86 | 180R9346 | AQ240486503020en-001702
© Danfoss | 2023.03
Operation guide
Installation, Operation and Maintenance APP 53-92 pumps
Pos.
Qty.
Description
Material
Service interval
APP 53 - 78
Service interval
APP 86 - 92
1
2
Housing, main bearing
Duplex, PEEK
No need for service
No need for service
11, 14
1
End flange/ motor flange
Duplex
No wear part
No wear part
121
1
Center flange
Duplex
No wear part
No wear part
31
2
Swash plate
Super Duplex
48,000 hours
40,000 hours
66
18
Piston
Super Duplex, PEEK and PP
Recommended inspection on
a yearly basis and evaluated
acc. to app. 1 Replace after
24,000 hours.
Recommended inspection on
a yearly basis and evaluated
acc. to app. 1 Replace after
8,000 hours
92
2
Valve plate
Super Duplex
32,000 hours
24,000 hours
91, 95
2
Port plate
Super Duplex, PEEK
32,000 hours
24,000
hours
61
2
Cylinder barrel
Super Duplex
48,000 hours
40,000 hours
65
2
Retainer plate
Super Duplex
48,000 hours
40,000 hours
64
2
Retainer ball
Super Duplex
48,000 hours
40,000 hours
82
2
Retainer guide assembly
Super Duplex, Duplex and
PP
48,000 hours
40,000 hours
81
9
Spring
Duplex
48,000 hours
40,000 hours
142
1
Stop for shaft seal
Duplex
No wear part
No wear part
124
1
Shaft seal
Hastelloy and NBR
24,000 hours
24,000
hours
125
1
Cover/flange for shaft seal
Super Duplex
No wear part
No wear part
93
8
Back-up ring
PTFE
24,000 hours
24,000 hours
*
O-ring (overall)
NBR
24,000 hours
24,000
hours
*
Screw (overall)
AISI 316
24,000 hours
24,000 hours
*
Pin (overall)
AISI 316, Duplex or PEEK
No wear part
No wear part
152
1
Valve cone (flushing valve)
Duplex or PEEK
48,000 hours
48,000 hours
3
6
Bleeding screw
Duplex
No wear part
No wear part
67
1
Key
AISI 316
40,000 hours
40,000 hours
1.
General information
This guideline provides information on the
recommended service intervals. The recommen-
dation is based upon good engineering practice
and on experience gained from operation even
under extreme conditions.
The recommendation is for guidance only.
2.
Design/features
Danfoss APP pumps are designed for long
operation and low maintenance and life cycle
costs.
Provided that the pump has been running
according to the Danfoss specifications, Danfoss
guarantees one year service-free operation,
however, max. 18 months from date of
production. After one year of operation it is
recommended to inspect the pump and replace
worn parts, if any.
If the Danfoss recommendations concerning
system-design (see our data sheet) are not
followed, the service life of the APP pumps might
be affected.
The recommended service intervals on the
different parts in the APP pumps appear from the
table below:
1.
General information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
2.
Design/features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
3.
Appendix 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87
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