Ingersoll-Rand ARO 637140-4B, Operator'S Manual, Page: 8 / 12

Page 8 of 12 670093 (en)
TROUBLESHOOTING
Product discharged from air exhaust.
y
Check for diaphragm rupture.
y
Check tightness of (6) diaphragm nut.
Air Bubbles in product discharge.
y
Check connections of suction plumbing.
y
Check “On rings between intake manifold and fluid caps.
y
Check tightness of (6) diaphragm nut.
Pump blows air out main exhaust when stalled on either
stroke.
y
Check (169) “U” cup on (167) pilot piston.
Low output volume.
y
Check air supply.
y
Check for plugged outlet hose.
y
For the pump to prime itself, it must be mounted in
the vertical position so that the balls will check by
gravity.
y
Check for pump cavitation - suction pipe should be
sized at least as large as the inlet thread diameter of
the pump for proper flow if high viscosity fluids are
being pumped. Suction hose must be non-collaps-
ible type, capable of pulling a high vacuum.
y
Check all joints on intake manifolds and suction con-
nections, These must be airtight.
y
Inspect the pump for solid objects lodged in the dia-
phragm chamber or the seat area.
DIMENSIONAL DATA
Dimensions shown are for reference only, they are shown in inches and millimeters (mm).
7.982
6.003
8.185
0.312
0.375
Ø 6.000
10.016
11.296
1.990
4.108
Material Outlet
1/2 - 14 NTPF - 1
Material Inlet
1/2 - 14 NTPF - 1
Air Inlet (2)
1/4-18 PTF SAE Short
Figure 4