4-11. TO  BLEED  PRESSURE  FROM  TYPE  I  AND TYPE 11 SERVICING UNITS a. Type   I   Servicing   Unit   -   to   bleed   the   air pressure from a Type I servicing unit, proceed as follows (See Figure 4-3) (1) Close   charging   valves   (19)   and   close   air cylinder valves (2) (2) Place cam lever valves (5) in the up (open) position (3) Open    manifold    shut-off    valve    (10)    and service valve (14). (4) Open bleed-off valve (18) NOTE If it is necessary to bleed-off the breathable air remaining In the air cylinder (1), open air cylinder valves (2). (5) When    all    pressure    has    bled    from    the breathable air system, close all open valves b TYPE I1 SERVICING UNIT (AIR/OXYGEN) -   To   bleed   the   Air/Oxygen   pressure   from   a   Type   II Servicing Unit, proceed as follows (see Figure 4-4) (1) AIR   half   of   Type   1I   System   -   bleed   AIR pressure as per paragraph 4-11 a (2) Oxygen half of Type II system is as follows (a) Close  charging  valves  (40)  and  close oxygen cylinder valves (23) (b) Place cam lever  valves  (26)  In  the  up (open) position (c) Open manifold shut-off valve (31) and service valve (35) Open    BLEED-OFF    VALVE    slowly    Bleed system slowly. (d) Open bleed-off valve (39) NOTE If   It   Is   necessary   to   bleed-off   the   breathable   oxygen remaining   in   the   oxygen   cylinders   (22),   open   oxygen cylinder   valves   (23),   lever   cam   valve   (26)   and   bleed valve (39) (e) When  all  pressure  has  bled  from  the oxygen system, close all open valves 4-11. GAS  CYLINDER  LOCATION  ON  TYPE  I  (AIR) AND TYPE II1 (AIR/OXYGEN) SERVICING UNITS NOTE All component part descriptions as to location is from the Panel View a. For   the   purposes   of   attaching   flex   hose assemblies from the gas cylinders (Air or Air/Oxygen) to the  proper  cam  lever  valve  on  the  control  panels,  the following number sequences shall apply (see Figure 4-5) TYPE I (AIR) (1) Facing  the  control  panel,  from  left  to right, cam lever valves will be numbered I through 8 Attach flex hose line from numbered gas cylinder to the correspondingly  numbered  cam  lever valve TYPE II (AIR/OXYGEN) (2) AIR - See Type I above (3) OXYGEN  -  Facing  the   control   panel oxygen  bulkhead  is  on  the  nght  hand side,  numbered  one  (1)  through  four (4) Attach flex hose line from numbered    oxygen    gas    cylinders    to correspondingly  numbered  cam  lever valve 4-12 EMERGENCY BLEED PROCEDURE In case of an emergency that would require  immediate  bleeding  of the  breathable  air  servicing  unit  (Type  I)  or  air/oxygen servicing  unit  (Type  II),  open  all  cam  lever  valves  (2. Figure   4-1)   and   (2,   14,   Figure   4-2)   and   open   bleed valves (14, Figure 4-1) and 6, 18, Figure 4-2) 4-9