Tear down of an Abex AP09V Hydraulic Pump. This is a variable displacement swash plate pump with pressure controlled swash plate regulator.

Hydraulic pump (3/23/2015)

Abex AP09V Hydraulic Pump

Hydraulic pump (3/23/2015)

Abex AP09V Hydraulic Pump

Hydraulic pump (3/23/2015)

Abex AP09V Hydraulic Pump

Hydraulic pump (3/23/2015)

Rated at 2.85GPM at 1000psi at 4300RPM

Hydraulic pump (3/23/2015)

Model plate

Hydraulic pump (3/23/2015)

Suction and pressure ports

Hydraulic pump (3/23/2015)

Drive spline

Hydraulic pump (3/23/2015)

Shaft seal

Hydraulic pump (3/23/2015)

Shaft seal

Hydraulic pump (3/23/2015)

Shaft seal

Hydraulic pump (3/23/2015)

Shaft seal and o-ring

Hydraulic pump (3/23/2015)

Shaft seal o-ring groove

Hydraulic pump (3/23/2015)

Drive shaft and bearing

Hydraulic pump (3/23/2015)

Drive shaft and bearing

Hydraulic pump (3/23/2015)

Drive shaft sprig to compress rotating group onto valve plate

Hydraulic pump (3/23/2015)

Suction and pressure ports

Hydraulic pump (3/23/2015)

Rotating group and valve plate

Hydraulic pump (3/23/2015)

Valve plate back

Hydraulic pump (3/23/2015)

Pump cover

Hydraulic pump (3/23/2015)

Pump radial bearing surface

Hydraulic pump (3/23/2015)

Pump radial bearing surface

Hydraulic pump (3/23/2015)

Swashplate actuator and return spring

Hydraulic pump (3/23/2015)

Swashplate return spring

Hydraulic pump (3/23/2015)

Swashplate return spring

Hydraulic pump (3/23/2015)

Swashplate actuator piston

Hydraulic pump (3/23/2015)

Rotating group

Hydraulic pump (3/23/2015)

Rotating group cylinders

Hydraulic pump (3/23/2015)

Rotating group cylinders

Hydraulic pump (3/23/2015)

Rotating group cylinders

Hydraulic pump (3/23/2015)

Rotating group pistons

Hydraulic pump (3/23/2015)

Building spline adapter from 12 point AND20000 aircraft accessory drive to ABEX pump spline.

Material is 30% glass filled PEEK

Hydraulic pump (3/23/2015)

Spline is heated to glass transition temperature of PEEK and PEEK rod is pushed into spline, extruding the flutes in the spline.

Hydraulic pump (3/23/2015)

Facing off PEEK spline

Hydraulic pump (3/23/2015)

Center drilling

Hydraulic pump (3/23/2015)

Drilling through hole

Hydraulic pump (3/23/2015)

Milling 1/4" hole

Hydraulic pump (3/23/2015)

Countersinking edge of hole.

Hydraulic pump (3/23/2015)

Aluminum shield is used to cover face of PEEK spline and torch is used to heat inside surface.

10 sec on, 30 sec delay, 7 sec on, 15 sec delay, 10 sec on, 5 sec delay, then press fit

Hydraulic pump (3/23/2015)

Heated spline is press fit between centers extruding inner flutes. Alignment is accurate to 0.002" TIR

Hydraulic pump (3/23/2015)

Pump drive spline

Hydraulic pump (3/23/2015)

Pump drive spline with adapter.

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Copyright © 1998 - 2013 by Andrew Seltzman. All rights reserved.