Aftercooler - Test
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| Parameter | Value |
|---|---|
| ATAAC Pressure | Pressurize the ATAAC to |
| Allowable Leakage | Pressure decay not to exceed |
| Replace ATAAC | If decay is greater than |
| Reuse ATAAC | If decay is less than |
Use this test method before replacing the ATAAC.
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| Required Tools | |
|---|---|
| Qty | Part Number |
| 2 | 425-5681 Plug As |
| 2 | 427-1117 Seal As |
| 1 | 1/8-27 NPT Air Test Fitting |
| 1 | 1/8-27 NPT Pressure Gauge |
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| |
| Illustration 1 | g03339268 |
|
(1) 425-5681 Plug As
(2) 427-1117 Seal As | |
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| |
| Illustration 2 | g03339266 |
| (3) Bellows | |
- Remove bellows (3) and the clamps from the ATAAC tubes.
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Illustration 3 g03339280 (4) Clamps
(5) Lower ATAAC tube - Remove clamps (4) from lower ATAAC tube (5).
- Swing the lower ATAAC tube out of the way.
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Illustration 4 g03339282 (6) Left-hand upper ATAAC tube
(7) Left-hand lower ATAAC tubeShow/hide table
Illustration 5 g03339304 (1) 425-5681 Plug As
(2) 427-1117 Seal As
(8) ATAAC tube cutout represents callouts 6 and 7
(9) Plug assembly nut
(10) Pipe plug
(11) Seal assembly bolt - Lightly lubricate both plug assemblies (1) with oil.
- Install one plug assembly (1) into upper ATAAC tube (6).
Note: Always use the seal assembly during testing to secure the plug assembly in the ATAAC tube.
- Install seal assembly (2) at the end of the ATAAC tube.
Tighten seal assembly bolts (11) ...
55 ± 10 N·m (41 ± 7 lb ft) - Tighten plug assembly nut (9) to expand rubber.
- Install one plug assembly (1) into lower ATAAC tube (7).
Note: Always use the seal assembly during testing to secure the plug assembly in the ATAAC tube.
- Install seal assembly (2) at the end of the ATAAC tube.
Tighten seal assembly bolts (11) ...
55 ± 10 N·m (41 ± 7 lb ft) - Tighten plug assembly nut (9) to expand rubber.
- Remove one pipe plug (10) from the end of one plug assembly .
- Install pressure gauge into the end of the plug assembly.
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Illustration 6 g03339305 (12) Pipe plug - Remove pipe plug (12) from the upper ATAAC tube.
- Install 1/8-27 NPT air test fitting.
- Connect air test fitting to regulated air supply.
- Pressurize the ATAAC to
207 kPa (30 psi) .Note: Make sure the pressure gauge on the end of the plug assembly reads the same pressure as the regulated supply pressure.
- Shut off the air supply.
- Measure the pressure decay over 15 seconds.
Refer to Table 1 with results.
Note: If decay is greater than
28 kPa (4 psi) in 15 seconds, perform Steps 1 through 9 prior to replacing the ATAAC. If decay is less than28 kPa (4 psi) in 15 seconds, perform Step 10.Show/hide table
Illustration 7 g03339741 (13) Access panels - Remove access panels (13).
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Illustration 8 g03339765 (14) Access windows Show/hide table
Illustration 9 g03339672 (15) V-band clamp
(16) ATAAC
(17) Bellow clamp
(18) ATAAC seam - Pressurize the ATAAC to
207 kPa (30 psi) . - Shut off the air supply.
- Check ATAAC seams (18) for leakage with soapy water.
- Check V-band clamps (15) and bellow clamps (17) for leakage with soapy water through access windows (14).
- Check plug assemblies (1) for leakage with soapy water.
- Repeat the test for the ATAAC on the other side of the machine.
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| Parameter | Value |
|---|---|
| ATAAC Pressure | Pressurize the ATAAC to |
| Allowable Leakage | Pressure decay not to exceed |
| Replace ATAAC | If decay is greater than |
| Reuse ATAAC | If decay is less than |
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