Caterpillar 211B
Caterpillarexcavator

Caterpillar 211B

Maintenance schedule, common problems & OEM parts breakdown

The Caterpillar 211B is a mid-size tracked hydraulic excavator in the roughly 15 to 16 tonne operating class, produced from about 1990 to 1992 as the direct replacement for the original 211 (built roughly 1984 to 1990). The 211 ran a naturally aspirated, Perkins-based Cat T4.236 four-cylinder diesel rated about 93.9 hp (70 kW) and weighed close to 14,800 kg (32,629 lb). The 211B switched to the turbocharged Cat 3114, a 4.4L mechanically governed four-cylinder diesel rated about 105 hp gross (78 kW) with no electronic engine controls. Operating weight in LC (wide-track) configuration runs about 15,750 kg (34,723 lb); standard-gauge undercarriage and several boom-and-stick length combinations were offered to suit different reach and digging-depth needs. The 211B was itself succeeded by the Cat 311 starting in 1994, later refined into the 311B from 1997.

Moving from the 211 to the 211B brought a load-sensing hydraulic system and a new single variable-displacement main pump in place of the older hydraulic circuit, along with a revised undercarriage and higher stick and bucket forces that increased digging depth, reach, and lift capacity. The 211B shares hydraulic and platform documentation with the 205B, 206B FT, and 212B FT, so parts and service data cross over within that B-series family. In today's used and parts market, the 211B's appeal is mechanical simplicity: a 3114 diesel with no ECM, sensors, or aftertreatment to fail, paired with a straightforward load-sensing hydraulic layout that is cheap to diagnose and keep running. Parts commonality with its B-series siblings keeps used pumps, motors, and undercarriage components easier to source than the machine's age would suggest.

Below: full specifications, fluids & capacities, the factory service schedule, common service parts, verified fault codes, what owners discuss, attachment guidance, the complete assembly directory, and a serial-number reference. Complete parts lists with full OEM part numbers, exploded diagrams, quantities, and fitment data are available free in Heavy Parts AI.

Caterpillar 211B specifications

Engine

Engine modelCat 3114, turbocharged 4-cylinder diesel
Gross power78.3 kW (105 hp)
Net powerNot documented for this exact model
Displacement4.4 L (268.6 cu in)
Cylinders4, in-line
Emissions certificationPredates nonroad emissions-tier regulation; mechanical fuel system, no Tier/Stage certification
Series notes211B superseded the original 211 around 1990. The 211 used a naturally aspirated Perkins-based engine; the 211B moved to the turbocharged Cat 3114, giving higher stick and bucket forces, deeper dig depth, and greater reach

Weights

Operating weight (LC / long-carriage configuration)15,750 kg (34,723 lb)
Operating weight (standard-carriage configuration)Not documented — only the LC long-carriage variant has a published operating weight
Ground pressure35.2 kPa / 0.36 kg/cm² (5.1 psi)
Transport weightNot separately published; operating weight is the closest documented figure

Dimensions

Transport lengthNot documented for this exact model
Overall width (over tracks)2.74 m (8.99 ft)
Height to top of cab2.98 m (9.77 ft)
Tail swing radius2.14 m (7.03 ft)
Track shoe width60 cm (23.6 in)
Ground clearance0.41 m (16 in)
Track gauge2.24 m (7.35 ft)
Counterweight clearance1.10 m (3.6 ft)
Undercarriage / track-on-ground lengthNot documented for this exact model

Performance

Max digging depth4.76–7.14 m (15.6–23.4 ft), varies by boom/stick configuration
Max reach at ground level7.98–10.19 m (26.2–33.4 ft), varies by boom/stick configuration
Max dump / loading height5.64–6.55 m (18.5–21.5 ft), varies by boom/stick configuration
Max cutting height7.95–8.77 m (26.1–28.8 ft), varies by boom/stick configuration
Swing speedNot documented for this exact model
Max travel speed4.5 km/h (2.8 mph)
GradeabilityNot documented for this exact model
Drawbar pull140 kN / 14,276 kgf (31,473 lb)

Forces

Bucket digging forceNot published in available spec sources for this model
Stick / arm digging forceNot published in available spec sources for this model; sources note the 211B has higher stick and bucket forces than the preceding 211 but give no figures

Service capacities (summary)

Fuel tank270 L (71.4 gal)
Hydraulic system205 L (54.2 gal); relief pressure 32.0 MPa (4,640 psi); pump flow 230 L/min (60.8 gpm)
Engine oilNot documented specifically for the excavator installation
Cooling systemNot documented specifically for the excavator installation

Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.

211B fluids & capacities

SystemCapacityRecommended fluid
Engine crankcase (with filter)Not published in available literature for this exact model — Cat 3114 turbocharged 4-cylinder diesel, 4.4 L displacement, 105 fwhp; confirm exact refill quantity against the OMM or dealer parts book before service.Cat DEO (Diesel Engine Oil), multigrade. SAE 10W-30 for wide cold-to-moderate ambient range, SAE 15W-40 for warm climates, selected per Cat's ambient-temperature viscosity guide.
Cooling systemNot published in available literature for this exact model — confirm against the OMM or dealer parts book before service.Cat DEAC (Diesel Engine Antifreeze/Coolant) or Cat ELC, mixed per Cat's standard concentration for year-round freeze and boil protection.
Fuel tank270 L (71.4 US gal)No. 2-D diesel fuel meeting Cat's diesel fuel specification; low-sulfur fuel suited to the 3114 turbocharged diesel.
Hydraulic system, total (tank + lines + cylinders)205 L (54.2 US gal)Cat TDTO (Transmission/Drive Train Oil), meeting Cat TO-4 spec — shared fluid across hydraulic and drivetrain compartments on this small-excavator platform. SAE 10W for cold climates, SAE 30 for warm climates, TDTO-TMS multigrade for year-round use.
Hydraulic tank (reservoir only)Not separately published — only the total system figure is documented for this model.Cat TDTO, same as hydraulic system total.
Final drive (each)Not published in available literature for this exact model — confirm against the OMM or dealer parts book before service.Cat TDTO, meeting Cat TO-4 spec, same viscosity-by-climate guidance as the hydraulic system.
Swing driveNot published in available literature for this exact model — confirm against the OMM or dealer parts book before service.Cat TDTO, meeting Cat TO-4 spec, same viscosity-by-climate guidance as the hydraulic system.
Grease, all pointsNot a refill capacity — applied per lubrication interval at chassis, linkage, and pin points.Cat Multipurpose Grease (Cat MPGM), NLGI 2 lithium-complex base.

Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.

Caterpillar 211B maintenance schedule

Service intervalTasks
Every 10 h
  • Check engine oil level before starting and top off as needed.
  • Check coolant level at the sight glass or overflow tank.
  • Drain water and sediment from the fuel/water separator.
  • Walk around the machine checking for leaks, loose bolts, and track damage.
  • Weekly (every 50 hours): grease boom, stick, and bucket linkage pins.
  • Weekly (every 50 hours): check track sag and adjust tension.
Every 250 h
  • Change engine oil and replace the engine oil filter.
  • Replace primary and secondary fuel filters.
  • Inspect and clean the primary air filter element.
  • Check final drive and swing drive oil levels.
  • Check alternator and fan belt tension and condition.
Every 500 h
  • Replace the hydraulic tank breather and return-line filter element.
  • Sample engine, hydraulic, and final drive oil for wear-metal analysis.
  • Inspect the turbocharger for shaft play and oil leaks.
  • Check battery electrolyte level and terminal condition.
  • Inspect track chain, rollers, idlers, and sprockets for wear.
Every 1,000 h
  • Change final drive oil in both travel motors.
  • Change swing drive gear oil.
  • Check and adjust engine valve lash.
  • Replace the hydraulic case-drain filter.
  • Re-torque swing bearing mounting bolts to specification.
Every 2,000 h
  • Drain and replace hydraulic tank oil; clean the tank and suction strainer.
  • Check fuel injection pump timing and injector condition.
  • Inspect swing bearing gear mesh and backlash.
  • Measure undercarriage wear (chain, bushings, sprockets) against factory limits.
Every 4,000 h
  • Drain, flush, and refill the cooling system with fresh conventional heavy-duty coolant and inhibitor (or every 2 years, whichever comes first).
  • Have injection pump calibration checked and injectors tested or reconditioned.
  • Test main hydraulic pump output flow and pressure against factory specification.
  • Inspect and replace age-hardened hydraulic hoses and cylinder seals as needed.
  • Check turbocharger boost pressure and rebuild if performance has dropped.
Every 6,000 h
  • Rebuild or replace the main hydraulic pump if flow output is below specification.
  • Rebuild swing motor and travel motor assemblies showing internal leakage.
  • Rebush boom, stick, and bucket pin bores worn beyond tolerance.
  • Inspect final drive planetary gears and bearings; rebuild as needed.

Servicing the 211B beyond the schedule

Predictive Maintenance & Fluid Analysis

Run oil sampling on the 3114 engine, hydraulic tank, swing drive, and both final drives at every 250- to 500-hour service; the mechanical fuel system carries no onboard diagnostics, so wear-metal trends are the earliest warning of injection pump, turbocharger bearing, or main pump wear. Watch hydraulic oil cleanliness closely: the single load-sensing pump and spool valves on the 211B are unforgiving of contamination. Check coolant condition and inhibitor level at each interval, since this machine predates extended-life coolant.

Corrective & Common Repairs

Expect floating-seal leaks at the travel motor-to-sprocket joint and swing motor internal leakage as the most common failures on an aging 211B undercarriage and upper. The 3114's mechanical injection pump and injectors harden and start leaking with age; reseal or exchange them rather than chase a hard-start complaint. Main pump and hydraulic cylinder reseals (boom, stick, bucket) are routine at this hour range. Sealed-and-lubricated track chain bushings and pins wear steadily; measure before replacing rollers or sprockets.

Overhaul & Rebuild Points

The 3114's simple mechanical architecture makes an inframe overhaul (liners, pistons, bearings) economical once oil analysis shows persistent wear trends. Plan hydraulic pump, swing motor, and travel motor rebuilds together, since contamination in one usually marks the others. Swing bearing bolts need re-torque and the gear mesh checked before backlash becomes bearing damage. Boom, stick, and bucket pin bores typically need rebushing by the time undercarriage chain and rollers reach replacement limits, so budget them as one overhaul event.

Seasonal & Environment Servicing

Cold starts on the mechanically governed 3114 rely on ether or an engine block heater, not glow-plug electronics, so check the starting-aid canister and battery condition before winter. Adjust track sag for temperature and drop to a lighter-viscosity hydraulic oil grade in cold climates; verify coolant freeze protection each fall. In hot, dusty applications, clean radiator and hydraulic oil cooler fins more often and shorten air filter and track-grease intervals to protect the sealed-and-lubricated chain from abrasive wear.

211B fault codes & troubleshooting

CodeMeaningLikely causeWhat to do
Coolant Temperature Warning LampEngine coolant temperature gauge reads into the red zone and the matching lamp on the monitor panel lights up.Low coolant level, a plugged or debris-packed radiator core, a slipping or broken fan belt, or a failed thermostat.Idle down, let the engine cool, then check coolant level and radiator core before returning to full load.
Hydraulic Oil Temperature Warning LampHydraulic oil temperature gauge reads into the red zone and the corresponding panel lamp lights, warning of overheated hydraulic oil.Low hydraulic oil level, a clogged oil cooler core, a worn pump or relief valve generating excess heat, or extended heavy relief-valve work.Reduce load, let the oil cool, then check oil level and cooler cleanliness before resuming work.
Engine Oil Pressure Warning LampEngine oil pressure has dropped below the safe minimum; the lamp lights and on this monitor is normally paired with an audible alarm.Low engine oil level, a failing oil pump, a plugged oil filter, or a faulty oil pressure sender.Shut the engine down immediately, check oil level, then inspect the sender and wiring before restarting.
Charging System (Alternator) Warning LampBattery is not receiving charge from the alternator while the engine runs; the lamp stays lit instead of going out at start-up.Slipping or broken alternator belt, worn brushes or regulator, or a loose or corroded charging-circuit connection.Check belt tension and the wiring at the alternator and battery before continuing operation.
Fuel Level Warning LampFuel tank level has dropped to the low-fuel threshold shown on the gauge.Tank run low from normal use.Refuel promptly to avoid drawing air into the mechanical fuel system.
Air Cleaner Restriction IndicatorAir intake restriction has reached the service limit, popping the restriction indicator or lighting a panel lamp.Dirty or clogged air filter element.Service or replace the air filter element and reset the indicator.
Hydraulic Filter Bypass IndicatorReturn-line hydraulic filter has reached bypass pressure, showing restricted flow through the element.Clogged hydraulic filter element, or cold, thick oil at cold start-up.Recheck the indicator once oil is warm; replace the filter element if it stays tripped.

Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.

211B attachments & work tools

Buckets

The 211B/211B LC operates at roughly 14.7-15.75 t (32,400-34,700 lb) depending on undercarriage and stick configuration, and its bucket lineup for that class spans about 0.25-0.86 m³ across general-purpose, trenching/ditching and heavy-duty/rock buckets, with widths up to roughly 1.4 m on the wide GP/ditching end and narrower profiles for HD and rock work. Buckets mount pin-on as the factory standard; the stick and bucket linkage on this class also accepts aftermarket wedge-style or pin-grabber quick couplers sized for the 12-20 t excavator range.

Hydraulic hammers

Carrier operating weight places the 211B in the same size class served by today's 12-20 t breaker range, roughly equivalent to a mid-size hammer class (about 950-1,460 kg working weight) from Cat or a comparable competitor line. Match the actual hammer to the machine's measured auxiliary flow and relief-valve pressure rather than the carrier weight class alone, since factory hydraulic output on this legacy model varies by configuration and pump condition.

Quick couplers

Factory quick couplers were not standard on this generation of Cat excavator; most 211B units left the factory with pin-on work tools only. Dealers and attachment suppliers commonly retrofit pin-grabber or wedge-type couplers sized to the 12-20 t class stick/bucket pin carrier so buckets and other tools can be swapped without pulling pins.

Thumbs/grapples

Hydraulically actuated bolt-on thumb kits sized for this machine's stick and bucket-pin carrier fit for material sorting, loading assist and demolition debris handling. Sorting/demolition grapples built for the same 12-20 t carrier class are also compatible, mounted either pin-on or through a retrofit coupler.

Rippers

A standalone ripper attachment is uncommon on excavators this size. Ripping duty on the 211B is normally handled with a single ripper tooth or tine fitted into the bucket linkage in place of the bucket, or a reinforced rock tooth on the bucket itself, used to break frost or hard-pan ahead of digging rather than a dedicated ripper unit.

Hydraulic kit notes

As a 1990s-era Cat 3114-powered machine, the 211B's stock circuit is sized for boom/stick/bucket/swing functions; adding a hammer, thumb or grapple typically means tapping an auxiliary or service valve plumbing kit into the main system rather than relying on a dedicated factory high-flow circuit. Confirm the machine's actual pump flow and relief pressure before sizing any attachment circuit, since this model predates Cat's later high-flow auxiliary packages and output varies unit to unit.

All 211B assemblies by section

Every catalogued assembly group for the Caterpillar 211B. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Air Inlet And Exhaust System
7c2290 Cover Gp-Inlet Manifold
7C***90Cover Group-Inlet Manifold; Inlet Manifold Cover Group1
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4w6609 Lines Gp-Air
4W***09Lines Group-Air; Air Lines Group1
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4w6615 Lines Gp-Turbocharger Oil
4W***15Lines Group-Turbocharger Oil; Turbocharger Oil Lines Group1
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1w8898 Manifold Gp-Exhaust
1W***98Manifold Group-Exhaust; Exhaust Manifold Group1
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4w5362 Manifold Gp-Inlet
7e5186 Turbocharger Gp
Basic Engine
4w5281 Balancer Gp
4w4865 Camshaft Gp-Single
4W***65Camshaft Group-Single; (Single)1
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4w3462 Carrier Gp-Seal
4W***62Carrier Group-Seal; Carrier Group (Seal)1
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1w8897 Cover Gp-Cylinder Block
1W***97Cover Group-Cylinder Block; Cylinder Block Cover Group1
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7l0004 Cover Gp-Front
7L***04Cover Group-Front; (Front Housing)1
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9y7618 Cover Gp-Valve Mechanism
9Y***18Cover Group-Valve Mechanism; Valve Mechanism Cover Group1
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4w3579 Crankshaft Gp
4W***79Crankshaft Group; Crankshaft Group1
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7e5311 Cylinder Block Gp
7e2481 Cylinder Block Gp
7w5664 Cylinder Head As
9y6164 Cylinder Head As*R
9y8849 Cylinder Head Gp*R
9y8872 Cylinder Head Gp
9Y***72Cylinder Head Group; Cylinder Head Group1
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7c4532 Drain Gp-Oil Pan
7C***32Drain Group-Oil Pan; Oil Pan Drain Group1
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7c0044 Drive Gp-Fan
7C***44Drive Group-Fan; Fan Drive Group1
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7w9375 Flywheel Gp
2w8475 Gear Gp-Front
2W***75Gear Group-Front; Front Gear Group1
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7w8813 Housing Gp-Flywheel
7l0002 Housing Gp-Front
4w2515 Lifting Gp-Engine
4w4866 Fuel Pump & Valve Mechanism Gp
4W***66Mechanism Group-Fuel Pump & Valve1
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1w7632 Pan Gp-Oil
9y8543 Rod & Piston Gp
9y8314 Pulley Gp
9y4914 Pulley Gp-Crankshaft
7c6077 Rocker Arm Gp-Valve
4w1016 Seal Gp-Crankshaft
7e5633 Support Gp-Engine
Boom, Sticks, Linkage & Buckets
5w0573 Bkt Gp-Prof (W/Teeth)(400mm 1 : 1.5)
5w0572 Bkt Gp-Prof (W/Teeth)(600mm 1 : 1.25)
5w0571 Bkt Gp-Prof (W/Teeth)(400mm 1 : 1.25)
5w0574 Bkt Gp-Prof (W/Teeth)(600mm 1 : 1.5)
5w0569 Bkt Gp.-Prof (W/Teeth) (400mm 1 : 1)
5w0570 Bkt Gp.-Prof (W/Teeth) (600mm 1 : 1)
8u4910 Boom Ar-Hoe-Part 2 Of 2
8u4910 Boom Ar-Hoe-Part 1 Of 2
5w7078 Bracket Gp-Hammer Mntg (W/Holes)
5w7076 Bracket Gp-Hammer Mntg (W/Holes)
5W***76Bracket Group-Hammer Mntg (W/Holes)1
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5w0670 Bucket As.-Brg & (Dozer 2400 Mm)
5w0669 Bucket As.-Brg & (Dozer 2000mm)
5w0604 Bucket As.-Ditch Clng (1800mm)
5W***04Bucket As.-Ditch Clng; -Ditch Cleaning1
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5w0603 Bucket As.-Ditch Clng (1500 Mm)
5w0694 Bucket As.-Ditch Clng (2400mm)
5w0605 Bucket As.-Ditch Clng (2000mm)
5W***05Bucket As.-Ditch Clng; -Ditch Cleaning1
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5w0576 Bucket Gp-Rock (750mm W/Teeth)
5w0579 Bucket Gp-Rock (1000mm W/Teeth)
5w0575 Bucket Gp-Rock (600mm W/Teeth)
5w2857 Bucket Gp.-Dozer (2000 Mm)
5w0581 Bucket Gp.-G.P. (600mm W/Teeth)
5w0668 Bucket Gp.-Dozer (2400)
5w0580 Bucket Gp.-G.P. (500mm W/Teeth)
5w0693 Bucket Gp. (Ditch Clng) (2400 Mm)
5w0589 Bucket Gp.-Brg & (Ditch Clng) (1500 Mm)
5W***89Bucket Group.-Bearing & (Ditch Clng)1
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5w0590 Bucket Gp.-Brg & (Ditch Clng) (1800)
5W***90Bucket Group.-Bearing & (Ditch Clng)1
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5w0591 Bucket Gp.-Brg & (Ditch Clng) (2000 Mm)
5W***91Bucket Group.-Bearing & (Ditch Clng)1
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5w0633 Bucket Gp.-Drainage (380 Mm)
5w0635 Bucket Gp.-Drainage (280 Mm)
5w0585 Bucket Gp.-G.P. (1000mm W/ Teeth)
5w0584 Bucket Gp.-G.P. (900mm W/ Teeth)
5w0582 Bucket Gp.-G.P. (700mm W/Teeth)
5w0586 Bucket Gp.-G.P. (1100mm W/Teeth)
5w0583 Bucket Gp.-G.P. (800mm W/Teeth)
5w0587 Bucket Gp.-G.P. (1200mm W/Teeth)
8u6489 Connection Gp-Hammer (2300,2600,2800)
8u6487 Connection Gp-Hammer (1600)(Hi-Low)
8u6491 Connection Gp-Hammer (Krupp)
8U***91Connection Group-Hammer (Krupp)1
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8u6493 Connection Gp-Hammer (Krupp)
8U***93Connection Group-Hammer (Krupp)1
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8u7537 Connection Gp-Hammer (Mont)
8u6475 Control Gp-Lines & (H.A.B.) (Range)
8u6485 Control Gp-Lines & (1pc) (Range)
8u4855 Cylinder Gp
8u4854 Cylinder Gp-Linkage &
5w2482 Cylinder Gp.
5w6539 Hammer As.-Hyd (Krupp Hm 701)
5w6947 Hammer As.-Hyd (Krupp Hm 550)
5W***47Hammer As.-Hydraulic (Krupp Hm 550)1
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5w4580 Linkage Ar.-Tilt-Part 1 Of 2
5w4580 Linkage Ar.-Tilt-Part 2 Of 2
8u4940 Stick Gp-Hoe (3300)
8u4942 Stick Gp-Hoe (4000)
8u4931 Stick Gp-Hoe (2300)
8u4929 Stick Gp-Hoe (1600)
8u4935 Stick Gp-Hoe (2800)
8u7661 Stick Gp-Hoe (Mh)
9j3167 Tip Gp -J 300
9j3169 Tip Gp -J 250
8u0973 Valve Gp (Standard)
Cab, Gauges & Accessories
8u7036 Adjuster Gp-Seat (Upper)
8u6993 Adjuster Gp-Seat (Lower)
8u6644 Belt Gp-Seat
8u543 Cab Gp (Lexan)-Part 4 Of 8
8u0181 Cab Gp (Laminated)-Part 6 Of 8
8u0543 Cap Gp (Lexan)-Part 5 Of 8
8u0543 Cap Gp (Lexan)-Part 2 Of 8
8u0181 Cab Gp (Laminated)-Part 8 Of 8
8u0181 Cap Gp (Laminated)-Part 5 Of 8
8u0543 Cab Gp (Lexan)-Part 3 Of 8
8u0181 Cap Gp (Laminated)-Part 2 Of 8
8u0181 Cab Gp (Laminated)-Part 1 Of 8
8u0543 Cab Gp (Lexan)-Part 8 Of 8
8u0181 Cab Gp (Laminated)-Part 4 Of 8
8u0543 Cab Gp (Lexan)-Part 1 Of 8
8u0181 Cab Gp (Laminated)-Part 7 Of 8
8u0181 Cab Gp (Laminated)-Part 3 Of 8
8u0183 Cab Gp (920) (Lexan Panes)
8u0543 Cab Gp (Lexan)-Part 6 Of 8
8u0543 Cab Gp (Lexan)-Part 7 Of 8
8u0180 Cab Gp (920) (Glass Panes)
5w7308 Cable Gp-Operator Manual
8u7145 Compressor Gp
8u7167 Condenser Gp
8u7041 Console Gp-Lh
8u7059 Console Gp-Rh
8u7146 Evaporator Gp
8u7000 Frame Gp-Seat
5w9255 Guard Gp-Roof (Fops)
8u7535 Guard Gp-Windshield (Glass)
8u6922 Guard Gp-Windshield (Glass)
8u6919 Guard Gp-Windshield (Lexan)
8u3711 Headrest Gp
8u5337 Heater Gp-Cab-Part 2 Of 2
8u5337 Heater Gp-Cab-Part 1 Of 2
8u5324 Heater Gp-Water-Part 1 Of 2
8u5324 Heater Gp-Water-Part 2 Of 2
5w9239 Lighting Gp-Beacon
8u7147 Lines Gp-A/C
5w9475 Mirror Gp (Lh)
5w9250 Radio Gp
8u5871 Seat Gp-Operator
8u6958 Support Gp-Seat
8u7008 Suspension Gp-Seat
8u2511 Visor Gp - Rain
5w9656 Windshield Gp (For Glass Cab)-Part 2 Of 2
5w9656 Windshield Gp (For Glass Cab)-Part 1 Of 2
Windshield Gp (For Lexan Cab)-Part 2 Of 2
Windshield Gp (For Lexan Cab)-Part 1 Of 2
Chassis & Undercarriage
8u6257 Baffle Gp (Sound)
8u5266 Box Gp-Battery
8u5248 Box Gp-Storage-Part 2 Of 2
8u5248 Box Gp-Storage-Part 1 Of 2
8u4431 Counterweight Gp (3000kg)
8u4430 Counterweight Gp (2500 Kg)
5w7304 Drive Gp-Final
8u5315 Drive Gp-Final
8u4978 Drive Gp-Swing
8u6169 Frame Ar-U/C (Lc-Narrow)-Part 3 Of 5
8u6169 Frame Ar-U/C (Lc-Narrow)-Part 4 Of 5
8u6169 Frame Ar-U/C (Lc-Narrow)-Part 1 Of 5
8u6169 Frame Ar-U/C (Lc-Narrow)-Part 2 Of 5
8u6169 Frame Ar-U/C (Lc-Narrow)-Part 5 Of 5
8u5311 Frame Ar-Undercarriage (Lc-W)-Part 4 Of 5
8u5311 Frame Ar-Undercarriage (Lc-W)-Part 3 Of 5
8u5311 Frame Ar-Undercarriage (Lc-W)-Part 5 Of 5
8u5311 Frame Ar-Undercarriage (Lc-W)-Part 2 Of 5
8u5311 Frame Ar-Undercarriage (Lc-W)-Part 1 Of 5
8u5268 Frame Ar-Upper-Part 2 Of 3
8u5268 Frame Ar-Upper-Part 3 Of 3
8u5268 Frame Ar-Upper-Part 1 Of 3
8u6593 Guard Gp-Swing Gear & Pinion
8U***93Guard Group-Swing Gear & Pinion1
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8u7144 Hood Gp-Guard &-Part 2 Of 2 (Air Conditioning System)
8u7144 Hood Gp-Guard & (Air Condition System)-Part 1 Of 2
8u4435 Hood Gp-Guard &-Part 2 Of 2
8u4435
8r7396 Idler Gp-Front
8u7362 Mirros Gp-Rh
8u5271 Motor Gp-Swing
8u4443 Platform Gp-Part 1 Of 2
8u4443 Platform Gp-Part 2 Of 2
8e7494 Roller Gp-Sflg
6k9880 Roller Gp
6K***80Roller Group-Track Carrier; (Upper)1
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5w9846 Swivel Gp-Part 2 Of 2
5w9846 Swivel Gp-Part 1 Of 2
8e3343 Track Gp (900mm)(35.433in) Lc
6t0512 Track Gp (500mm)(19.685in) Lc
6T***12Track Group; Track Group-508mm (20 In.) Triple1
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8e3344 Track Gp (1000mm)(39.370in) Lc-W
8e3341 Track Gp (600mm)(23.622in) Lc
8e3342 Track Gp (750mm)(29.527in) Lc
8u6577 Motor Gp-Hydraulic-Part 2 Of 2
8u6577 Valve Gp-Hydraulic-Part 1 Of 2
Cooling System
4w4869 Cooler Gp-Engine Oil
4W***69Cooler Group-Engine Oil; Engine Oil Cooler Group1
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4w5428 Drive Gp-Water Pump
4W***28Drive Group-Water Pump; Water Pump Drive Group1
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7e4851 Lines Gp-Water
7c4508 Pump Gp-Water
4w7589 Pump Gp-Water
Decals
9x8818 Lubricant Gp-Paint & (German)
9x8816 Lubricant Gp-Paint & (Spanish)
9x2953 Lubricant Gp-Paint & (English)
9x8819 Lubricant Gp-Paint & (Italian)
9x8817 Lubricant Gp-Paint & (Portuguese)
9x8815 Lubricant Gp-Paint & (French)
Electrical System
8u6591 Alarm Gp-Travel
8u6099, 8u6100, 8u6101 Cable Gp-Battery
8u6320 Guard Gp-Headlight
8u7343 Harness Gp
8u5868 Harness Gp
8u5301 Harness Gp
5w8944 Harness Gp
8u5042 Harness Gp
5w5860 Horn Gp-Air
8u6435 Horn Gp-Warning (Adtl)
8u6438 Lighting Gp-Eng Compart
8u6432 Lighting Gp-Boom (1 Pc)
8u6322 Lighting Gp-Boom (H.A.B.)
8u6316 Lighting Gp-Boom (Lh)
8u6433 Lighting Gp-Rear
8u6342 Panel Gp-Electric-Part 1 Of 2
8u6342 Panel Gp-Electric-Part 2 Of 2
8u6341 Panel Gp-Instrument
8u6590 Washer Gp-Windshield
8u4448 Wiring Gp-Battery-Part 3 Of 4
8u4448 Wiring Gp-Battery-Part 2 Of 4
8u4448 Wiring Gp-Battery-Part 4 Of 4
8u4448 Wiring Gp-Battery-Part 1 Of 4
8u4449 Wiring Gp-Gage & (Cab)
Engine Arrangement
9y1549 Engine Ar-Part 1 Of 2
1N***76Filter Group-Fuel1
1N***77Breather Group; Breather Group1
1W***97Cover Group-Cylinder Block; Cylinder Block Cover Group1
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9y1549 Engine Ar-Part 2 Of 2
1W***32Pan Group-Oil1
1W***98Manifold Group-Exhaust; Exhaust Manifold Group1
4W***16Seal Group-Crankshaft1
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Engine Installation
8u5560 Regulator Gp / 8u3874 Manifold Gp-Pt 2 Of 2
8U***74Regulator Group, Manifold Group1
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8u5560 Regulator Gp / 8u3874 Manifold Gp-Pt. 1 Of 2
8U***74Regulator Group, Manifold Group1
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8u3863 Valve Gp
8u6731 Aid Gp-Ether Starting
8u0950 Coupling Gp
8u5650 Filter Gp-Air
8u4243 Frame Ar-Engine (Mounting)-Part 1 Of 4
8u4243 Frame Ar-Engine (Mounting)-Part 2 Of 4
8u4243 Frame Ar-Engine (Mounting)-Part 4 Of 4
8u4243 Frame Ar-Engine (Mounting)-Part 3 Of 4
8u5250 Muffler Gp
8u4670 Pump Gp-Hyd-Part 1 Of 2
8u4670 Pump Gp-Hyd-Part 2 Of 2
Fuel System & Governors
8u6291 Cable Gp-Governor
8u7583 Cable Gp-Governor Control
5w8633 Pump Gp-Fuel Filler
5W***33Pump Group-Fuel Filler; -Refueling1
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8u6274 Pump Gp-Refueling
Fuel System And Governor
7w8600 Control Gp-Fuel Injection
7W***00Control Group-Fuel Injection; Fuel Injection Control Group1
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7c5201 Control Gp-Governor
7e1524 Control Gp-Governor
7w8179 Drive Gp-Governor & Transfer Pump
7W***79Drive Group-Gov & Transfer Pump1
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4p0666 Drive Gp-Governor & Transfer Pump
4P***66Drive Group-Gov & Transfer Pump1
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6i0232 Drive Gp-Governor & Transfer Pump
6I***32Drive Group-Gov & Transfer Pump1
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4p4775 Drive Gp-Governor & Transfer Pump-Flexible Drive
4P***75Drive Group-Gov & Transfer Pump1
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4p5614 Drive Gp-Governor & Transfer Pump
4P***14Drive Group-Gov & Transfer Pump1
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7w4812 Fastener Gp-Governor
7W***12Fastener Group-Governor; Fastener Group(Governor) (~1c K5811)1
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1n3476 Filter Gp-Fuel
7w8178 Governor Gp
7W***78Governor Group; Governor Group (Unit Injector) (2zf559~2zf3962)1
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4p1583 Governor Gp
6i0230 Governor Gp
4p4776 Governor Gp-Unit Injector
4p8154 Governor Gp-Unit Injector
4p5791 Governor Gp-Unit Injector
4P***91Governor Group-Unit Injector; Governor Group (Unit Injector) (2zf3963-Up)1
4P***54Governor Group-Unit Injector1
7E***97Governor Group-Unit Injector1
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7c4567 Governor Gp-Unit Injector
4p5502 Governor Gp-Unit Injector
7e3697 Governor Gp-Unit Injector
9y3943 Lines Gp-Air Fuel Ratio Control
9Y***43Lines Group-Air Fuel Ratio Cont; Air Fuel Ratio Control Lines Group1
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7w9854 Lines Gp-Fuel Filter
7w8434 Lines Gp-Governor Oil
7W***34Lines Group-Governor Oil; Governor Oil Lines Group1
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7e7607 Pump Gp-Fuel Injection
7E***07Pump Group-Fuel Injection; Fuel Injection Pump Group1
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7e9572 Fuel Priming Pump & Primary Filter Gp
7E***72Pump Group-Fuel Prime & Prim Filter; Fuel Priming Pump & Primary Filter Gp1
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Gauges And Accessories
4p2935 Instrument Gp
Hydraulic System
8u6197 Boom Ar-Hoe (Lines &) (H.A.B.)-Part 3a Of 4
8u6197 Boom Ar-Hoe (Lines &) (H.A.B.)-Part 3 Of 4
8u6197 Boom Ar-Hoe (Lines &) (H.A.B.)-Part 4 Of 4
8u6197 Boom Ar-Hoe (Lines &) (H.A.B.)-Part 2 Of 4
8u6197 Boom Ar-Hoe (Lines &) (H.A.B.)-Part 1 Of 4
8u6288 Control Gp-Engine Speed
8u0336 Control Gp-Hand
8u4447 Control Gp-Implement-Part 2 Of 3
8u4447 Control Gp-Implement-Part 3 Of 3
8u4447 Control Gp-Implement-Part 1 Of 3
8u6531 Control Gp-Lines &
8u6168 Control Gp-Solenoid
8u5406 Cyl Gp-Lines & (W/Check Valve)-Part 2 Of 2
8u5406 Cyl Gp-Lines &(W/Check Valve)-Part 1 Of 2
8u4385 Cyl Gp-Lines &(Boom)(W/O Check Valve)
8u6393 Cyl Gp-Valve &
8u4951 Cylinder Gp
8u4859 Cylinder Gp
8u6306 Cylinder Gp
8u5405 Cylinder Gp
8u5408 Cylinder Gp-Boom (Rh)
8u5407 Cylinder Gp-Boom (Lh)
8u5402 Cylinder Gp-Boom (Rh)(W/O Check Valve)
8u5401 Cylinder Gp-Boom (Lh)(W/O Check Valve)
8u4368 Cylinder Gp-Foreboom
8u6196 Cylinder Gp-Foreboom
8u4950 Cylinder Gp-Stick
8u5044 Filter Gp
8u0198 Filter Gp
8u0189 Filter Gp
8u6418 Housing Gp-Solenoid
8u7204 Indicator Gp-Lift(Boom Load)(W/O Check Valve)
8u7207 Indicator Gp-Lift(Boom Load)(W/Check Valve)
8U***07Indicator Group-Lift(Boom Load)(W/Check Valve)1
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8u6395 Lines Gp-1 Pc Boom + Hydraulic Hammer
8u6392 Lines Gp-1 Pc Boom
8u7097 Lines Gp-Anti-Drift (Boom Cyl)
8u7093 Lines Gp-Anti-Drift (Stk Cyl)
8U***93Lines Group-Anti-Drift (Stk Cyl)1
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8u6230 Lines Gp-Hammer (1 Pc Boom)
8u6212 Lines Gp-Hammer (1600)
8u6482 Lines Gp-Hammer (H.A.B.)
8u6222 Lines Gp-Hammer (2800)
8u6221 Lines Gp-Hammer (2300)
8u4445 Lines Gp-Hyd-Part 3 Of 3
8u4944 Lines Gp-Hyd (2300)
8u4445 Lines Gp-Hyd-Part 1 Of 3
8u6473 Lines Gp-Hyd(Adtl Func)(H.A.B.)
8u4946 Lines Gp-Hyd (2800)
8u6934 Lines Gp-Hyd (Adtl Func W/O Bkt Cyl)
8u4926 Lines Gp-Hyd (1 Pc Boom)
8u5085 Lines Gp-Hyd (1600)
8u4445 Lines Gp-Hyd-Part 2 Of 3
8u4952 Lines Gp-Hyd (Special Function)
8u5087 Lines Gp-Hyd (4000)
8u4948 Lines Gp-Hyd (3300)
8u4446 Lines Gp-Pilot-Part 2 Of 2
8u4446 Lines Gp-Pilot-Part 1 Of 2
8u4444 Lines Gp-Pump-Part 1 Of 2
8u4444 Lines Gp-Pump-Part 2 Of 2
8u4937 Lines Gp-Stick (2800)
8u4968 Lines Gp-Stick (3300)
8u4933 Lines Gp-Stick (2300)
8u6399 Lines Gp-Stick (H.A.B.)
8u4970 Lines Gp-Stick (4000)
8u5090 Lines Gp-Stick (1600)
8u6509 Lines Gp-Valve &
8u6528 Lines Gp-Valve & (H.A.B.)
8u7523 Linkage Gp-Pedal Stop (H.A.B.)
8U***23Linkage Group-Pedal Stop (H.A.B.)1
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8u6515 Manifold Gp
8u6497 Manifold Gp
8u6501 Pedal Gp (H.A.B.)
8u6498 Plate Gp
8u6573 Plug Gp-Hydraulic Hammer
8u7392 Pump Gp-Gear (Cooling)
8u2592 Switch Gp-Overload
8u4669 Tank Gp-Hyd
8u6555 Valve Gp
8u6547 Valve Gp
8u5400 Valve Gp
8u6572 Valve Gp
8u2284 Valve Gp (Pressure Cut Off)
8u4813 Valve Gp
5w9422 Valve Gp
8u1068 Valve Gp
8u6549 Valve Gp
8u5382 Valve Gp
8u6478 Valve Gp
8u6552 Valve Gp
8u4634 Valve Gp
8u1328 Valve Gp
8u6499 Valve Gp (Adtl Function)
8u7094 Valve Gp-Check
8u6192 Valve Gp-Check
8u1944 Valve Gp-Diverter
8u6441 Valve Gp-Solenoid
8u6282 Valve Gp-Solenoid
8u0117 Lever As-Steering-Part 1 Of 3
8u0117 Lever As-Steering-Part 2 Of 3
8u0117 Lever As-Steering-Part 3 Of 3
Lubrication System
1n3477 Breather Gp
7c0896 Filter Gp-Engine Oil
7C***96Filter Group-Engine Oil; Engine Oil Filter Group1
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7w8420 Fumes Disposal Gp
7W***20Fumes Disposal Group; Fumes Disposal Group1
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9y8240 Gauge Gp-Oil Level (Dipstick)
9Y***40Gauge Group-Oil Level (Dipstick); Oil Level Gauge Group(Dipstick) (~1c K4294)1
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7c0897 Lines Gp-Engine Oil
4w4951 Pump Gp-Engine Oil
7w8599 Pump Gp-Engine Oil
Starting And Electrical System
7c1683 Alternator Gp
7C***83Alternator Group-Charging; Charging Alternator Group (24v, 55a)1
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9w3043 Alternator Gp
9W***43Alternator Group-Charging; (24-Volt, 52-Ampere)1
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9x5524 Solenoid As-Latching
7c4028 Solenoid Gp-Shut-Off
9w3748 Starting Motor Gp-Electric
7c5731 Starting Motor Gp-Electric
7C***31Starting Motor Group-Electric; Starting Motor Group (Electric) (24v)1
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211B serial number reference

The PIN/serial plate on a 211B is on the right side of the cab structure, below the window. Machines built near the model's early-1990s introduction may carry a second tag near the operator's seat as the cab door is opened, or on the cab floor by the operator's right foot. The plate shows an eight-character PIN: the first three characters are the prefix identifying model and series — 6XG for the 211B family — followed by a five-digit sequential unit number, e.g. 6XG00001.

PrefixIdentifies
6XG211B and 211B LC (long/wide-undercarriage option)

Frequently asked questions

What engine powers the Caterpillar 211B?

The 211B runs the Cat 3114, a turbocharged 4.4L four-cylinder diesel rated about 105 hp gross (78 kW). It is mechanically governed with no electronic engine controls, replacing the naturally aspirated, Perkins-based engine used in the original 211.

What is the operating weight of the Caterpillar 211B?

Operating weight is about 15,750 kg (34,723 lb) in LC (wide-track) configuration. Weight varies by undercarriage width, boom/stick length, and attachments, so check the exact machine configuration against factory literature for a precise figure.

What replaced the Caterpillar 211B?

Caterpillar replaced the 211B with the 311 starting in 1994, later refined as the 311B from 1997 onward, as part of Caterpillar's move to its next-generation mid-size excavator lineup.

What 211B owners discuss

How does the Cat 3114 turbo engine in the 211B hold up, and what do mechanics say about tuning it?
The 211B runs the mechanically governed Cat 3114 turbocharged diesel, rated around 78 kW (105 hp) at the flywheel on most spec sheets; some listings show different gross figures, so confirm for your serial range. Mechanics familiar with this engine family flag injection timing and fuel rack setting as finicky. Get it slightly off and one cylinder can overfuel, running hot enough to damage the turbo or a piston. Rack and timing setup needs the correct Cat tooling, not trial and error. An experienced tech does the job in under an hour; a DIY attempt can take most of a day and still be wrong. A cold engine that needs a healthy shot of ether, then stumbles and smokes for a minute before smoothing out, is considered normal for this fuel system. Have your dealer or an experienced diesel shop verify timing and rack settings before accepting a "runs rough when cold" excuse from a seller.
What hydraulic behavior is normal versus a red flag on the 211B?
The 211B uses a single main variable-displacement pump with load-sensing control, a hydro-mechanical layout with no electronic pump management. One pump feeds every function, so combined movements like boom, swing, and travel together naturally slow down compared to running one function alone. That is normal, not a leak. Overheated oil, jerky or hesitant cylinder movement, and a noticeable pressure drop point to internal pump wear or fluid contamination instead. Check the pump compartment, cylinder rod seals, and the swing swivel joint for weeping. The pump and load-sensing valve share service history with the 205B, 206B FT, and 212B FT of the same era and wear the same way.
What causes overheating and head gasket trouble on this engine family, and what is the warning sign?
Overheating drives most head gasket failures and warped heads on the 3114 family. A plugged radiator core, low coolant, or a slipping fan drive is enough over time. As these engines accumulate rebuilds, the cylinder head and block deck get resurfaced, which lowers deck height. A later rebuild can then need a thicker, oversized head gasket instead of the original spec, something a shop unfamiliar with this engine can miss. The telltale symptom owners report is coolant showing up in the fuel or fuel turning up in the coolant, pointing to a cracked head rather than a simple gasket seep. Have your dealer or engine shop pressure-test the cooling system and check for fuel/coolant cross-contamination before a straight gasket swap.
What undercarriage and final-drive wear should I expect on a used 211B?
As with other Cat excavators of this era, the most common final-drive complaint is a face seal weeping gear oil where the motor meets the sprocket. It is rarely the motor failing outright; it is debris packed around the drive prying the seal out of its bore. Machines pressure-washed regularly around the tracks hold up noticeably better than ones left caked in mud. Owners of similar-class Cat excavators describe the machine as dependable as long as the undercarriage is in reasonable shape, meaning worn rollers, stretched chain, and thin sprockets are the real cost driver on a used unit, not the base machine. The 211B also has an adjustable-width undercarriage from the factory; check that the width-adjust mechanism and its hydraulics move freely and do not leak.
What electrical or gauge issues come up on this generation of Cat excavator?
This is a pre-electronic-control machine. Gauges and warning lights run off simple senders, not an engine computer, so troubleshooting is closer to older automotive work than modern fault-code diagnostics. Recurring complaints are corroded or moisture-packed connectors, harness sections chafed through their insulation, and charging-system faults such as a weak alternator or bad ground that get misdiagnosed as a bad battery. A failing coolant-temperature sender or oil-pressure switch is a common source of false gauge readings and can also affect cold-start behavior, since the fuel system references coolant temperature for cold-start enrichment. Chase grounds and connectors first before replacing senders.
Is the swing system a known weak point on this class of Cat excavator?
Worn swing bearings and tired swing gearboxes turn up repeatedly as one of the pricier repairs on this size of Cat excavator. Owners describe a failing gearbox as expensive enough to shop hard for a good used replacement rather than pay full rebuild pricing. Warning signs are grinding or clicking during rotation, noticeable play when rocking the house against the undercarriage, or jerky, uneven swing instead of smooth rotation. Grease or oil weeping around the bearing seal is an early sign worth chasing before it turns into bearing play. A worn slew ring affects structural stability of the upper structure. Have your dealer measure bearing play against factory tolerance rather than relying on a feel test alone.
What should I check before buying a used 211B?
Start with the structure. Look for cracked or repaired welds at the boom-to-stick and stick-to-bucket pivots, and anywhere plates have been doubled up, which signals a prior structural failure. Run the engine cold if possible. Some ether use and a rough, smoky start for the first minute is normal for this mechanically injected engine, but excessive ether or smoke that never cleans up once warm means budget for injector or timing work. Open the pump compartment and check hoses, cylinder rod seals, and the swing bearing and swivel joint for leaks or play, then rock the house against the undercarriage to feel for slew ring slop. Walk the tracks and check roller, idler, and sprocket wear along with final-drive seals for gear-oil weeping. This is an older, lower-volume platform, so ask for service records and confirm parts support with your dealer before committing. Major components such as the hydraulic pump, engine, and undercarriage are shared with the 205B, 206B FT, and 212B FT of the same era, which helps sourcing. Have your dealer verify slew ring tolerance and engine compression and timing before final purchase.

Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.

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