5I7523 5I-7523 Caterpillar 3064 3066 S6KT Engine Spare Parts Cylinder liner

5I7523 5I-7523 Cylinder Liner for Caterpillar 3064 3066 S6KT Engine Repair

The 5I7523 5I-7523 cylinder liner is used for Caterpillar compact and mid-size diesel engine repair, especially engine families such as 3064 3066 C4.2 C6.4 S6KT. It is commonly ordered by excavator repair shops when the old sleeve shows bore wear, scoring, piston scuffing, low compression or abnormal oil consumption.

This page is focused on the 5I7523 liner only. Older Caterpillar excavators and Mitsubishi-based engine references may share similar search terms, so the removed sleeve, engine model and physical dimensions should be checked before shipment.

Product Identification for 5I7523 5I-7523

Application Scene: Excavator Workshop Engine Repair

The 5I7523 liner is usually not purchased as a general catalog item. It is often ordered during workshop repair of Caterpillar excavator engines when the machine has long operating hours, poor starting, blue smoke, oil consumption, piston ring failure or visible cylinder wall damage.

For repair shops handling Caterpillar 311, 312, 320 and related machines, the key point is to confirm the actual engine installed in the machine. Many used excavators have engine replacement or previous rebuild history, so machine model alone is not enough.

If the machine is working in demolition, quarry, municipal repair or rental fleet service, liner wear may be accelerated by dust ingestion, overheating, poor cooling maintenance or delayed oil service. The full failure background should be checked before replacing only the liner.

Why Semi-Finished Sleeve Status Matters

Some market references describe 5I7523 as a semi-finished or raw straight sleeve. This means the workshop should confirm whether boring, pressing, honing or final machining is required after installation.

If a semi-finished liner is installed without correct machining, the piston clearance, ring sealing surface and bore roundness may not meet the rebuild requirement. This can lead to early oil consumption, low compression, piston scuffing or repeated overhaul failure.

Before ordering, buyers should tell Topvelsun whether they need a finished sleeve, semi-finished sleeve, bare liner or a liner set. This avoids shipment of the correct number but wrong supply type.

When to Replace the 5I7523 Cylinder Liner

Pre-Order Verification Checklist

Before ordering 5I7523 5I-7523, confirm the engine model, machine model, removed liner number, sleeve type and physical dimensions. The key measurements include bore, outer diameter, total length, wall thickness and top edge design.

If the old liner is available, send photos of the removed sleeve, engine nameplate and dimension measurements. If the cylinder block has been machined before, provide the block bore measurement and rebuild history as well.

For mixed Caterpillar and Mitsubishi engine references, the safest method is to compare the old sleeve directly instead of relying only on the equipment model or translated engine name.

Installation and Machining Notes

Clean the cylinder block bore before liner installation. Rust, burrs, carbon deposits or old machining marks can affect sleeve seating and final bore accuracy.

If the liner is semi-finished, final boring and honing should be completed according to the rebuild specification. The mechanic should check bore size, roundness, taper, surface finish and piston-to-liner clearance before final assembly.

After assembly, monitor oil consumption, exhaust smoke, crankcase pressure, coolant temperature and starting condition during the first operating period.

If early smoke or low compression appears after rebuild, inspect machining quality, piston rings, air intake dust source, injector condition and cooling system before assuming the liner is the only cause.

Why Source 5I7523 5I-7523 from Topvelsun?

Topvelsun supplies replacement engine parts for excavator repair shops, fleet service teams, used equipment rebuilders and parts distributors. For 5I7523 5I-7523 orders, we help buyers compare the engine reference, old sleeve photos and key dimensions before shipment.

This product is suitable for Caterpillar excavator engine repair, workshop rebuild stock and remote buyers who need a practical cylinder liner reference for 3064 3066 C4.2 C6.4 S6KT engine service.

FAQ

What engine is 5I7523 mainly used for?

5I7523 is commonly listed for Caterpillar 3064, 3066, C4.2 and C6.4 engine references. Some market listings also connect it with S6KT-related engine searches. Final fitment should be verified by old sleeve and dimensions.

Is 5I-7523 the same search format as 5I7523?

Yes. 5I-7523 and 5I7523 are commonly used as hyphenated and non-hyphenated search formats for the same liner reference. The physical sleeve type should still be checked before ordering.

Why do some sources show slightly different dimensions?

Some catalogs list 101.6 mm bore and 195 mm length, while others list 102 mm diameter and 197 mm length. This can come from measuring method, machining status or catalog format. Buyers should measure the removed sleeve before ordering.

Is this liner only for excavators?

It is often ordered for Caterpillar excavator engine repair, but the final match depends on the engine model and removed sleeve. Do not rely on machine category alone.

Can Topvelsun help confirm the correct liner before shipment?

Yes. Buyers can send the old liner photos, engine nameplate, machine model and measurement photos. Topvelsun can help compare the information before order confirmation.