Cylinder Head 7247453 | Direct Fit for Kubota D902 Bobcat MT55 MT85

Cross-Reference Verified — Each Cylinder Head 7247453 undergoes dimensional mapping against Kubota D902 service manual tolerances before dispatch, eliminating trial-fitment surprises on Bobcat MT55 and MT85 machines.

Technical Specifications

Application Suitability

Why the Same Cylinder Head Number Ships in Multiple Variants

Variant differences within a single base number cause more fitment failures than outright wrong parts.

I have seen a Bobcat MT55 come into a workshop with a cylinder head that looked identical — same outer dimensions, same bolt pattern — yet the compression ratio was wrong. The Kubota D902 family has variant builds where combustion chamber volume shifts between production runs, and swapping the wrong variant leads to hard starting or detonation under load [NEED_CITE: Kubota D902 engine variant identification and combustion chamber volume differences]. Copied cross-reference tables between sellers often carry forward errors from one listing to the next, so a number that appears interchangeable may only fit a specific serial range.

This Cylinder Head 7247453 is mapped against known Kubota D902 and D902-E3B-BC-1 configurations. The superseded and alternate reference numbers — 7000463, 7247479, 7000464, 7247480 — are cross-referenced (for identification purposes) to confirm which serial ranges they cover, so the buyer knows exactly what lands on the block deck.

Engine Serial Range and Variant Confirmation

The Kubota D902 platform powers both the Bobcat MT55 and MT85, but the engine serial number determines which variant of Cylinder Head 7247453 fits. The D902-E3B-BC-1 introduces emissions-related changes that affect head gasket profile and coolant port alignment. We verify the serial range before confirming compatibility, rather than assuming all D902 heads are identical.

Interface Geometry and Mounting Surface Verification

The sealing surface flatness tolerance of ±0.02 mm ensures uniform clamping pressure across the MLS head gasket. Bolt pattern confirmation against the block deck is part of the pre-dispatch check — the fastener layout on Kubota D902 variants can differ in hole position by small margins that prevent proper torquing if the wrong head is fitted [NEED_CITE: cylinder head bolt pattern verification standards for compact diesel engines]. Coolant port geometry and exhaust manifold stud spacing are also measured, since even slight deviations cause gasket leaks that show up only after the engine reaches operating temperature.

Reading the Specifications That Matter on Site

The high-silicon aluminum alloy in T6 condition handles the thermal cycling typical of compact track loaders working in confined demolition sites, where heat soak is constant and cooling airflow is restricted. The induction-hardened valve seats at 45–48 HRC resist recession when running under sustained load — a common condition for MT85 units in quarry loading zones. The MLS head gasket with Viton-coated stopper layers maintains seal integrity through repeated heat cycles, outperforming composite gaskets in this application. Copper-coated exhaust manifold gaskets rated to 900°C prevent the blowout failures typical of standard graphite gaskets in high-exhaust-temperature conditions.

The Hidden Cost of a Close-Enough Fit

A cylinder head that bolts on but has the wrong combustion chamber volume creates problems that take weeks to diagnose — poor fuel economy, elevated exhaust temperatures, and eventual piston crown damage. The machine runs, so it stays in service, but the underlying mismatch accelerates wear across the entire top end. When the head finally comes back off, the repair bill includes pistons, rings, and valve train components that would not have needed replacement if the correct variant had been fitted the first time [NEED_CITE: cylinder head variant mismatch effects on compact diesel engine wear patterns]. Fitment certainty is cheaper than the second teardown.

Why Source This Cylinder Head Here

Our own production lines and qualified sourced supply carry the same QC and warranty terms — one account, one standard, whether the part is made in-house or sourced. The eight product categories we cover mean a complete top-end overhaul kit can ship as one consignment with the Cylinder Head 7247453, avoiding split deliveries. We accept orders from one piece, so a single emergency replacement is never blocked by minimum quantities. Identification is possible from a part number, machine model, or a photograph of a worn nameplate. Cross-reference verification covers superseded and alternate numbers, and a sample unit is available for physical fitment validation before any bulk commitment.

Documentation & Verification

• Commercial invoice and packing list itemizing cylinder head and gasket kit contents
• Part compatibility sheet listing verified Kubota D902 serial ranges and cross-reference numbers (reference only)
• Dimensional inspection record covering sealing surface flatness and port geometry
• Six-month warranty terms against manufacturing defects
• Packing photographs showing sealed box with anti-static foam and moisture barrier
• HS code and customs documentation support for international shipment

Fitment Check Before Installation

• Compare bolt pattern and hole spacing on the new Cylinder Head 7247453 against the removed unit or block deck
• Verify coolant port alignment and exhaust manifold stud positions before placing the MLS gasket
• Torque fasteners in the OEM-specified sequence using Grade 10.9 hardware included in the kit
• Confirm combustion chamber volume matches the engine build recorded on the serial plate
• If any dimension does not match, halt installation and contact the supplier for cross-reference re-check

Before You Send an Inquiry

Provide the Bobcat machine model, engine serial number, and any readable numbers from the old cylinder head or nameplate. If the plate is worn or painted over, a clear photograph of the engine block and existing head is enough for our team to verify fitment. For fleet buyers standardizing across MT55 and MT85 units, send the serial list so we can confirm variant coverage across your range and arrange a sample for first-article fitment validation.

Frequently Asked Questions

Q: How do I confirm this Cylinder Head 7247453 fits my exact Bobcat MT55 or MT85? A: Provide the machine model and engine serial number from the Kubota D902 nameplate. We cross-check the serial range against our fitment database, confirming bolt pattern, port geometry, and combustion chamber volume. If the nameplate is unreadable, a photograph of the existing head and block deck is sufficient for identification.

Q: What's the difference between the multiple gasket kit numbers listed? A: The alternate reference numbers 7000463, 7247479, 7000464, and 7247480 correspond to different production runs and engine serial ranges within the Kubota D902 family. Each may include slight differences in gasket profile or fastener hardware. We verify which number matches your specific engine build before confirming the kit contents.

Q: My old part number doesn't match — is there a superseded or alternate number? A: Kubota has superseded several cylinder head numbers across D902 production runs. Send us your existing number and engine serial, and we cross-reference against known supersessions. The numbers 7000463, 7247479, 7000464, and 7247480 are all mapped in our reference system for identification purposes.

Q: I only have the machine model, no readable part number — can you identify it? A: Yes. Share the Bobcat MT55 or MT85 model designation along with a photograph of the engine compartment and any visible casting numbers on the block or head. Our team uses the machine model and visual cues to narrow the engine variant and confirm the correct Cylinder Head 7247453 variant for your unit.

Q: Can I get a sample to verify fitment before committing to a bulk order? A: A single sample unit ships with full documentation so your workshop can perform a physical fitment check on one machine before you commit the rest of the fleet. This is standard practice for buyers managing mixed MT55 and MT85 units where serial ranges may span multiple D902 variants.