1I37E Check & Test Vehicle (CTV) provides:
- maintenance and service of artillery guns, fire control systems (FCS) and guided weapon control systems installed on Т-72 / Т-80 / Т-90 tanks and 2S25 SP anti-tank weapon. Maintenance is performed with the use of instrumental control methods and special tools and equipment;
- technical preparation of tank and AT guns for fire including the operations of sight adjustment and gun zeroing / dry-zeroing;
- ballistic preparation for fire including the calculation of V0 corrections to ammunition batch and barrel bore wear;
- barrel-bore cleaning to remove fouling, old grease, contamination and rust;
- operations log and printing of reports;
- training the personnel to conduct tank armament maintenance, technical and ballistic preparation for fire, CTV maintenance.

Main technical data


Set-up/ tear-down time

max 60 / 30 min

CTV run time

8 hr



Power supply

external or self-contained power supply

Operating mode

8-hour run / 1-hour intermittence

Operating conditions (Barrel-Bore Cleaning Machine):
- ambient temperature
- relative humidity
- atmospheric pressure

up -50 to +50°С
98 % @ +25 °С
450 to 780 mm Hg

External power supply voltage

~380 V

Power consumption of CTV equipment

min 12 kW

Dimensions in travelling position (L x W x H)

9830 mm х 2580 mm х 3390 mm


12550 kg

Special Software

Installed on a notebook

Barrel-Bore Cleaning Mechanism

Mechanized cleaning of 100mm tank gun barrel bore both in workshop and field conditions

CTV 1I37E comprises:
- a van-body on Ural-4320 high-mobility chassis;
- an On-board Information Measuring & Control System (OBIMCS) that comprises a control unit (CU-38), an instrumentation for measuring the barrel-bore axis misalignment, muzzle velocity and muzzle angle, a sight adjustment instrument, printer and special software;
- a barrel bore cleaning mechanism;
- instrumentation, tools and equipment for zeroing, maintenance and routine repair of tank and AT guns, sights, stabilizers and fire control systems;
- check and test equipment for Guided Weapon System maintenance and routine repair;
- power supply, communication and life-support systems.

Check and Test Vehicle is based on Ural-4320 cross-country six-wheel chassis with a high-performance low-consumption engine. Another cross-country chassis of similar type may be provided at customers’ request.
Gun zeroing is the main operation of tank guns preparation for fire. It includes the following activities:
- aligning the line of sight with the gun barrel-bore axis;
- measuring the projectile jump angles that are individual for every gun;
- applying the corrections for individual jump angles into the tank Fire Control System;
- changing the position of hairline marks on the gun muzzle end.
Neglecting or averaged approximation allowance for these corrections leads to significant reduction in accuracy. There are two methods of gun zeroing: a conventional firing method and a unique non-firing method that enables to define the projectile jump angle corrections based on the barrel axis measurements.
In the process of non-firing zeroing, 1I37E CTV measures the muzzle angle and the barrel axis non-linearity error (using a PINT instrument). The measured parameters are used by the OBIMCS program to calculate:
- the barrel individual jump angle for each projectile type and index;
- the corresponding corrections that are input into the tank FCS during the gun aiming;
- the interval of shifting the hairline marks on the gun muzzle end.
The accuracy of the calculated results is as good as the accuracy achieved by the conventional firing method. But the non-firing method requires no projectile firing thus saving both money and barrel life.
The capability of non-firing zeroing provided by CTV is unique and has no counterparts worldwide.
At the same time, CTV provides the capability to prepare guns for fire with the use of conventional firing technique (the so called adjustment of fire) that involves firing a number of projectiles at an adjustment target to define the individual jump angles.
1I37E CTV provides the following advantages:
- increase of gun combat readiness by 2 – 2.5 times due to the reduction of time required to transfer the artillery system to combat-ready status;
- accuracy improvement by 1.3 – 1.5 times due to better set-up parameters and allowance for corrections calculated for individual jump angle for each projectile type;
- the capability of field adjustment of artillery weapon systems to the level of newly manufactured or factory adjusted systems;
- saving the barrel life and reducing money, time and labor expenditures due to the unique method of non-firing zeroing. CTV also provides the capability to automatically perform maintenance and service operations which can be done by a well-trained CTV crew.


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