ChME3 ball supports: clearance to gauge smaller, on the control one — larger

Clearance to the gauge closed up on every treated support, while the untreated control one opened wider. Ukraine · 2003. 0.04-0.07 mm, 0.08-0.1 mm.

Main Locomotive Department of Ukrzaliznytsia, Dnipropetrovsk locomotive depot of the Prydniprovska Railway · measurements certified by the depot commission: chief engineer V. N. Vsevolodsky, chief technologist G. P. Zaivyi, deputy head of the depot for repairs S. V. Shestirublev

Dnipropetrovsk, Ukraine · treatment 22.04.2002 — 15.01.2003 · measurements 18.09.2003 — 02.12.2003

PRODUCTXADO greases“restorative” and “protective” · three injections of 0.33 kg per unit, by grease gun over the standard ZhRO grease

TEST OBJECTBody ball supports
of ChME3 shunting locomotivesspherical support washer · locomotive works No. 1736, No. 3825, No. 7218 of the same depot

DOCUMENT TYPEUnit treatment passports
under XADO technologysigned by a XADO representative and three depot officials, two stamps

What recurred on every locomotive

↓0.04-0.07mm

clearance to gauge on the treated supports, single maximum 0.65 mm

↑0.08-0.1mm

clearance on the control support without XADO, 0.3-0.32 → 0.38-0.42 mm

LOCOMOTIVE	BODY SUPPORTS, LEFT SIDE	MILEAGE AFTER TREATMENT	MEASUREMENTS
ChME3 works No. 1736	Front and rear — treated	55 542 km	18.09.2003
ChME3 works No. 3825	Front and rear — treated	55 380 km	24.10.2003
ChME3 works No. 7218	Front — treated; rear left as control, without XADO grease	54 457 km	02.12.2003

Clearance to the R110 gauge — before treatment and after mileage

LOCOMOTIVE	BODY SUPPORT	BEFORE TREATMENT, mm	AFTER MILEAGE, mm
ChME3 No. 1736	Front left (post No. 1)	0.9-0.1	0.83-0.06
ChME3 No. 1736	Rear left (post No. 4)	0.22-0.25	0.16-0.20
ChME3 No. 3825	Front left	0.2-0.22	0.14-0.18
ChME3 No. 3825	Rear left	0.1-0.12	0.06-0.07
ChME3 No. 7218	Front left	1.45-1.5	0.8-0.85
ChME3 No. 7218	Rear left — control, without XADO grease	0.3-0.32	0.38-0.42

Clearance between the R110 ± 0.1 mm gauge and the working surface of the spherical washer; the range is the spread across measuring points. The control support ran the same mileage on the same machine.

Conclusion of the depot commission

The commission of the Dnipropetrovsk depot recorded the same thing in three passports: after the XADO greases were introduced and a mileage of over 54 000 km was run, the clearances between the gauge and the working surface of the spherical support washer decreased, while "the working surfaces of the ball supports acquired the look of a smooth polished surface, the traces of micro-damage present on the working surfaces disappeared". The supports went into service already worn: on locomotive No. 7218 the clearance reached 1.5 mm, and after the mileage it was 0.8-0.85 mm. On the same machine the rear left support was left as a control, without XADO grease: over the same mileage its clearance, on the contrary, grew by 0.08-0.1 mm — the metal kept wearing away exactly where XADO was not introduced. According to the conclusions of the certificates, this "confirms the effectiveness of using XADO greases for the purpose of eliminating wear of the body ball supports and makes it possible to increase the service life of these units by 1.5 - 2×".

The results relate to the body ball supports of ChME3 shunting locomotives operated by the Dnipropetrovsk locomotive depot; on other units and under other operating conditions the figures may differ. The original treatment passports with signatures and stamps are published in full and available for download.

Current equivalent

XADO “Restorative” grease →

Bearing assemblies on consistent grease, ball joints and friction pairs — where there is no oil bath to dose a gel into.

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