Repair; Prepare Equipment For Service; Disconnect The Pump Lower - Graco E-Flo Y31 Series Instructions Manual

Repair

NOTE: There are no user-serviceable parts in the
motor. Contact your Graco representative for
assistance.

Prepare Equipment for Service

1. Stop the pump at the bottom of its stroke.
2. Shut off and lock out the electrical disconnect (A).
3. Follow the Pressure Relief Procedure, page 13.
4. Follow the Flushing Procedure, page 14.
5. Disconnect the hoses from the lower and plug the
ends to prevent fluid contamination.

Disconnect the Pump Lower

Disconnect the lower from the motor. Use a repair
manual that corresponds with your model. Find your
specific lower model in the Pump Matrix on page 19.
Yxxx1x Models
1. Remove the hairpin clip (23) and slide the coupling
cover (22) up to remove the coupling assembly (14).
3A7826A
12
23
2
22
F . 9 Loosen the coupler
IG
2. Unscrew the locknuts (20) from the tie rods (12).
3. Separate the lower (2) from the tie rods (12).
Non-Yxxx1x Models
1. Loosen the coupling nut (16) from the coupling
adapter (13), and remove the coupling collar (15).
13
15
16
12
2
F . 10 Loosen the coupler
IG
2. Remove the coupling nut (16) from the piston rod.
3. Unscrew the locknuts (20) from the tie rods (12).
4. Separate the lower (2) from the tie rods (12).
Repair
14
piston rod
17