Graco Waterborne Fluid Hose Repair, Service

Service

Graco Waterborne Fluid Hose Repair

WARNING

FIRE, EXPLOSION, AND ELECTRIC

SHOCK HAZARD

To reduce the risk of a fire, explosion, or electric shock:

DFollow the Fluid Voltage Discharge and Grounding Procedure on page 16 and be sure the ES ON-OFF lever is turned to OFF before flushing, checking, or servicing the system and whenever you are instructed to dis- charge the voltage.

DClean all the parts with a non-flammable fluid as defined on the front cover of this manual.

DDo not service this equipment unless you are trained and qualified.

DDo not touch the gun nozzle or come within 4 inches (101.6 mm) of the nozzle during gun op- eration or until after following the Fluid Voltage Discharge and Grounding Procedure..

WARNING

PRESSURIZED EQUIPMENT HAZARD

To reduce the risk of an injury, follow the Pressure Relief Procedure on page 16 before checking or servicing any part of the system and whenever you are instructed to relieve the pressure.

Damaged hoses or hoses that have a “pin-hole” dielec- tric failure, close to the end of the hose, can be re- paired by cutting away the failed portion and restrip- ping the hoses to the dimensions shown in Fig. 29.

1.Discharge the voltage as instructed on page 16.

2.Relieve the system pressure as instructed on page 16.

3.Disconnect the fluid hose from the gun and voltage isolation system.

4.Cut off the damaged end of the hose. If the hose has a pin-hole failure, strip back the outer hose jacket (H) and the conductive layer (J) about 12 inches (105 mm) on each hose end. Look for the failure point, which will be a very small pin-hole, discolored due to arcing. Continue stripping back the hose until the failure point is found.

5.Carefully cut through the outer hose jacket (H) and peel it back about 12 inches (105 mm). Do not cut into the conductive layer (J) of the hose.

6.Cut through the first 1/2 inch (12.7 mm) of the conductive hose layer (J) to create an edge to hold onto. Peel back the conductive hose layer by unwrapping it in a spiral pattern. Cut it off at the dimension shown in Fig. 29.

7.Cut off the inner hose layer (K) to the dimension shown in Fig. 29.

8.Inspect the hose for any nicks or cuts. Any nicks or cuts into the inner hose layer (K) will weaken the dielectric strength of the hose and shorten the service life. Repeat the above procedure if any damage is found.

9.Install a new barbed fitting by applying red dielec- tric grease to the outside of the barbs, and press- ing the fitting into the gun end of the hose. Refer to the drawing of the Waterborne Fluid Hose Assem- bly on page 48.

10.Install the three o-rings on the barbed fitting.

11.Connect the fluid hose to the gun as instructed on page 12.

Measurements, inches (mm)

A*	B*	C	D

7.75 + 0.1	9.375 + 0.1	4.075 + 0.1	4.375 + 0.1
(196.85 +	(238.13 +	(103.5 + 2.5)	(111.1 + 2.5)
2.5)	2.5)

*The measurements specified are for use with the Graco H2O PRO Voltage Block isolation system.

Isolation System End	Spray Gun End
B	D
A	C

KJ HJ K

05180

Fig. 29

42 308584