CAUTION - Filling the Hydraulic Oil Reservoir
Make sure hydraulic oil i is at a normal safe operating level. DO NOT over fill. Over filling (excessive oil) will cause excess oil to blow out of breather plug.
Replacing Hydraulic Oil
1.Remove the hydraulic hoses (left and right) which enters the cylinder of the vibrator from the hydraulic pump (Figure 28) and move the travel lever back and forth to drain the hydraulic oil from the pump.
Figure 28. Hydraulic Oil Maintenance
2.After draining, reinstall the hydraulic hoses and lock the travel lever to the
3.Remove the bleed valve assembly within the pump using a 17 mm box wrench.
CAUTION - Removing the Bleed Valve
When removing the bleed valve, NEVERloosen the M8 nut on its end. A copper packing is used underneath the bleed valve, thereforecareshouldbetakennottodropitintothepump.Make sure to remove it together with the bleed valve. DO NOT allow dust or trash to enter the hand pump.
3.Remove bleed plug at the cylinder of the vibrator (right belt cover side, forward travel circuit) (Figure 29). After a while, oil will flow out of the bleed plug. When aeration disappears, reinstall the plug, tightening it securely.
MVH-200GH — MAINTENANCE
4.Filling the forward travel circuit with oil.
a.With the rope removed from the travel lever, move the lever slowly up and down while adding oil into the hand pump. Use Shell Tellus Oil #46 or equivalent.
Figure 29. Hydraulic System
b.Moving it about 10 times causes the forward resistance to increase. When the resistance has considerably increased, with the travel lever remaining on the reverse side, install the bleed valve assembly loosely inside the pump to prevent oil splash.
c.Push the travel lever forward all the way.The valve inside the spool will activate to push out the aerated oil reverse circuit.
d.With the bleed valve assembly removed, repeat step c, two to three times.
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