Diagnosis And Testing - Vacuum Reservoir; Removal; Installation - Chrysler Vehicle User Manual

TJ
VACUUM RESERVOIR (Continued)
DIAGNOSIS AND TESTING - VACUUM
RESERVOIR
(1) Disconnect vacuum hose at speed control servo
and install a vacuum gauge into the disconnected
hose.
(2) Start engine and observe gauge at idle. Vac-
uum gauge should read at least ten inches of mer-
cury.
(3) If vacuum is less than ten inches of mercury,
determine source of leak. Check vacuum line to
engine for leaks. Also check actual engine intake
manifold vacuum. If manifold vacuum does not meet
this requirement, check for poor engine performance
and repair as necessary.
(4) If vacuum line to engine is not leaking, check
for leak at vacuum reservoir. To locate and gain
access to reservoir, refer to Vacuum Reservoir Remov-
al/Installation in this group. Disconnect vacuum line
at reservoir and connect a hand-operated vacuum
pump to reservoir fitting. Apply vacuum. Reservoir
vacuum should not bleed off. If vacuum is being lost,
replace reservoir.
(5) Verify operation of one-way check valve and
check it for leaks.
(a) Locate one-way check valve. The valve is
located in vacuum line between vacuum reservoir
and engine vacuum source. Disconnect vacuum
hoses (lines) at each end of valve.
(b) Connect a hand-operated vacuum pump to
reservoir end of check valve. Apply vacuum. Vac-
uum should not bleed off. If vacuum is being lost,
replace one-way check valve.
(c) Connect a hand-operated vacuum pump to
vacuum source end of check valve. Apply vacuum.
Vacuum should flow through valve. If vacuum is
not flowing, replace one-way check valve. Seal the
fitting at opposite end of valve with a finger and
apply vacuum. If vacuum will not hold, diaphragm
within check valve has ruptured. Replace valve.

REMOVAL

The vacuum reservoir is located under the vehicle
battery tray (Fig. 6).
Fig. 6 Vacuum Reservoir Removal/Installation
1 - TEE
2 - VACUUM CHECK VALVE
3 - INTAKE MANIFOLD
4 - INNER FENDER
5 - RESERVOIR
6 - SCREW
7 - VACUUM SUPPLY LINE
(1) Remove battery and battery tray. Refer to Bat-
tery Removal/Installation.
(2) Disconnect vacuum supply line at reservoir
(Fig. 6).
(3) Remove screw securing reservoir to inner
fender.
(4) Remove reservoir from vehicle.

INSTALLATION

The vacuum reservoir is located under the vehicle
battery tray (Fig. 6) .
(1) Position reservoir to vehicle and install mount-
ing screw.
(2) Tighten screw to 1.2 N·m (10 in. lbs.) torque.
(3) Connect vacuum line to reservoir.
(4) Install battery and battery tray. Refer to Bat-
tery Removal/Installation.
SPEED CONTROL 8P - 7