Dosatron D14MZ5 User manual

Extend the Life of Your Dosatron

REBUILD KIT

D14MZ5

CHAT at www.dosatronusa.com

This kit is for the Dosatron D14MZ5 and consists of two parts:

Congratulations on purchasing your

Dosatron Rebuild Kit.

Part #: MKD14MZ5AF • MKD14MZ5VF

MKD14MZ5VVF •MKD14MZVAF

Part 1 - Piston Kit Contents:

PDI651 - Omega Spring

PDI649 - Connecting Rod

PDI648 - Push Rod Seal

PDI643 - Upper Flange

PDI644 - Lower Flange

• Part 1 - Piston Kit

Part 2 - Seal Kit Contents:

PJDI117 - Check Valve Assembly

(VF and AF)

PJDI118 - Check Valve Assembly

(VVF and VAF)

JDI122 - Injection Stem O-Ring

JDI100 - Injection Sleeve O-Ring

JDI121 - Plunger Seal

• Part 2 - Seal Kit

Remember to wear proper protection when performing maintenance

such as gloves, eyewear, and apron.

1-800-523-8499 • 1-727-443-5404

D14MZ5

Part 1: Piston Kit Instructions

Begin by removing the piston

from your Dosatron injector.

Unscrew and remove the bell

housing (you may use a

universal strap wrench), pulling

the piston out of the body. Set

the bell housing and body aside.

Remove the plunger by twisting

a quarter turn counter clockwise

and set aside.

In order to remove the top or

larger diameter ange, locate the

small notch inside the black

piston shell. This is where a

tooth, on the inside of the

ange, locks it into place.

CHAT at www.dosatronusa.com

You will need to apply pressure

to the ange on either side of

the notch as you twist the ange

counter clockwise. It may be

a snug t. Lift to remove and

discard.

Flip the piston upside down

and follow steps 3 and 4 to

remove the lower or smaller

diameter ange.

To remove the motor and valve

support assembly from the piston

shell, you will need a at head

screwdriver. Using the

screwdriver, remove the upper

valves from the guide. The

valves look like golf tees and

will drop down and out of the

piston shell. Set them aside.

1-800-523-8499 • 1-727-443-5404

Grasp the top of the white plastic

parts of the mechanism and lift

straight up.

You now have two

subassemblies – the push rod

on the left and the valve support

frame on the right.

In order to disassemble the push

rod, remove the connecting rod

off the Omega spring.

CHAT at www.dosatronusa.com

Twist to remove the Omega

spring out of the push rod.

Install the new Omega Spring

(Part #: PDI651) by carefully

pushing the Omega spring into

the push rod.

Slide the other end of the Omega

spring into the new Connecting

Rod (Part #: PDI649). The key

to this step is to make sure the

curved top of the push rod faces

in the same direction as the

Omega spring.

Replace the Push Rod Seal

(Part #: PDI648). Remove by

grasping and turning counter

clockwise. Carefully slide the

new push rod seal onto the

push rod as far as it will go and

twist a quarter turn clockwise

to lock.

1-800-523-8499 • 1-727-443-5404

Install the new Upper Flange

(Part #: PDI643) by locating the

small tooth on the inner diameter

of the ange.

Now locate the notch on the

piston shell.

Be careful not to install the

ange upside down.

CHAT at www.dosatronusa.com

Align the tooth with the shell and

press down and twist a quarter

turn clockwise to lock. If it is

difcult to twist or if the ange

lifts up easily, just remove the

ange, realign and try again.

Install the new Lower Flange

(Part #: PDI644) the same way.

Before reinstalling the push rod

and valve support assembly, look

inside the piston shell. You will

notice four holes in a line and a

single hole on the other side.

1-800-523-8499 • 1-727-443-5404

Notice how the valve support

frame aligns on the side with the

four holes, making sure it goes

into the grooves.

To demonstrate the alignment

of the push rod assembly, the

curved top would face inward,

inserting the push rod into the

single hole. This is where

the connecting rod sits in

the piston.

The key is to make sure the

white connecting rod drops

into the notches inside the

piston shell.

CHAT at www.dosatronusa.com

Now to insert both the valve

support frame and the push rod

into the piston shell, use your

index nger to push on the

spring. This will set everything

into place and you will hear

a click. If the parts aren’t

tting together, just lift both

subassemblies out and try again.

Insert the upper valves into the

bottom of the upper area,

snapping them into the valve

support frame.

To test the piston pull the push

rod up and press it down a few

times. It should click in both

directions.

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