Minor Repair; Shaft Seal Replacement; Disassembly; Inspection - Danfoss 45 Frame K2 Series Service Manual

Service Manual
Series 45 Frame K2 Open Circuit Axial Piston Pumps

Minor repair

Shaft seal replacement

26 | © Danfoss | April 2017

Disassembly

A lip type shaft seal is used in the Series 45 open circuit variable pumps. This seal can be replaced without
major disassembly of the unit. Replacement of the shaft seal requires removal of the pump from the
machine.
1. Using the appropriate snap-ring pliers, remove the retaining ring (K010) from the housing.
2. Remove the shaft seal (K020) from the bore in the pump housing and discard. Avoid damaging the
pump housing or shaft.
Puncture the face of the seal with a packing hook, or use a slide-hammer type puller to remove the
seal.

Inspection

Inspect the pump housing and new seal for damage. Inspect the sealing area on the shaft for rust,
wear, or contamination. Polish the sealing area on the shaft if necessary.

Reassembly

1. Lubricate the lip of the new shaft seal with clean hydraulic fluid. Place a protective sleeve over the
shaft end to prevent damage to the seal during installation.
C
CAUTION
Premature bearing failure can result if the shaft seal contacts the shaft bearing.
Press the seal into the housing only far enough to clear the retaining ring groove.
2. Keeping the seal perpindicular to the shaft, press the new seal into the housing just far enough to
clear the retaining ring groove. Install seal with the cupped side toward the shaft bearing. Do not
damage the seal during installation.
3. Using the appropriate snap ring pliers, install the seal retaining ring.
4. Remove the installation sleeve
Shaft seal and retaining ring
K010
K020
P109052
AX00000301en-US0101