H.E.R.O. INDUSTRIES LTD.
1100MD OWNERS MANUAL - “B” VERSION
18
TROUBLESHOOTING
SITUATION
POSSIBLE CAUSE (REMEDY)
PUDDLE OF OIL APPEARING UNDER SPRAYER DURING OPERATION
1. Hydraulic fitting loose/cracked or hydraulic lines are punctured. (examine all hydraulic lines and fittings
for cracks, breaks or looseness. Replace or tighten as required).
2. Piston seals (ref# 87) worn. (remove and replace piston seals, following closely the detailed
instructions on page 23-34).
CORRECT STATIC PRESSURE, BUT REDUCED SPRAYING PRESSURE
(Check with pressure gauge, see page 15 for details).
1. Spray tip worn out/too large. (replace with new, correct sized spray tip. Tip most not exceed a newer
condition .031 tip ).
2. Paint hose incorrect. (replace hose with genuine H.E.R.O. airless spray hose (min. 50 feet). Steel
braided hoses must not be used ).
3. Intake valve seat (ref# 18) worn. (replace intake seat closely following detailed instructions on page 21).
4. Intake ball (ref# 20) worn. (replace intake balls when signs of wear, deformation, nicks or cuts are
evident. An out of round ball is the sign of a worn intake seat,(ref# 18), and both items should be
replaced).
5. Outgo seat (ref# 35) worn. (replace seat).
6. Outgo ball (ref# 36) worn/damaged. (replace outgo ball).
LOW STATIC PRESSURE, LOW SPRAY PRESSURE
(Check with pressure gauge, see page 15 for details).
1. Pressure control valve stem screw (ref# 76) loose. (remove pressure control knob,(ref# 71), and inspect
screw for looseness. Screw should be secured to stem, (ref# 75), with Loc-Tite. If the screw turns
independent of the stem than it must be re-secured. Secure unit so it will not move. Install pressure gauge
and .021 spray tip. Obtain a piece of wood, to use as a pusher or purchase a pressure control adjustment tool,
27C-15. Remove pressure control screw and put some Loc-Tite 609 on threads. Turn the screw into the
stem a few turns and push it in to its maximum and read pressure. Turn the screw in or out until 3000 psi
static pressure is obtained. If you obtain a pressure which higher than 3000 psi, trigger gun to release some
pressure and continue adjusting screw until correct pressure is obtained. Let Loc-Tite set up.
2. Pressure control ball (ref# 84) and/or seat (ref# 83) worn. (remove entire pressure control valve,
(ref# 70), from sprayer. Remove valve seat, ball, retainer,(ref# 82), and spring,(ref# 81), from valve.
Replace with pressure control repair kit,(ref# 85). Hold valve body vertical while placing in spring,
followed by retainer. Retainer should be below the valve body (approx. 3/8") when positioned correctly.
Center ball on retainer, turn valve seat into body until finger tight, using pipe dope or Teflon tape to
seal. Fully tighten using wrench.
SPRAY PATTERN LEAVES LINES OR FINGERS
1. Pressure too low. (increase pressure slowly until problem is corrected).
2. Worn tip. (replace tip).
3. Tip too small for spray material. (change to larger tip or increase pressure. See material manufacturers
