1. Lubrication of container crane`s rolling elements consider one of the most important issue of the
crane preventive maintenance program.
Bearing and housing details: bearing type
Background: the crane contents of spherical roller bearing, bearing number
mechanical mechanism responsible of 22226 C/W33, bearing dimension is
moving trolley frame. 130x230x64. Bearing housing as shown in
This mechanism is A.C motor, reducer, wire Fig.03
rope drum, and drum pedestal
bearing.Fig.01
1
4
3
Fig.03
2 Bearing and bearing housing drawing
Fig.01 Checking and finding: after dismantle the
1. Motor 2.Reducer 3.Drum top cover of the housing, we found the
4. Drum pedestal bearing bearing without outer groove and also
without greasing holes.
Problem: drum pedestal bearing not accept The bearing number 22226 C/W33, and
grease, the bearing should be lubricate W33 it mean that; the bearing with a
from top of its housing.Fig02 lubrication groove and “3” lubrication holes
at the outer ring, but this is not the existing
condition.Fig.04
Fig.02 Fig.04
Drum pedestal bearing, greasing nipple location Bearing without lubrication groove and without
lubrication holes at outer ring
M. Elnagdy

2. Action and corrective action: Dismantle of Assembly housing and re-lubrication:
old bearing, Fig.05, and install new bearing Assemblies the housing cover and lubricates
With lubrication groove and lubrication the bearing. Fig07
holes at outer ring, Fig.06.
New bearing 22226 E.
Grease
Fig.05 Fig.07
Dismantle of old bearing Lubricate new bearing
Fig.06
Install new bearing, SKF 22226 E.
M. Elnagdy

3. Conclusions:
Preliminary detect of bearing
greasing problem.
Keeping open line and contact
between greasing technicians and
their supervisors.
Prevent failures of bearing before
happened.
Awareness sessions for
maintenance technicians about the
relation between bearing housing
and bearing type.
Machinery erection technicians also
should be understood the behavior
and path of bearing lubrication to
early detect any problems during
erection stage.
Preliminary mechanical designers
should be aware by this example.
M. Elnagdy