26
Chemical filter clogged: Clean Filter.
Chemical screen not in chemical: Ensure end of
chemical hose is fully submerged into chemi-
cals.
Chemical solution too thick: Dilute chemical.
Chemical solutions should have same consis-
tency as water.
Pressure hose too long: Lengthen water supply
hose instead of pressure hose.
Chemical build-up in chemical injector: Have
parts cleaned or replaced by authorized dealer.
NO OR LOW PRESSURE
(after period of normal use)
Worn seal or packing. Worn or obstructed
valves. Worn unloader piston. Worn E-Z start
valve. Have parts cleaned or replaced by au-
thorized dealer.
WATER LEAKING AT SPRAY GUN/SPRAY
WAND CONNECTION
Worn or broken O-ring: Check and replace O-
ring.
Loose hose connection: Tighten hose connec-
tion.
WATER LEAKING AT PUMP
Loose connections: Tighten hose connection.
Piston packings worn: Have parts cleaned or
replaced by authorized dealer.
Worn or broken O-rings: Have parts cleaned or
replaced by authorized dealer.
Pump head or tubes damaged from freezing:
Have parts cleaned or replaced by authorized
dealer.
OIL LEAKING AT PUMP
Oil seals worn: Have parts cleaned or replaced
by authorized dealer.
Loose drain plug: Tighten drain plug.
Worn drain plug O-ring: Inspect and replace
O-ring.
Worn fill plug O-ring: Inspect and replace O-
ring.
Pump overfilled: Check for correct amount.
Incorrect oil used: Drain and refill with correct
type and amount of oil.
Vent plug clogged: Clean vent plug. Use air
hose to free it of blockage. If problem persists,
replace vent plug.
TECHNICAL DATA
POWER
DISPLACEMENT
MAXIMUM PRESSURE
MINIMUM FLOW FEED
HIGHEST TEMPERATURE
MOTOR ROTATION SPEED
TANK CAPACITY
WEIGHT
4 HP
118 cc
2 500 PSI (172 bar)
6,3 L/min
60˚C
3 500 r/min
2 L
30,6 kg (67,4 lb)
PUMP PULSATES
Nozzle obstructed: See “Using Spray Wand”
section.
HG840 manual.indd 26
02/02/16 5:29 p.m.
