Asco 8344 Installation & Maintenance Instructions Manual Download Page 4

I&M No.V5744-Sec.1

50 Hanover Road, Florham Park, New Jersey 07932   www.ascovalve.com

Page 4 of  4 (Section 1 of 2)

6. Install bonnet gasket and manual operator body with preassembled

parts into valve body.  Torque manual operator body to 175 ± 25

in-lbs [19,8 ± 2,8 Nm].

7. Replace  solenoid  base  gasket  and  solenoid  base  sub-assembly.

Torque  solenoid  base  sub-assembly  to  175  ±  25  in-lbs

[19,8 ± 2,8 Nm].

8. For further reassembly, refer to 

Valve Reassembly

 step 5.

ORDERING INFORMATION

 FOR ASCO REBUILD KITS

Parts marked with an asterisk (*) in the exploded view are supplied in Rebuild
Kits.  When Ordering Rebuild Kits for ASCO valves, order the Rebuild Kit

number stamped on the valve nameplate.  If the number of the kit is not

visible, order by indicating the number of kits required, and the Catalog
Number and Serial Number of the valve(s) for which they are intended.

solenoid base

solenoid base

stem retainer

gasket

sub-assembly

core assembly

bonnet gasket

stem gasket

stem/spacer

sub-assembly

manual operator

body

with core spring

valve seat

Captive spacer on

stem/spacer sub-assembly

must be located on the

outside

 of stem retainer

when reassembled

IMPORTANT

To engage, turn lever

clockwise until it hits a

stop

Partial view of

Manual Operator

AC & DC  Construction

AC & DC Construction

Figure 2B.  Manual Operator

Indicates that these

parts are included

in Rebuild Kit

Figure 2A

stem retainer

spacer

stem/spacer

sub-assembly

core guide

Partial cutaway view

showing positioning

of core guide and

core spring on core

assembly

IMPORTANT

core assembly

core guide

core spring

Summary of Contents for 8344

Page 1: ...cylinder IMPORTANT Do not install the speed control or any other restrictive device in either the pressure inlet connection or the exhaust outlet connection of the valve Restricting either of these lines may cause valve malfunction metering knob stem locking pawl bonnet body gasket stem gasket spring valve body disc FREE FLOW METERED FLOW INSTALLATION Check nameplate for correct catalog number pre...

Page 2: ...s or other soft material so as not to burr the edges of hole Hold piston shaft firmly with rod and unscrew locknut Disassemble piston shaft sub assembly in an orderly fashion Do not damage or mar any of the parts 11 Remove locknut shaft gasket piston with body and guide u cups 2 attached Slide piston end guide and resilient main disc off main shaft 12 Remove body u cups and guide u cup from piston...

Page 3: ...t gasket and guide gaskets 2 on piston guide C Slip piston guide with gaskets onto shaft D Position shaft gasket on shaft E Install guide u cup and body u cup on piston Make certain that open end of guide u cup faces the main valve body while open end of body u cup faces the piston end body Position the piston with u cups on shaft F Replace shaft washer and shaft nut Torque the shaft nut to 125 10...

Page 4: ... the number of the kit is not visible order by indicating the number of kits required and the Catalog Number and Serial Number of the valve s for which they are intended solenoid base solenoid base stem retainer gasket sub assembly core assembly bonnet gasket stem gasket stem spacer sub assembly manual operator body with core spring valve seat Captive spacer on stem spacer sub assembly must be loc...

Page 5: ... and 5 Seat 1 4 3 8 or 1 2 40 5 ft lbs 54 2 6 8 Figures 3 and 4 Body Screws All sizes 40 5 in lbs 4 5 0 6 Figures 3 4 5 Lubrication Parts To Be Lubricated DOW CORNING 200 Fluid lubricant upper middle and lower insert gaskets body seat gasket large small seat gaskets seat gasket DOW CORNING 111 Compound lubricant body gaskets 2 guide u cup guide gaskets 2 bonnet gasket body u cup u cup o ring Main ...

Page 6: ...nsert gaskets snap in grooves of insert Lower insert gasket fits between the recess in the lower corner of the insert and the lower corner of the pilot insert bore Middle and lower insert gaskets are the same size however the lower gasket is made of a softer material bonnet gasket disc holder spring disc holder sub assembly upper insert insert lower insert gasket see Note middle insert gasket gask...

Page 7: ...rew serves as a tool to remove insert from valve body Remove screw from insert before reassembling lower insert gasket see Note pilot orifice Do Not Damage CAUTION Note Upper and middle insert gaskets snap in grooves of insert Lower insert gasket fits between the recess in the lower corner of the insert and the lower corner of the pilot insert bore Middle and lower insert gaskets are the same size...

Page 8: ...ert gasket body 4 40 machine screw serves as a tool to remove insert from valve body Remove screw from insert before reassembling lower insert gasket see Note body long screw 4 Note Upper and middle insert gaskets snap in grooves of insert Lower insert gasket fits between the recess in the lower corner of the insert end the lower corner of the pilot insert bore Middle and lower insert gaskets are ...

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