SEW-Eurodrive DR 315 Series, Operating Instructions Manual

Page: 143 / 268

7
Inspection/maintenance
Inspection/maintenance work for DR..71 – 315, DRN63 – 315, DR2..56 – 80 motors
Operating Instructions – AC Motors
143
7. If there is moisture inside the stator:
• With gearmotors: Remove the motor from the gear unit.
• With motors without a gear unit: Remove the A-flange.
• Remove the rotor [1].
8. Clean the winding, dry it and check it electrically, see chapter "Drying the mo-
tor" (→
2
34).
9. Replace the rolling bearing [11], [44] with permitted rolling bearing types, see
chapter "Permitted rolling bearings" (→ 2 210).
10. DR..250 – 280, DRN225 – 280 motors with option /ERF or /NS, or for DR../
DRN315
• Fill the rolling bearing with grease until it is two thirds full, see chapter "Bearing
lubrication" (→
2 121)
• Notice: Place the oil seal flange [608] and [21] onto the rotor shaft before in-
stalling the bearings.
• Starting on the A-side, mount the motor vertically.
• Place the springs [105] and lubrication ring [604] into the bearing bore of the
flange [7].
• Hang the rotor [1] onto the B-side thread, and guide it into the flange [7].
• Fasten the oil seal flange [608] to the flange [7] using the hex head screws
[609].
11. Reseal the shaft:
• A-side: Replace the oil seal [106].
• B-side: Replace the oil seal [30].
Coat the sealing lip with grease (Klüber Petamo GHY 133).
12. Reseal the stator seat:
• Seal the sealing surface with duroplastic sealing compound (operating temper-
ature -40 to +180 °C), such as "SEW L Spezial".
• DR..71 – 132, DRN71 – 132S, DR2..71 – 80 motors : Replace seal [392].
• DR..71 – 132, DRN63 – 132S, DR2..56 – 80 motors : Change O-ring [1480] if it
is deformed or damaged. As an alternative, use e.g. "SEW L Spezial" instead of
the O-ring.
• DRN63, DR2..56 – 63 motors: Replace the O-ring [392] if it is deformed or
damaged. As an alternative, use a duroplastic sealing compound, e.g. "SEW L
Spezial" instead of the O-ring.
13. Install the motor and options.
25851535/EN – 02/2019