ITW 104020, Инструкция по эксплуатации, Страница: 25 / 28

Instruction Manual
Page 25 of 28 Issue: 1.2
\\Argon\automotive_ftp\Manuals\Word Original\Pump Unit Maple 60 R1.2.docx
Maintenance – Section 6.2 – Fault Finding
Symptom Possible Cause Remedy
Pump will not
‘Prime’
a. Air getting into the suction
hose/manifold
b. Worn piston seals
c. Ball checks not seating correctly
a. Check seals and hose connections
b. Replace piston seals
c. Inspect, clean/replace balls/seats
Pump will not run a. No Air or Fluid supply
b. Air piston seal worn.
c. Pilot valve assemblies inoperable.
d. Main air valve inoperable
e. QE diaphragm defective
f. Ball checks not seating
a. Check air and fluid supply ball valves
and supply hoses.
b. Replace Piston seal
c. Switch/interchange pilot valves to
isolate faulty pilot valve and
clean/replace.
d. Check clean/replace Air valve.
e. Check for constant exhaust air when
pump is not running. Check/replace
QE diaphragms
f. Inspect, clean and/or replace balls
and seats.
Pump runs but has
excessive pulsation a. Air getting into fluid line, air supply
restricted.
b. Obstructed fluid ball checks.
c. Worn piston seals. Worn/failed air
motor shaft seals. Worn/loose air
motor shaft seal components. Worn
fluid piston and/or seal.
d. Air exhaust restricted.
e. Surge eliminator malfunction
a. Check seals and hose connections.
Check air supply
b. Remove, clean, and inspect seat,
ball, and ball cage. Replace if
suspect or worn.
c. Replace piston seal. Disassemble
pump as required to replace all seal
components on both sides.
d. Check QE diaphragms and exhaust
outlet.
e. Check surge eliminator for correct
operation.
Paint leaking into
detection hose (17)
Air bleeding from
rear vent port. a. Bellows seal failure
b. Air motor shaft seal leaking
a. Replace bellows seal (26)
b. Check air motor shaft seal (6),
replace as necessary