Apply a thin layer of lithium grease to these parts:
- transfer tube 
- (2) transfer tube o-rings 
- pin-coupler bushings 
- spindle coupler pins 
Install the transfer tube .
Turn the spindle until the lubrication port  aligns approximately with the position recorded when you removed the spindle.
Visually align the bushings  to the pins  on the motor coupler.
Caution: An incorrectly aligned coupler can cause damage to the bearings.
Slowly jog the Z Axis in the negative (-) direction over the spindle.
While you jog the Z Axis, use your hand to turn the spindle. If you feel a change in tension, stop immediately. Align the coupler pins to the bushings again.
When the spindle is fully into the spindle housing, do these steps:
- Turn the spindle to align it with the tapped holes in the casting.
- Install the (6) spindle screws .
- Torque the screws. Refer to Haas Fastener Torque Specifications.Use the value for iron.