Danfoss APP series

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 ange/ motor ange Duplex No wear part No wear part
121 1 Center ange 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/ange 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 (ushing 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 specications, 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 aected.
The recommended service intervals on the
dierent 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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