coolant is supplied to the right-ha

coolant is supplied to the right-hand half-block. Control of the hydraulic coupling switch is described in Section «Cooling System».
Auxiliary fuel tank cock. For using fuel contained in the auxiliary tank, transfer it into the main fuel tank after opening the cock by the cock control handle (Fig. 17).
Hand fuel feed pump is mounted on the low-pressure fuel feed pump casing. For feeding the fuel to the high-pressure pump, if the engine does not run, slightly press down handle / (Fig. 18), turn counterclockwise to free it from fixed position and reciprocate it up and down. Upon transfer of fuel, depress the handle and fix it by turning fully clockwise.
Shut-off valves are used for shutting off the air pipes leading to the trailer. Valve / '(Fig. 19) is open when its handle is along the valve body, and closed, when it is across it
Coupling head 2 is used for connecting the truck air system with that of the trailer or semitrailer.
Air take-off valve is mounted under the hood on the cab front panel. For taking off, turn out plug 2 (Fig. 20), connect the hose end (available in the set of tools) and turn handle 1 crosswise on valve body 3.
Towing valve (Fig. 21), mounted on the front buffer right-hand bracket, is used for feeding air to' the truck brake system in towing, when its engine is out of order.
To connect truck tractor to the truck air pipes unscrew plug 1 of towing valve and connect air hose with coupling head available in the driver’s tools kit.
Winch control levers are shown in Fig. 22. Use of the winch is described in Section «Winch».
Storage-battery switch (Fig. 23) is mounted on the battery container bracket. If the distance control system fails, the switch may be turned on or off by pressing upon the button under the rubber-made cover.
External start socket is provided on the engine. Using the plug delivered with each truck, it is possible to start the engine from a d. c. external source.
DESIGN, OPERATION, ADJUSTMENT AND SERVICING OF TRUCK COMPONENTS AND UNITS
ENGINE
The truck utilizes engine model KamAZ- 740.10. Engine elevation and cross sections are shown in Figs 24 and 25.
Cylinder Block, Cylinder Heads and Crank Mechanism
Cylinder block is an iron casting having wet liners; cylinders in the left-hand row are displaced at 29.5 mm forward relative to the right-hand row. Water jackets formed inbetween the liner and the block is packed with rubber rings. At the top the ring is clamped under the shoulder in a liner groove, at the bottom, two rings are fitted in a block groove.
The block is bored in assembly with main bearing caps; therefore, they are not interchangeable and are mounted in precisely fixed position. The crank¬case section is coupled with main bearing caps by; means of transverse tie bolts. Collars provided in the- block front cover and flywheel housing are used for sealing the crankshaft front and rear ends.
The flywheel housing upper section is used as a cover for distributor shaft gears and auxiliary drives.
Cylinder heads (Fig. 26) are aluminium-alloy castings, intended individually for each cylinder and having valve fit-in seats and guides; the heads have water jackets that communicate the blocks jacket., Coolant and oil by-pass holes arranged between the head and block and also the head on the outline are all sealed with moulded rubber rings 15 (see Fig. 25) and gasket 14. Relative to the block, the head is fixed by two pins and secured thereon with four bolts. Steelmade sealing ring 10 (see Fig. 26) is press- fitted in a bore provided on the head lower face.
Valve mechanisms and injectors are arranged in the cylinder heads.
The cylinder head may be dismantled only for re-pairing parts of the piston and connecting rod group, gaskets, valves or for replacing the head proper. Re-moval of the cylinder heads during the guarantee period is not permissible without the manufacturer’s approval.
Before fitting the head, wipe clean the block and head mating surfaces and check that the gasket is placed properly.
Cylinder head fastening bolts should be tightened on the cooled engine in three attempts in the sequen¬ce of consecutive numbers as shown in Fig. 27. Tigh-tening torque, N-m (kgf-m): attempt I — 40—50
(4—5); attempt II — 100—130 (10—.13); attempt
III — 160—180 (16—18). Before screwing in, coat the bolt thread with graphite lubricant. After tighten¬ing the bolts, check and readjust, if need be, the clearances between the valves and rockers.
Crankshaft is steel, hardened by h. f. current or nitriding having five main journals and four connect-ing-rod crankpins. The connecting-rod crankpins have internal chambers in which the oil is cleaned ad-ditionally, so the connecting rod liners are guarded against solid particles and soil.
Crankshaft cheeks, front and rear ends mount counterweights: on cheeks, integrally with the crank-shaft, on front and rear ends, they are press-fitted in assembly. .
The crankshaft front end mounts a gear used for : driving the oil pump; and the crankshaft rear end mounts a timing gear with an oil deflector.
The shaft is locked against axial displacement v with four steel-aluminium half-rings fitted in the recess of the rear main bearing so that the grooved ; side fits the shaft thrust ends. f
Main and connecting-rod bearings of the crankshaft are of replaceable design, thin-walled, three- 4 layer bearings having working layers of leaded bron- ; ze. The main bearing upper and lower liners are of non-interchangeable design. The main bearing upper liners have drill-holes used for feeding oil and grooves for dispensing. The connecting-rod bearing up- | per and lower liners are made interchangeable. ..
Flywheel is a cast iron piece mounted on the crankshaft rear end. For adjusting the engine a slot