and quarry yards where the gun gets dropped onto concrete or rock: aluminium die cast heads can crack from repeated hard impacts. The S-710L uses a forged steel head with Quadra-Cut Precision machining at 900 cc wide-barrel capacity and the same 12,000 PSI rating. Trade-off: heavier gun, single-piston output (1 g per stroke), no variable stroke. Pick S-714DP for pumping speed and cold-weather priming; pick S-710L for drop tolerance on rough-service mining and forestry yards.
For Australian and NZ mining service distributor trade
The S-714DP is a distinctive specialty-industrial SKU for Australian and NZ distributors serving mining service contractors, large-equipment dealerships, broadacre farm machinery merchants, and port/bulk-handling maintenance suppliers. The wide-barrel + dual-piston + 900 cc combination is rare in the 12,000 PSI lever-gun category and commands specialty-industrial margins. Contact the STAR export team for Australian/NZ-market private-label packaging, BSPT thread variants, mixed-container consolidation to Sydney, Perth, Brisbane, Newcastle, Auckland, and regional mining-hub ports.
Frequently Asked Questions: S-714DP Wide Barrel High Capacity Dual Piston Lever Action Grease Gun
What makes the S-714DP different from the S-713DP?
The S-714DP carries 900 cc of bulk grease versus the S-713DP's 650 cc, an extra 250 cc (38 percent more capacity) on the same wide-barrel platform. The extra capacity comes from an extended-length barrel at the same 63.5 mm inner diameter, plus a matched heavier follower spring for the taller grease column. Dual-piston pump, 12,000 PSI pressure, dual grease inlet, variable stroke, and 450 g cartridge compatibility are identical across both models. The S-714DP is the correct pick when machines in the service route have 50+ grease points each; the S-713DP is correct for typical 30-40 fitting machines where portability matters more than reservoir size.
Why is the S-714DP sized at 900 cc specifically?
A typical Australian mining off-highway dump truck has 60 or more grease points at 12-15 grams each, needing 720-900 grams of grease per full service. The 900 cc reservoir (approximately 820 g of grease) covers the full machine on one fill with safety margin, which is the design-target service cycle. Smaller reservoirs force a mid-machine reload on haul-truck service, breaking the service flow and forcing a walk back to the grease pail. 900 cc is the specific capacity that fits the largest machine category in the Australian and NZ mining and broadacre fleet, while staying manageable as a hand-held lever gun (beyond 1000 cc the gun becomes too long and heavy for single-handed manoeuvring between fittings).
How many grease fittings can a 900 cc wide-barrel reservoir service per fill?
At 12 grams of grease per fitting, a 900 cc bulk reservoir covers approximately 70 fittings per fill. At 15 grams per fitting on heavier-duty mining and excavator service, approximately 60 fittings. In practical operation this means one complete haul-truck chassis service (60+ fittings), or one large wheel loader plus a backhoe in a single service cycle, or multiple smaller machines on a contractor route. The 900 cc capacity is specifically sized to exceed the fitting count of the largest machines in the Australian and NZ mining and equipment fleet, which is where the extra capacity over the 650 cc S-713DP pays back.
Is the S-714DP noticeably heavier than the S-713DP?
Yes, approximately 300-400 g heavier when bulk-filled, about 150 g heavier empty. The empty-weight difference comes from the longer barrel (extra steel for the extended reservoir). The fully-loaded difference grows because the 250 cc extra capacity adds approximately 225 g of grease. On full-shift mining service routes the extra weight is a measurable carry fatigue factor over a 5-day roster; for operators working at or near typical 650 cc machine fitting counts, the 650 cc S-713DP is the lighter-carry pick. For operators servicing consistently 50+ fitting machines, the time saved by avoiding mid-machine reloads offsets the extra carry weight.
Can I use 14 oz. (400 g) cartridges in the S-714DP wide barrel?
Not recommended. The 63.5 mm wide barrel is sized for the 450 g cartridge diameter; a 14 oz. (400 g) cartridge is physically smaller and will not seat properly, leaving the cartridge loose in the barrel and causing pumping and priming problems. Buyers in Australia and NZ should stock 450 g cartridges, which are widely available at rural supply stores, agricultural merchants, mining service suppliers, and industrial-supply distributors. Buyers expecting to use 14 oz. cartridges should pick the standard-barrel S-711DP, S-712DP, or S-712DP/PRO, which have a 57.15 mm inner diameter correctly sized for the 14 oz. cartridge format.
What happens if I over-pressurise a bearing with a 12,000 PSI grease gun?
A bearing seal typically fails at 500 to 1,500 PSI of internal grease cavity pressure, far below the 12,000 PSI the gun can develop. The gun's 12,000 PSI specification is the maximum pressure the pump can build at the coupler when the fitting is completely blocked; actual pressure reaching the bearing seal depends on the fitting's flow restriction. To prevent over-pressurising: stop pumping the moment fresh grease appears at the bearing seal or the lever resistance increases sharply. On a fitting that feels blocked, do not force repeated high-pressure strokes; investigate the fitting (may need cleaning or replacement) rather than trying to push through with more pressure. Damaged bearing seals leak oil and grease, allowing contamination ingress and bearing failure within weeks.
Can a 12,000 PSI grease gun cause an injection injury?
Yes. Grease injection injuries from high-pressure grease guns are well-documented in emergency medicine and are surgical emergencies requiring immediate treatment. A 12,000 PSI pinhole in a hose, an unseated coupler, or a grease stream aimed at skin can drive grease through intact skin and into deep tissue. The initial wound looks like a tiny puncture and often does not hurt much initially. The grease migrates along tissue planes and causes chemical damage that only becomes visible as swelling, colour change, and infection over 24-72 hours. Go to an emergency department immediately for any suspected injection injury, brief the staff it is a high-pressure grease injection (not a simple puncture wound), and do not wait for pain to develop. Untreated grease injections can progress to tissue necrosis and amputation.
What PPE is needed for a 12,000 PSI dual piston grease gun?
Mandatory: wraparound safety glasses (ANSI Z87.1+ impact-rated), nitrile chemical-resistant gloves, long sleeves, closed-toe steel-capped boots, long trousers. Safety rules: never point the coupler or hose at any body part, keep the non-lever hand behind the coupler head during pumping, inspect the 300 mm flex hose before each use for cracks, bulges, or stiffness, and never test grease flow by pressing the coupler against skin or fabric. At 12,000 PSI a compromised hose or unseated coupler can drive grease through intact skin and cause injection injury. These PPE rules apply equally to the S-714DP and the rest of the 12,000 PSI lever gun family; the larger reservoir does not change the pressure rating or the PPE requirement.
How does variable stroke help on the longer 900 cc wide-barrel?
The extra-long barrel makes full lever swings physically impractical on tight-clearance fittings that the S-713DP or smaller guns could just reach. Variable stroke compensates by building full 12,000 PSI pressure on partial lever arcs. Common scenarios on haul trucks: suspension strut fittings sit between chassis members where the long gun barrel blocks a full arc, kingpin fittings behind wheel housings where overhead clearance is limited, and body pivot fittings under low-clearance dump-bed structure. On fixed-stroke long-barrel guns these fittings become a pumping problem or get skipped. The S-714DP's variable stroke lets the operator pump through whatever arc the machine structure allows and still build the 12,000 PSI needed for crusted zerks.
Is the S-714DP too large for home workshop use?
Yes for most home workshop use. The 900 cc reservoir and extended barrel length are sized for large-equipment service; on a home tractor with 15-25 grease points, most of the reservoir sits unused between service cycles, accelerating oil separation from the grease. For home workshop service on light tractors, ride-on mowers, ATVs, and motorcycle maintenance, the compact S-711DP at 500 cc is the correct pick, or a small pistol-grip gun for occasional use. The S-714DP pays back when the operator services consistently large machines where the 900 cc capacity is used up in single or near-single service cycles.
Can I use the S-714DP on a mining haul truck in Australia?
Yes, and this is one of the primary design targets for the S-714DP. Australian off-highway mining dump trucks (iron ore and coal in WA and NSW, coal in QLD, copper and gold in NSW, SA, and WA) have 50-70 grease points across suspension struts, kingpins, driveshaft centre bearings, and body pivots. At 12-15 grams per fitting the full machine service uses 600-1050 grams of grease. The 900 cc S-714DP covers most haul trucks on one reservoir, the 12,000 PSI pressure clears crusted zerks that pit-exposed equipment accumulates between service cycles, and the dual-inlet priming keeps the pump reliable across temperature-cycling mining-site conditions. The 450 g wide-barrel cartridge format matches the stocked supply in Australian mining service depots.
Why does my dual piston grease gun lose prime after a cartridge change?
Air enters the pump during the cartridge change as the operator retracts the plunger rod, unscrews the head, and exposes the pump chamber to atmosphere. On single-inlet guns this air often stays trapped in the feed channel after the new cartridge is installed, causing priming failure. On the S-714DP's dual-inlet head, air can enter either channel during reload but the second channel typically still feeds grease on the first stroke after reload, so priming succeeds within 3 to 5 strokes. If priming fails after 5 strokes: check that the plunger rod is fully released from the side-slot lock so the follower spring compresses the grease column, inspect the bulk grease or cartridge seating for air voids, and in cold weather give the grease 5-10 minutes at operating temperature before reloading.
Why does the coupler get stuck on a zerk fitting?
Residual hydraulic pressure locks the coupler jaws onto the zerk after pumping stops. At 12,000 PSI the lock force is too strong to pull free by hand, and forcing it usually damages the coupler jaws or the zerk. To release safely: crack the head a quarter turn to bleed the barrel pressure back through the non-return valve, wait 5-10 seconds for the grease column to depressurise, then the coupler pulls cleanly off the zerk. If the coupler still resists, check for worn coupler jaws (replace the coupler) or a damaged zerk flange (replace the zerk). Never hammer the coupler or use pliers to force it free. On the S-714DP the pressure-release procedure is the same as any other 12,000 PSI DP family member: bleed the head, then disconnect.
What NLGI grade grease is right for cold-weather wide-barrel service?
For service at or below 5°C ambient, switch to NLGI 1 grade grease; for Tasmanian winters, NZ South Island, or alpine service below 0°C, NLGI 0 or NLGI 00 are appropriate for pumpability. Standard NLGI 2 grease, the default for most service, thickens significantly in sub-5°C conditions and increases pumping effort and priming difficulty on any lever grease gun. NLGI 1 at the same temperature pumps freely through the dual-piston mechanism and primes within the expected 3-5 strokes on the S-714DP. For mixed service through an Australian winter cycle, many operators carry two guns: one loaded with NLGI 2 for summer and autumn, one with NLGI 1 for winter and spring service. Switching grades in a single gun requires a full solvent flush between the two chemistries.
How should I store the S-714DP long-term between work seasons?
For storage between Australian cropping seasons or mining shutdown cycles exceeding 30 days: drain the reservoir, disassemble the head and barrel, wipe the barrel interior with a lint-free rag dampened with mineral spirits, dry completely, reassemble with a light film of grease on the plunger-rod seal, cap the coupler, and store horizontally in a clean dry shed or workshop. The 900 cc barrel is particularly susceptible to oil separation if left loaded for long periods because the grease column height is large and gravity-assisted oil drainage has more runway; draining the reservoir before storage prevents the separation problem. For storage under 30 days the gun can be left loaded provided the plunger rod is released and the coupler is capped. Store out of direct sunlight to prolong powder-coat and hose-rubber lifespan.
What accessories are included with the S-714DP in the box?
The standard kit includes the gun, hydraulic coupler, and either a 150 mm steel extension (S-714DP/R configuration), a 300 mm flexible hose (S-714DP/F configuration), or both (S-714DP/RF configuration), plus the instruction manual. Kit configuration is specified at order time. For distributor bulk orders wanting additional accessories (pointed connectors for flush-mount fittings, 4-jaw couplers, alternative hose lengths, locking couplers), custom kit bundles are available against MOQ. The base S-714DP does not include the rubber sleeve fitted on the pro-tier S-712DP/PRO; the wide-barrel family does not currently offer a Pro-tier variant with bundled rubber sleeve.
How many 450 g cartridges are equivalent to one 900 cc bulk fill?
Approximately two 450 g cartridges equal one 900 cc bulk fill (900 g versus 820 g actual grease mass in the bulk reservoir, accounting for air gaps during bulk packing). This means one bulk fill carries approximately twice the grease of a single-cartridge reload. For operators choosing between cartridge and bulk supply economics: cartridges are cleaner and more convenient for occasional service, bulk costs less per kilogram for high-volume service. The S-714DP's 4-way loading accepts both so the operator can switch based on what's at hand without conversion kits. For mining-site service where the depot stocks 20 kg or 50 kg grease pails, bulk fill is the predominant method.
Can I order the S-714DP under my own Australian or NZ distributor brand?
Yes, OEM and private-label manufacture is available on the S-714DP for Australian and NZ distributors, including custom branding, packaging design for local retail or industrial-supply format, BSPT thread as default for these markets, and kit configuration per agreement. MOQ depends on customisation level: product-level rebranding (logo and packaging only) has a lower MOQ than full thread or kit-spec customisation. Shipping is sea freight to Sydney, Melbourne, Perth, Brisbane, Newcastle, Auckland, or Christchurch as common Australia/NZ hub ports, with mixed-container consolidation across other STAR products (pistol grip guns, dispenser buckets, accessories) possible to hit MOQ thresholds economically. Contact the STAR export team for distributor pricing, lead times, and packaging specifications.
Why Global Buyers Trust STAR
We at STAR have manufactured lever action grease guns in our ISO 9001:2015 certified workshop since 1980. The S-714DP ships with full export documentation and multilingual manuals, and is a distinctive SKU for Australian and New Zealand distributors targeting mining service suppliers, large-equipment dealership service, forestry equipment retail, and broadacre contractor supply trade channels.