ACCESSORIES - ALL MODELS
SERVICE MANUAL NUMBER 28
90-863160 MAY 2000 Page 8A-5
Checking Vacuum Drop-Off
1. Connect a leak proof shut-off valve and pressure gauge between the Power Shift cylin-
der input flange and the vacuum connection at the engine manifold. Position the valve
toward the manifold side and the gauge toward the power shift cylinder.
50446
a
a-Engine Manifold To Power Shift Cylinder Vacuum Hose
50445
a
b
c
d
e
f
g
h
i
e
Locally Obtained Components
a-Vacuum Gauge
b-Coupling
c-T-fitting
d-Hose Barb Coupling
e-Hose Clamp
f-Short Vacuum Hose
g-Leak Proof Shut-off Valve
h-Coupling
i-Hose Barb
2. With the engine running at idle, turn off the valve in the vacuum line. If the vacuum drops
to “0” (zero) in less than 5 seconds in either test, install a gasket rebuild kit.
a. TEST1: With the cylinder piston in NEUTRAL.
b. TEST 2: With the cylinder piston in REVERSE.
50422
a
b
a-Neutral
b-Reverse
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