Application: Electric vacuum pumps from HELLA are used to support or solely generate the vacuum for the pneumatic brake boosting system. Under certain driving conditions or depending on the engine design, insufficient or no vacuum can be provided to the brake booster via the intake manifold of an internal combustion engine. The UP 28 variant can support the system by generating an additional vacuum (support application) The UP 5.0 and UP 30 can provide the pneumatic vacuum supply alone (stand alone application). In this case, the pump acts as the sole source of vacuum and ensures sufficient supply for the brake booster and any auxiliary consumers. Structure and function: The operation of the vacuum pumps is based on the rotary vane compression principle. The pump contains a rotor that is eccentric to the pump chamber. The slides embedded in the rotor slide along the inner wall of the pump chamber. Rotation continuously compresses the volume enclosed by the slides. This change in cell volume causes a vacuum with the effect that air is drawn in from the brake booster via the pneumatic line system of the brake system by the vacuum pump.
UP 28 - with engine compartment connector
Applicable to all engine concepts, such as electric motors and hybrid drives
HELLA is the market leader and has more than 10 years of experience in the development and manufacture of electric vacuum pumps
Smaller pump with 600 h service life
Typical for support application
with damping
OE References: OE references: CHEVROLET 20 803 252; CHEVROLET 22 819 443; CHEVROLET 25 908 670; GENERAL MOTORS 20 803 252; GENERAL MOTORS 22 819 443; GENERAL MOTORS 25 908 670; VOLVO 31201707; VOLVO 31317445; VOLVO 31317530
Part Number: 8TG 009 428-081
UP 28 - with engine compartment connector
Applicable to all engine concepts, such as electric motors and hybrid drives
HELLA is the market leader and has more than 10 years of experience in the development and manufacture of electric vacuum pumps
Smaller pump with 600 h service life
Typical for support application
with damping
no Guarantee
Reference OEM Numbers
VOLVO : 31201707
VOLVO : 31317445
VOLVO : 31317530
GM : 20 803 252
GM : 22 819 443
GM : 25 908 670
CHEVROLET : 20 803 252
CHEVROLET : 22 819 443
CHEVROLET : 25 908 670Part Specifications
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