Rotation Bearing Outer Dirt Seal Replacement - NPK M20S Instruction Manual

SLEWING RING INSPECTION AND
MAINTENANCE

ROTATION BEARING OUTER DIRT SEAL REPLACEMENT

MODEL SLEWING RING
PART NUMBER
M20 25309550
M20 25309660
M28
25309270
M28
25309670
M38 25309680
1. Remove old seal (QQ) from the bottom side
(72) of the slewing ring (BT).
2. Thoroughly clean oil, grease and dirt from
the seal groove (118) and surrounding
areas.
3. Clean seal groove with brake clean/solvent
and allow time to dry completely.
4. Apply a small amount of high strength
adhesive into the groove and install one
end of the seal.
adhesive on the lower lip of the seal.
5. Insert seal into the groove and work around
the slewing ring applying a small amount of
adhesive every 12 in. (300 mm). Take care
not to stretch the seal as it is being
installed around the slewing ring.
6. Cut excess seal material as you get back
around to the other end so the seal will butt
against itself tightly. Apply adhesive to the
groove and end of the seal to make it one
continuous ring.
DIRT SEAL
PART NUMBER
25309273
25309353
Take care not to get
-
103
Additional items needed:
High strength adhesive
Brake clean/solvent
-