Pressure Test; In-Line Check Valve; Fuel Return System—Typical - Jeep J-10 Series 1982 Technical & Service Manual

FUEL FILTER
FROM
FUEL PUMP
B B
FUEL SYSTEMS U-9
J43185
Rg. U-l 3 Fuel Return System—Typical
FROM
FUEL
FILTER
STEEL
BALL
SPRING
FUEL RETURN
TO FUEL
TANK
60278
Rg.U-14 In-Une Check Vdve
until excess pressure is released through the fuel return
line or the carburetor needle opens. This process contin
ues as long as the engine is operating.
Fuel pumps cannot be overhauled. Replace a fuel
pump if it fails any of the following tests.
NOTE: Before performing tests, ensure the in-line fuel
filter (six- and eight-cylinder engines) is not clogged.
Pressure Test
(1) Remove air cleaner assembly.
(2) Disconnect fuel inlet fitting or fuel filter at
carburetor.
(3) Disconnect fuel return hose at fuel filter and
plug nipple on filter.
NOTE: Remove any spilled fuel from engine.
(4) Connect pressure gauge, restrictor and flexible
hose between fuel filter and carburetor (fig. 1J-16).
(5) Position flexible hose and restrictor so fuel can
be discharged into suitable graduated container.
WARNING: Use extreme caution when engine is oper
ating. Do not stand in direct line with fan. Do not put
hands near pulleys, belts or fan. Do not wear loose
clothing.
(6) Operate engine at curb idle rpm and discharge
fuel into container by momentarily opening hose
restrictor.