This procedure shows how to upgrade the H-5AX spindle chiller on VR and GM machines. 

This document applies to the following service kits:

• 93-4864 SPINDLE CHILLER UPGRADE INSTALL KIT VR
• 93-4889 SPINDLE CHILLER UPGRADE INSTALL KIT GM

Machine Requirements:

• H-5AX Spindle Head
• Software: 100.20.000.1200 or higher
• Service Key

 Note: A VR machine is used for illustrative purposes. The steps also will apply to the GM-5AX machines.

Home the Z-Axis. 

Press [EMERGENCY STOP].

Remove the sheet metal to gain access to the spindle head hose connections.

Disconnect the return hose [1] from the inlet port [2] on the VR/GM Spindle Heat Exchanger. 

Place the end of the disconnected return hose [1] into a separate container [3] to collect the chiller fluid.

With a service key in the control, enter service mode.

Press [DIAGNOSTIC].

Navigate to the I/O tab.

Turn on the spindle fan [1] in the I/O table to run the chiller.

Run the chiller until most of the VR/GM Heat Exchange fluid has been removed from the tank.

Turn off the fan to stop the chiller.

Disconnect the remaining hose [1] from the outlet port [2] on the VR/GM Spindle Heat Exchanger. 

Disconnect all cables [3] connected to the VR/GM Spindle Heat Exchanger.

Disconnect the spindle chiller hoses [1] from the fittings at the top of the machine.

Remove the spindle chiller hoses [1] from the cable carrier [2] and the coolant grommet brackets [3].

Remove the VR/GM Spindle Heat Exchanger [1] from the chiller bracket.

Remove the VR/GM Spindle Heat Exchanger bracket [1] from the column casting.

Remove the three thumb knobs [1], the cover [2], and the three STANDOFF 6-32M X 6-32M X 4 IN [3].

Note: Disconnecting the cables from the HSD board can help with the removal process but is not needed. If the cables are removed be sure to make note of their location on the board.

Remove the four nuts [1], the HSD board [2] and the four standoffs [3].

Install the VR/GM Spindle Chiller bracket [1] from the kit on to the column.

Remove the screws holding the rubber feet [2] to the bottom of the chiller.

Note: The VR/GM Spindle Chiller, without chiller fluid, weighs approximately 80 lbs. (36.29 kg). Use an appropriate lifting mechanism to help install the chiller.

Install the VR/GM Spindle Chiller [1] onto the bracket using the M5 X .8 X 35 SHCS and #10 flat washers provided in the kit.

Note: The rubber feet [2] will be placed in between the chiller and the bracket.

For H-5AX Single Yokes only:

Remove the two chiller hose fittings [1] in the spindle head manifold.

Attach the following fittings into the configuration shown in the image:

• [2] 58-2234 FITG PC10MMF NPT3/8M STR
• [3] 58-1686 FITG REDUCER NPT3/8F NPT1/4M STR BRASS
• [4] 58-2065 FITG NPT1/4F NPT1/4F STR BRASS
• [5] 58-1674 FITG REDUCER NPT1/4M NPT1/8M STR BRASS

Note: There will be two left over fittings, 58-16708 FITG POLY1/4F NPT1/4M STR BRASS. These are for machines with Double Yoke heads. 

For H-5AX Double Yokes only:

Remove the two chiller hose fittings [1] in the spindle head.

Attach the following fittings into the configuration shown in the image:

• [2] 58-2234 FITG PC10MMF NPT3/8M STR
• [3] 58-1686 FITG REDUCER NPT3/8F NPT1/4M STR BRASS
• [4] 58-2065 FITG NPT1/4F NPT1/4F STR BRASS
• [5] 58-16708 FITG POLY1/4F NPT1/4M STR BRASS

Note: There will be two left over fittings, 58-1674 FITG REDUCER NPT1/4M NPT1/8M STR BRASS. These are for machines with Single Yoke heads. 

If available, use the four lower bolt holes [1] to mount the chiller contactor assembly instead of the original bolt holes [2] for the HSD board.

Install the chiller contactor assembly [1]. Use the four STANDOFF .187ID X 0.5LG  [2] to keep the contactor away from the back of the control cabinet.

Install the three STANDOFF 6-32M X 6-32M X 4 IN [3] on the contactor assembly. 

Connect cable 33-1381 [1] to the power distribution block [2] on the transformer.

Remove cable 33-2087 from P66 on the I/O board.

Connect the spindle fan [3] cable to P66 in the I/O board.

Route cable 33-1386 [4] out the bottom of the control cabinet. 

Install the HSD board [1] onto the chiller contactor.

Install the three STANDOFF 6-32 X 2 AL ML/FML 1/4 HEX [2] onto the HSD board [1].

Install the HSD cover [1] and thumb knobs.

For VR machines built before 10/2023:

Remove the sheet metal underneath the control cabinet [1] and on the back of the column to gain access to the cable channel [2].

For VR machines built before 10/2023:

Remove cable 33-2087 [1] from the cable channel running along the back of the column.

Route the chiller power cable (33-1479) [2] underneath the control cabinet and along the back of the column. Use magnets [3] and zip ties to secure the cable to the column above the cable channel.

Verify the cable will reach the chillers power outlet. Adjust the magnet placement if needed. 

For VR machines built before 10/2023:

Install the sheet metal that was removed from underneath the control cabinet [1] and on the back of the column [2].

Note: Be careful not to pinch any cables or hoses. 

For VR machines built 10/2023 and later:

Remove the sheet metal underneath the control cabinet [1] to gain access to the cables.

For VR machines built 10/2023 and later:

Remove cable 33-2087 [1] from the cable conduit running through the base of the column.

Route the chiller power cable (33-1479) [2] in the cable conduit, underneath the control cabinet and through the base of the column. 

For VR machines built 10/2023 and later:

Install the sheet metal that was removed from underneath the control cabinet [1].

Note: Be careful not to pinch any cables or hoses. 

For GM machines :

The hoses and cables should be routed the same way the original ones were, through the bridge [1] and cable carriers [2].

Inspect the fluid tank level by looking at the fluid level gauge located on the back of the spindle chiller [1]. To add fluid to the tank, remove the cap to the inlet [2] at the top of the unit, and fill the tank with Mobil Velocite Oil No 3 (PN: 93-4894) until the gauge reads the level is at the top of the M [3] or at the H level.

Place a funnel [1] in the intake cap.

Fill the chiller with the provided chiller fluid [2].

Note: The VR/GM Spindle Chiller uses Mobil Velocite Oil No 3 (PN: 93-4894).

Note: The chiller fluid capacity is 8 Liters.

Connect one of the hoses [1] to the outlet port.

Connect the chiller signal cable to the spindle flow SW on the chiller bracket sensor cable (33-2092).

Connect the power [2] and signal cable [3] to the chiller.

Flush the remaining VR/GM Heat Exchanger fluid from the system.

Place the end of the disconnected return hose [1] into a separate container [3] to collect the chiller fluid.

With a service key in the control, enter service mode.

Press [DIAGNOSTIC].

Navigate to the I/O tab.

Turn on the spindle fan [1] in the I/O table to run the chiller.

Run the chiller until the yellow/green VR/GM Heat Exchange fluid changes to the pale-yellow Mobil Velocite Oil No 3.

While the chiller is running, verify there is no leaking from the fittings in the spindle head. Leaking indicates loose fittings or loose hose connection.

Turn off the fan to stop the chiller.

Install any the sheet metal [1] that was removed to gain access to the spindle head hose connections.

Run the spindle with a tool to verify the VR/GM spindle chiller is operating correctly. 

For more information about the chiller see the VR/GM – Haas Spindle Chiller chapter of the Haas Spindle Chiller – Operator’s/Service Manual.