Manual metering pumps for oil, coolant, and diesel fuel

Frequently Asked Questions About Manual Dosing Pumps

When liquids need to be not only extracted or filled but also processed in controlled quantities, a graduated pump cylinder offers a decisive advantage. The pump volume, fluid, accessibility, and required adapter determine which Leitenberger manual metering pump is suitable for the specific workshop task. Here, we answer frequently asked questions about the selection and use of Leitenberger manual metering pumps.

• What is a manual metering pump?

  A manual dosing pump is a manually operated pump that can be used to draw in liquid and then dispense it in a controlled manner.
  
  What sets it apart from a simple manual suction pump is the transparent pump cylinder with ml markings.
  
  This allows the amount of liquid drawn in to be checked directly on the pump cylinder.

• What types of manual metering pumps does Leitenberger offer?

  Currently, three sizes are available:

  • HDP 500 – 500 ml
  • HDP 1000 – 1,000 ml
  • HDP 2000 – 2,000 ml

  All three models feature a Plexiglas pump cylinder with ml markings.

• Which manual dosing pump should I choose?

  The selection is primarily based on:

  • the required volume of liquid
  • the available workspace
  • the number of pumping cycles required
  • accessibility of the dispensing or filling point

  For smaller volumes, the HDP 500 is particularly compact.

  For regularly larger volumes of liquid, the HDP 1000 and HDP 2000 reduce the number of pumping cycles required.

• When is the HDP 500 a good choice?

  The HDP 500 has a pump volume of 500 ml.

  It is particularly suitable for:

  • small and medium quantities of liquid
  • precise adjustment quantities
  • work in confined spaces
  • applications where the dispensed quantity needs to be directly controlled.
• When is the HDP 1000 a good choice?

  The HDP 1000 has a pump volume of 1,000 ml, or one liter.
  
  This allows it to draw in larger volumes per pump stroke than the HDP 500.
  
  It therefore offers a good balance between portability and a larger draw volume.

• When is the HDP 2000 appropriate?

  The HDP 2000 has a pump volume of 2,000 ml, or two liters.
  
  It is currently the largest manual dosing pump in this product line and is particularly well-suited for the controlled intake or dispensing of larger volumes of liquid.

• Why is the pump cylinder transparent?

  The pump cylinder is made of Plexiglas.

  This allows for visual monitoring of the fluid during operation.

  This is helpful, for example, for:

  • seeing the fluid being pumped
  • detecting changes in the fluid
  • detecting air in the pump cylinder
  • reading the fluid volume on the scale.
• What is the purpose of ml scaling?

  The scale allows for direct volume measurement on the pump cylinder.

  This makes it possible, for example, to check:

  • how much liquid has been dispensed
  • how much should be dispensed
  • whether a specific correction amount has been reached

  The manual metering pump is therefore particularly well-suited for tasks where the volume of liquid is important.

• Is a manual metering pump a precise measuring device?

  The scale is used for controlled volume measurement during workshop and service work.
  
  The product pages describe the pumps as systems for accurate or controlled dispensing and filling, but do not classify them as calibrated laboratory or precision measuring instruments.
  
  If an application requires metrologically defined accuracy, an appropriately suitable measurement method must be used.

• What types of liquids can be processed using the manual metering pumps?

  Typical applications include, for example:

  • Engine oil
  • Transmission fluid
  • Coolant
  • Diesel

  Before use, verify that the specific fluid is compatible with the pump, hose, and seals. The current category excludes gasoline, acids, alkalis, and brake fluid.

• Can engine oil be dispensed using a single-hand dispenser?

  Yes.

  HDP 500, for example, is specifically designed for engine oil.

  A manual metering pump can be particularly useful when a specific amount of engine oil needs to be:

  • removed
  • topped off
  • adjusted.

  For more advanced tasks, testing and service equipment for engine lubrication and oil service is available.

• Can transmission fluid be dispensed using a manual metering pump?

  Yes.

  Suitable manual metering pumps can be used for gear oil applications; the HDP 500 is specifically designed for this purpose.

  However, when performing a complete gear oil service, a distinction must be made between simple fluid transfer and a vehicle-specific filling procedure.

  Gear oil filling pumps and filling adapters are available for such tasks.

• Can a transmission be filled directly using a manual metering pump?

  That depends on the specific transmission and the prescribed service procedure.

  For simple fill points, a suitable hand pump can generally be used.

  However, many modern transmissions require:

  • specific fill adapters
  • a defined oil temperature
  • a specific oil level procedure
  • vehicle-specific steps

  For this purpose, transmission oil fill pumps and fill adapters are the more suitable product group.

• Can coolant be dispensed using a single-hand dispensing pump?

  Yes.

  The HDP 500 is specifically designed for use with coolant.

  It can be used, for example, to drain or fill smaller or specific amounts of coolant.

  For evacuating and completely filling a cooling system, however, radiator vacuum fillers are available.

• Can diesel be dispensed using a hand-operated dispenser?

  Yes.

  Diesel is one of the applications specifically listed for the HDP 500.

  For specialized work on the fuel system, fuel extraction and delivery devices as well as other test and diagnostic equipment for fuel systems are also available.

• Can gasoline be dispensed using the manual dispensing pumps?

  No.
  
  The category explicitly states that manual metering pumps are not intended for use with gasoline.
  
  Only equipment and procedures specifically approved for highly flammable liquids may be used.

• Can brake fluid be dispensed using a one-hand dispensing pump?

  No.

  All three current product pages explicitly state that HDP pumps are not suitable for brake fluid.

  For brake fluid, you should use brake bleeding devices and suction systems designed for that purpose.

• Can acids or alkalis be handled using the manual metering pumps?

  No.
  
  The manual metering pump category expressly excludes acids and alkalis.
  
  Incompatible fluids can damage pump components, hoses, and seals.

• Why is media compatibility important?

  Different liquids can place varying degrees of stress on pump materials and seals.

  An unsuitable fluid can, for example:

  • corrode plastics
  • damage seals
  • cause leaks
  • impair pump function
  • introduce residues into another fluid

  Therefore, a hand pump should only be used with suitable fluids.

• Can the same manual metering pump be used for different liquids?

  In general, a pump may be suitable for multiple approved fluids.

  However, residual amounts may remain in:

  • the pump cylinder
  • the hose
  • the adapters.

  If mixing different fluids is not permitted, separate pumps should be used or defined cleaning procedures should be followed.

• Is that especially important when dealing with different types of oil?

  Yes.
  
  Engine and transmission oils may have different specifications and additive systems.
  
  If residual amounts of a previously used oil remain in the pump system, they can contaminate the new fluid.
  
  For sensitive applications, it is therefore advisable to clearly identify which pump corresponds to which oil.

• How long is the hose that comes with it?

  The current HDP 500, HDP 1000, and HDP 2000 models each come with a 1-meter-long transparent suction and discharge hose.
  
  In addition, each model includes an extra thin hose for specific applications.

• Why is the hose transparent, too?

  The transparent hose allows for visual monitoring of the pumping process.

  This makes it possible, for example, to determine:

  • when liquid is being drawn in
  • whether air is being drawn in
  • when the fluid reaches the pump

  This facilitates controlled suction and filling operations.

• What is the difference between a manual dosing pump and a manual suction pump?

  A hand-operated suction pump is primarily designed for the precise intake and subsequent dispensing of a liquid.

  The hand-operated dosing pump also features:

  • a transparent pump cylinder
  • a ml scale

  This allows you to directly monitor the amount of liquid drawn in.

  When the amount is important, the hand-operated dosing pump is therefore the more suitable option.

• What is the difference between a manual dosing pump and a manual transfer pump?

  A hand-operated transfer pump is primarily designed for the continuous transfer of a liquid from one point to another.

  It has separate suction and discharge sides, so that the fluid is drawn in when the pump is pulled and is immediately discharged when it is pushed.

  A hand-operated metering pump, on the other hand, is particularly useful when the volume drawn in or dispensed needs to be controlled via the pump cylinder.

• What is the difference between the HDP 500 and the HAP 500T?

  Both pumps have a transparent pump cylinder with graduations, but they serve different purposes.

  HDP 500

  • Manual Dosing Pump
  • 500 ml pump volume
  • transparent volume indicator
  • precise filling and dispensing

  HAP 500T

  • Manual Transfer Pump with Dual Connections
  • 500 ml per stroke
  • separate suction and discharge sides
  • continuous transfer in a single operation
  • scale from 0–500 ml in 10-ml increments.

  If a specific volume needs to be drawn up or dispensed, the HDP 500 is the classic dosing solution. If liquid needs to be continuously transferred from one point to another, the HAP 500T is better suited for this type of operation.

• What is the difference between a manual dosing pump and a vacuum suction device?

  A manual metering pump is operated entirely by hand and draws the liquid into the pump cylinder.

  A vacuum suction device with a collection container operates using stored negative pressure and can handle significantly larger volumes of liquid.

  The manual metering pump is therefore particularly suitable for controlled small and medium volumes.

  For suction volumes of several liters, a vacuum suction device is often more efficient.

• When is a manual metering pump better than a vacuum box?

  A manual metering pump is particularly useful when:

  • a specific amount is required
  • only small or medium quantities are being processed
  • compressed air is not available
  • a compact setup is desired
  • the liquid needs to be visually monitored

  A vacuum box, on the other hand, offers advantages for larger extraction volumes.

• When is a manual suction pump better than a manual metering pump?

  A hand-operated suction pump may be sufficient if the goal is simply to remove liquid and precise volume measurement is not important.

  It features a sturdy aluminum pump cylinder and is available in various sizes.

  If the volume needs to be monitored on the pump cylinder, the hand-operated metering pump offers an additional advantage.

• How do you reach hard-to-reach dispensing or filling points?

  Adapters for manual suction and manual dosing pumps are available for this purpose.

  Different adapter shapes and lengths make it possible to better adapt the pump to:

  • narrow openings
  • liquids located at a lower level
  • hard-to-reach areas.
• Can the adapters for manual suction pumps also be used with manual metering pumps?

  The corresponding Leitenberger subcategory is specifically designed as adapters for manual suction and dosing pumps.

  To determine which specific adapter model is compatible with which pump and application, you should check the respective product assignments.

• Can a manual metering pump be used for liquid samples?

  In general, a manual dosing pump can be used to draw a specific volume of liquid.

  For analytical samples, however, it is essential to ensure that:

  • the pump cylinder
  • the tubing
  • and the adapter

  are clean and that no residual media affect the sample.

  For reproducible media analyses, a sampling procedure specifically designed for this purpose should be used.

• Can the liquid that was removed be poured back in afterward?

  Technically, the collected fluid can be safely drained.

  Whether it can be reused, however, depends on:

  • Service specifications
  • The condition of the fluid
  • Possible contamination
  • Possible mixing.

  The relevant vehicle and manufacturer specifications should be followed.

• Does the manual dosing pump need to be cleaned after use?

  That depends on the fluid being used and the next application.
  
  Especially when changing fluids, care must be taken to prevent residual fluid from contaminating the next fluid.
  
  In professional workshops, it may therefore be advisable to assign specific pumps to specific fluids.

• Are there replacement parts for the manual dosing pumps?

  Yes.

  For example, separate Plexiglas pump cylinders are available as replacement parts for the current pumps:

  • ET 664 for HDP 500
  • ET 718 for HDP 1000
  • ET 734 for HDP 2000.

  This allows the relevant components to be replaced as needed without necessarily having to replace the entire pump.

• Do manual metering pumps require electricity or compressed air?

  No.
  
  The pumps are manually operated.
  
  This makes them suitable for mobile service work and locations where neither electricity nor compressed air from a workshop is available.

• Which manual dosing pump is best suited for mobile service technicians?

  In general, all three HDP models are portable.

  The appropriate size depends on the typical service tasks:

  • 500 ml for compact tasks and smaller quantities
  • 1,000 ml as a more versatile size
  • 2,000 ml for larger quantities of liquid

  The available space on the vehicle or machine should also be taken into account.

• What equipment is recommended for controlled fluid handling?

  Depending on the workshop task, a combination of:

  • hand-operated metering pumps for controlled volumes
  • hand-operated suction pumps for targeted extraction
  • hand-operated transfer pumps for continuous flow
  • adapters for hand-operated suction and metering pumps for hard-to-reach areas
  • vacuum extraction units for larger extraction volumes

  may be useful.

  You can find additional solutions under Pumps and Fluid Handling for Automotive Workshops.