Cashco P7 Manuel d'utilisateur télécharger pdf (Page 3)

IOM-P7

SECTION VI

VI. MAINTENANCE

To prevent damage to body, use soft jaws when

placing body in a vise. Position so that vise closes

over the ﬂ ats on lower end of body.

SPRING UNDER COMPRESSION. Prior to re mov ing

spring chamber, relieve range spring com pres sion

by turn ing the knob counter clock wise (CCW) until

ro ta tion comes to a com plete stop. For DOME or

RATIO Loaded remove all loading pressure. Fail ure

to so may result in ﬂ ying parts that could cause

personal injury.

WARNING 2

CAUTION D

A. General:

1. Maintenance procedures hereinafter are based

upon re mov al of the regulator unit from the

pipeline where in stalled.

2. Owner should refer to owner's procedures for

removal, handling, cleaning and disposal of

non -reuseable parts, i.e. gaskets, etc.

3. Apply a thin coat of Christo Lube to all o-rings.

4. Refer to Figure 1, Figure 2 or Figure 3 for per-

tinent design.

B. Poppet Seat & Piston Replacement - Spring

Loaded Vented Design:

1. Securely install the body (1) in a vise with the

spring knob (38) directed upwards.

2. Relax range spring (28) by turning the knob (38)

counter clockwise (CCW) until rotation comes

to a complete stop. NOTE: It is not necessary

to remove the knob (38) before removing the

spring chamber(2)-(upper assembly) from the

body (1). Remove upper assembly by turning-

spring chamber (2) (CCW). Lift upper assembly

off of range spring (28).

3. Remove spring (28), pin (40) and spring follower

(26).

4. Grab vent cap (25) by ﬂ ats and pull up to remove

piston (5) and sleeve (3) from body (1). Remove

and replace o-ring (4).

5. With thumb, press down on top of vent cap (25)

to separate piston (5) from sleeve (3). Remove

and replace o-ring (6).

6. Secure piston (5) in a vise using the ﬂ ats on

the sides of piston. Remove vent cap (25) by

turning (CCW).

7. Use a pair of needle nose pliers to grasp top of

poppet (23). Pull upwards to remove poppet,

poppet seat (24) and poppet spring (22).

8. Reinstall poppet spring (22) and poppet (23) in

piston (5). Slide new poppet seat / disc (24)

over poppet. Install vent cap (25) on piston (5),

use (CW) rotation to tighten metal to metal.

9. 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); vent cap (25) oriented upwards.

10. Place spring follower (26) with smallest o.d.

next to piston. Install spring (28).

11. Place upper spring chamber assembly on body

(1). Turn spring chamber (2) (CW) to secure

tight to body. Remove knob cover (39).

12. Rotate vent screw (36) CCW to remove screw

and spring (35). Record number of revolutions.

for removal of screw. _________

13. Lower pin (40) through top / center of adjusting

screw (34), pin should rest on top of poppet (23).

NOTE: insert a small diameter tool through

center of adjusting screw and carefully press

downward on pin (40) to conﬁ rm recoil of the

poppet spring (22).

14. Install spring (35) and vent screw (36) - recalling

the number of revolutions counted for removal

from above. Reinstall knob cover.

C. Piston Replacement - Spring Loaded

Non-Vented Design:

1. Instructions are similar to Vented with excep-

tion: Assembly does not include pin (40), per

B. 3, the poppet, (23) and poppet spring (22).

per B.7 & B.8. The poppet seat (24) is replaced

by a solid disc.

WARNING 1

SYSTEM UN DER PRES SURE. Prior to per form ing

any maintenance, isolate the reg u la tor from the sys-

tem and relieve all pres sure. Failure to do so could

result in personal injury.

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Cashco P7 Manuel d'utilisateur Page 3

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