KRAZ, KamAZ, YuMZ-6 diesels: compression and oil pressure rose on every machine

Compression rose and evened out across the cylinders on every machine, oil pressure rose at idle and under load. Russia · 2001. 14-22 % — cylinder compression.

Tatneft JSC, Almetyevneft oil and gas production division (NGDU), Almetyevsk Transport Department No. 1 (AUTT-1) · measurements witnessed by the AUTT-1 engineering department, treatment performed by Al-XADO LLC

Almetyevsk, Republic of Tatarstan, Russia · measurements 4.09.2001 and 9.11.2001 · contract No. 15 of 23.08.2001

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: Diesel engine Cylinder-piston group

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