Danfoss APP 11-13 User manual

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Instruction
Disassembling and assembling
APP 11-13 and APP 16-22
MAKING MODERN LIVING POSSIBLE

Instruction Disassembling and assembling APP 11-13 and APP 16-22
2180R9228 / 521B1181 / DKCFN.PI.013.A2.02 / 10.2013
This document covers the instructions for
disassembling and assembling the axial piston
pumps APP 11-13 and APP 16-22.
Tools provided with toolset 180B4222:
• 10 mm combination wrench
• 13 mm combination wrench
• 6 mm allen key
• Adjustable pin wrench
• Press bush for valve plate
• Extractor
• M8x20 mm allen screw
• Press bush (plastic)
• M8 eye bolt
• M8 mm nut
• M8x70 mm screw
1. Disassembling ..........................................................................3
2. Disassembling the pump ................................................................3
3. Assembling the pump...................................................................7
4. Disassembling and assembling of the swash plate ......................................12
5. Disassembling and assembling of cylinder barrel/valve plate ...........................13
6. Disassembling and assembling of the ush valve .......................................14
7. APP 11-13, Exploded view ..............................................................15
8. APP 16-19, Exploded view ..............................................................16
9. APP 22, Exploded view .................................................................17
Table of Contents

Instruction Disassembling and assembling APP 11-13 and APP 16-22
3
180R9228 / 521B1181 / DKCFN.PI.013.A2.02 / 10.2013
1. Disassembling Important: It is essential that the pump is
serviced in conditions of absolute cleanliness.
Place the pump on a pallet or other stable
surface above the ground. Ensure that the pump
cannot roll. It must be possible to place the
pump vertically with the shaft pointing down-
wards. This can be done between two pallets or
between two boards on a pallet provided that
the distance to the ground is minimum 100 mm.
(3,94 inches). See example page 4 item 7.
For a better understanding of the pump, please
see exploded views on page 15 to 17.
WARNING:
Do not reuse disassembled O-rings or shaft
seal as they might be damaged. Always use
new O-rings.
2. Disassembling the
pump
1. Disconnect the pump from the rest of the
system.
2. Using the 10 mm combination wrench,
unscrew the four bolts from shaft seal
ange. If shaft seal ange is stuck, place
two bolts in threaded holes in shaft seal
ange to remove it.
3. Remove ceramic ring from ange by
carefully pushing it from the back of the
sealing ring.

Instruction Disassembling and assembling APP 11-13 and APP 16-22
4180R9228 / 521B1181 / DKCFN.PI.013.A2.02 / 10.2013
4. Mount the M8 allen screw from the tool set
in the top of the shaft.
5. Wet the shaft and shaft seal with clean
(ltered) water.
6. Carefully remove the shaft seal using the
shaft seal extractor supplied in the toolset.
The extractor must t underneath the shaft
seal. Press the arms of the extractor
together when turning the bolt.
7. Turn pump into vertical position with shaft
pointing downwards. Ensure minimum
100 mm (3,94 inch) free space for the shaft.

Instruction Disassembling and assembling APP 11-13 and APP 16-22
5
180R9228 / 521B1181 / DKCFN.PI.013.A2.02 / 10.2013
8. Using the 13 mm combination wrench,
remove all the bolts on the mounting
ange except the three shown in the
picture in item 9.
WARNING: Do not loosen the two screws
keeping the swash plate in place.
9. Unscrew the remaining three bolts. Turn
each bolt one round at the time to make
sure that the ange is removed as straight
upward as possible.
10. Screw the eye bolt in the M8 hole in the
middle of the ange. Pull it straight
upwards.
11. Swash plate must be placed so that its
surface is not scratched. For further dis-
assembling of swash plate, see page 12.
12. Remove the pistons one by one. Be careful
not to scratch pistons. Tilt the retainer plate
to horizontal for easy removal of pistons, if
required.
WARNING: DO NOT USE ANY TOOLS.
13. Remove the retainer plate.
Note: As the retainer guide is not
attached to the retainer plate, it might fall
out.

Instruction Disassembling and assembling APP 11-13 and APP 16-22
6180R9228 / 521B1181 / DKCFN.PI.013.A2.02 / 10.2013
14. Remove the retainer guide, the spring
guide, the 7 springs and the 3 pins.
15. Mount the M8 eye bolt in the cylinder
barrel. Pull straight upwards. A continuous
lift will elevate cylinder barrel out of
housing. This can only be done if shaft seal
is removed.
WARNING: If the cylinder barrel is
dropped into housing, the shaft bearing
in the port ange might be damaged.
Replacement of the shaft bearing in the
port ange can then only be done at
Danfoss DK-Nordborg.
16. Place cylinder barrel horizontal to ensure it
can not roll. For further disassembling of
cylinder barrel and valve plate see page 13.
17. Remove the port plate. 18. Remove the two guide pins.
19. Place the pump horizontally.

Instruction Disassembling and assembling APP 11-13 and APP 16-22
7
180R9228 / 521B1181 / DKCFN.PI.013.A2.02 / 10.2013
3. Assembling the pump
20. Remove the remaining screws in port
ange using the 13 mm combination
wrench.
21. Carefully separate house and port ange.
Ensure that the guide pin for the position-
ing of the house is not lost. For further
disassembling of ush valve, see page 14.
Important:
It is essential that the pump is serviced in
conditions of absolute cleanliness. All parts
must be absolute clean before mounting.
Note: Place the pump on a pallet or other
stable surface above the ground. Ensure that
the pump cannot roll. It must be possible to
place the pump vertically with the shaft
pointing downwards. This can be done
between two pallets or between two boards on
a pallet provided that the distance is minimum
100 mm (3,94 inch) – see photo page 4 para-
grap h 7.
WARNING:
Do not use silicone when assembling the
pump.
Do not reuse disassembled O-rings as they
might be damaged. Always use new O-rings.
Do not reuse the shaft seal, due to risk of
leakage.
1. Lubrication
• To prevent seizing-up, lubricate threads on
screws.
• O-rings inside pump must be lubricated
only with clean ltered water.
• O-rings for port ange, end ange and
black O-ring on ushing valve must be
lubricated.
• It is important to lubricate ALL parts before
and during assembling with clean ltered
water. (Especially all PEEK parts)
2. Place port ange as illustrated.
3. Insert guide pin for positioning housing on
port ange. Ensure that two screw holes
can be reached from below.

Instruction Disassembling and assembling APP 11-13 and APP 16-22
8180R9228 / 521B1181 / DKCFN.PI.013.A2.02 / 10.2013
4. Mount the O-ring. Remember lubrication of
the O-ring with clean ltered water.
5. Position housing by aligning pin hole over
guide pin.
6. Gently press downwards. Be careful not to
squeeze the O-ring. If O-ring is damaged
the pump will leak.
7. Screw in at least two screws from below. 8. Place housing horizontally. Cross screw the
rest of the screws in on port ange. Tighten
screws to a torque of 30 ± 2 Nm.
9. Place pump vertically. Place 10.5 mm guide
pins in port ange.
11. Ensure the port plate is tted tightly
against the bottom.
Important:
Lubricate port plate with clean ltered water.
If valve plate is disassembled from cylinder barrel
please see page 13 before continuing.
10. Position port plate using the two guide
pins. Do not use force for this operation.
12. Screw in M8 eye bolt in the cylinder barrel.

Instruction Disassembling and assembling APP 11-13 and APP 16-22
9
180R9228 / 521B1181 / DKCFN.PI.013.A2.02 / 10.2013
14. Unscrew M8 eye bolt.
13. Make sure there is enough free space for
shaft beneath the housing. Minimum 100
mm (3,94 inch). Carefully lower cylinder
barrel into housing.
WARNING:
If cylinder barrel is dropped or lowered
too fast into housing, the shaft bearing
might be damaged.
Replacement of the shaft bearing can then
only be done at Danfoss DK- Nordborg.
15. Place the 7 springs and 3 pins in cylinder
barrel. The pin holes are assymetric.
16. Place the spring guide and the retainer
guide on the cylinder shaft.
17. Place retainer plate in cylinder barrel.
(Remember to lubricate the retainer plate
and cylinder bushings with clean ltered
water).
18. Ensure that retainer plate is oriented
correctly, with its slant surfaces pointing
downwards.

Instruction Disassembling and assembling APP 11-13 and APP 16-22
10 180R9228 / 521B1181 / DKCFN.PI.013.A2.02 / 10.2013
19. Place pistons in retainer plate and cylinder
barrel. When pistons are placed, tilt retainer
plate for easier placement of swash plate.
If swash plate has been disassembled from
mounting ange, see page 12 for assembly of
swash plate.
20. Place the guide pin in the housing.
21. Lubricate piston shoes and swash plate
with clean ltered water.
22. Mount assembled swash plate, using the
guide pin.
23. Place three bolts in mounting ange.
(Remember lubrication as stated in
paragraph 1 page 7.)
Turn each bolt one round at a time to
ensure mounting ange is mounted as
straight downwards as possible.
Be careful not to squeeze the O-ring.
24. Screw in the rest of the bolts and tighten all
screws to a torque of 30 +/- 2 Nm.
25. Place pump horizontally to get access to
shaft.
26. Lubricate shaft with clean ltered water.

Instruction Disassembling and assembling APP 11-13 and APP 16-22
11
180R9228 / 521B1181 / DKCFN.PI.013.A2.02 / 10.2013
27. Place stop for shaft seal and new shaft seal
on shaft.
WARNING: Ensure that carbon ring is
pointing outwards. Do not reuse the shaft
seal, due to risk of leakage.
28. Use plastic press bush assembly tool
provided with large diameter pointing
towards seal, to press seal against shoulder of
stop for shaft seal.
29. Press new ceramic ring into shaft seal
ange, using plastic tool provided.
WARNING:
Ensure that the face with rubber seal is
positioned against shoulder in shaft seal
ange. Ensure that ceramic ring is
pointing outwards.
30. Remove old O-ring and t new one on shaft
seal ange.
31. Place shaft seal ange on shaft. 32. Tighten the bolts with a torque of 10 Nm
+/-2 Nm.

Instruction Disassembling and assembling APP 11-13 and APP 16-22
12 180R9228 / 521B1181 / DKCFN.PI.013.A2.02 / 10.2013
4. Disassembling and
assembling of the
swash plate
WARNING:
Make sure that the surface on the swash plate
does not get any marks.
1. Place the swash plate upside down.
Remove the 2 bolts holding the swash
plate.
Remove the mounting ange from the
swash plate.
2. Change the O-rings and guide pins.
(Provided with sealing set).
O-rings Guide pins
3. Change the O-ring on the mounting ange. 4. Mount the swash plate on the 2 guide pins.
Carefully by hand tilt the unit horizontally
and mount the 2 bolts which hold the
swash plate. Tighten the bolts with a
torque of 30 Nm +/-2 Nm.
Finally check the surface on the swash plate
for any marks or foreign particles.
5. Mount the assembled part on the pump.
(Remember to lubricate the O-ring).

Instruction Disassembling and assembling APP 11-13 and APP 16-22
13
180R9228 / 521B1181 / DKCFN.PI.013.A2.02 / 10.2013
5. Disassembling and
assembling of cylinder
barrel/valve plate
1. Push a screwdriver into the hole between
the cylinder barrel and valve plate. Care-
fully push downward the screwdriver so
that it makes a gap between cylinder barrel
and valve plate. Use this gap to put in
another screwdriver and loosen the valve
plate from the cylinder barrel.
2. Remove the O-rings and backup rings. If
they have been removed they can not be
reused.
Mount the new back-up rings on the valve
plate rst and then mount the new O-rings.
Mount back-up
rings rst.
Mount the
the O-rings.
3. Lubricate the new O-rings/back-up rings
and the liners in the cylinder barrel with
clean ltered water. Lower the valve plate
upside down on the cylinder barrel.
Place the press bush for valve plate
(provided in tool set) like on the picture.
Screw the bolt into the shaft in the cylinder
barrel and turn the nut slowly clockwise.
The valve plate must slide gently into the
cylinder barrel.
Stop when the gap between cylinder barrel
and valveplate is 1-2 mm.
4. Remove the press bush again by screwing
the nut counter clockwise.
Mount the cylinder barrel into the pump.

Instruction Disassembling and assembling APP 11-13 and APP 16-22
14 180R9228 / 521B1181 / DKCFN.PI.013.A2.02 / 10.2013 14
3. Put a small amount of lubrication on the
thread on the plug. Screw it into the port
ange. Tighten with a torque of 30 Nm +/-
3 Nm.
2. Remove the o-rings (green and black).
If necessary change the valve cone, spring
and plug.
It is important that if the spring is changed
it is located like on the picture.
Carefully use a screwdriver. The end of the
spring must be against the shoulder of the
valve cone.
1. Unscrew the ushing valve counter
clockwise by using the pin wrench.
6. Disassembling and
assembling of the
ush valve

Instruction Disassembling and assembling APP 11-13 and APP 16-22
15
180R9228 / 521B1181 / DKCFN.PI.013.A2.02 / 10.2013 15
7. APP 11-13,
Exploded view
[22.13 lbf ft ± 2.21 lbf ft]
[22.13 lbf ft ± 2.21 lbf ft]
[1.47 lbf ft ± 0.74 lbf ft]
[1.47 lbf ft ± 0.74 lbf ft]
[1.47 lbf ft ± 0.74 lbf ft]
[7.38 lbf ft ± 1.47 lbf ft] [22.13 lbf ft ± 2.21 lbf ft]
[7.38 lbf ft ± 1.47 lbf ft]
[7.38 lbf ft ± 1.47 lbf ft]
[22.13 lbf ft ± 2.21
lbf ft]

Instruction Disassembling and assembling APP 11-13 and APP 16-22
16 180R9228 / 521B1181 / DKCFN.PI.013.A2.02 / 10.2013
8. APP 16-19,
Exploded view
[22.13 lbf ft ± 2.21 lbf ft]
[22.13 lbf ft ± 2.21 lbf ft]
[22.13 lbf ft ± 2.21 lbf ft]
[22.13 lbf ft ± 2.21 lbf ft]
[1.47 lbf ft ± 0.74 lbf ft]
[1.47 lbf ft ± 0.74 lbf ft]
[1.47 lbf ft ± 0.74 lbf ft]
[7.38 lbf ft ± 1.47 lbf ft]
[7.38 lbf ft ± 1.47 lbf ft]
[7.38 lbf ft ± 1.47 lbf ft]

Instruction Disassembling and assembling APP 11-13 and APP 16-22
17
180R9228 / 521B1181 / DKCFN.PI.013.A2.02 / 10.2013
9. APP 22,
Exploded view
[22.13 lbf ft ± 2.21 lbf ft]
[22.13 lbf ft ± 2.21 lbf ft]
[22.13 lbf ft ± 2.21 lbf ft]
[22.13 lbf ft ± 2.21 lbf ft]
[1.47 lbf ft ± 0.74 lbf ft]
[1.47 lbf ft ± 0.74 lbf ft]
[7.38 lbf ft ± 1.47 lbf ft]
[7.38 lbf ft ± 1.47 lbf ft]
[7.38 lbf ft ± 1.47 lbf ft]
[1.47 lbf ft ± 0.74 lbf ft]

Instruction Disassembling and assembling APP 11-13 and APP 16-22
18 180R9228 / 521B1181 / DKCFN.PI.013.A2.02 / 10.2013
Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice.
This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in specications already agreed.
All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
Danfoss A/S
High Pressure Pumps
DK-6430 Nordborg
Denmark