7
Working Troubles
Hydraulic Table Operation
In any case of trouble first of all:
1) check oil pressure and adjust to 300 p. s. i.
(22 kg/cm
2
)
2) check oil level in tank
3)
evacuate the air from the system as de-
scribed on page 5.
If
the table reversals are jerky or too slow
the hydraulic system may need adjustment,
read page 5.
If
the pressure gauge is at zero while the
motor is running :
Check direction of rotation of the pump;
the pump should rotate counterclockwise as
seeen from front of machine.
Check tension of V-belt;
V-belt may be tightened by the screw 1723 ,
page 25 .
The first time the pump is started after oil
filling, the pump may be too d ry and there
fore unable to suck the oil from the tank.
In
that case, oil is added through one of the
hoses 127 1 on page 15 . The hose next to the
column is d isconnected at the upper end;
hydraulic fluid is poured into the hose; the
hose is reassembled and the pump is started.
The filter No. 195 1 page 25 may be blocked.
In that case the tank must be pulled out and
the pump dismounted. The filter is cleaned
in kerosene.
Automatic Downfeed
In
case of troubles:
Bleed the hydraulic hose by opening the
screw V.
If
the pawl is working ( can be heard)
without moving the hand wheel the friction
clutch should be tightened ( see page 24 ).
The parts nos. 553 and 5 70 have threaded
holes and are screwed on the shaft 177.
When these parts are screwed further up
on the shaft, the friction clutch is tightened.
Electrical Equipment
If all motors are dead :
Check the fuses.
Note: The vertical feed motor is switched
off when automatic downfeed is engaged.
Grinding Finish
A poor finish may have one of these reasons:
Wrong choise of wheel for the job at hand.
Wheel out of balance.
Wheel not dressed properly.
These points were mentioned above.
Excessive play in the spindle bearings may
also have a bad influence on the perfor
mance.
The radial play in the front-bearing should
be . 0001"-. 0001 5 " (0,002-0 ,004 mm).
It is strongly recommended that spindle ad
justments be left to the factory.
