8. Correct installation of lock collar bearings
The lock collar bearings are tightened by pushing the eccentric locking collar over the extended inner ring of
the bearing and rotating the locking collar in the direction of shaft rotation. This clamps the bearing to the shaft.
It is advisable to coat the inner ring and the shaft with semi-fluid lubricant NLGI grade 00 (e.g. Shell Retinax G
or its equivalent) before mounting the bearings. This will facilitate the subsequent removal of the bearings,
should this be necessary.
The locking collar is tightened by applying light hammer blows to a punch and tapping the collar in the
direction of shaft rotation until a moderate lock is obtained. Then tighten the set screw. Loosen the bearing by
tapping the eccentric collar in the opposite direction to the direction of shaft rotation.
9. Olive-type connectors on hydraulic lines
After all preassembly work and for olive-type fittings supplied ready assembled from the factory, final assembly
is performed in the corresponding, well-oiled female connector by tightening the union nut 1 /2 turn beyond the
point of the noticeable rise in effort required.
Preassembly:
a) Saw off the pipe at right angles. DO NOT use pipe cutters! Pipe cutters can cut the wall of the pipe at an
angle and severe burrs are formed on the inside and outside of the pipe. Lightly deburr the end of the pipe
on the inside and outside (but do not chamfer) and clean. For pipe elbows, the length of the straight pipe
end must be at least twice the thickness of the union nut before the start of the bending radius.
b) Push union nut and olive onto the pipe.
c) Push the pipe up to the stop into the female connector and tighten the union nut until the olive contacts the
pipe (the pipe must not turn with the nut!) This point is recognisable by the increase in effort required.
d) Tighten the union nut 1 /2 turn beyond the pressure point.
e) Check the opening in the cutting face: A noticeable collar must fill out the space in front of the face of the
olive. The olive may turn but must not move axially.
Final assembly:
Push the preassembled pipe into the well-oiled female connector and tighten the union nut until a noticeable
increase in effort is felt, then tighten by a further 1 /2 turn.
Subsequent reassembly:
Each time the olive-type connector is loosened, the union nut must be retightened without any great application
of force. Leaks at olive-type connector: If the pipe connection leaks, first loosen the union nut until a little oil
escapes from the connection, then tighten the union nut again as described above.
1 0.
Some advice for speedy and correct repair:
a) Mark machine parts before removal or disassembly to ensure that they are reinstalled on the correct side
and correctly balanced.
b) Fit roll (expansion) pins always with their gap pointing to the load side. If fitted with 1 /4 turn from this
position, they will come loose, fall out or shear off.
c) Always renew cotter pins, split pins, locking wires, locking plates, tab washers and lock washers during
repairs.
d) Fit lubricated ball and sleeve bearings coated with high quality grease.
e) Ensure that chain sprockets and V-belt pulleys are correctly aligned.
f) Always ensure the utmost cleanliness whenever working on the hydraulic system.
g) Do not mix different types and grades of oil.
h) After carrying out the repair, run or operate the machine or machine assemblies at low speed at first.
1 1 . Inform the machine owner of the cause of damage, the extent of consequential damage and the machine parts
involved.
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