27
180R9263 / IOM APP 5.1-10.2 Appendices - v02 / 01.2013
Instruction
Recommended service intervals for APP pumps
2
180R9199 / 521B1135 / DKCFN.PI.013.C1.02 / 09.2012
Nr.
Qty.
Description
Material
Service interval
1
1
Housing, main bearing
Duplex, PEEK
No need for service
11, 125,
211*
1
Mounting flange/
end flange
Wetted part: Duplex
Dry part: AISI 316L
No wear part
121, 181*
1
Port flange
Duplex
No wear part
31
1
Swash plate
Super Duplex
40,000 hours
66
5/7/9
Piston
Super Duplex and PEEK
Recommended inspection
on a yearly basis and
evaluated acc. to app. 1
92
1
Valve plated
Super Duplex
24,000 hours
91
1
Port plate
Super Duplex, PEEK
24,000 hours
61
1
Cylinder barrel
Super Duplex
40,000 hours
65
1
Retaining plate
Super Duplex
24,000 hours
64
1
Retaining ball
Super Duplex
40,000 hours
71
1
Retaining guide
Super Duplex
40,000 hours
62
1/4
Spring
Duplex
40,000 hours
63
1
Spring guiede
Duplex or PP
40,000 hours
142
1
Stop for shaft seal
PP
No wear part
124, 215*
1
Shaft seal
Hasteloy and NBR
It is good practice to
change the seal after each
disassembly of the pump
125
1
Cover/flange for
shaft seal
Super Duplex
No wear part
93
5/7/9
Back-up ring
Teflon
24,000 hours
*
O-ring (overall)
NBR
24,000 hours
*
Screw (overall)
AISI 316
No wear part
*
Pin (overall)
AISI 316, Duplex or PEEK
No wear part
152
1
Valve cone (flushing valve)
Duplex or PEEK
40,000 hours
3, 129*
2
Bleeding screw
Duplex
No wear part
67
1
Parallel key
AISI 302
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.
Danfoss guarantees 8,000 hours service free
operation, however max. 18 months from date of
production. After 8,000 operation hours 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
2.
Design/features
3.
Appendix 1
Recommended service
intervals for APP pumps
(180R9199)
Table of Contents
* depends on pump size
Instruction
Recommended service intervals for APP pumps
3
180R9199 / 521B1135 / DKCFN.PI.013.C1.02 / 09.2012
3.
Appendix 1
Pistons:
The pistons are the heart of the pump regarding
service.
If the pistons break down, the pump will suffer a
breakdown.
In case of doubt - the pistons must be replaced.
The pictures below is ment as a guideline for
evaluating the wear of the sliding surface.
Cavitation of the piston shoes.
New inspection is required in 3,000-4,000 hours.
Cavitation of the piston shoes.
All pistons must be replaced within the next
500-1,000 hours.
Cavitation of the piston shoes.
All pistons must be replaced within the next
100-200 hours.
Cavitation of the piston shoes.
All pistons must be replaced immediately.
Abrasive wear of the piston shoes.
All pistons must be replaced immediately.
