The car GA3-66 is a two-axle truck with a carrying capacity of 2 tons, off-road, with a drive on both axles. It is designed to replace the GAZ-63 car of the same type produced by the plant

GAZ-66 has modifications:

GAZ-66-01 - a car with a tire pressure control system;

GAZ-66-02 - a car with a winch and a tire pressure control system;

GAZ-66-04 - a car with a tire pressure control system and shielded electrical equipment;

GAZ-66-05 - a car with a winch, a tire pressure control system and shielded electrical equipment.

When creating the GAZ-66 car, special attention was paid to obtaining high cross-country ability and driving stability.

To obtain a rational distribution of the load along the axles on a GAZ-66 car, the cab is located above the engine.

The GAZ-53A car with a carrying capacity of 4 tons with a rear axle drive is designed to transport various goods on all types of roads. The main components of the cars are interchangeable.

GAZ-53

Loading capacity, kg 4000

Maximum weight of a towed trailer with a load, kg 4000

Weight of the car in running order (without additional equipment) 3250 kg

The weight of the vehicle equipped with a winch is 3640 kg.

Vehicle overall dimensions, mm:

  • Length 6395
  • Width 2380

Height (over cab without load) 2220

Car base 3700 mm

Front wheel track (on the ground) 1630 mm

Rear wheel track (on the ground) 1690 mm

Lowest points of the vehicle (with full load), mm:

Drive axle housings 265

Front axle 347

Turning radius on the track of the outer front wheel 8 m

Maximum vehicle speed with a full load without a trailer (on a level road section with improved surface) 80-86 km/h

Reference fuel consumption measured in summer for a run-in vehicle driving with a full load in fourth gear at a constant speed of 30-40 km/h on a dry, level road with improved surface and short climbs not exceeding 1.5% (1 ˚), l/100 km 24

GAZ-66

Load capacity 2000 kg

Maximum trailer weight with a load of 2000 kg

Weight of the car in running order (without additional equipment) 3440* kg

The weight of the vehicle equipped with a winch is 3640 kg.

Vehicle overall dimensions, mm:

  • Length 5655
  • Width 2342
  • height (over cab without load) 2440
  • height (on awning without load) 2520
  • Vehicle base 3300 mm
  • Front wheel track (ground) 1800 mm
  • Rear wheel track (ground) 1750 mm

Lowest points of the vehicle (with full load), mm:

drive axle housings 310

The turning radius along the track of the outer front wheel is 9.5 m.

Maximum vehicle speed with a full load without a trailer (on a level road section with improved surface) 90-95 km/h

Reference fuel consumption measured in summer for a run-in vehicle driving with a full load in fourth gear at a constant speed of 30-40 km/h on a dry, level road with improved surface and short climbs not exceeding 1.5% (1 ˚), l/100 km 24

Engine

Number of cylinders and their arrangement 8, V-shaped

Cylinder diameter 92 mm

Piston stroke 80 mm

Cylinder displacement, l 4.25

Compression ratio (average) 6.7

Maximum power (limited by the regulator) at 3200 rpm, hp 115

Maximum torque at 2000 - 2500 rpm, kGm 29

Cylinder order 1-5-4-2-6-3-7-8

Cylinder block - Cast from aluminum alloy integral with the upper part of the crankcase, equipped with wet easily removable liners, which have an insert in the upper part

made of anti-corrosion cast iron

Cylinder heads - Removable aluminum alloy, common to four cylinders in each bank

Pistons - Aluminum alloy, tin plated, flat bottom

Piston rings Cast iron, two compression and one oil scraper; top compression ring chrome plated, others tin plated

Piston pins - Floating type, steel, hollow

Connecting rods - Steel, forged, I-section, with a bushing in the upper head and steel liners, with an anti-friction layer in the lower head

Crankshaft - Cast ductile iron, four crankshaft. The crankpins have dirt traps

Main bearings - Thin-walled, tri-metal bearings, identical for each of the five bearings

Camshaft - Steel, forged, on five bearings, equipped with rolled bushings with an anti-friction layer

Camshaft drive - Pair of gears with screwsth tooth

Valves - Arranged in a row in the cylinder head. Exhaust valves are sodium cooled

Pushers - plunger type

Valve drive - Tappets, rods and rocker arms

Valve timing (with a gap between valves and rocker arms of 0.35 mm)

inlet valves:

  • opening 24° to east. m.t.,
  • closing 64° a.m. m.t.

exhaust valves:

  • discovery 50° BC m.t.,
  • Closing 22° after c. m.t.

Inlet and outlet piping - Intake piping is cast aluminum alloy with liquid mixture heating;

exhaust pipes (right and left) - cast iron

Lubrication system - Combined: under pressure and spray

Oil pump - Gear type, two-section.

From the upper section, oil enters to lubricate the engine, the lower section supplies oil to the centrifugal oil filter

Oil filter - Centrifugal

Crankcase ventilation - Open type

Engine cooling - liquid, forced, with centrifugal pump

The cooling system has a thermostat installed in the outlet pipe

Fan - Six-bladed, driven by a V-belt from the crankshaft

Fuel pump - Diaphragm with additional manual drive

Fine filter - Ceramic or mesh

Carburetor - K-126B, two-chamber, balanced, with falling flow

Revolution limiter - Pneumocentrifugal type

Air filter - Inertial oil with a contact filter element

Transmission

Clutch - Single disc, dry

Gearbox - Three-way, with synchronizers in third and fourth gears

Gear ratios:

  • first gear 6.48
  • second 3.09
  • third 1.71
  • fourth 1.0
  • Reverse 7.9

Transfer box - Has two gears: direct and low with a gear ratio of 1.982

The driveline GAZ-53 has two shafts and three cardans, equipped with an intermediate support, GAZ 66 has three shafts and six cardans

Main drive axles - Bevel, hypoid type, gear ratio 6.83

Differential:

  • GAZ-53 - Bevel gear;
  • GAZ-66 - Cam, increased friction

Stub axles:

  • GAZ-53 flanged, pivot
  • GAZ-66 Have cardans of equal angular speeds

Chassis

GAZ-53 tires - Low pressure 8.25—20 or P type

GAZ-66 tires - Extra low pressure 12.00—18

Front wheel alignment:

camber

  • GAZ-53 1˚
  • GAZ-66 0˚45'

King angle

  • GAZ-53 8°
  • GAZ-66 9˚

Inclination angle of the lower end of the kingpin forward

  • GAZ-53 2°30'
  • GAZ-66 3˚30'

toe-in

  • GAZ-53 1.5—3 mm
  • GAZ-66 2—5 mm

Springs - Four longitudinal semi-elliptical, the ends are embedded in rubber supports

Shock absorbers - Hydraulic, double-acting telescopic

Car GAZ-53 - Mounted on the front axle

GAZ-66 - Installed on both axles

Steering

Steering gear type - Globoidal worm with three-ridged roller

Gear ratio - 20.5 (average)

Power steering - hydraulic

Longitudinal tie rod - Tubular. The tie rod connections with the steering arm and the pivot arm have ball pins and springs, the tightening of which is regulated

Tie rod GAZ-53 - Tubular, connected to the levers by means of hinges of a non-adjustable design

Tie rod GAZ-66 - Rod, connected to the levers of the pivot pins by means of ball pins

Brakes

Foot brakes - Shoe brakes on four wheels

Foot brake drive - Hydraulic with hydrovacuum booster

Handbrake GAZ-53 - Central drum type on the driven shaft of the gearbox

Hand brake GAZ-66 - Central drum type on the driven shaft of the transfer case

Electrical equipment

Wiring system - Single wire with negative terminal connection to ground

Network voltage, V - 12

Generator GAZ 53A - G130-G, power 350 W, GAZ-66 - G130-V or G130-E, power 350 W

Relay-regulator GAZ 53A - RR 130, GAZ-66 - RR 130 or RR111

Battery 0 6-ST-66-EM

Starter - ST130-B with remote start

Ignition coil GAZ 53A - B-13, GAZ-66 - B13 or B5-A with additional resistance SE102

Breaker-distributor GAZ 53A - R13-B, GAZ-66 - R13-B or R105

Spark plugs GAZ 53A - A11-U, GAZ-66 - A11-U or A15-B

Cab and platform

Cabin - MetallicI, double, two-door. The cabin is equipped with a heater, two windshield wipers, a glass washer, sun visors, soft seats, floor mats. There is a removable hanging bed.

GAZ 53A platform - wooden with a metal frame. Tailgates - rear and both side

GAZ-66 platform - metal. Has three longitudinal benches and a soft removable awning. Tailgate

Dimensions of the GAZ 53A platform, mm:

  • Length 3740
  • Width 2170
  • board height 680

Dimensions of the GAZ-66 platform

  • Length - 3330
  • Width - 2050
  • Height of sides - 890

Special equipment GAZ 66

Winch - Maximum pull on cable 3500 kg. cable length 50 m.

Drive by cardan shafts from the power take-off

Power take-off - Has two gears: for winding and unwinding the cable

Compressor ― Air-cooled single cylinder

Adjustment data

Gap between rocker arms and valves on a cold engine (temperature 15-20°C), mm - 0.25 - 0.30

It is allowed to set a gap at the extreme valves of both rows (inlet first and eighth, outlet fourth and fifth cylinders), mm 0.15 - 0.20

The gap between the electrodes of the candles is 0.8 - 0.9 mm

Gap in breaker 0.3 - 0.4 mm

Clutch pedal free play, mm GAZ 53А 32—42, GAZ-66 35—45

Brake pedal free play, mm 8 - 13

Tire pressure, kg/cm2:

  • Front wheels 2.8*
  • rear wheels 4.3

* When fitting type P tires, the pressure in them must be:

  • on front wheels - 5 kg/cm2,
  • on the rear - 6 kg / cm2.

Filling capacities and norms

Fuel tanks (capacity), l GAZ 53A - 90, GAZ-66 - 210 in two tanks

Engine cooling system, l:

  • with starting heater 23
  • without starting heater 21.5

Engine lubrication system (including centrifugal filter), l - 8.0

Air filter, l 0.55

Gearbox housing, l 3.0

Gearbox housing with power take-off, l 4.2

Transfer box housing, l 1.5

Rear axle housing, l GAZ 53A - 8.2, GAZ-66 - 6.4

Front axle housing, l GAZ-66 - 7.7

Steering gear housing 0.5

Shock absorber 0.41

Winch gearbox housing, l 0.8

Power steering, l 1.8

Front axle stub axles, kg GAZ-66 - 1.0

Front wheel hubs, kg 0.25

Brake drive system, l 0.76