Starter Motor 12V 2.2KW 6670727 | Overhaul Grade for Bobcat Excavator

Fleet Stocking Strategy — We map 6670727 starter consumption against Bobcat E-series service intervals so rental fleets keep the right quantity on the shelf before cold mornings expose a gap in the plan.

Technical Specifications

Application Suitability

When a Starter Motor Becomes a Fleet Planning Problem

Most compact excavator fleets treat the starter motor as a run-to-failure item, which means the first warning is a machine that will not crank on a Monday morning with a concrete pour scheduled. Planning the Starter Motor service part maintenance replacement as a scheduled event removes the emergency premium and the idle crew.

In mining and quarry environments where Bobcat E35 and E50 units cycle through multiple cold starts daily, I have watched carbon brushes wear to the nub while the maintenance team focused on hydraulic leaks and track tension. The starter draws increasing current as internal resistance climbs, quietly stressing the battery and alternator until the entire cranking circuit fails at once. Fleet managers who wait for complete failure end up replacing three components where one planned swap would have sufficed. [NEED_CITE: SAE J1171 electrical component durability standards for off-highway equipment]

Where This Starter Sits in the Ownership Lifecycle

The 2.2 kW output and 10-tooth pinion place this Starter Motor service part maintenance replacement squarely in the compact excavator and small loader segment where engine displacement is modest but start frequency is high. Machines like the Bobcat E35 and S100 loader may see dozens of starts per shift in rental or demolition applications, accelerating brush and solenoid wear well before the engine itself reaches mid-life overhaul intervals. Recognizing this component as a predictable-consumption item rather than a surprise failure lets you align its replacement with other scheduled maintenance windows.

Reading the Warning Signs Before the Machine Goes Silent

Slower cranking speed is the earliest reliable indicator, often dismissed as cold-weather sluggishness or a weak battery. A healthy 12 V starter in this power class should spin the engine at a consistent cadence; any noticeable hesitation points to brush wear or increased internal resistance. Intermittent engagement — where the solenoid clicks but the pinion does not always mesh with the ring gear — signals that the throw mechanism is nearing end-of-life. Ignoring these symptoms means the next failure will occur under load, on a job site, with no spare on hand. [NEED_CITE: preventive maintenance scheduling frameworks for compact excavator electrical systems]

Understanding the 2.2 kW and 10-Tooth Specification

The 2.2 kW rating delivers sufficient torque to crank the smaller diesel engines found in Bobcat E25 through E55 excavators without overloading the 12 V electrical architecture. A higher-wattage unit would draw excessive current through wiring harnesses not designed for it, while a lower output would struggle in cold conditions. The 10-tooth pinion must match the ring gear module precisely; a mismatch causes partial engagement, accelerated gear wear, and eventual tooth shear. Clockwise rotation is standard for this engine family, and substituting a counter-clockwise unit would render the machine unstartable. The SAE J1171 qualification ensures the motor withstands the vibration and moisture ingress typical of excavator engine bays.

The Compounding Cost of Reactive Starter Replacement

A fleet that replaces starters only after failure accumulates hidden costs: the machine sits idle while the part is sourced, the battery has likely been damaged by repeated low-voltage cranking attempts, and the ring gear may show impact damage from a failing pinion. I have seen a single skipped inspection lead to a secondary failure where the worn pinion chipped two ring gear teeth, converting a straightforward starter swap into a flywheel housing teardown. Reaction-based procurement also means paying expedited freight and accepting whatever variant a supplier has available rather than the correct one for your serial range. [NEED_CITE: total cost of unplanned downtime in compact equipment fleet operations]

Why Fleet Operators Source This Starter Through Our Account

Own production on selected electrical lines and qualified sourced supply share the same QC protocol and warranty terms, so you do not need to track which batch came from where. Eight product categories under one account means the starter, the associated battery terminals, the replacement solenoid contacts, and the ring gear inspection tool all ship in a single consignment. Minimum order is one piece, so a rental depot can stock a single spare for its E35 fleet without committing to a pallet. Our Guangzhou warehouse holds stock on high-turnover items for fast dispatch when a machine is already down. Cross-reference verification covers superseded numbers like SND0408 and the Denso 228000 series variants, catching interchange errors before they reach your dock. Technical staff confirm serial-range compatibility when machine generations overlap on the same base part number.

Documentation & Verification

• Commercial invoice listing 6670727 with HS code for customs clearance
• Cross-reference sheet mapping OEM numbers as reference only against your serial range
• Dimensional inspection record covering pinion tooth profile and mounting bolt pattern
• Warranty card stating coverage period and manufacturing-defect claim procedure
• Packing photograph showing anti-static foam and reinforced carton condition before seal
• Machine compatibility confirmation matching your Bobcat E-series serial number

Service Interval & Stocking Guidance

• Replace at the first sign of slow cranking; do not wait for complete engagement failure
• Inspect battery terminals and alternator output whenever the 6670727 starter is removed
• Stock one complete unit per five Bobcat compact machines in rental or high-cycle service
• Store in original packaging with desiccant; avoid stacking heavy items on carton
• Record operating hours at each starter replacement to refine future fleet forecasting

Requesting a Lifecycle Quote

Provide your Bobcat machine model, serial number, and current operating hours so we can confirm the correct variant and estimate remaining service life. Include the size of your compact fleet and typical annual hour accumulation for a stocking recommendation that covers your next two maintenance cycles without excess inventory sitting on the shelf.

Frequently Asked Questions

Q: How often should a starter motor be replaced in typical compact excavator service?
A: In high-cycle rental or demolition use, plan a replacement between 2,500 and 3,500 operating hours based on cranking frequency and environmental conditions. Machines that start fewer times per shift but operate in dusty or wet environments may reach the same wear state on a calendar basis. Monitor cranking speed as the primary indicator rather than relying on a fixed hour target alone.

Q: What early symptoms indicate this starter is approaching end-of-life?
A: Slower cranking cadence is the first reliable sign, followed by intermittent solenoid engagement where the pinion does not always mesh cleanly with the ring gear. Rising current draw measured at the battery during cranking also indicates internal brush and commutator wear. Catching these symptoms during a scheduled inspection avoids the emergency scenario where the machine refuses to start under job-site conditions.

Q: Should I replace just the starter motor or inspect the battery and alternator at the same time?
A: Always inspect the full cranking circuit when the starter is removed. A degrading starter places sustained high-current demand on the battery and alternator, shortening their service life. Replacing the 6670727 unit without checking these adjacent components risks a secondary failure within weeks, turning one maintenance event into two and doubling the machine’s total downtime.

Q: How many spare starters should a rental fleet keep on hand?
A: A practical baseline is one complete starter for every five Bobcat compact machines in active rental service. Adjust upward if your fleet operates in extreme cold or high-altitude conditions where cranking loads are heavier. Keep spares in sealed original packaging and rotate stock so the oldest unit goes into service first.

Q: Can I still get replacement parts for older Bobcat 300-series machines?
A: The 6670727 cross-reference covers Bobcat 325 through 341 and early E-series models, and we maintain supply for machines that have passed peak brand-direct support years. Provide your serial number so we can verify the correct variant, as mounting patterns and pinion specifications shifted across production runs within the same model family.