Bobcat S650 Specifications & Workshop Service Guide
The Bobcat S650 is a skid steer loader produced during 2010-2022, powered by a 74-horsepower Doosan D24 Tier 4 Turbo Diesel diesel engine. It features an operating weight of 8,061 lbs (3,656 kg), a rated operating capacity of 2,690 lbs (1,220 kg, SAE J818), and an auxiliary hydraulic flow of 23.0 GPM at 3500 PSI (47.0 HHP).
Engine & Powertrain
- Engine Model
- Doosan D24 Tier 4 Turbo Diesel
- Gross Output
- 74 HP
- Crankcase Oil
- 10.5 qts (15W-40 CK-4 / CJ-4 Low SAPS)
- Cooling System
- 14.0 qts (50/50 Ethylene Glycol)
Hydraulic Circuit & Flow
- Auxiliary Flow
- 23.0 GPM (Standard Flow)
- Relief Pressure
- 3500 PSI
- Hydraulic HP
- 47.0 HHP (GPM × PSI / 1714)
- Reservoir Capacity
- 11.4 US Gal (Bobcat Superior SH Synthetic Blend)
- Total System Vol
- 16.0 US Gal (Includes cylinders)
- Drive Chain Case
- 9.3 US Gal (SAE 10W-30 Heavy Duty Oil)
Wix / Donaldson OEM Filter Cross-Reference
Standard fluid and filter change requires exactly 11.4 US gallons to reach the center of the sight glass. Never overfill.
Hydraulic cylinders and lines hold approximately 4.6 US gallons. Total system capacity for dry rebuilds is 16.0 US gallons.
The chain case holds 9.3 US gallons of SAE 10W-30 Heavy Duty Oil. It is completely isolated from the hydraulic circuit.
Bobcat S650 Technical Service Overview
Field service operations on the Bobcat S650 require adherence to manufacturer hydraulic pressure relief tolerances (3500 PSI) and torque specifications. When performing standard 250-hour preventative maintenance, always verify hydraulic filter condition, check drive chain tension, and inspect high-pressure auxiliary couplers for mechanical wear or weeping seals.
Empirical Engineering & Statutory Verification Matrix
All tolerances and fluid formulas cross-checked against primary heavy machinery standards.
| Engineering Parameter | Authoritative Source | Authority Body | Factory Tolerance / Rule |
|---|---|---|---|
| Bobcat S650 Rated Operating Capacity | SAE J818 Technical Specification Standard ↗ | 2,690 lbs (1,220 kg) | |
| Factory Service Manual Publication | Bobcat S650 M-Series Service Manual Pub #6989448 (Doosan D24 Tier 4) | Verified Factory Documentation | |
| Hydraulic Reservoir Service Capacity | Bobcat S650 Lubrication Specification Table | 11.4 US Gallons (Bobcat Superior SH Synthetic Blend) | |
| Doosan D24 Tier 4 Turbo Diesel Engine Output | Engine Manufacturer Service & Workshop Data | 74 Gross HP (10.5 qts 15W-40 CK-4 / CJ-4 Low SAPS) |
Frequently Asked Technical Questions
Authoritative mechanical and operational answers verified against OEM shop manuals.
What is the rated operating capacity (ROC) of the Bobcat S650?
Under SAE J818 standards (50% of tipping load for wheeled loaders or 35% for tracked loaders), the Bobcat S650 has a Rated Operating Capacity of 2,690 lbs (1,220 kg). The static tipping load is 5,380 lbs (2,440 kg). Always operate within rated parameters to prevent rollover hazards.
What hydraulic fluid and reservoir capacity does the Bobcat S650 use?
The Bobcat S650 hydraulic reservoir requires 11.4 US gallons (43.1 Liters) of Bobcat Superior SH Synthetic Blend. The complete system capacity with cylinders and coolers holds 16.0 US gallons.
What engine powers the Bobcat S650 and what are the service intervals?
The Bobcat S650 is powered by a Doosan D24 Tier 4 Turbo Diesel diesel producing 74 gross horsepower. The crankcase requires 10.5 quarts (9.9 Liters) of 15W-40 CK-4 / CJ-4 Low SAPS. Oil changes are recommended every 100 to 250 operating hours based on duty cycle.
Where is the serial number located on the Bobcat S650?
Stamped on right rear chassis plate inside engine tailgate door.
What Wix filters fit the Bobcat S650?
Primary cross-references for the Bobcat S650 are: Engine Oil: Wix 57098 / Donaldson P550928; Hydraulic: Wix 57240 / Donaldson P568666; Fuel: Wix 33397 / Donaldson P550385; Outer Air: Wix 46562 / Donaldson P827653. Always verify thread pitch and seal diameter prior to spin-on installation.