Hitachi SERIES D, 220-856 manual Sion Hazard on

Troubleshooting

PROBLEM	CAUSE	SOLUTION
Paint leaks into wet-cup	Packing nut is loose	Tighten. See page 8.
	Throat packings are worn or	Replace packings. See page 14.
	damaged
Excessive surging from spray	Spray tip or fluid filter is plugged	Disassemble and clean.
gun
	Spray tip too big or worn	Change spray tip.
	Paint too viscous	Thin the paint.
	Wrong type hose	Use minimum 50 ft (15 m), grounded, flex-
		ible hose (wire braid hose is
		unacceptable).
Not enough paint pressure	Pressure setting too low	Increase the pressure.
	Spray tip too big or worn	Change the spray tip.
	Pressure control frozen or damaged	Try to thaw2, or replace pressure control.
	by overpressurization3
	Pump worn or damaged	Replace pump. See page 14.
Tails or fingers in spray	Pressure setting too low	Increase pressure.
pattern
	Fluid outlet filter (if used) is dirty or	Clean filter. See instructions supplied
	clogged	with it.
	Spray tip too big or worn	Change spray tip.
	Fluid supply is low or empty	Refill and prime pump. Check fluid supply
		often to prevent running pump dry.
	Paint too viscous	Thin paint.
	Wrong type hose	Use minimum 50 ft (15 m), grounded, flex-
		ible hose (wire braid hose is
		unacceptable).
Paint runs or sags	Spray tip to big or worn	Change spray tip.
Spitting from gun	Air in fluid pump or hose	Check for loose connections at pump
		intake and tighten. Then prime pump.
	Spray tip is partially clogged	Clear tip. See page 8.
	Fluid supply is low or empty	Refill and prime pump. Check fluid supply
		often to prevent running pump dry.
Static sparking from gun	Spray or work being sprayed is not	Correct problem before continuing. Follow
	properly grounded	the warning section, FIRE OR EXPLO-
		SION HAZARD on page 2.

1The electric motor has an over-temperature switch which automatically resets upon cooling. If it opens and the electric motor shuts itself off, unplug the power supply cord and let the sprayer cool for 30 to 60 minutes. Always use the lowest pressure setting needed when spraying. Prevent overspray from restricting the motor air pas- sages; check and clean often.

2Freezing results from failure to replace the water-base paint or flushing water with mineral spirits, and usually causes permanent damage to the pressure control.

12￿ 3￿7￿83￿

3Over-pressurization results from (1) using less than 50 ft (15 m) of flexible spray hose, (2) from using a wire braid spray hose, (3) from adding a shutoff device between the pump outlet and the spray gun, (4) from attaching a spray hose to the pressure drain valve, or (5) from using a clogged or incorrectly assembled filter, if used.