Graco Aluminum Husky 2150 LP, Instructions Manual

Page: 14 / 34

Troubleshooting
14 3A8693B
Troubleshooting
1. Follow Pressure Relief Procedure, page 12,
before checking or repairing the equipment.
2. Check all possible problems and causes before
disassembling equipment.
Problem Cause Solution
Equipment cycles at stall or
fails to hold pressure at
stall. Worn check valve flappers (116), seats (115)
or gaskets (112, 114). Replace. See page 16.
Equipment will not cycle, or
cycles once and stops. Air valve is stuck or dirty. Disassemble and clean air valve. See
page 21. Use filtered air.
Check valve flapper (116) is stuck. Replace flapper and seat. See
page
16.
Check valve flapper (116) is stuck due to
overpressurization. Install Pressure Relief Valve. See
page
11.
Dispensing valve clogged. Relieve pressure and clear valve.
Equipment cycles but will
not prime or no flow.
Excessive suction lift. Ensure the suction lift does not exceed
the maximum listed in Technical
Specifications, page
32. To aid with
priming, fill the chambers with liquid.
Equipment operates
erratically. Clogged suction line. Inspect; clear.
Sticky or leaking check valve flapper (116). Clean or replace. See page 16.
Diaphragm ruptured. Replace. See page 18.
Restricted exhaust. Remove restriction.
Air bubbles in fluid. Supply line is loose. Tighten.
Diaphragm ruptured. Replace. See page 18.
Loose inlet manifold components, damaged
gasket (121) between manifold components,
or damaged check valve gaskets (112, 114). Tighten manifold bolts (120) or replace
seats (115) or gaskets (112, 114, or
121). See page 16.
Loose diaphragm shaft bolt (107). Tighten or replace. See page 18.
Damaged o-ring (108). Replace. See page 18.
Fluid in exhaust air. Diaphragm ruptured. Replace. See page 18.
Loose diaphragm shaft bolt (107). Tighten or replace. See page 18.
Damaged o-ring (108). Replace. See page 18.
Equipment exhausts
excessive air at stall. Worn air valve block (7), o-ring (6), plate (8),
pilot block (18), u-cups (10), or pilot pin o-rings
(17). Repair or replace. See page 21.
Worn shaft seals (402). Replace. See page 18.