83
1-Nut; 2-housing; 3-locking rings; 4-elastic element; 5-towing hook; 6-guiding bushing; 7,9-oil cups; 8-lock
pin; 10-locking plate; 11-bolt
Figure 66 - Towing Device
When driving the truck with a trailer check the hook work area (hook mouth) wear. The
maximum allowed hook mouth wear must be not more than 58mm in diameter (new towing hook is
Ø 48
+1.9
mm). Towing device usage with a trailer drawbar eye having work area cross section over
43.9 mm is forbidden.
4.3.2 Truck Suspension
4.3.2.1
Front suspension group of 4х4, 6х6 trucks
is shown in Figure 67,
consisting of
two longitudinal half-elliptic springs 2, working together with hydraulic two-tube telescopic shock
absorbers 8. Upper eyes of the shock absorbers are fixed to the brackets 7 through rubber bushings
10, that are, in their turn, fixed to the frame girders, lower eyes are fixed to the brackets 18 welded to
the axle case.
The springs are fixed to the axle case in the middle through u-bolts 3. Axle upstroke is re-
stricted by rubber buffers 5 fastened in the spring clamp plates 4. Axle down stroke is restricted by
coupling of third spring sheet bent ends with the tie bolts 15 of rear spring brackets, where distance
pieces 16 are mounted.
Eyes 27 are fixed on the front spring ends with bolts 25 and u-bolts 19 through eye trims 21.
The springs are joined with the front brackets 1 through the eyes with pins 22, which are fixed by
wedges 28 in the brackets. Spring rear ends enter freely the eyes of rear brackets.
Depending on the front axle load the trucks can have various front springs differing by the
sheet thickness. Herein, front spring u-bolts and other fasteners are not changed.
Summary of Contents for 4320M
Page 1: ...URAL 4320М TRUCK and its Modifications ...
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Page 177: ...Figure 140 Installation of left and right side safety devices 171 ...
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