Middle axle gearbox: types and features of repair

The KAMAZ axle gearbox is one of the most important components of the transmission. Its role is to convert and transmit torque from the crankshaft to the wheels. The main technical characteristic of this mechanism is the gear ratio (the ratio of the number of teeth of the driven and driving gears). It can vary from 4.98 to 7.22.

Today, the KAMAZ axle gearbox has more than 135 models, divided into 5 modifications by gear ratio. For example, a KAMAZ axle gearbox with 49 teeth has a gear ratio of 6.53, and a KAMAZ rear axle gearbox with 46 teeth has a gear ratio of 4.98. Each modification is designed to work in certain conditions. A high gear ratio indicates increased traction force, so such units are used when operating a vehicle on mountain roads with long climbs. For flat routes, a KAMAZ axle gearbox with a low gear ratio is suitable.

PRICE LIST for KAMAZ gearboxes

Features in design

As a rule, the middle axle of trucks is located closer to the rear wheels. This allows for the distribution of vertical loads and traction forces for the formula of the wheel system of types 6 by 6 and 6 by 4. The design of the middle axles, regardless of the model, contains gearboxes of the middle axle, axle shafts, and beams.

An interaxle differential is also installed on the middle axle. This device distributes traction forces to each axle, and equipped with a built-in blocker, it allows you to increase the vehicle's maneuverability in off-road conditions.

The middle axle gearbox, like any equipment, fails from long-term use and for other reasons.

How much does the Kamaz rear gearbox weigh?

Taking into account the transport container, the weight of the gearbox is: - on the front axle - 132 kg; - medium - 186 kg; — rear – 145 kg.

How much does the Kamaz rear axle gearbox weigh?

the rear axle gearbox weighs 140 kg, volume - 0.097 m³; middle bridge - 180 kg, volume - 0.24 m³.

How much does the rear axle of KamAZ 5320 weigh?

Height - 60 cm; Length - 202 cm. Weight - about 700 kg.

How much does the assembled Kamaz rear axle weigh?

How much does the rear axle of KamAZ 4310 weigh? The mass of the “dry” bridge assembly is about 550 kilograms. Inside the crankcase there are two axle shafts with 16 or 20 splines. Its second end is equipped with a flange with which the wheel hub is attached.

Which gearbox is better for Kamaz?

For vehicles without trailers, gearboxes with gear ratios of 6.53, 5.94 and 5.43 are more suitable, but for road trains it is better to purchase vehicles equipped with gearboxes with gear ratios of 7.22, 6.53 and 5.94.

How much does a Kamaz gearbox weigh?

KamAZ gearbox middle rear front

Taking into account the transport container, the weight of the gearbox is: - on the front axle - 132 kg; - medium - 186 kg; — rear – 145 kg.

How much does an average Kamaz axle weigh?

How much the average KamAZ 43118 axle weighs depends on the cost of the gear, as well as the presence or absence of ABS. Its weight is more than 650 kilograms. You can buy the KamAZ 43118 medium axle without leaving your computer monitor.

How much does the KamAZ 5320 bridge weigh?

Width - 75 cm; Height - 60 cm; Length - 212 cm. Weight - about 720 kg.

How much does a road bridge weigh?

Vehicle specifications

How much does a cast iron bridge weigh?

The length of the bridge span is 30.6 meters, the weight of the span is 384 tons. Nowadays, this structure is of great interest to travelers. Immediately after the opening of the bridge, crowds of people began to flock to Soda. Artists and musicians created on the bridge.

How much does the assembled Kamaz gearbox weigh?

Weight 121 kg; dimensions 0.49*0.51*0.50, total volume 0.131 m3; Warranty from 6 to 12 months; Applicability: KAMAZ 53212, 5320, 5410 and other car models, mainly manufactured before 2001.

How much does the front beam of the KamAZ 5320 weigh?

Front axle beam (5320-3001010-01) - in stock and on order. Weight - 76 kg.

How to remove the gearbox on a KamAZ?

Removing the gearbox occurs in several stages:

1. Drain the oil from the axles, as well as from the center differential;
2. Remove the installation bolts;
3. Remove the stoppers;
4. Bend down the locking plates;
5. Remove the bearing cap;
6. Unscrew the adjusting bolts;
7. Remove the differential;
8. Disconnect the flange by pulling the cotter pins out of the pins;

How many teeth are on the Kamaz 5511 gearbox?

Rear gearbox KAMAZ 55111

Most models were equipped with an aggregate unit from 5320 with 49 teeth and a gear ratio of 6.53.

How to find out the gear ratio of a Kamaz gearbox?

To determine the number of teeth of the driving and driven gears on KAMAZ gearboxes, special markings are used, stamped on the gearbox housing. The gear ratio is indicated there. On some truck models, the number of gear teeth is indicated in the cab under the speedometer.

How many teeth are on the Kamaz 65115 gearbox?

It gives high-speed properties to the car and is used on many modern equipment. It is good for use on prepared trails. The number of teeth is also always mentioned in the article, its ending is -60. For example, KAMAZ rear gearbox 46 teeth 65115-2402011-60, KAMAZ middle gearbox 46 teeth 65115-2502011-60.

Common equipment failures and defective parts

Most often, breakdowns occur when the flange on the gearbox is faulty, and the hub, shaft or drive seal also fails. If the outboard bearing is faulty, severe beating of the cardan device may occur. This leads to failure of the equipment flange and its deformation.

The gearbox will have to be repaired when the seals are worn out. In this case, it will be necessary to replace the failed gearbox part. One of the reasons why it is necessary to remove the gearbox is failed bearings. There are other parts and their breakdowns that will require major repairs:

• “killed crosspiece seats;
• knocked down splines;
• damaged gear teeth.

The guarantee of the quality of repair work is not so much the skill and skill of the auto mechanic, but reliable and high-quality spare parts and components. It is better to purchase a part for the device at a slightly higher price than to spend less money and spend more time replacing the intermediate gearbox.

Troubleshooting and troubleshooting

What you should pay attention to when operating a car, what signs indicate a breakdown and require gearbox repair:

• The appearance of a metallic grinding, crunching sound. These unpleasant sounds occur when the car accelerates, accelerates, or under any load;
• Upon inspection we see oil leaks. As a rule, this symptom occurs when there is overflow or lack of oil in the gearbox;
• When driving, various noises arise, howling or the car hums loudly.

Let's look at what these symptoms tell us. Finding and replacing a faulty part is not an easy task and requires knowledge. I didn’t just remove and replace the defective part. You need to have devices and equipment for pressing out bearings and gears and other special tools.

Carrying out routine and repair work

Remove the middle axle gearbox and drain the oil from it. Disassemble the main components, rinse with kerosene or diesel fuel. Then inspect all spare parts and perform troubleshooting. Identify the parts that scream “replace.” First of all, pay attention to the condition of the gearbox housing. Then inspect the components and identify parts that require replacement or debugging.

The occurrence of bridge overheating

There are three reasons for this failure:

Occurs when the oil level in the middle axle gearbox is high or low. It's easy to fix - you just need to bring the lubricant level to normal.

It often occurs due to poor-quality adjustment of the gaps on the gears.

If the ball bearings are too tight, adjustment will help fix it.

Extraneous noises when driving

There was a problem in the operation of the bevel gear due to a change in the gap. By adjusting the position of the gears, we get rid of the breakdown.

One of the tapered bearings may have failed. This leads to disruption of regulations. Repair - adjust or replace one of the bearings.

The teeth on the gears may have broken. Gears with a large number of broken teeth must be replaced and the gaps between them adjusted.

The gearbox is noisy when turning

In this case, gearbox repair must begin with the differential; it must be dismantled, the cause of the malfunction must be determined, and the part must be replaced. After this, we assemble and adjust the device.

When engine oil is poured into the gearbox, noise also occurs during operation. In this case, you need to change the oil, after first washing all the parts and the body with diesel fuel or kerosene.

If oil leaks occur on the housing, the seals and gaskets at the leak site should be replaced.

Remember, it is easier to prevent a malfunction from occurring than to waste time and money on expensive repairs. If you carry out the simplest routine work on replacing and maintaining the oil level, timely repairs at the first noise in the gearbox, then the middle axle gearbox will not let you down on the road and will work for a long time and reliably.

If you have any questions, leave them in the comments below the article. We or our visitors will be happy to answer them

Best answer: How to find out the gear ratio of a Kamaz gearbox?

The gearbox has an information platform where data is entered. The following symbols are located on the information platform of the gearbox:

• Serial number
• Date of manufacture
• Gear ratio

The gear ratio is marked separately from the serial number and date of manufacture, and it is also encrypted inside the catalog number.

The gearbox serial number is a set of numbers and is simply a production numeric designation. For example, it looks like this: 000137

The gear ratio is indicated on the gearbox without a dot: 722

Types of KAMAZ gearbox flanges

One of the distinctive features of the gearbox is the cardan flange, which secures the gearbox to the cardan shaft.

Older car models were equipped with gearboxes with square flanges.

Modern models are equipped with round flanges with splines on the mating surface and axle gears. The popular name for the round flange is “Euro”

Splines are mounting slots through which the gearbox is bolted to the driveshaft.

Axle shaft gears are a block of gears into which the axle shafts are inserted directly, transmitting torque to the wheels of the vehicle. 16-spline axle gears were used on older models 5320, 5511, 55102, 5410, 53212.

Modern KAMAZ trucks are equipped with axle shaft gears with 20 splines, and some axle shafts are equipped with additional splines for inter-wheel locking (IBL).

Medium gearboxes

They are found on all kinds of KAMAZ vehicles, with wheel formulas 6x6, 6x4, 8x4. On an all-terrain vehicle there is a modification without an MOD (center differential).

• square flange, for axle shaft 16
• round euro flange, for axle shaft 20
• presence and absence of center differential (MOD)
• Possibility of connecting inter-axle locking

Number of teeth: 31, 35, 46, 47, 48, 49, 50.

Applicability to dump trucks (20 tons): 5511, 6520, 6522 20 ton, 5511, 55111 dump truck, 65111, 65115 euro 3 (euro 5), 65201, 65206, 65221 batyr, 65222, 65225.

Onboard and truck cranes: 45143, 5320, 5410 old model, 53212, 53213, 53215 onboard, 53228 truck crane, 53229, 54115, 55102 agricultural worker, 65116, 65117.

Determining the number of teeth of the KamAZ gearbox

To determine the number of teeth of the driving and driven gears on KAMAZ gearboxes, special markings are used, stamped on the gearbox housing. The gear ratio is indicated there.

On some truck models, the number of gear teeth is indicated in the cab under the speedometer.

Basic configurations

Determine the number of gear teeth using the last digits of the gearbox catalog code. You can also count the number of teeth on the main gear by hand.

If you bought a self-assembled/remanufactured KAMAZ gearbox, then the markings of KAMAZ gearboxes may not correspond to reality! It's better to count manually.