EFD 740V-HL User Manual

For assistance call 800-556-3484 or email [e-mail]

The 740V-HL hand-operated dispense gun is a rugged
industrial lever-actuated fluid dispensing valve. The valve
incorporates a quick-change fluid body for fast and easy
cleaning. The fluid inlet fitting for 1/4" OD feed tubing and
an assortment of dispensing tips are included.

EFD is a registered trademark of EFD, Inc. ©2005 EFD, Inc. 740V-HL-MAN-01 v072905

#615DTH

1.0 liter tank accommodates a
one pound bottle.

#61522
Hand-lever
valve stand

#2000F755
Five micron filter regulator for
clean, dry filtered factory air.

Shutoff valve

Typical system setup

®

A NORDSON COMPANY

For application assistance in the USA, call 800-556-3484.

For EFD sales and service in over 30 countries,
contact EFD USA or go to www.efd-inc.com/contact

EFD Inc., a Nordson Company
977 Waterman Avenue
East Providence, RI 02914-1342 USA

Telephone: [phone]
Fax: [phone]

[e-mail] www.efd-inc.com

Getting started ...

1. Install the feed tube from the fluid reservoir to the inlet
fitting and tighten the compression nut to secure. The fluid
body may be rotated up to 1/2 turn to locate the fluid inlet
fitting in a comfortable position.

2. Apply air pressure to the fluid reservoir. Start with a low
setting of 20 psi (1.4 bar). If using an EFD fluid reservoir,
refer to the User’s Guide for further instructions.

3. Install an appropriate size dispensing tip to the outlet tip
adapter. Use large tips for high viscosity materials and
small tips for low viscosity.

4. Press the hand-lever to begin fluid flow. Release lever to
stop fluid flow.

5. To achieve desired flow, change the size of the dispensing
tip or adjust the reservoir fluid pressure.

User’s Guide
740V-HL Dispense Gun

®

A NORDSON COMPANY

Electronic pdf files of EFD manuals are also available at www.efd-inc.com/manuals.html

Service

Normal cleaning is accomplished by purging with a solvent appropriate
for the material being dispensed. .

To thoroughly clean valve chamber and replace needle packings:

1. Remove the fluid inlet fitting and tip adapter/needle seat assembly
from the fluid chamber.

2. Remove the fluid chamber from the cylinder body by turning
counterclockwise until free. Then remove the O-ring from the fluid
chamber.

3. Remove the needle packings from the fluid chamber, using tool
#7803 supplied with the valve. Insert through outlet end of fluid
chamber and push out the packings.

See Figure 1

.

4. Remove any remaining packings and the packing spring from the
needle.

5. Clean the needle with a cloth dampened with solvent.

6. Lubricate the needle with Nye Lubricants #865 grease and reinstall
the needle packing spring and a new packing kit.

See Figure 2.

7. Install a new O-ring (#7517) on the fluid chamber. Screw the
cylinder onto the fluid chamber. Hand tighten only. The chamber
can be turned back out up to 1/2 turn to orient the fluid inlet
fitting to the desired position.

8. Reinstall the tip adapter/seat assembly.

Piston and needle
assembly #7805-SS

Fluid inlet fitting
#7543BP

Cylinder cap

#7529

Nylon thrust

washer #7809

Piston return spring
#7413

Nylon thrust washer
#7809

Snap ring #7526

Bail hanger
#7412

Cylinder and lever
assembly #7410A

O-ring #7517

Needle packing
assembly #7810

O-ring #7806

O-ring #5148RV

Retaining washer #7807

Packing spring #7808

Tip adapter /
seat assembly
#7404

Fluid chamber

#7402

To replace the piston and needle assembly:

1. Remove the cylinder cap by turning counterclockwise until free.

2. Remove the piston return spring, thrust washers and snap ring.

3. Pull the piston and needle assembly out of the air cylinder, using
small pliers on the spring pilot at the top of the piston.

4. Clean the cylinder body wall and lubricate with Nye Lubricants
#865 grease.

5. Lubricate the needle with Nye Lubricants #865 grease, then
reinstall in the cylinder.

6. Reinstall the snap ring.

7. Reinstall thrust washers, spring and cylinder cap.

See Figure 3.

Maintenance Tools:

packing extraction tool (part #7803)
snap ring pliers (customer supplied)
small pliers (customer supplied)
6” adjustable wrench (customer supplied)

Figure 1

Needle packing
assembly

Packing seat

Stainless steel
packing expander

O-ring

Retaining washer

Spring

Cylinder body

Piston and needle
assembly

Cylinder cap

Nylon

thrust washer

Piston return
spring

Nylon

thrust washer

Snap ring

Spring pilot

Packing

extraction tool

#7803

Fluid chamber

O-ring

Figure 3

Figure 2

CAUTION: Check the reservoir pressure gauge prior to performing

any maintenance to assure that pressure is zero (0). To confirm this
on EFD tanks: slide the shutoff valve on the air hose away from the
tank, and open the pressure relief valve on the tank.

For assistance, please call 800-556-3484.