20
15.0 TECHNICAL INFORMATION
Generally speaking, the Verti-Drain
®
is not a complicated machine. A number of technical
items will be explained. If you have additional questions, contact your dealer who will be
happy to provide assistance.
2
4
3
5
6
1
7 8
9 10 11
Fig. 15
15.1 THE CRANKSHAFT
The crankshaft assembly is shown in figure 16. A more detailed drawing can be found on
the parts page.
For a 7120 the angle between the crank cheeks in the gearbox must be 32 degrees.
15.1.1 REPLACEMENT OF A CRANK THROW / CRANK
BEARING
Replacement of a crankshaft throw is necessary when it is cracked or when the nuts
regularly come loose from the big-end. That is, if the throw bearings, the throw-bearing
fittings, or the big-end pin holes in the throw are damaged. Replace the throw / the bearing
as soon as possible, to prevent additional damage to other parts, as follows (see fig. 15):
1. Remove the Big-End nuts 2 and 4 and Big-End 5.
2. Remove the nuts 3 and crank elements 6.
3. Remove profile shaft 7 with bearing 8.
4. Remove bearing 8 from profile shaft 7.
5. Replace the defective parts and assemble in the reverse order.
@ Use Loctite for nuts 2, 3 and 4.
