Danfoss 51 Series Service Manual

Shaft seal replacement
Internal parts of the shaft seal
L50
L40
L35
L70
SAE and DIN flanged motors
Disassembly
1. Thoroughly clean all external surfaces before disassembly.
2. Remove the 8 screws (L70) retaining the flange to the motor housing using a:
•
8mm hex wrench for 60cm³ and 80cm³ motors.
•
10mm hex wrench for 110cm³ and 160cm³ motors.
•
12mm hex wrench for 250cm³ motors.
3. Remove the flange (L35) from the motor housing, using an appropriate puller.
4. Press out the shaft seal (L40) from the flange front side.
Inspection
1. Inspect the shaft seal cavity in the flange.
2. Inspect the sealing area on the shaft for wear.
Reassembly
1. Orient the new shaft seal (L40) with the cupped side facing towards the motor shaft bearings.
2. Press the shaft seal (L40) into the flange from the rear side. Press until the shaft seal bottoms out in
the cavity.
3. Remove the O-ring (L50).
4. Discard the O-ring after making certain that you have a correct replacement.
5. Lubricate with petroleum jelly and install new O-ring (L050) to the groove in the flange.
6. Install the flange (L35) to the housing, using a seal protection sleeve on the shaft.
7. Install the 8 socket head capscrews (L70).
Service Manual
Series 51 and 51-1 Motors
Minor repair
40 |
©
Danfoss | March 2016 11008567 | AX00000013en-US0202

Danfoss 51 Series Specifications

General

Brand	Danfoss
Model	51 Series
Category	Engine
Language	English