TBH TECHNIK | CASE STUDY NO. 1 | HYDRAULICS

CKD Programme – Flexible replacement for hydraulic pumps

As a certified Bosch Rexroth partner, TBH Technik offers a solution for customers facing hydraulic system failures, long delivery times, or the need to replace existing components.

Thanks to the CKD programme, our company TBH Technik can flexibly configure and deliver AZPF gear pumps directly from stock components – in as little as 72 hours.

Bosch Rexroth AZPF gear hydraulic pumps with delivery within 72 hours

Hydraulic pump failure is one of the most common and costly problems encountered by operators of mobile machinery, agricultural equipment, construction plant, and industrial lines. Every hour of downtime means direct financial losses – with a standard OEM solution, you wait 1 to 4 weeks for a spare part. Original Equipment Manufacturer.)

TBH Technik offers a solution – a complete system for configuring, assembling, and delivering AZPF gear pumps directly from stock components. The result: Functional, custom-built hydraulic pump within 72 hours of your order.

Ilustrácia doručenia priemyselného čerpadla nákladným autom do 72 hodín.

Why do tractor and machinery hydraulic pumps fail?

Operators mobile equipment hydraulic systems faces several typical scenarios where they require prompt professional assistance:

  • Unplanned failure of the gear pump (cavitation, wear, contaminated hydraulic oil)
  • Long delivery times for original OEM parts – typically 1 to 4 weeks, or even months for less common types
  • The need for replacement of a hydraulic pump from another manufacturer during modernisation, retrofit or repair without available OEM parts
  • Specific configuration requirements – shaft type (SAE, DIN, tapered), flange, direction of rotation, sealing
  • Tandem or triple pumps not stocked by the standard distributor

The consequences are always the same: production downtime or seasonal work stoppages, financial losses, and pressure on the service team. It is precisely for these situations that it was designed CKD programme from TBH Technik.

“The company's cost for hydraulic failure can range from 200 to 5000 euros per hour, which can cause potential losses of tens of thousands to hundreds of thousands of euros for downtime and waiting for an original spare part.”

CKD Programme: Rapid Assembly of AZPF Hydraulic Pump

CKD (Completely Knocked Down) is a system where TBH Technik does not store completed pumps, but rather maintains all necessary components in stock, AZPF series – and will assemble precisely the variant of Bosch Rexroth gear pump that the customer needs. Thanks to this, Delivery time maximum 72 hours instead of weeks of waiting for the OEM.

Procedure – from fault to functional hydraulic pump:

StepPhaseDescription
1Contact and analysisThe customer will provide the parameters of the original pump: geometric volume, working pressure, flange type, shaft type and size, direction of rotation, seal type. The manufacturing number or a photograph of the old pump is also sufficient.
2Identification and configurationTBH Technik's hydraulic specialists identify the original model and configure an equivalent or more powerful AZPF variant from stock components.
3Assembly from stock componentsThe pump is physically assembled and checked directly at TBH Technik – without waiting for the OEM manufacturer or an external supplier.
4Testing and MarkingEvery pump from the CKD programme undergoes output testing and is marked with a TBH Technik production number for full traceability.
5Delivery within 72 hoursThe fully functional AZPF pump is delivered directly to the customer's site – including the option of express delivery for critical failures.

Bosch Rexroth AZPF Gear Pumps – Technical Basis of the CKD Programme

The core of the CKD programme is the modular family of Bosch Rexroth AZPF gear pumps. The AZPF series is designed for demanding applications in both mobile and industrial hydraulics and offers exceptional configuration variability – from compact single-stage pumps for tractor control to powerful triple pumps for heavy construction machinery.

The AZPF series covers the following key parameters:

  • Volume range: 4 – 22.5 cm³/ot
  • Maximum working Pressure: up to 250 bar
  • Various variants:
    • Shafts (tapered, splined, SAE, DIN)
    • Flanges (SAE, European standards)
    • Seals: NBR (standard oil environment) and FKM (chemically aggressive media, bio-oils)
    • Rotation direction: left/right – when viewed from the drive shaft
  • Option tandem and triple pumps
Schéma rôznych konfigurácií hydraulických zubových čerpadiel.
Fig. 1: Bosch Rexroth AZPF modular gear pump family – from single to triple configurations (Source: TBH Technik)

Combination options – why AZPF is the most flexible solution on the market

One of the key advantages of the AZPF series and the TBH Technik CKD programme is exceptional breadth of configuration options. Each pump consists of several independently selectable modules – and it is this modularity that allows TBH Technik to assemble the precise equivalent of practically any gear pump in the market.

Technická špecifikácia a konfigurácia komponentov pre hydraulické čerpadlá.
Fig. 2: AZPF gear pump configuration table – geometric volume, drive shaft, front cover and connection method (Source: TBH Technik)

1. Number of stages – single-stage, two-stage, and three-stage pumps

The AZPF series offers three basic configurations in terms of the number of stages:

  • Single-stage pump – single geometric volume, ideal for simple hydraulic circuits (control, stabilisers, simple drives)
  • Two-stage (tandem) pump – two independent volumes in one housing, driven by a single shaft. Standard solution for tractors with multiple hydraulic circuits (steering + working implement)
  • Three-stage pump – three geometric volumes, driven by a single shaft. For demanding mobile machines with multiple simultaneous hydraulic functions (excavators, municipal machinery, special tractors).

Each stage of a tandem or triple-stage pump can have a different displacement, allowing for precise flow matching for each individual hydraulic circuit.

2. Drive shaft – 4 variants for all standards

Selecting the correct drive shaft is key for a direct replacement without any mechanical modifications to the machine. TBH Technik offers the following variants as part of the CKD programme:

CodeShaft typeTypical application
CTaper shaft 1:5Tractors, agricultural machinery, PTO drives
NShaft for a driveIndustrial drives with direct motor coupling
FSplined DIN 5482 B17x14European industrial applications, hydraulic blocks
RSplined SAE J744 16-4 9TMobile technology according to American standards, construction machinery

Thanks to this wide range of variants, TBH Technik can replace virtually any hydraulic pump without needing to modify the adapter or drive shaft.

3. Front cover and flange – SAE and European standards

The front pump cover determines the connection method to the drive unit and must precisely match the existing flange on the machine. AZPF offers 8 variants:

CodeFront cover/flange typeTypical application
BRectangular Ø80 mm / 100×72Standard European flange, industrial machinery
ORectangular Ø36.47 mmCompact applications, small hydraulic blocks
RSAE J744 82–2 (A) / Ø82.55 mmMobile equipment SAE standard, American machinery
P2 openings Ø50 mm, Variant PSpecific industrial applications of variant P
T4 holes Ø52 mm, O-ringHigh-pressure industrial applications

The combination of SAE and European (DIN) standards in a single product series is key for TBH Technik – this allows for the replacement of pumps from practically any global manufacturer without modifications to the hydraulic system.

4. Geometric volumes – 9 values for accurate flow coverage

The geometric displacement of the pump directly determines the flow rate of the hydraulic medium at a given drive speed. The AZPF series covers the range of 4 – 22.5 cm³/rev in 9 steps:

Capacity [cm³/rev]Typical application and use
4,0Low-power circuits, control, power steering for small tractors
5,0Auxiliary hydraulic circuits, valve control
6,3Standard support circuits in mobile technology
8,0Operation of medium-sized tractors and municipal vehicles
11,2Tractor work equipment, municipal machinery
14,0Power circuits, drive for excavator working equipment
16,0Heavy mobile and industrial hydraulics
19,0High-flow applications, large presses, and pressing equipment
22,5Maximum volume of AZPF series, heavy-duty machinery and tractors

With tandem and triple pumps, different volumes can be combined on each stage – e.g. 11.2 + 8.0 + 4.0 cm³/rev for a tractor with three independent hydraulic circuits.

5. Seals – NBR and FKM for all types of hydraulic oil

Choosing the correct seal material is critical for pump longevity. TBH Technik offers two basic options within the CKD programme:

  • NBR (nitrile rubber) – standard choice for mineral hydraulic oil HLP. Resistant in the range of -30°C to +100°C. Suitable for the vast majority of mobile and industrial applications.
  • FKM (fluoropolymer) – for biodegradable hydraulic oils (HETG, HEES), phosphate esters and chemically aggressive media. Resistant up to +150 °C. Required in the food industry and ecologically sensitive areas.

CKD programme versus standard OEM solution – detailed comparison

The following table and graph display the key differences between waiting for OEM parts and the swift resolution through TBH Technik's CKD program:

ParameterOEM solutionWith the CKD programme TBH EngineeringImprovement
Delivery time1 – 4 weeks (OEM manufacturer)Within 72 hours↓ 90 %
ConfigurabilityLimited, standard types onlyFully modular – thousands of variants++
Replacement of other manufacturersRequired OEM parts, long searchImmediate replacement from stock
Machine standby7 – 14 days (average)Max. 3 days including installation↓ 78 %
Financial lossesThousands of € for every day of downtimeDramatically reduced↓ 75 %+
Technical SupportManufacturer's telephone supportPersonal hydraulic specialist
Working pressureLimited by the available modelUp to 250 bar (AZPF series)
Geometric volumeLimited stock4 – 22.5 cm³/each in stock
SealsStandard NBRNBR and FKM (chemically resistant)++
Tandem pumpsSpecial order, weeksWe deliver directly from stock
■ = status without CKD program ■ = status with CKD program TBH Technik

Custom pump replacement

The CKD programme allows for the effective replacement of pumps from various manufacturers:

  • Interface compatibility (flanges, shafts),
  • connection variability,
  • option of retaining the original installation without modifying the system.
Hydraulické zubové čerpadlo s technickými špecifikáciami v slovenčine.

TBH Technik Review:

  • identify the original pump,
  • suggest an equivalent,
  • provide a functional replacement in a short time.

Stock components – speed

Thanks to the stock availability of individual TBH Technik components:

  • production of the entire pump is not awaited,
  • custom-made pump according to requirements,
  • Ensures delivery within 72 hours.

Result: dramatic reduction in machine downtime.

Practical application scenarios – hydraulic pumps for mobile machinery and industry

The CKD programme from TBH Technik is used in a wide range of applications – from agricultural machinery to demanding industrial equipment:

ApplicationProblemCKD AZPF solutionAdditionResult
Tractor / Combine harvesterHydraulics of the steering or working equipment during the seasonAZPF tandem, conus shaft C/H, SAE flangeUnder 72 hours.Return to operation during harvest
Industrial pressFailure of the pressing hydraulic circuitAZPF single-stage, FKM seal, 200 barUnder 48 hours.Zero production line downtime
Digger / Construction MachineArm or slew drive failureAZPF two-stage, splined shaft R/F, 250 barUnder 72 hours.Replacement without machine modification
Municipal vehicleMalfunctioning hydraulic circuit for tipping or cleaningAZPF single-stage, NBR, European flange BLess than 24 hours.Immediate service from stock
Municipal tractorFront loader or implement faultAZPF tandem or triple pump, PTO adapterUnder 72 hours.Full function without hydraulics change

AZPF gear pumps from the CKD TBH Technik programme – photo documentation

Every pump assembled under the CKD programme is marked with the TBH Technik production number and undergoes final inspection. The photographs below show a real AZPF pump assembled by TBH Technik – including the SAE flange, 1:5 taper shaft, and company plate with type designation.

Hydraulické zubové čerpadlo Bosch Rexroth v štyroch pohľadoch.
Fig. 3: Real Bosch Rexroth AZPF pump assembled within the TBH Technik CKD program – visible company plate with number VY12016020 (Source: TBH Technik)

Practical scenario: Tractor parked during harvest

Situation: Agricultural combine harvester taken out of service mid-season – breakdown of the hydraulic pump for the working attachment drive. The OEM manufacturer advises a 2-week delivery time for a replacement pump.

Impact A two-week shutdown during harvest time equals hundreds of thousands of euros in lost profit, a threat of non-compliance with contractual obligations.

TBH Technik Procedure:

  1. Analysis of original pump parameters: (flow rate, pressure, volume, flange, shaft type, rotation direction)
  2. Configure a modular AZPF variant of a tandem pump
    (16.0 + 11.2 cm³/rev, SAE flange C, H shaft, NBR seal)
  3. Assembly from AZPF stock components – no waiting for OEM
  4. Delivery of a fully functional and tested pump within 48 hours, directly to the customer’s premises

Result: Machine operational within 3 days of failure. Savings compared to OEM downtime: approx. €80,000 lost profit. Replacement carried out without any modifications to the combine harvester's hydraulic system.

Key advantages of the CKD programme from TBH Technik

Delivery within 72 hoursWe assemble the pump using components from stock and deliver it within 72 hours – without having to wait for OEM production cycles.
Configuration flexibilityThousands of combinations of shafts, flanges, seals and the number of stages – a pump tailored precisely to your application.
Cost savings (TCO)Eliminating downtime and OEM mark-ups reduces the total cost of ownership by up to 75%.
Reduction in downtime Ensures work continuity during the season/important contract.
Replacement of any brandSAE and DIN interface compatibility – we can swap pumps from different manufacturers without hydraulic modifications.
Technical SupportTBH Technik's hydraulic specialists will identify the original pump and design the optimal AZPF equivalent.
Bosch Rexroth Certified QualityAll AZPF pumps are original components from Bosch Rexroth – the global leader in hydraulics.

Conclusion: Why choose the CKD program and AZPF gear pumps from TBH Technik?

The CKD program from TBH Technik represents the answer to the most pressing problem for hydraulic equipment operators: a quick and reliable replacement hydraulic pump without weeks of waiting for the OEM.

Thanks to the combination of Bosch Rexroth AZPF standard components, a modular configuration system and TBH Technik's expert technical background, it is possible to assemble and deliver exactly the gear hydraulic pump you need – with various types of shafts, flanges and seals, and in any stage configuration – delivered within 72 hours anywhere in Slovakia.

TBH Technik is your partner for:

  • Fast replacement of a gear pump during an unplanned breakdown of a mobile machine or industrial equipment
  • Configure the AZPF modular hydraulic pump to meet your exact technical requirements
  • Replacement of hydraulic pumps from other manufacturers (Bosch Rexroth, Parker, Eaton, Casappa, Marzocchi and others) without modification of the hydraulics
  • Long-term partnership in the field of hydraulics for mobile machinery, tractors and industrial equipment

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