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New repair and refurbishment facility reduces downtime

GROUP Companies Hytec South Africa and Hytec Engineering offer comprehensive hydraulic repair services for the Group’s entire hydraulics range.

These repairs are undertaken in a new world class facility situated in Kempton Park.

Repair services for hydraulic pumps, motors, gearboxes and valves falls within the scope of Hytec South Africa, while Hytec Engineering, as Group specialist in hydraulic cylinders, repairs and refurbishes all OEM cylinders distributed by Bosch Rexroth South Africa.

“Our hydraulic repair services are all ISO-accredited and cater to any application,” points out Ian Kidson, Repairs Manager, Hytec South Africa.

In addition to ISO compliance, Hytec South Africa and Hytec Engineering are Bosch Rexroth-Certified Service Centres of Competence. This certification, renewable every four years, certifies that these two Group companies have the processes, infrastructure, qualification and management abilities to perform service work to quality standards specified by the worldwide Bosch Rexroth Service Centre grades. These two companies, along with Group Company Tectra Automation, are the only Bosch Rexroth-Certified Service Centres of Competence in Africa.

Repair capabilities

All parts are inspected for wear and damage, with affected components replaced new and all seals, bearings and bolts are a mandatory replacement. The hydraulic equipment receives OEM replacement parts, manufactured by Bosch Rexroth Germany. Exchange units for all of these applications, barring hydraulic valves, are on-hand for qualifying customers – significantly decreasing their downtime caused by faulty equipment.

The gearbox repairs facility carries out repairs to all Bosch Rexroth gearboxes and other mobile shovel gearboxes like ZF, O&K, Stiebel, Siebenaar and Zollern brands.

Hytec Engineering retains an extensive and comprehensive stockholding of refurbished cylinders, which facilitates its cylinder exchange programme.

Hydraulic cylinder test benches

Hytec Engineering has three hydraulic cylinder test benches, ensuring its cylinder repair and refurbishment capacity and capabilities cater to the requirements of numerous cylinder types and sizes. The smallest of the three test benches is for high flow and low pressure testing, capable of 102 ℓ/min at a maximum pressure of 10 MPa, after which high pressure testing up to 55 MPa can achieved and end-of-stroke and mid-stroke testing occurs.

Comprehensive hydraulic pump and motor testing

Four pump and motor test stations, from 90 kW to 600 kW, are used on the pumps and motors. Each test station is connected to data recording stations, including CADASYS, a Bosch Rexroth data acquisition system, to which Bosch Rexroth South Africa has access. All results are saved to the Bosch Rexroth server for easy retrieval worldwide. Two valve test stations are used, one for standard valves and the other to test proportional and servo valves. The proportional and servo test station is also connected to a Bosch Rexroth data acquisition system where test reports are acquired and stored.

Developed and implemented by Group Company Hytec Services Africa (HSA), containerised hose workshops provide a comprehensive mine site hose and fittings service to Bosch Rexroth’s mining customers across Africa. Its focus goes beyond hydraulic hose and fittings, it acts as an onsite branch which helps facilitate onsite hydraulic repairs at mine sites too,” Kidson elaborates. Workshop services include the hydraulic cylinder service exchange programme and the supply of new pumps, filtration systems, drives, valves, piston motors and hydraulic maintenance tools, or providing services for them.

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