DDC20/24 shaft removal
1. Using a retaining ring pliers, remove retaining ring (F115).
2. Pull the shaft (F100), with bearing (F105), out of the pump. If necessary, tap lightly on the shaft to
dislodge it from the internal pump components.
C
Caution
Moving the pump with the shaft removed may dislodge the rotating group making reassembly
impossible without removing the endcap.
3. If replacing the bearing (F105), remove retaining ring (F110) using a retaining ring pliers.
4. Press on the inner race to remove the bearing (F105) from the shaft.
DDC20/24 shaft inspection
1. Ensure the shaft and its splines are straight and free of damage or heavy wear.
2. Inspect the shaft surface where it meets the shaft seal.
3. Replace the shaft if a groove exists at the sealing land surface that may let dirt into or hydraulic fluid
out of the unit.
4. Clean the sealing area with a nonabrasive material if necessary.
5. Lubricate the shaft with a light coat of hydraulic fluid before assembly.
DDC20/24 shaft bearing inspection
1. Clean bearing with a solvent and lubricate with hydraulic fluid.
Replace the bearing if issues persist after cleaning.
2. Rotate the bearing in hand. The bearing should rotate smoothly.
3. Inspect for wear, or pitting.
If excessive wear is found, replace the bearing.
DDC20/24 shaft and seal assembly
1. Position the pump with the shaft end pointing up.
If previously removed; press bearing onto shaft by applying force to the inner race.
2. Lubricate and install bearing (F105) with hydraulic fluid.
3. Install retaining ring (F110) using retaining ring pliers.
4. Install shaft (F100) with bearing (F105) into housing. Ensure the shaft splines engage the block splines
and the shaft end slides smoothly into the rear bearing. It may be necessary to tap lightly on the shaft
to seat the bearing.
Service Manual
DDC20/24 Axial Piston Pumps
Minor repair
©
Danfoss | August 2019
L1120413 | AX00000135en-000401 | 19
