Repair

Repair Fluid Regulator

For complete cartridge fluid regulator repair refer to instruction manual 308647. For complete mastic fluid regulator repair refer to instruction manual 307517.

See FIG. 57 and perform the following steps.

NOTICE

Carefully handle the hard carbide ball, valve actua- tor, and valve seat to avoid damaging them.

1.Prepare Fluid Plate Assembly for Repair, page 80.

2.Remove the cartridge assembly by loosening the valve housing (CE) with a 6 mm hex wrench and pulling the cartridge assembly out of the base hous- ing (CD).

NOTE: The retaining nut (CC) often loosens when removing the cartridge assembly from the base housing. Be sure to re-torque as described in step 4.

3.Inspect and clean the internal walls of the base housing (CD).

NOTE: Be careful to not scrape or gouge the internal walls of the base housing. They are a sealing surface.

4.Re-torque the retaining nut (CC) to 140-160 in-lb (16-18 N•m).

NOTE: You must re-torque the retaining nut before you install it in the base housing during step 5.

5.Install the new cartridge assembly in the base hous- ing (CD), and torque the valve housing (CE) to 30-35 ft-lb (41-48 N•m).

NOTE: The valve seat is double sided and may be reversed for extended life. The o-ring and ball must be replaced. See instruction manual 308647.

Cartridge Regulator 244734 Shown

cartridge assembly

diaphragm and valve actuator subassembly

FIG. 57: Replace Cartridge Assembly

CD

 

Torque Sequence for Regulator

 

 

Base Housing Screws (CF)

4

 

1

CC

 

CF

 

 

CE

2

3

 

84

3A2098H

Page 84
Image 84
Graco 3A2098H important safety instructions Repair Fluid Regulator, Cartridge Regulator 244734 Shown