Cashco Premier Manuel d'utilisateur télécharger pdf (Page 12)

IOM-148

15. Place a light coating of graphite powder lu bri-

cant, Dow-Corning “Molycote” (dry mo lyb de-

num disulﬁ de) or equal, on the skirted areas

of diaphragm (6), and into the “valley”. This

lubricant will prevent the diaphragm (6) from

“sticking together” or abrading itself during

piston (3) travel.

16. If actuator (AA) is supplied with a manual hand-

wheel operator (MHWO), place a heavy-duty

wheel bearing grease, Lubriplate No. 130-AA,

or equal, into the v-notch in the head of the

pivot screw (25).

17. Inspect working of manual handwheel op er a-

tor (MHWO) located within the upper casing

(1) for signs of wear. Go to Subsection F. for

maintenance of manual handwheel operator

(MHWO).

18. Place properly oriented upper casing (1) down

onto the lower casing (2) with matchmarks

aligned and all casing ﬂ ange bolt holes cen-

tered. NOTE: The casing ﬂ anges (1) (2) will

not touch together.

1. Elongated extension bolting (28) (42) is a safe ty

feature to allow relaxation of range springs (11)

to the piston’s (3) mechanical uptravel stop at

dis as sem bly.

2. Extension bolting (28) (42) should ONLY be

re placed with factory replacements; DO NOT

sub sti tute con ven tion al bolting.

3. Extension bolting (28) (42) MUST be located 180°

opposite of each other in the ﬂ ange bolt ing array.

Failure to heed could cause per son al injury at a

later dis as sem bly.

19. Insert both extension bolts (28) through two

upper casing (1) bolt holes that are located

180° across from each other; these bolts

should extend through the lower casing (2)

ﬂ ange enough to engage its companion ex ten-

sion nut (42). Place a friction-reducing thread

lubricant on the lower exposed threads of the

extension bolts (28).

20. Place the same friction-reducing thread lu bri-

cant into the threaded portion of both ex ten sion

nuts (42). NOTE: Only one end of ex ten sion

nut (42) is threaded. It is not possible to en-

gage the extension bolting (28) (42) with the

extension nut (42) upside down; the threads

of the nut (42) will not engage. Engage both

extension nuts (42) until they draw tight to the

lower casing (2) ﬂ ange’s underneath side.

Place one short bolt (27) through a bolt hole

of upper ﬂ ange (1) to serve as an indicator. In

one-rev o lu tion increments and an al ter nat ing

cross-pattern, draw the casing (1) (2) ﬂ anges

to wards each other. When there is at least

one-half of the indicator short bolt (27) threads

exposed through the lower casing (2) ﬂ ange,

engage nut (41) until the short bolting (27)

(41) is ﬁ nger-tight.

21. Place all short bolts (27) through the re main ing

upper casing (1) ﬂ ange bolt holes, and engage

each ones nut (41) until the short bolting (27)

(41) is ﬁ nger-tight.

22. In an alternating cross-pattern, tighten all

ﬂ ange bolt ing (27) (28) (41) (42) in one-

rev o lu tion increments. When all bolting (27)

(28) (41) (42) is hand-wrench tight, torque to

levels indicated below:

23. Connect a temporary instrument air source

di rect ly to the 1/4" FPT connection in the up-

per casing (1). Pres sur ize to the “Air Supply

Pressure” level as indicated in Table 2-4 of

Section IV.A.4. for the corresponding actual

benchset range of the actuator being ser viced,

and test for leakage at upper casing (1) to

lower casing (2) joint. Also test for leakage at

manual handwheel operator (MHWO), rotat-

ing handwheel (58) in and out several times

during the test.

24. Release all air pressure into actuator upper

casing (1); remove air source from 1/4" FPT

connection.

F. Manual Handwheel Operator:

1. Reference Item Number drawing at end of IOM

for de tails of the man u al handwheel op er a tor

(MHWO) sub-assembly.

2. Place unit (AA) (BA) on a ﬂ at work surface

with the handwheel (58) on topside.

3. Ensure all air pressure has been released from

ac tu a tor casing (1). Ensure handwheel (58)

is fully “backed-out” by rotating CCW (viewed

from above); i.e. is as “high” as pos si ble.

4. Remove slotted-head screw (65) securing

handwheel gland (67) to upper casing (1).

5. Place a smooth-jawed wrench onto handwheel

WARNING

Item Nos. Description

Torque Req’d

ft-lbs. N-m

27, 41 Short Bolting 15-18 20-24

28, 42 Extension Bolting 8-12 11-16

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 23 24

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Cashco Premier Manuel d'utilisateur Page 12

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