User's Manual

Cylinder Head comparison
Bendix Cylinder Head/Cooling & Valve Plate
Bendix head/plate
combination provides a
highly turbulent, highly
effective three tier heat
exchange design to
minimize discharge air
temperatures.
2 Discharge
valve/retainers
Steel valve plate
Less oil passage means cleaner air lines, and less downtime for service.
That adds up to a more efcient eet, and a stronger bottom line.
Compared to a leading competitor, the Bendix
®
BA-921
®
and BA-922
®
Compressors deliver more air at lower discharge temperatures,
and – thanks to their optimized piston/ring design – there is less oil passage. So there’s less carbon build-up in the compressor, and less
contamination, which extends the life of the whole air charging system.
The Bendix
®
Compressor Air Power Series
Piston comparison
Our larger, more robust piston design for better seal and wear
resistance. Extra ring means less oil passing, better compression.
Wider journal width and bearing surfaces for better load
distribution and wear resistance. Our crankshaft offers
signicantly more load-carrying capability.
Crankshaft
Unloader Mechanism
Bendix unloader mechanism is serviceable.
Competitor design does not
reduce discharge air temperature
as effectively.
Competitor Cylinder Head with Integrated Cooling Valve Plate
Cooling ns
Discharge valve/retainer
Competitor
- 85mm diameter
- No top compression ring
to help reduce oil passing
Competitor
- Oil holes at top and bottom
dead center
- Smaller journal width
- Larger counterbalance
Bendix BA-921
- Larger journal width front
and rear
- Oil holes 90 degrees from top
and bottom dead center
Serviceable ESS piston
Competitor
- Bottom of cooling/valve plate assembly
- Non-serviceable unloader leaf slider, plus more susceptible
to carbon build-up
Bendix
Serviceable ESS piston cover
on cylinder head
ANATOMY OF A LEGEND
Bendix BA-921
- 92mm diameter
- Full geometry
- Top compression ring for oil
passing control
Bendix valve plate cooling close to cylinder, and hottest air,
to maximize heat reduction effectiveness.
Coolant path