MTS Model 293-22 Hydraulic Service Manifold - Manual (Page 48)

12. Stand the container in the ultrasonic unit tank and submerge the element in the container for at least
five minutes. Allow additional time if the element is exceptionally dirty.
13. Remove the element from the container. Apply compressed air to the element to remove fluid and dirt.
14. Empty, rinse, and refill the container with cleaning solution.
15. Repeat Step 12 and Step 13. Inspect the element. If contamination is still present, repeat Steps 12
through 14 until it is clean, or discard the element and replace it. If replaced, proceed to Step 17.
16. Empty the container. Rinse and fill it with rinsing solution. Repeat Step 12 and Step 13.
17. Replace the filter bowl seal. Install the element on the manifold. Ensure that the filter bowl seal is seated
in its channel.
18. Screw the filter bowl into place until it is seated. Tighten it to 40.7 N•m (30 lb•ft).
19. Empty the drain pan. Replace the cap on the drain port fitting.
20. Replace the vent plug. Tighten it to 47.5 N•m (35 lb•ft).
21. Test the system after you have finished:
a) Apply low pressure and check the filter bowl and drain port for leaks.
b) Switch to high pressure and check the filter bowl, vent plug, and drain port for leaks.
c) To tighten components, remove pressure.
d) Repeat pressure checks until leakage is stopped.
Model 293.22 HSM Pilot Filter Replacement
Replace the filter element if the indicator pops out. If fluid is cold when you start the pump, the pilot pressure
indicator may pop out. Let the fluid warm up, press the indicator in, and replace the filter element if it pops
out again.
Fluid filtration is provided by a 3 µ (absolute) pilot pressure filter. The replacement filter kit is MTS part
number 052-957-701. The kit includes a 3 µ (absolute) pilot pressure filter, an O-ring filter bowl seal, and
a back-up retainer ring. The MTS part number for the filter element only is 010-088-309.
Warning :
Pilot pressure is always present as long as pressure is available from the HPU. With the HPU
off, residual pressure can still exist in hydraulic systems.
Opening a hydraulic line or component that contains pilot or residual pressure can cause
sudden, unexpected pressure release resulting in injury to personnel or damage to equipment.
Before you compromise a hydraulic line or component, make sure that the HPU is turned off
and the residual pressure is zero. To bleed a circuit to zero requires that you bleed the circuit
at the accumulator valve or wait a minimum of twenty minutes after the HPU has been turned
off.
1. Turn off the HPU or remove hydraulic pressure from the hydraulic input of the HSM.
2. Place a drain pan under the filter drain port and remove the cap from the port.
3. Remove the vent plug from the filter bowl. Allow the fluid to drain for five minutes.
4. Manually turn the filter bowl counterclockwise (when viewed from above) to remove it.
5. Remove the filter element and discard it.
48 | Model 293.22 Hydraulic Service Manifold
Maintenance