Perform this procedure on these TSC configurations:

• TSC 300 psi
• TS 1000 psi (This configuration has the coolant-pump cart.)
• TSC 1K psi

For the Captive Stub Shaft Compensating TSC Union Replacement, refer to the: 40-Taper - Inline - Captive Stub Shaft - Compensating TSC Union - Replacement - VMC
Note: If you are unsure which commpensating TSC union is installed on the machine, refer to the Compensating TSC Union - Identification Guide.

Note: For troubleshooting information, refer to the TSC Compensating Union Troubleshooting Guide.  

• 93-30-12534 TSC TAB UNION ASSY INLINE BRASS SERVICE

• Spindle Lock Tool (T-1635)
  
• Red-I Grease
  
• Dial Indicator (that can measure 0.0001") with Magnetic Base
  
• 99-0698 TSC union alignment tool

Machine Requirements:

• Software Version 100.22.000.1000 or higher

Remove the TSC hose, union air pressure, and drain lines from the union.

Remove the union and TSC shaft from the motor.

 Note: The TSC shaft has left-hand threads.

To install the replacement shaft [2]:

• Be sure the threads and o-ring on the shaft [2] are clean.
• Apply Red-I grease [1] to the o-ring of the shaft [2].
• Turn the shaft [2] counterclockwise to install it onto the spindle motor.
• Torque the shaft [2] to 30 ft-lb (41 Nm).
• Remove the spindle lock tool.
• Use the dial indicator [3] to measure the total indicated runout (TIR) of the shaft [2] and the top carbide [4].

The radial [3] and axial [4] TIR must be less than .0005''.  If the TIR exceeds this value, shim the TSC shaft.

To shim the TSC shaft:

Measure the radial runout [1].

Mark the high spot with a pen [2].

Loosen the TSC shaft enough to create a gap between the TSC shaft and the motor shaft.

If the radial runout is than .0015'' use .0005'' shim stock.

If the radial runout is greater than .0015'' use .001'' shim stock.

Insert the shim at the marked location [3] and torque the TSC shaft to 30 ft-lb.

Trim away the excess shim stock.

After shimming the TSC shaft:

Measure radial runout [1].  It must not exceed .0005''.

Measure axial runout [2].  It must not exceed .0005''.

If shaft runout cannot be corrected with shims contact Haas service.

Install the compensating union with the mounting bolts [1] loose and insert the aligment tool [2] through the fitting on the top of the coolant union to align it with the motor shaft.

 NOTE: The T-tool may not fit in the bore anymore, to align the union you will need to float it in.

Turn the motor by hand to make sure the shaft is not rubbing as you tighten the union bolts.

If the T-tool does not fully insert rotate the motor by hand while with the other hand feel if the union is rubbing with the shaft.

If no rubbing is present torque the bolts to 12 ft-lbs (16 Nm)

Remove the alignment tool.

Run the spindle motor at 100 RPM and slowly ramp up speed to verify the union is not rubbing on the shaft.

Note: A flat ended dowel pin or other cylindrical part that is 0.275 inches in diameter and at least 2.6 inches long is needed for this step.

Insert your dowel pin [1] into the top JIC fitting [2] until you feel it contact the piston [3].

 Note: The top cover has been removed in this image to illustrate the piston. Do not disassemble the union.

Lightly press downwards until you feel the piston [3] contact the shaft [4] to eliminate the gap [5]. The piston will move about 0.040".

Install the replacement TSC hose from the check valve to the union. Install the new 5/32 clear hose from the spindle solenoid to the union. Connect the drain hose to the union.

With no tool in the spindle, command TSC.

Check that a steady stream [1] of coolant comes out of the spindle.

Check the amount of coolant coming out of the drain tube. There should be no coolant draining but a steady drip [2] is acceptable.

Run TSC with the spindle at 1000 RPM. Slowly ramp the speeds up to the maximum spindle RPM.

The union may make ringing noises as the carbide wears in. This noise should diminish within minutes of running for the first time. The noise may return briefly each time the speed or pressure is increased.

Check that a steady stream [1] of coolant comes out of the spindle.

Check the amount of coolant coming out of the drain tube. There should be no coolant draining but a steady drip [2] is acceptable.

Insert a TSC tool with a small orifice [1] in the spindle, run TSC with the spindle at 1000 RPM. Slowly ramp the spindle speeds up to the maximum RPM.

Check that the amount of coolant coming out of the drain tube is not more than a steady drip [2].