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9.10. CHANGING A WHEEL
Replace the wheel in the following sequence:
— apply the handbrake;
— place chocks under the wheels from the side opposite to the wheel to be
removed;
— loosen six nuts of the wheel to be removed;
— place the jack (Fig. 9.10) under front axle beam or rear axle near the
wheel to be lifted and drive out screw
2
by hand as far as it will go. In case of
loose ground, place a pad or a firm board under the jack base;
Fig. 9.10.
Jack
1 — head; 2 — screw; 3 and 4 — operating plungers; 5 —
handle; 6 — delivery plunger; 7 — shutoff needle; 8 — plug
— screw shutoff needle
7
all the way clockwise, insert tommy bar into han
dle 5 and rocking the tommy bar make lifting of the vehicle so that the wheel
clears the ground by 4–5 mm;
In case of failure of lifting by the jack, open shutoff needle
7
and rock the
tommy bar several times to remove air which could get into the working cham
ber.
Plunger liftoff limitation is mechanical, by effort increasing on the handle
at the end of the lifting stop the lifting.
— remove six nuts of the wheel, replace the wheel and fit the nuts;
— lower the vehicle slowly opening shutoff needle
7
of the jack by turn
ing it in a counterclockwise direction;
— tighten six nuts and remove the chocks;
— adjust the tire pressure.
When using and storing the jack the following rules should be observed:
1. To maintain vehicle stability place chocks under the wheels of the op
posite side and apply the handbrake.
