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This procedure applies to 93-3349 HPU SERVICE KIT ASSY UNIT PRE 2015. Lathe machines buit before 2015 were manufactured with 3 possible HPU's brands. They are as follows:

• Rexroth HPU
• Parker HPU
• Haas Built HPU

This kit will replace any of those old HPU's Haas used to use. This kit only includes the HPU, THE MANIFOLD BLOCK(S) ARE NOT INCLUDED IN THIS KIT. Please refer to the flow chart in the next section for further information. 

The diagram below can be used to determind what manifold block is needed for the replacement. 

NOTE: The original manifold blocks can be used if they are not damaged. Using the original manifold blocks minimizes the need for finding new fittings for hoses on the manifold, some sourcing WILL be required.

NOTE: Use the machine BOM and the proper supersession chain to order the correct part number for the manifold.

Match the following hoses to the manifold being used. The part number and thread sizes for each of the hoses has been listed for reference.

1. The hydraulic union on the spindle (58-1830 HOSE ASSY 3/4ID NPT3/4-M NPT3/4-F 48)
2. The return line ( 59-1293 FITG HOSE END JIC-6-F X -6 HOSE)
3. The inlet to the manifold. (59-1293 FITG HOSE END JIC-6-F X -6 HOSE)

The manifold will mount to the mounting bracket. Holes will need to be drilled to accommodate the location of the holes on the old manifold. The existing holes only accommodate the newer manifold. 

When placing the new HPU where the old one resided the existing holes will not line up as the new HPU has 2 bolt holes, it should fit in the location where the old HPU sat, but it is recommended to drill new mounting holes for this HPU.

Some of the older HPU's will have this return pipe on the manifold, this can be removed and a 90 degree elbow can be put in its place.

NOTE: The correct fitting thread size for the manifold will need to be sourced. The return hose from the HPU will connect to this location. 

Connect the extension cable 33-8411 SPINDLE FAN EXT CBL 13.0-STORM to the HPU and route this cable through the same location the previous wire was routed through and connect this to P32/P33 on the I/O board. A "Y" adapter  33-8107 CBL300A SP FAN "Y" ADAPTER has been included in the kit, in case something is already connected to this port. 

NOTE: If the machine has a pre-I/O S board [1] the provided connector may need to be modified to work with the pre- I/O S board.  This will plug into P35 on the pre-I/O S board, please contact Haas Service for any further assistance.