FIELD CASE STUDY|INDUSTRIAL RAIL TRANSPORT|DIESEL ENGINE · CYLINDER-PISTON GROUP · OIL AND FUEL SYSTEMS

REPORT ON MEASUREMENT OF ENGINE OPERATING PARAMETERS, 26.08.2008

TGM6A shunting locomotive: compression, oil pressure and vibration — without teardown

Kurganinsk branch of OAO MIR, Promzheldortrans transport company · measurements: health, safety and traffic safety engineer Yu. V. Zaika, lead engineer of XADO LLC I. N. Sharaykin · approved by branch director V. P. Surmilo

Krasnodar Territory, Kurganinsk District, Russia · work carried out 4 June — 26 August 2008 · report dated 26.08.2008

PRODUCTXADO revitalizant compoundsfull treatment cycle: engine · oil system · fuel system

TEST SUBJECTTGM6A shunting locomotive No. 2059eight-cylinder diesel engine, 22 314 h of service at the start of the work

DOCUMENT TYPEReport on measurement of
engine operating parametersapproved by the branch director, round company seal

Key results

↑4-21%

compression across the cylinders at 360 rpm, 19-25 → 21-27 kgf/cm²

↓20-47%

vibration velocity of the engine block, 2.91-8.29 → 1.56-6.81 mm/s

↑33-40%

oil pressure in the lubrication system, 1.8-3.6 → 2.4-4.9 kgf/cm²

EQUIPMENT	CONDITION AT THE START OF THE WORK	WHAT WAS MEASURED
TGM6A shunting locomotive No. 2059, eight-cylinder diesel engine	22 314 h of service, machine built in 1985	Compression and peak combustion pressure in all eight cylinders at 360, 480 and 700 rpm; oil pressure at the same speeds; block vibration at six points on each side

Compression by cylinder at three engine speeds, kgf/cm²

CYLINDER	360 RPM	480 RPM	700 RPM
I · left	20 → 21	24 → 25	24 → 26
II · left	23 → 24	23 → 25	24 → 26
III · left	23 → 24	24 → 25	24 → 26
IV · left	21 → 24	22 → 25	24 → 26
V · right	24 → 25	25 → 26	25 → 26
VI · right	25 → 26	28 → 29	30 → 31
VII · right	24 → 27	26 → 28	27 → 29
VIII · right	19 → 23	26 → 28	30 → 32

The most worn cylinders gained the most: VIII (19 → 23) and IV (21 → 24) at 360 rpm. Compression rises towards the factory nominal value and levels off against it.

Peak combustion pressure by cylinder, kgf/cm²

CYLINDER	360 RPM	480 RPM	700 RPM
I · left	32 → 34	26 → 30	32 → 34
II · left	28 → 30	23 → 29	32 → 36
III · left	40 → 42	38 → 40	36 → 38
IV · left	36 → 38	38 → 40	37 → 40
V · right	41 → 43	36 → 37	36 → 37
VI · right	36 → 42	30 → 40	33 → 43
VII · right	32 → 35	36 → 37	40 → 42
VIII · right	24 → 33	23 → 34	26 → 36

According to the conclusions of the report, peak combustion pressure increased in every cylinder of the engine by 1-10 kgf/cm².

Vibration velocity of the engine block, mm/s

MEASUREMENT POINT ON THE BLOCK	LEFT SIDE	RIGHT SIDE
1 · vertical, front end	3.33 → 2.68	3.6 → 2.75
2 · horizontal, front end	5.71 → 3.82	4.91 → 2.79
3 · axial direction, front end	3.94 → 1.56	3.13 → 2.18
4 · vertical, rear end	4.32 → 2.19	2.91 → 1.74
5 · horizontal, rear end	4.72 → 4.67	8.29 → 6.81
6 · axial direction, rear end	2.93 → 1.56	3.34 → 2.78

Vibration velocity, mm/s, at six points on each side of the block. A reduction was recorded at all twelve; vibration acceleration at the same points fell by 10-76 %.

Oil pressure in the lubrication system

ENGINE SPEED	OIL PRESSURE, KGF/CM²	CHANGE
360 rpm	1.8 → 2.4	+33 %
480 rpm	2.5 → 3.5	+40 %
700 rpm	3.6 → 4.9	+36 %

Measurements before and after treatment were taken at the same oil temperature of 70 °C. According to the conclusions of the report, pressure increased by 0.6-1.3 kgf/cm².

Conclusions of the company commission

The commission of the Kurganinsk branch of OAO MIR, Promzheldortrans transport company, recorded in the report of 26.08.2008: «after the full treatment cycle and a total of 518 hours of engine service, the maximum compression pressure evened out across all cylinders and increased by 1-4 kgf/cm², and the peak combustion pressure increased in every cylinder of the engine by 1-10 kgf/cm²»; «as a result of treating the engine oil system with XADO revitalizant compounds, oil pressure increased at various engine speeds by 0.6-1.3 kgf/cm²»; «the peak combustion pressure stabilised in cylinders II, VI and VII» — before treatment the combustion pressure in these three cylinders drifted over time by 2-4 kgf/cm². The commission's forecast: the improvement in operating parameters «will make it possible to extend its service life until major overhaul by not less than 1.5×».

The results apply to TGM6A shunting locomotive No. 2059 and its diesel engine at the stated hours of service and measurement conditions; on other equipment and under other operating conditions the figures may differ. The original report of 26.08.2008 bearing the signatures and the company seal is published in full and available for download.

Current equivalent

Revitalizant gel for cylinder restorationEngine cylinders, deep wear
Revitalizant gel for diesel enginesDiesel engines

How such units are treated: Cylinder-piston group Diesel engine

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