28
DKMH.PS.315.B1.02 520L0535
Series 20 – Axial Piston Pumps
Service Manual and Repair Instructions
Before reassembling the cylinder block
assembly, the thrust plate must be
withdrawn from the swash plate, and be
tested to ensure that it has a perfect
surface. If there is any damage to the sur-
face, the plate must be replaced. When
the thrust plate is replaced, care must be
taken that the side with the chamfer is
placed next to the swash plate.
The pump should then be moved from
the horizontal to a vertical position. The
spring guide can now be pushed over
the shaft.
Changing the cylinder block kit (assembly)
Disassembly and Assembly
MAJOR REPAIRS
(continued)
The cylinder block assembly should be
installed next. It is necessary to check
alignment of the ball guide and cylinder
block splines. The undersized tooth in the
spline of the cylinder block must line
up with the missing tooth in the ball
guide spline. These in turn line up with a
missing tooth on the shaft spline.
Lubricate the thrust plate, slippers, pis-
tons, and bores with clean oil. Slide the
cylinder block assembly onto the shaft
and against the thrust plate.
Before tting the tapered bearing, the
shaft must be supported underneath so
that the spring guide is not compressed
by the bearing. A spacer is required to
protect the slot in the end of the end of
the pump shaft from the puller screw.
F000 107
F000 106
49
29
F000 108
13
20 Cone bearing
see page 18
13
Bearing puller Cone bearing
F000 068
Series 20 Axial Piston Pumps_SR.indd 24.4.2002, 14:0428-29
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