Hyd-Mech S-20DS, Руководство по эксплуатации и обслуживанию, Страница: 95 / 138

7--3 87 Adjustments
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using a manual pump, loaded with MOBIL DTE 11 oil (or equivalent --- see
table in Chapter 8), top up until the upper rod groove exits, as illustrated
above.
Bleeding the head cylinder
Accumulations of air inside the hydraulic circuit cause the head to stutter in down
phase. When this happens, bleed the circuit as follows:
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position the head at FCTI;
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using a 10 mm open wrench, slacken the bleed valve until oil exits;
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close the valve and perform a number of empty work cycles; if necessary, top
up the compensation tank.
The oil which spills out during the above operation can be collected using a
pipe inserted on the valve, and re--used.
N.B.