1-15-96 96-8100
HAAS AUTOMATION, INC.
51
MECHANICAL SERVICE
SERVICE
MANUAL
VF-SERIES
4. SPINDLE ASSEMBLY
PLEASE READ THIS SECTION IN ITS ENTIRETY BEFORE ATTEMPTING TO REPLACE SPINDLE.
IMPORTANT!
The current pulley is shrink-fitted onto the spindle and is not field-serviceable. It is identified by two threaded holes on
top of the spindle pulley. Should any attempt to remove the pulley damage the spindle or its components, the service
warranty will be voided.
If the VMC being serviced has an old style pulley and requires removal, refer to service manual 96-8100, 4/13/93 for
further assistance.
NOTE: The drive belt's tension should be adjusted after every service on the transmission or spindle of the machine.
4.1 SPINDLE CARTRIDGE REMOVAL
1. Ensure the VMC is ON. You will need to raise and lower the head stock to remove the spindle. Place the cardboard
on the mill table to protect the surface.
2. Remove cover panels from head stock area as described in "Head Covers Removal" section.
3. Remove the tool release piston assembly in accordance with appropriate section.
4. Remove the spindle drive belt from the spindle pulley as shown in previous section. It is not possible to
completely remove the belt at this time.
5. First disconnect the oil line from the fitting at the oil injection cover, then remove the brass fitting.
NOTE: When replacing a new design spindle in any vertical machine, it is important to note that the cavity
between the housing and the spindle cartridge will be filled with either oil or grease. An oil filled spindle
is identified by the oil fill hole to the left side of the spindle head near the spindle bore as viewed from the top.
6. Ensure oil plug is inserted into oil injection port of spindle before removing spindle or oil may spill into the
spindle cartridge.
7. With the 5/16" hex wrench, loosen approximately two turns the six SHCS holding the spindle to the underside of the
head casting.
8. Place the block of wood (minimum 6" thick) on the table directly under the spindle.
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