Cat 336 Cost Per Hour: Why Fuel Is Only the First Line
The Cat 336 is a large excavator with a listed 81,100 lb operating weight, 300 hp net power, 158.5 gal fuel capacity, and a 2.61 yd3 HD bucket reference. Heavy Equipment Hub currently uses an 8.7 gal/hr fuel burn estimate and a $106.50/hr machine operating cost estimate before operator labor, trucking, supervision, overhead, and profit. Treat that as a planning number, not a universal rental or bid rate.
Quick Answer: Fuel Cost at Common Diesel Prices
Fuel cost per hour equals gallons per hour multiplied by diesel price. At 8.7 gal/hr, the fuel line alone is about $30.45/hr at $3.50 diesel, $36.98/hr at $4.25 diesel, and $43.50/hr at $5.00 diesel. That does not include DEF, filters, oil, undercarriage, wear parts, repairs, ownership, or downtime.
Build a Cat 336 Rate From Production, Not Just Hours
A Cat 336 should be priced as a production excavator. Start with the bare machine cost, then compare it against the production unit that matters on the job: cost per cubic yard, cost per truck loaded, cost per trench foot, or cost per shift. A higher hourly rate can still be cheaper when the machine loads faster, reaches better, handles the right bucket, or reduces truck waiting. A lower hourly rate can be expensive if the excavator spends the day idling, tracking too far, or working with an undersized truck plan.
Cat 336 Hourly Cost Stack
- Fuel and DEF: fuel burn, idle percentage, work mode, attachment load, local diesel price, and DEF consumption.
- Maintenance reserve: engine oil, hydraulic oil sampling, filters, coolant checks, grease, inspection labor, and planned service parts.
- Undercarriage reserve: track chain, pads, rollers, idlers, sprockets, tension work, cleaning, and wear measurement.
- Ground engaging tools: bucket teeth, adapters, cutting edges, side cutters, pins, bushings, couplers, thumbs, and hammer-related wear.
- Ownership: depreciation, finance cost, insurance, taxes, storage, telematics, resale value, and annual utilization.
Cost Sensitivity Table
| Cost Driver | Field Signal | Estimating Note |
|---|---|---|
| Undercarriage | Rock, demolition debris, long travel, side slopes, or poor cleaning. | Add a higher track reserve and record measurement photos by job. |
| Bucket and GET | Worn teeth, side cutters, coupler pins, hard digging, or oversized bucket. | Track teeth and cutting edge life separately from fuel. |
| Hydraulic system | Hot oil, hammer duty, relief heat, contaminated oil, or missing samples. | Add hydraulic service reserve for attachment-heavy work. |
| Utilization | Low annual hours, long standby periods, or one-project ownership. | Recalculate ownership cost when expected hours change. |
How Utilization Changes the Number
A large excavator can look expensive when annual hours are low because ownership cost is spread across fewer hours. If the Cat 336 is bought for one high-production project and then sits, the cost per hour climbs even if fuel burn stays the same. Track annual utilization separately from billable hours so the rate reflects reality.
Where Cat 336 Costs Can Run Away
Undercarriage wear is one of the biggest risks on a tracked machine in rock, demolition debris, abrasive sand, or poor cleaning conditions. Hydraulic heat and contamination can also convert small maintenance misses into major component costs. If the machine runs high-flow attachments, record attachment hours separately from normal bucket work.
Truck Loading and Idle Risk
When a Cat 336 is used for truck loading, the excavator rate should be tied to truck match. If trucks wait, bucket size, bench height, swing angle, or operator pattern may be limiting production. If the excavator waits for trucks, the machine is consuming ownership cost and sometimes fuel without moving material. Record trucks loaded per hour, average swing angle, truck wait time, idle percentage, and material type before deciding whether the hourly rate is too high.
Bid-Rate Advice
Keep the machine rate separate from operator labor, mobilization, permits, attachments, dump trucks, supervision, markup, and risk. For production digging or truck loading, compare cost per hour with production per hour. A cheaper hourly machine can cost more per yard if it needs more passes or longer cycles.
Internal Research Path
Use the Cat 336 specs page for machine context, the Cat 336 500-hour checklist for reserve planning, and the Cat 336 vs Komatsu PC360LC-11 comparison before deciding whether the job belongs in this size class.
Source and Verification Notes
The Cat 336 spec values come from Caterpillar public product specifications. Fuel burn and hourly operating cost are Heavy Equipment Hub editorial estimates for planning. Replace them with your telematics, fuel tickets, maintenance invoices, track measurements, finance terms, resale assumptions, and dealer service agreement before quoting real work.
