Product Details
Blogs List
How to Find the Best Allison Transmission ...
2025-11-05 Comments Off on How to Find the Best Allison Transmission Spare Parts Supplier in China?Need More Information?
We’re happy to help you find the best option for your application.
4934860 XCMG GR2605 motor grader piston
– Part Number: 4934860 (C4934860)
– Description: ENGINE PISTON (STD)
– Cross Reference: 4955160, 3975868, 5295571
– Material: High-silicon aluminum alloy
– Bore: 107mm (Standard)
Share:
Product Details:
4934860 XCMG GR2605 motor grader piston
4934860 (C4934860) is a genuine Cummins standard-size piston for QSB6.7 and ISB6.7 electronic diesel engines. Made of high-silicon aluminum alloy with oil cooling gallery, designed for high combustion pressure and durability in construction, truck, and generator applications.
Technical Parameters
– Part Number: 4934860 (C4934860)
– Description: ENGINE PISTON (STD)
– Cross Reference: 4955160, 3975868, 5295571
– Material: High-silicon aluminum alloy
– Bore: 107mm (Standard)
– Ring Grooves: 3 (2 compression, 1 oil)
– Pin Diameter: 35mm
– Compression Height: Approx. 70mm
– Combustion Bowl: ω-type (direct injection)
– Cooling: Internal oil gallery (jet-cooled)
– Displacement: 6.7L
– Weight: Approx. 1.4kg
– Standards: Cummins OEM, ISO 9001, TS16949
Application
Applicable Engines
– Cummins QSB6.7 (6D107)
– Cummins ISB6.7
– Komatsu SAA6D107E-1 (PC200-8/220-8)
Equipment
– Excavators: Komatsu PC200-8, PC220-8, Hyundai R290LC-9
– Loaders: Hyundai HL730-7A/9, HL740-7A/9
– Trucks: Dongfeng Kinland, Foton Aumark (ISB/QSB6.7)
– Gensets: 150–200kW Cummins units
– Forklifts: Hyundai 110D-7E
Mounting Location
Installed in engine cylinder liner, assembled with connecting rod, pin, and rings. Crown forms combustion chamber; skirt guides; grooves seal gas and oil.
Installation & Maintenance
1. Clearance: Bore 107.00–107.03mm; skirt 106.95–106.98mm; gap 0.02–0.05mm
2. Rings: End gap 0.25–0.45mm; stagger gaps 120°; install oil ring spacer first
3. Pin: Fit clearance 0.005–0.015mm; press fit or cryogenic assembly
4. Lube: Coat skirt, grooves, pin with clean engine oil
5. Orientation: Bowl/arrow points to front (opposite flywheel)
6. Break-in: Idle–medium run 30min; no full load
Get a personalized quote now
1 C3792214 Turbocharger
2 C3818823 Double-ended studs
3 C3818824 Hexagonal flange nuts
4 C391936 Turbocharger gaskets
*For other spare parts procurement needs, please contact us!
