CASE SERIES|OIL & GAS · ROAD TRANSPORT|DIESEL ENGINES
SIX TECHNICAL ACTS · 4 SEPTEMBER — 9 NOVEMBER 2001
series of 6 acts
KRAZ, KamAZ, YuMZ-6 diesels: compression and oil pressure rose on every machine
PRODUCTTreatment by XADO technologyno engine disassembly, the machines stayed in service
TEST OBJECTDiesel engines of six machinesKamAZ-5320 · KRAZ-250 · KRAZ-260 · KRAZ-25551 · KRAZ-65101 · YuMZ-6 tractor excavator
CUSTOMER’S CONCLUSION“I consider the use of XADO technology for restoring worn mechanisms under normal operating conditions expedient when 25-75 % of the engine service life is used up and there are no oil leaks”S. A. Brusov, Head of Vehicle Operations, AUTT-1, Almetyevneft NGDU, 4.09.2001, contract No. 15 of 23.08.2001
What repeated on every machine of the series
↑14-22%
cylinder compression, 17-27.7 → 22-30 kgf/cm²
↑11-33%
oil pressure at 2000 rpm, 2-6 → 4-7.1 kgf/cm²
| MACHINE | PLATE No. | YEAR | ODOMETER AT START | RUN OVER THE CYCLE |
|---|---|---|---|---|
| KamAZ-5320 | V 855 OR | 1993 | 109 951 km | 10 154 km |
| KRAZ-250 | V 481AN | 1993 | 89 875 km | 3 895 km |
| KRAZ-65101 | V 468RO | 1995 | 41 960 km | 2 350 km |
| KRAZ-260 | 63-07 TTV | 1996 | 14 274 km | 1 456 km |
| KRAZ-25551 | 65-84 TTV | 1993 | 10 275 km | 2 036 km |
| YuMZ-6 tractor excavator | 57-41 TS | 1992 | — | 390 engine-h |
Cylinder compression — machine by machine
| MACHINE | BEFORE TREATMENT | AFTER TREATMENT | AVERAGE GAIN |
|---|---|---|---|
| KamAZ-5320, V 855 OR | 23.0-23.4 | 27.0-30.0 | 22.3 % |
| KRAZ-250, V 481AN | 23.7-25.1 | 28.0-29.0 | 16.8 % |
| KRAZ-65101, V 468RO | 24.0-25.0 | 28.0 | 14.3 % |
| KRAZ-260, 63-07 TTV | 23.0-24.0 | 27.9-28.3 | 20.1 % |
| KRAZ-25551, 65-84 TTV | 27.0-27.7 | 28.9-29.1 | 6 % |
| YuMZ-6, 57-41 TS | 17.0-17.5 | 22.0 | 27.53 % |
Compression in kgf/cm²; the average gain is taken from the “Results” section of each act. The lower the initial compression, the larger the gain: growth is capped by the factory nominal.
Oil pressure at an engine temperature of 60 °C
| MACHINE | IDLE SPEED | 2000 RPM |
|---|---|---|
| KamAZ-5320, V 855 OR | 1.5 → 2.5 | 2.0 → 4.0 |
| KRAZ-250, V 481AN | 5.5 → 6.2 | 6.0 → 7.1 |
| KRAZ-65101, V 468RO | 2.5 → 4.0 | 4.5 → 5.0 |
| KRAZ-260, 63-07 TTV | 2.0 → 4.0 | 4.5 → 6.0 |
| KRAZ-25551, 65-84 TTV | 3.5 → 6.0 | 6.0 → 7.0 |
| YuMZ-6, 57-41 TS | 1.0 → 2.5 | 2.0 → 4.0 |
Pressure in kgf/cm². The increase was recorded on all six machines and in both modes — at idle and under load.
What the acts recorded
The acts of Almetyevsk UTT-1 record the same thing for every machine: “Compression increased by an average of 16.8 %, evened out across the cylinders. Oil pressure increased” — so for KRAZ-250, and likewise for the other five, from 6 to 27.53 %. On not a single machine did compression stay the same, and on not a single one did oil pressure drop. All six engines completed the cycle in regular service, without disassembly and without taking the machines out of work: between the measurements the vehicles covered from 1 456 to 10 154 km, and the tractor excavator 390 engine hours. For the KamAZ-5320 the act adds a service observation: “According to the driver the truck became more powerful; previously a hill climb was managed in 3rd gear with difficulty, now it climbs easily in 4th”. Following the work, the customer recognised the use of the technology as expedient at 25-75 % of engine service life used up.
The results refer to the diesel engines of KRAZ and KamAZ trucks and a YuMZ-6 tractor excavator under the operating conditions of Almetyevsk UTT-1; on other equipment and in other duty cycles the figures may differ. The originals of all six technical acts, with signatures and stamps, are published in full and available for download.
Current equivalent
- Revitalizant gel for diesel enginesDiesel engines
- Revitalizant gel for cylinder restorationEngine cylinders, deep wear
How such units are treated: