Description

Yuchai YC6108G 2008 Parts Catalog – Factory Parts Breakdown for the B7656

I have been wrenching on diesels for 28 years. If you are ordering parts for a Yuchai YC6108G, you want the factory Parts Catalog. Not a reprint, not a scan of a scan. The 2008 edition from Guangxi Yuchai Machinery Co., Ltd. is 72 pages of exploded drawings and part numbers. No aftermarket shortcuts.

That is the difference between a correct rebuild and a parts runaround.

Yuchai YC6108G 2008 Parts Catalog – The 31 Section Breakdown

The table of contents lists 31 assemblies, each with a dedicated page. Starts with the Engine suspension assembly (J7106-1001000) and ends with the data plate (B7618-3904000). In between you get every major system: cylinder block, gear housing, cylinder head, piston connecting rod, crankshaft flywheel, camshaft, valve tappet, intake and exhaust pipes, oil sump, oil collector, oil pump, oil strainer, oil radiator, breather, dipstick, fuel tube assembly, injection pump, air filter, injectors, radiator hoses, water drain valve, thermostat, water pump, fan, flywheel housing, vacuum pump, alternator, starter. That covers Engine, Suspension, Cylinder, Crankshaft, Camshaft, Valve – every part you need. Each assembly has an exploded view with numbered callouts matching the part list.

Engine Suspension and Cylinder Block Assemblies (Page 3)

Page 3 lists the engine suspension assembly. The part number is J7106-1001000. For the block itself, it is B7656-1002000. If you need the gear housing, that is B8601-1002200. These numbers are the same ones Yuchai dealers use. When you walk into a parts counter with this catalog, you get the right piece.

Cylinder Head, Piston, and Crankshaft – Matching the 2008 Revision

Sections 4, 5, and 6 cover the cylinder head, piston connecting rod, and crankshaft flywheel. The cylinder head assembly (340-1003000) includes the head gasket, bolts, and cover. The piston connecting rod assembly (340-1004000) gives you the rod and pin. The crankshaft flywheel assembly (696-1005000) shows the flywheel and bolts. If your engine has a different casting date, the part number may differ. This catalog is for 2008 production. I have seen aftermarket books list a 2005 crankshaft as the same – it is not.

Is This a Repair Manual? Understanding the Scope

Let me be clear: this is a Parts Catalog, not a service manual. It does not include torque specs, clearances, or repair procedures. For that you need the factory service manual. But for ordering the correct components, this is the final word. Every assembly has an exploded diagram with callouts. If you need the oil pump subassembly, look at section 13 (B3000-1011010). If you need the thermostat, section 24 (340-1306000). This catalog gives you the part number. You still need to know how to install it.

Why Factory OEM Documentation Matters

I have been in this business long enough to know that the difference between a good rebuild and a headache is the part number. Aftermarket parts catalogs from third parties often combine multiple engine versions into one listing. They might list the same oil cooler for the YC6108G and the YC6108Q, but the bolt pattern is different by 2 millimeters. That is a leak you do not find until the engine is back in the chassis. This catalog from Yuchai is the original factory document used at the assembly plant. It matches the 2008 production drawings. When you order using these numbers, you get the correct component. That is worth the price of the access. Factory documentation like this is the standard in the Automotive Industry Overview for parts identification. Understanding the Internal Combustion Engine basics helps when interpreting the diagrams.

If you need other Yuchai catalogs, check the Yuchai YC4D Diesel Engine Parts Catalog 2005 or the Yuchai Diesel Engine Parts Catalog YC4112ZQ/Z,Q. For larger engines, the Parts Catalogue YC6M220G (M3020) Diesel Engine is also available.

Frequently Asked Questions

Can I use this catalog to order replacement parts for a YC6108G built in 2009?

No. This catalog covers the 2008 model year. Yuchai may have revised parts in later years. Always match the engine serial number.

What if I need a part that is not listed in the 31 assemblies?

The catalog covers all major engine assemblies. If the part is not listed, it may be a fastener or seal that is included in a subassembly. For example, the cylinder head assembly includes the head gasket and bolts. The oil pump subassembly includes the drive gear. If you still cannot find the part, check the corresponding service manual for supplementary parts. Also, Yuchai provides updates via technical bulletins. This catalog is based on June 2008 production drawings. If your engine has a later revision, contact a dealer. For other Yuchai models, see the related catalogs linked above.

If you work on these engines, having the factory parts breakdown saves you time and money. No guessing. Access the Factory Manual.