Contents
Dimensions
| Bobcat 331 / 331E Arm | Standard | Long Arm | Extendable |
|---|---|---|---|
| A. Blade Height | 14.9 in (379 mm) | 14.9 in (379 mm) | 14.9 in (379 mm) |
| B. Tail Swing Clearance | 20.1 in (511 mm) | 20.1 in (511 mm) | 20.1 in (511 mm) |
| C. Groundline to Top of Engine Cover | 58.1 in (1476 mm) | 58.1 in (1476 mm) | 58.1 in (1476 mm) |
| D. Length of Track on Ground | 61.5 in (1562 mm) | 61.5 in (1562 mm) | 61.5 in (1562 mm) |
| E. Machine Centerline to Blade | 64.5 in (1638 mm) | 64.5 in (1638 mm) | 64.5 in (1638 mm) |
| F. Minimum Radius in Transport Position | 137.5 in (3492 mm) | 137.8 in (3499 mm) | 142.9 in (3630 mm) |
| G. Overall Length of Track Assembly | 78.9 in (2005 mm) | 78.9 in (2005 mm) | 78.9 in (2005 mm) |
| H. Overall Length in Transport Position | 192.1 in (4879 mm) | 192.5 in (4889 mm) | 198.8 in (5050 mm) |
| I. Track Lug Height | 0.98 in (25 mm) | 0.98 in (25 mm) | 0.98 in (25 mm) |
| J. Overall Width Over Blade | 60.6 in (1540 mm) | 60.6 in (1540 mm) | 60.6 in (1540 mm) |
| K. Overall Height to Top of Cab | 92.9 in (2358 mm) | 92.9 in (2358 mm) | 92.9 in (2358 mm) |
| L. Track Width | 12.6 in (320 mm) | 12.6 in (320 mm) | 12.6 in (320 mm) |
| M. Machine Centerline to Working Equipment Centerline, LH Rotation | 15.7 in (398 mm) | 15.7 in (398 mm) | 15.7 in (398 mm) |
| N. Machine Centerline to Working Equipment Centerline, RH Rotation | 24.1 in (611 mm) | 24.1 in (611 mm) | 24.1 in (611 mm) |
| O. Minimum Turning Radius | 60.0 in (1524 mm) | 60.0 in (1524 mm) | 60.0 in (1524 mm) |
| P. Tail Swing Radius | 54.7 in (1390 mm) | 54.7 in (1390 mm) | 54.7 in (1390 mm) |
| Q. Working Width Maximum RH Rotation | 90.9 in (2309 mm) | 90.9 in (2309 mm) | 90.9 in (2309 mm) |
| R. Working Width Maximum LH Rotation | 83.5 in (2122 mm) | 83.5 in (2122 mm) | 83.5 in (2122 mm) |
| Tail Swing Overhang | 24.4 in (620 mm) | 24.4 in (620 mm) | 24.4 in (620 mm) |
Working Range (Bobcat 331)
| Bobcat 331 Arm | Standard | Long Arm |
|---|---|---|
| Bucket Digging Force | 7000 lbf (31.14 kN) | 7000 lbf (31.14 kN) |
| Arm (Stick) Digging Force | 4000 lbf (17.79 kN) | 4000 lbf (17.79 kN) |
| A. Bucket Pivot Angle | 186° | 186° |
| B. Maximum Radius of Working Equipment | 205.5 in (5219 mm) | 216.8 in (5507 mm) |
| C. Maximum Reach at Ground Level | 200.7 in (5097 mm) | 212.4 in (5395 mm) |
| D. Maximum Working Equipment Radius with Boom @ Maximum Height | 93.1 in (2365 mm) | 94.2 in (2393 mm) |
| E. Maximum Blade Height | 15.7 in (398 mm) | 16.0 in (405 mm) |
| F. Maximum Blade Depth | 21.5 in (546 mm) | 21.0 in (534 mm) |
| G. Maximum Height of Working Equipment with Arm Retracted | 138.6 in (3522 mm) | 138.6 in (3520 mm) |
| H. Maximum Bucket Tooth Height | 180.0 in (4571 mm) | 187.2 in (4755 mm) |
| I. Maximum Dump Height | 123.0 in (3125 mm) | 129.0 in (3276 mm) |
| J. Maximum Depth of Vertical Wall which can be Excavated | 85.6 in (2175 mm) | 102.5 in (2604 mm) |
| K. Maximum Dig Depth | 120.7 in (3066 mm) | 132.5 in (3366 mm) |
Working Range (Bobcat 331E)
| Bobcat 331E | Extendable Arm Retracted | Extendable Arm Extended |
|---|---|---|
| Bucket Digging Force | 7000 lbf (31.14 kN) | 7000 lbf (31.14 kN) |
| Extendable Arm (Stick) Digging Force | 4225 lbf (18.79 kN) | 2492 lbf (11.08 kN) |
| A. Bucket Pivot Angle | 184° | 184° |
| B. Maximum Radius of Working Equipment | 195.9 in (4977 mm) | 224.7 in (5709 mm) |
| C. Maximum Reach at Ground Level | 191.6 in (4866 mm) | 221.0 in (5614 mm) |
| D. Maximum Working Equipment Radius with Boom @ Maximum Height | 89.1 in (2262 mm) | 86.2 in (2190 mm) |
| E. Maximum Blade Height | 15.4 in (390 mm) | 15.4 in (390 mm) |
| F. Maximum Blade Depth | 21.1 in (546 mm) | 21.1 in (535 mm) |
| G. Maximum Height of Working Equipment with Arm Retracted | 139.7 in (3549 mm) | 139.7 in (3549 mm) |
| H. Maximum Bucket Tooth Height | 175.6 in (4459 mm) | 188.3 in (4782 mm) |
| I. Maximum Dump Height | 121.1 in (3077 mm) | 132.0 in (3404 mm) |
| J. Maximum Depth of Vertical Wall which can be Excavated | 69.0 in (1752 mm) | 100.4 in (2550 mm) |
| K. Maximum Dig Depth | 122.0 in (3098 mm) | 154.1 in (3914 mm) |
Bobcat 331 / 331E Buckets
| Bucket Width | Bucket Type / Capacity |
|---|---|
| 12 in (305 mm) | Trenching, 1.6 ft3 (0.045 m3) |
| 13 in (330 mm) | Trenching, 2.1 ft3 (0.059 m3) |
| 16 in (406 mm) | Trenching, 2.31 ft3 (0.065 m3) |
| 18 in (457 mm) | Trenching, 2.68 ft3 (0.076 m3) |
| 20 in (508 mm) | Trenching, 3.05 ft3 (0.086 m3) |
| 24 in (610 mm) | Trenching, 3.8 ft3 (0.108 m3) |
| 24 in (610 mm) | HD trenching, 3.8 ft3 (0.108 m3) |
| 30 in (760 mm) | Trenching, 4.9 ft3 (0.139 m3) |
| 36 in (914 mm) | Trenching, 6.02 ft3 (0.170 m3) |
| 36 in (914 mm) | Grading, 5.19 ft3 (0.147 m3) |
| 48 in (1219 mm) | Grading with Cutting Edge, 7.12 ft3 (0.202 m3) |
Weights
| Operating Weight, Canopy, Standard Arm | 7756 lb (3518 kg) |
| Operating Weight, Cab, Heat/Air Conditioning | 8019 lb (3637 kg) |
| Operating Weight, Canopy, Extendable Arm | 8301 lb (3765 kg) |
| Operating Weight, Canopy, Long Arm | 8166 lb (3704 kg) |
Operating Weight (includes standard equipment and 24 in (610 mm) bucket (SAE J732)
Engine Details
| Engine Model | Kubota V2203 M-DI-E2B | Kubota V2403 M-DI-E3B |
|---|---|---|
| Number of Cylinders | 4 | 4 |
| Displacement | 134.1 cu in (2.197 L) | 148.5 cu in (2.434 L) |
| Bore | 3.43 in (87.0 mm) | 3.43 in (87.0 mm) |
| Stroke | 3.64 in (92.4 mm) | 4.03 in (102.4 mm) |
| Gross Horsepower | 40.6 hp (30.3 kw) | 41.8 hp (31.2 kw) |
| Net Horsepower | 40.0 hp (29.9 kw) | 40.5 hp (30.2 kw) |
| Power Measured @ | 2400 rpm | 2200 rpm |
| Peak Torque | 103.5 lb ft (140 Nm) | 102.5 lb ft (139 Nm) |
| Torque Measured @ | 2400 rpm | 1500 rpm |
| Fuel System | In-line pump | In-line pump |
| Combustion System | Direct Injection | Direct Injection |
| Lubrication System | Pressure system with full-flow filter | Forced lubrication with full-flow filter |
| Crankcase Ventilation | Closed Breathing | Closed Breathing |
| Air Cleaner | Dual dry replaceable paper cartridge | Dry replaceable cartridge with safety element |
| Aspiration | Naturally aspirated | Naturally aspirated |
| Emission Standards | US EPA Tier 2 + EU Stage IIIA | US EPA interim Tier 4 + EU Stage IIIA |
Electrical System
| Operating Voltage | 12 V |
| Alternator | 90 amps |
| Battery | 12 V, RC: 80 min, CCA 540, BCI 26 (Bobcat 7269858) |
| Working Lights | Boom-mounted and frame-mounted adjustable lights |
Operator Environment
| Cab / Canopy (Standard) | Canopy with ROPS/TOPS |
| Cab / Canopy (Optional) | Enclosed Cab With Heater and A.C |
| ROPS | SAE-J1040C |
| TOPS | ISO/DIS 12117 |
| FOGS | Available as a field-installed accessory |
| HVAC | Optional for Cab |
| Instrumentation Panel | Auxiliary Mode Indicator; Console Indicator; Hourmeter / Job Clock / Tachometer; Engine / Hydraulic System Indicators; Engine Temperature Gauge; Fuel Gauge; Low Fuel Indicator; Pre-Heat Indicator; 2-Speed Indicator |
| Operator Seat | Suspension Seat |
| Seat Belt | Retractable Seat Belt |
Swing System
| Swing Speed | 9.2 rpm |
| Boom Swing, Left | 90° |
| Boom Swing, Right | 50° |
| Swing Motor | Orbit Motor |
| Swing Service Brake | Hydraulic lock on motor |
| Swing Holding Brake | Pin lock |
Travel System
| Type | Hydrostatic transmission |
| Hydraulic Drive Motors | 2x axial piston motors |
| Type of Reduction | Two stage planetary gear reduction 36.4:1 |
| Traction Force (Drawbar Pull) | 7830 lbf (34.84 kN) |
| Travel Speed, Low (Kubota V2203 / V2403) | 1.3 mph (2.1 km/h) / 1.7 mph (2.7 km/h) |
| Travel Speed, High (Kubota V2203 / V2403) | 3.5 mph (5.6 km/h) / 3.2 mph (5.15 km/h) |
| Service Brakes | Hydraulic lock in hydrostatic motor circuit |
| Parking Brake | Hydraulic lock in motor circuit |
Undercarriage
| Rubber Tracks (Standard) | 12.6 in (320 mm) |
| Steel Tracks (Optional) | 12.6 in (320 mm) |
| Rubber Tracks (Optional) | 11.8 in (300 mm) |
| Track Adjusters | Grease Type with Shock Absorbing Recoil Springs |
| Track Rollers | Sealed with Reinforced Box-Section Track Roller Frame |
| Number of Track Rollers (per side) | 4 |
| Length of Track on Ground | 61.5 in (1562 mm) |
| Width of Crawler | 60.6 in (1540 mm) |
| Track Lug Height | 0.98 in (25 mm) |
| Ground Pressure (Rubber Tracks) | 4.22 psi (29.1 kPa) |
| Ground Pressure (Steel Tracks) | 4.31 psi (29.7 kPa) |
| Gradeability | 30° |
Dozer Blade
| Dozer Blade Height | 14.9 in (379 mm) |
| Dozer Blade Width | 60.6 in (1540 mm) |
| Max Blade Lift Height (Standard / Long / Extendable Arm) | 15.7 in (398 mm) / 16.0 in (405 mm) / 15.4″ (390 mm) |
| Max Blade Dig Depth (Standard / Long / Extendable Arm) | 21.5 in (546 mm) / 21.0 in (534 mm) / 21.1 in (535 mm) |
| Dozer Blade Control | Seperate hand lever |
Hydraulic System
| Type | Closed center hydraulics |
| Control Valves | 10-Spool |
| Pump Type | Dual Outlet Piston with Gear |
| Pump Flow Capacity | 2 x 10.1 gal/min (38.4 L/min) |
| Auxiliary Pump Flow | 15.9 gal/min (64.0 L/min) |
| System Relief Pressure – Equipment | 3480 psi (27000 kPa) |
| System Relief Pressure – Auxiliary | 2600 psi (18000 kPa) |
| Bucket Curl Time | 2.6 sec |
| Bucket Dump Time | 1.8 sec |
| Arm Retract Time | 3.3 sec |
| Arm Extend Time | 2.7 sec |
| Boom Raise Time | 4.6 sec |
| Boom Lower Time | 5.4 sec |
| Boom Swing Left | 6.2 sec |
| Boom Swing Right | 5.7 sec |
| Blade Raise Time | 2.9 sec |
| Blade Lower Time | 3.2 sec |
Service Refill Capacities
| Engine Model | Kubota V2203 | Kubota V2403 |
|---|---|---|
| Fuel Tank Capacity | 14.1 gal (53.4 L) | 2.3 gal (46.6 L) |
| Engine Oil Capacity (with Filter) | 1.9 gal (7.1 L) | 1.9 gal (7.1 L) |
| Cooling System Capacity | 4.5 gal (17.0 L) | 4.5 gal (17.0 L) |
| Hydraulic System Capacity | 11.6 gal (44 L) | 11.6 gal (44 L) |
| Hydraulic Tank Capacity | 7.8 gal (29.5 L) | 7.8 gal (29.5 L) |
| Drive Motors Capacity (each side) | 0.13 gal (0.5 L) | 0.13 gal (0.5 L) |
Bobcat 331 / 331E Filters
| Filter | Part Number |
|---|---|
| Air Filter (Inner), SN: 5119 20001-; 5129 11001 – 5129 12999 | 6598362 |
| Air Filter (Inner), SN: 5129 13001-; 5167 11001-; 5177 11001-; 2325 11001-; 5290 11001-; A00B 11001 – A00B 11029; A9K5 11001-; AACS 11001- | 6666334 |
| Air Filter (Outer), SN: 5119 20001-; 5129 11001 – 5129 12999 | 6598492 |
| Air Filter (Outer), SN: 5129 13001-; 5167 11001-; 5177 11001-; 2325 11001-; 5290 11001-; A00B 11001 – A00B 11029, A9K5 11001-; AACS 11001- | 6666333 |
| Engine Oil Filter | 6675517 |
| Fuel Filter | 6667352 |
| Hydraulic Filter, SN: 5119 20001-; 5129 11001 – 5129 12999; 5129 13001-; 5167 11001-; 5177 11001- | 6653336 |
| Hydraulic Filter, SN: 2325 11001-; 5290 11001-; A00B 11001 – A00B 11029, A9K5 11001-; AACS 11001- | 6516722 6661248 |
| Hydraulic In-Line Filter | 6516722 |
| Hydraulic Breather Cap | 6692836 |
| HVAC Filter, SN: 2325 11001-; 5290 11001-; A00B 11001 – A00B 11029, A9K5 11001-; AACS 11001- | 6691530 |
The Bobcat 331 mini excavator is a compact and powerful machine designed for a wide range of applications, and its versatility is enhanced by a robust lineup of compatible attachments. Whether you’re digging, breaking, compacting, or lifting, the 331 is ready to tackle tough jobs with precision and efficiency.
Available attachments include the auger for drilling, breaker for concrete demolition, hydraulic clamp and 3-tined grapple for secure material handling, and compactor for efficient soil compaction. For added functionality, operators can also equip the 331 with a power–tilt coupler, a ripper for penetrating hard ground, or a cutter/crusher for on-site material processing. This wide array of tools makes the Bobcat 331 a dependable choice for contractors who demand performance and flexibility on the jobsite.
