Cashco P7 - Manual (Page 4)

IOM-P7 4
6. Insert smallest o.d. of piston (5) into largest i.d.
of sleeve (3). Press tighly together for metal to
metal contact. Press this assembly into body
(1).
7. To re-attach body assembly to upper & lower
case assembly, position body (1) on bonnet (2)
and rotate body (CW) to secure tight metal to
metal seal. NOTE: Align post (42) with recees
in piston (5).
F. Trim Inspection & Replacement: (All designs)
1. Remove pin (10) and baffl e plate assembly (7)
(8)(9). NOTE: spring pin (9) is pressed into
baffl e plate (7) fl ush to top surface. Pitot (8) is
threaded tight into bottom side of baffl e plate
(7).
2. With body securely clamped in vise remove
seat (11) turning (CCW). Remove and replace
o-ring (27). At re-assembly, tighten seat (11)
metal to metal into body (1).
3. Remove body from vise and rotate end to end
180 degrees to reclamp body in vise with body
cap (16) upwards.
4. Turn body cap (CCW) to remove and replace
o-ring (17). At re-assembly tighten body cap
(16) metal to metal to body (1).
5. With a pick type tool, locate leading edge of
spiral retaining ring (21) in the body cap (16)
and lift upwards slightly. Grab the elevated
end with needle-nose pliers and rotate (CCW)
to remove. At re-assembly replace with new
retaining ring (21).
6. Remove retainer (20). Remove and replace
o-ring (19) and backup ring (18).
7. Grasp end of plug (12) and pull upwards to
remove. Slide return spring (15) off of plug
(12).
8. Secure plug (12) in a vise with vent screw (14)
directed upwards. Turn vent screw (CCW) to
remove and replace seat disc ((13). NOTE:
chamfer on seat disc (13) faces away from the
plug. At re-assembly tighten vented screw (14)
into plug per following torque values:
For Cv Size Torque to in/oz.
0.8 65
2.0 96
D. Piston Replacement - Dome Loaded Design:
1. Securely install the body (1) in a vise with the
loading dome (2) directed upwards.
2. Remove dome (2) by grasping the fl ats and
turning (CCW).
3. Grab piston (5), lift up to remove piston & sleeve
(3) from body (1). Remove and replace o-rings
(4 & 41).
4. With thumb, press down on top of piston (5) to
separate piston from sleeve (3). Remove and
replace o-ring (6).
5. Insert smallest o.d. of piston (5) into largest i.d.
of sleeve (3). Press tighly together for metal to
metal contact. Press this assembly into body.
6. Place dome (2) on body- turning (CW) to secure
body (1) and dome (2) fi rmly together.
7. Refer to Section IV for start up.
E. Piston Replacement - Ratio Loaded Design:
1. Securely install the upper & lower case assem-
bly (43) (44) in a vise with the body(1) directed
upwards.
2. Remove body (1) from upper & lower case as-
sembly (43)(44) and bonnet (2) by grasping the
fl ats on the body (1) and turning CCW. NOTE: It
is not necessary to dis-assemble upper & lower
case assembly. Do not remove post (42) from
upper & lower case assembly to maintain align-
ment of post (42) with pressure plate (46).
3. Rotate body assembly end to end 180 degrees
and securely install in a vise with piston (5)
upwards.
4. Grab piston (5), lift up to remove piston & sleeve
(3) from body (1). Remove and replace o-ring
(4).
5. With thumb, press down on top of piston (5) to
separate piston from sleeve (3). Remove and
replace o-ring (6).
5
For DOME or RATIO Loaded remove all loading pres-
sure. Fail ure to so may result in fl ying parts that could
cause personal injury.
WARNING 3