Repair
22 3A2989V
Replace Solenoid Inlet Air Regulator (644)
1. Remove Control Box Shrouds.
2. Remove Air Control Assembly (18).
3. Disconnect air line from air regulator (644).
4. Remove gauge (616) from block (643).
5. Remove screws from quick clamps (642) holding air
regulator assembly (644) in place.
6. Open clamps (642) at hinge and pull apart from
block (643).
7. Remove regulator assembly (644) and replace with
new.
8. Follow steps in reverse order to reassemble.
9. Set new air pressure regulator to at least 80-85 psi
(0.55-0.58 MPa, 5.5-5.8 bar).
Replace Purge Box Inlet Air Regulator (160)
1. Remove Control Box Shrouds.
2. Disconnect air line from regulator (160).
3. Remove fittings (177, 161). Remove regulator
assembly (160).
4. Follow steps in reverse order to reassemble.
F
IG. 5: Air Control Assembly (18)
604
640
631
633
611
617
615
613
606
618
603
609
629
625
620
621
622
617
612
616
610
607
608
635
633
634
635
629
627
628
627
632
636
626
638
632
637
619
618
630
641
646
644
645
642
642
643
647
613
Ref. 27
*160
*177
*161
* Hazardous location only.
642
643
641
643