Danfoss PAH 70 Service-Handbuch - Seite 7

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Danfoss PAH 70 Service-Handbuch
Service guide | Disassembling and assembling PAH 50-100
2.

Inspection

2.1. Port plate and thrust plate

1. Neither port plate nor thrust plate must
show any sign of wear.
3. Check that both O-rings and back-up rings
are not broken and do not show severe
wear.

2.2. Pistons

1. The play in the ball and socket joint must
not exceed 0.1 mm.
2. The thickness of the piston shoes must be
at least 4.3 mm.
180R9098 | 521B1072 | DKCFN.PI.011.NC5.02 | 06.2017
2. Hold a ruler against the surface of the
plates and check the tightness against a
light source.
3. Hold a ruler against the surfaces of the
piston shoes to check that the surfaces
are even and smooth and without any
scratches.
4. It is acceptable that the (black) treated
surfaces of the pistons are partly worn.
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