Starters

HEF/HEP 109 starters

Around the world, large-displacement engines are used for mining, decentralized supply of electric energy, construction machinery, agricultural vehicles as well as marine and railway vehicles. No matter whether displacements of up to 180 l, high thermal loads or applications with additional hydraulic loads, Bosch HEF/HEP 109 starters ensure reliable starting – both as single-starter solutions or parallel-starter systems.

Learn more about the HEF109

Technical data	HEF109-M 24 V	HEF109-MP 24 V	HEF109-L 24 V	HEP109-MP 24 V (2 x)	HEP109-L 24 V (2 x)	HEP109-MP 24 V (3 x)	HEP109-L 24 V (3 x)
Mechanical peak performance (At -20°C and SOC*=80 %)	7.62 kW	8.24 kW	10.0 kW	16.5 kW	20.0 kW	24.7 kW	30.0 kW
Typical scope of application: displacement up to (diesel)	... 16 l	... 24 l	... 30 l	... 48 l	... 60 l	... 72 l	... 90 l
Typical scope of application: displacement up to (gas / gasoline)	... 32 l	... 48 l	... 60 l	... 96 l	... 120 l	... 144 l	... 180 l
Max. battery cold testing current EN	1 300 CCA	1 500 CCA	2 000 CCA	3 000 CCA (2 x 1500 CCA parallel)	4 000 CCA (2 x 2 000 CCA parallel)	4 500 CCA (3 x 1 500 CCA parallel)	6 000 CCA (3 x 2 000 CCA parallel)
Starter weight	11.6 kg	<14 kg	<17 kg	2 x 16.5 kg	2 x 19.5 kg	3 x 16.5 kg	3 x 19.5 kg
Pole housing diameter	109 mm	109 mm	109 mm	109 mm	109 mm	109 mm	109 mm
Installation length (starter flange / commutator bearing cap)	287.5 mm	287.5 mm	319.5 mm	287.5 mm	319.5 mm	287.5 mm	319.5 mm
Typical control current	2 A	2 A	2 A	2 x 2 A	2 x 2 A	3 x 2 A	3 x 2 A

Starter range for several off-highway applications

Bosch HEF/HEP 109 starters are available in different versions meeting the specific requirements of different environmental conditions and off-highway applications. The modular starter concept allows free selection of the performance features and even their partial combination (please see technical data table) – ideal for individual alignment for different specific requirements.

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Product range & details

HEF 109 starter for high power requirements

With a nominal power output of up to 10 kW (24 V), HEF 109 starters are used to start diesel engines with a displacement of up to 30 l and under common cold start requirements. Their robust, compact and modular design makes them a great solution. The starter systems are designed for up to 14 000 hours of operation in stationary machines and other off-highway applications (approximately 800 000 km on highway). They are characterized by their high performance density and great cold start capability. On top of that, their weight is up to 50 % lighter compared to direct starters of the same performance class.

HEP 109 parallel-starter systems for large engines

Parallel starter systems (HEP 109), which consist of two or three synchronized HEP 109 starters, increase widely the scope of application. They are suitable for diesel engines with up to 90 l and gasoline engines with up to 180 l of displacement.

Rotatable ductile-iron flange for high flexibility

Eight possible mounting positions per part number
Increased flexibility and cost effectiveness with small and medium batch sizes

Protection class (IP57)

Additional protection of starters used for harsh off-highway applications
Protection in case of short-term submersion

Electrically insulated terminal 31

Improved corrosion protection
Ideal for marine applications and further special application requirements of construction vehicles and locomotives

Reversible thermal overload circuit breaker

Safe protection against overloads
Integrated into the starter harness

Integrated mechanical relay (IMR) with optional plug connector

Easy connection to the vehicle electrical system
No external control relay required
Controlled start via ECU is possible

Smooth engaging

Smooth electrical two-stage engaging
Increased service life of ring gear and starter pinion

Starter design in line with the specific application

Designed for high cold start performance, high starting torque and good start-up support
Different motor parts with a thermal behavior optimized for the specific application purpose

Noseless bearing principle

Optimized protection of the pinion shaft against dust, water and splash oil
High installation flexibility due to the pinionshaft bearing located inside the starter