6 Maintenance
The sleeve must always protrude to ensure expansion. The washer (or fastener, for
variants without washers) must never come into contact with the end of the shaft body
or attachment lug. Should this occur, go to section 6.3.2.2. Removal and follow the
instructions under step 2. If the washer on either side comes into contact with the
attachment point lug or the end of the shaft body, the sleeve is the wrong size. The
expander pins must then be fitted with oversize sleeves.
4. Grease the joint with 3-5% molybdenum sulphide grease before putting the machine
into operation. Regular greasing extends the service life of the expander pins.
5. Start the base machine and move the joint back and forth. Retighten to the
recommended torque. This process makes sure the sleeves bed in.
6.4. Lubricate every 16 operating hours
engcon recommends greasing at 16 hour intervals. See chapter 6.4.2. Lubrication, stone
and sorting grab.
When working in water, the lubrication interval is reduced to 8 hours.
If your product is equipped with a rotator, there are instructions for the
rotator section in the tiltrotator user manual.
6.4.1. Grease recommendation
The tiltrotator’s worm gear is factory filled with the recommended lithium-based universal
grease (NLGI 2). This grease is often miscible with other greases of similar type.
Always check with your dealer to ensure miscibility. The use of inferior grease categories
will lead to increased consumption.
6.4.2. Lubrication, stone and sorting grab
The arrows show the location of the grease nipples.
Grease quantity: 3-4 pump strokes per nipple.
6.5. Tightening torque
Bolts and threaded holes must be thoroughly clean and the threads oiled.
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