ACE Valve Repair Kit for -P Pneumatic Section

To begin, use a 3/32 Allen wrench to remove the shoulder screws that hold the assembly together.

Next, remove the cartridge from the air cylinder or pneumatic section using a 9/32 Allen wrench to loosen the four screws. These screws are under tension due to internal springs, so holding the assembly together while loosening the screws helps make the process easier. Once the screws are removed, take off the cap. You can then separate the sleeves that hold the screws and access the O-ring. There is one seal in this section. Note that some ACE valves may have only one section in the air cylinder, which would lack the middle plate present in this particular model.

It’s essential to keep all parts organized so you know which pieces belong to which end of the assembly. This ACE valve includes a twin piston, although other models may have only one piston and cylinder. To disassemble the piston assembly, use a spanner wrench inserted into the two holes to prevent it from turning. Alternatively, you can carefully clamp the piston into a vice. Since this piston is made of aluminum, avoid damaging it by using a smooth-face vice or applying light pressure. Once the piston is secured, loosen the screw, and remove all O-rings for replacement.

The RPK 1323-P repair kit includes the necessary springs and O-rings. Refer to the parts breakdown to ensure proper reassembly. Pay special attention to the alignment of the vent holes on the center block and bottom block, as these should be on the same side during reassembly. The small vent holes must also align when the assembly is complete. To remove the O-rings, use a small screwdriver or a pick tool, such as one from the CSTK-1 kit, which is sold separately. Carefully remove the O-ring from the center block, as well as those on each piston and the end caps. Be cautious with seals located on screws, as they can be tricky to remove from threaded areas.

To reassemble, reverse the process. Apply a light coat of grease to all O-rings to ensure they slide into place smoothly. Insert the seal back into the center block, pressing it gently until it settles into the groove. The seals for the pistons are thicker than the others, so use the correct seals for each section. After greasing the seals, install them under the pistons. The base block and the four remaining O-rings, which are all the same size, can now be installed.

Install the new spring included in the kit, followed by reassembling the piston. Ensure that the small hole on the center block faces up when aligning the pistons. The top piston, which has a stem on the bottom, should fit into the small hole, and the bottom piston attaches to it. Confirm that the larger pocket on the bottom piston aligns correctly. Once everything is in position, secure the screw with its O-ring.

To tighten the screw through the upper piston, use a smooth-face vice or a spanner wrench to hold the assembly steady. Avoid damaging the aluminum piston. If you don’t have a spanner wrench, you can improvise with Allen wrenches inserted into the holes to keep the piston from turning. Once the piston assembly is ready, install O-rings into the grooves on both sides of the center block. Ensure they are seated correctly before sliding the block into position.

With the pistons aligned and the vent holes facing the same direction, install the seals and attach the top cap. Apply a layer of MagnaLube grease to the seals and the interior of the cylinder. Push the bottom cylinder onto the piston, ensuring a proper fit. The shorter top cylinder is then installed on the opposite side. Ensure that all seals stay in place during this step. The orientation of the top cap does not matter, but the spacers must align with their respective pockets in the assembly.

To secure the assembly, insert the screws lightly and ensure that everything aligns properly. Tighten the screws evenly in small increments to prevent binding, which could lead to air leaks. Use gentle pressure to ensure the seals compress evenly and the assembly remains parallel. Once all screws are seated and lightly tightened, perform a final check to ensure everything is secure but not overly tight.

The bottom cartridge contains an O-ring that acts as a cushion when the pieces come together. Insert the shoulder screws, tighten them, and clean up any excess grease. Double-check the assembly to confirm that the vent holes are properly aligned and the center block is positioned correctly. The vent hole on the center block should be slightly offset to the left when viewed from the correct angle. Compare the assembly to the parts diagram to verify accuracy.

This completes the reassembly of the pneumatic section. Additional videos cover the installation of other repair kits. If you have questions or need to purchase a repair kit, feel free to contact us.