Willys MB - ADJUSTMENTS AND TESTS IN VEHICLE.

TM 9-1803A
20-2 1
ORDNANCE MAINTENANCE - ENGINE AND ENGINE ACCESSORIES FOR %TON
4x4 TRUCK (WILLYS-OVERLAND MODEL MB AND FORD MODEL GPW)
radiator brace through the radiator bracket mounted on top of the
radiator; press the other end through the hole in the cowl (fig. 5),
and install the lock washers and nuts.
k. Install Battery. Set the battery in the battery tray with the
negative post toward the front of the vehicle. Install the battery
hold-down frame, wing nuts, and battery cables.
1. Final Operations. Make sure the radiator and engine drain
cocks are closed, and install the specified coolant.
Tighten the oil
pan drain plug, and install the specified amount and grade of oil.
Start the engine. If the oil pressure does not register immediately
on the oil pressure gage, stop the engine. Remove the oil pump relief
valve retainer and prime the oil pump. Make adjustments and tests
as outlined in paragraph 21.
21. ADJUSTMENTS AND TESTS IN VEHICLE.
a. Adjust Clutch. The free travel of the clutch pedal must be ad-
justed so that the pedal will have %-inch free travel before the clutch
starts to disengage. Loosen the clutch control lever cable adjusting
yoke lock nut. Turn the clutch control lever cable counterclockwise
to decrease the pedal free travel, and clockwise to increase the pedal
free travel. When a G-inch free pedal travel is obtained, tighten the
clutch control lever cable adjusting yoke lock nut.
b. Set Timing With Neon Light.
(1) PRELIMINARY WORK. Loosen the screw in the timing hole
cover, and move the cover to one side. Make certain the ignition
switch is in the “OFF” position, then turn the engine with a crank
until the timing mark “IGN” (fig. 42) on the flywheel is in line with
the index mark on the engine rear plate.
Mark the line under the
timing mark “IGN” with chalk or white paint.
(2) CONNECT TIMING LIGHT (fig. 45). Attach the high tension
lead of the timing light to the terminal of No. 1 spark plug.
Attach
the positive low tension lead to the positive terminal of the battery,
and connect the negative low tension lead to the negative battery
terminal.
(3) USE THE TIMING LIGHT. Start the engine, and allow it to
warm up.
Set the engine idle speed at 600 revolutions per minute.
Point the timing light at the timing mark opening so that it can flash
on the flywheel. If the timing mark “IGN” on the flywheel appears
at the index mark on the opening in the engine rear plate, the timing
is correct.
If the timing mark “IGN” on the flywheel appears lower
than the index mark, the timing is too far advanced.
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