IE S005SIX TECHNICAL ACTS · 4 SEPTEMBER — 9 NOVEMBER 2001
KRAZ, KamAZ, YuMZ-6 diesels: compression and oil pressure rose on every machine
Compression increased and evened out across cylinders, oil pressure rose on every vehicle in the fleet. 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 (2001).
What repeated on every machine of the series
| 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
Current equivalent
- Revitalizant gel for diesel enginesDiesel engines
- Revitalizant gel for cylinder restorationEngine cylinders, deep wear
How such units are treated:
About this result:
Limits of this report: 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.