Caterpillar 206B
Caterpillarexcavator

Caterpillar 206B

Maintenance schedule, common problems & OEM parts breakdown

The Caterpillar 206B is a wheel excavator positioned in the smallest machine segment for its class. Produced between 1991 and 1996, this machine features a 78 kW (104 hp) Caterpillar 3114 DIT turbocharged engine. It operates with an approximate weight of 13.4 t (13.4 t) and offers a bucket capacity of 0.6 m³ (0.6 m³). The B-series configuration provides improved performance over the predecessor 206, including load-sensing hydraulics, increased digging depth, and up to 75% faster travel speeds.

The transition from the standard 206 to the 206B introduced a single main pump design and enhanced lift capacities, making it a more efficient unit for utility and urban work. In today's used market, the 206B remains a relevant asset for tasks requiring mobility and versatile setup. Its value is driven by its ability to handle waste handling, road work, and material handling with high maneuverability; however, maintenance of the hydraulic system and engine components is critical for preserving residual value.

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 206B specifications

Engine

Engine Model3114 DIT (turbocharged)
Gross Power78 kW (105 hp)
Displacement268.6 cu in

Weights

Operating Weight13.4 t (approx. 29,542 lb)

Dimensions

Overall Width8.18 in (varies by configuration; 8.12 in reported for standard 206)
Wheelbase7.88 ft
Ground Clearance1.17 ft
Height to Top of Cab10.16 ft
Upper Structure Clearance3.99 in

Performance

Max Digging DepthVaries by configuration/series: 14.01 ft (Stick 5'3"), 15.65 ft (Stick 6'11"), 17.26 ft (Stick 8'6"), 18.9 in (Stick 10'2")
Max Cutting HeightVaries by configuration/series: 25.56 ft (Stick 5'3"), 26.02 ft (Stick 6'11"), 26.09 ft (Stick 8'6"), 26.88 ft (Stick 10'2")
Max Loading HeightVaries by configuration/series: 17.98 ft (Stick 5'3"), 18.54 ft (Stick 6'19"), 18.77 ft (Stick 8'6"), 19.59 ft (Stick 10'2")
Max Reach Along GroundVaries by configuration/series: 24.05 ft (Stick 5'3"), 26.19 ft (Stick 6'11"), 27.53 ft (Stick 8'6"), 29.14 ft (Stick 10'2")
Max Vertical Wall Dig DepthVaries by configuration/series: 10.67 ft (Stick 5'3"), 11.49 ft (Stick 6'11"), 11.65 ft (Stick 8'6"), 13.1 ft (Stick 10'2")
Hydraulic Pump Flow Capacity52.9 gal/min
Hydraulic System Relief Valve Pressure4640 psi

Forces

Bucket Capacity0.6 m³

Service capacities (summary)

Fuel Capacity56.8 gal
Hydraulic System Fluid Capacity52.9 gal

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

206B fluids & capacities

SystemCapacityRecommended fluid
Engine crankcase (with filter)Not specifiedCat DEO or Cat DEO-ULS; use SAE 10W-30 for temperatures between -18°C and 40°C (0°F to 104°F). Use SAE 0W-40 for extreme cold (-40°C) or SAE 15W-4/SAE 50 for hot climates.
Fuel tank216.51 liters (57.2 gal)Not specified
GreaseNot specifiedCat Multipurpose, Advanced 3Moly, Ultra 5Moly, Desert Gold (hot weather), or Arctic Platinum (cold weather) as application requires.

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

Caterpillar 206B maintenance schedule

Service intervalTasks
Every 10 h
  • Check engine oil level and condition
  • Inspect hydraulic fluid level via sight glass
  • Verify coolant level and cap integrity
  • Drain water from fuel/water separator
  • Inspect air filter restriction indicator
  • Check for visible fluid leaks under machine
Every 250 h
  • Change engine oil and filter
  • Grease all boom, stick, bucket, and swing points
  • Drain fuel water separator
  • Perform visual inspection of belts and hoses
  • Check air filter primary element
Every 500 h
  • Replace fuel filter
  • Replace hydraulic return filter
  • Perform battery service and terminal check
  • Conduct detailed undercarriage inspection
  • Test coolant SCA levels
Every 1,000 h
  • Perform hydraulic oil sample analysis (S.O.S)
  • Inspect turbocharger for wear or leaks
  • Check ROPS bolt torque
  • Measure undercarriage component wear
  • Clean or replace air filter primary element
Every 2,000 h
  • Change hydraulic system oil
  • Perform coolant flush and replacement
  • Service transmission/final drive oil
  • Conduct comprehensive structural inspection of boom and stick welds
  • Evaluate major machine components

Servicing the 206B beyond the schedule

Predictive Maintenance & Fluid Analysis

Utilize Caterpillar S.O.S Services to monitor engine oil, hydraulic fluid, and coolant. Analyze engine oil for wear metals like iron or copper and contaminants such as silicon from dirt ingestion. For the hydraulic system, track particle counts and water content to prevent pump failure. Regular coolant analysis is necessary to check pH levels and SCA concentration, preventing internal liner pitting and overheating.

Corrective & Common Repairs

Monitor for hydraulic leaks or hose abrasions that lead to pressure drops and cavitation. Inspect the 3114T engine for signs of turbocharger failure or fuel dilution. Address any identified air leaks in the intake system immediately to prevent dust ingestion. If milky oil is observed on the dipstick, investigate potential head gasket failure causing coolant contamination into the lubrication system.

Overhaul & Rebuild Points

Plan for major component evaluation during 2,000-hour intervals. Focus on structural inspections of boom and stick welds to identify fatigue. Inspect final drive and swing drive gears for excessive wear or play. When rebuilding the undercarriage, measure sprocket and shoe wear to prevent costly secondary damage to mating parts. Evaluate the condition of all pins and bushings for replacement if play exceeds factory tolerances.

Seasonal & Environment Servicing

In dusty or quarry environments, check air filters daily and clean radiator/oil cooler fins frequently to prevent overheating. For high-temperature operations, consider shortening engine oil drain intervals. In cold climates, ensure the use of appropriate SAE 10W-30 or 15W-40 engine oils for reliable starting. Always inspect hydraulic hoses for cracks or brittleness caused by extreme temperature fluctuations.

206B fault codes & troubleshooting

CodeMeaningLikely causeWhat to do
110-3Engine Coolant Temperature Sensor — Voltage HighOpen circuit or sensor failureCheck wiring; replace sensor if confirmed faulty
174-3Engine Fuel Temperature — Voltage Above NormalOpen circuit in sensor wiringInspect harness and replace sensor if necessary
190-8Engine Speed — Abnormal FrequencySpeed sensor air gap, sensor failure, or tone ring damageCheck sensor gap; test speed sensor and tone ring
41-38-Volt DC Supply — Voltage Above NormalShort to power on 8V reference circuitInspect sensors sharing the 8V supply and isolate fault
41-48-Volt DC Supply — Voltage Below NormalShort to ground on 8V reference circuitDisconnect sensors one at a/time to locate short
E360Engine Coolant Temperature — HighLow coolant, failed thermostat, or water pump issueDiagnose cooling system; do not operate until resolved
E361Engine Coolant Temperature — Very High (Shutdown)Severe cooling system failureEngine shutdown required; perform full cooling system diagnosis

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

206B attachments & work tools

Buckets

Standard capacity is 0.6 m³ (0.78 yd³). Options include bolt-on cutting edges or teeth to extend attachment life.

Hydraulic hammers

Compatible with hydraulic impact hammer applications using specialized Hammer Paste Grease.

Quick couplers

Pin Puller Couplers are available to increase machine versatility. S Type Couplers provide a pin grabber style for consistent tight fit and low offset.

Thumbs/grapples

Available multipurpose grapples, such as the G206 and G208 models, can be used with hydromechanical tools.

Rippers

Not documented for this exact serial range — verify with your dealer.

Hydraulic-kit notes

The system features load sensing hydraulics. Relief valve pressure is rated at 4640 psi (320 bar) with a pump flow capacity of 52.9 gal/min (200 L/min).

All 206B assemblies by section

Every catalogued assembly group for the Caterpillar 206B. 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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6i4771 Heater Gp-Air Inlet
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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7e2481 Cylinder Block Gp
7e5311 Cylinder Block Gp
7w5664 Cylinder Head As
9y6164 Cylinder Head As-R
9y8872 Cylinder Head Gp
9Y***72Cylinder Head Group; Cylinder Head Group1
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9y8849 Cylinder Head Gp*R
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 Mechanism Gp-Fuel Pump & Valve
4W***66Mechanism Group-Fuel Pump & Valve1
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1w7632 Pan Gp-Oil
9y8543 Rod & Piston Gp
7c9352 Pulley Gp-Fan
9y8314 Pulley Gp
9y4914 Pulley Gp-Crankshaft
7c6077 Rocker Arm Gp-Valve
4w1016 Seal Gp-Crankshaft
7e5633 Support Gp-Engine
Boom, Sticks, Linkage & Buckets
5w0572 Bkt Gp-Prof (W/Teeth)(600mm 1 : 1.25)
5w0574 Bkt Gp-Prof (W/Teeth)(600mm 1 : 1.5)
5w0573 Bkt Gp-Prof (W/Teeth)(400mm 1 : 1.5)
5w0569 Bkt Gp.-Prof (W/Teeth) (400mm 1 : 1)
5w0570 Bkt Gp.-Prof (W/Teeth) (600mm 1 : 1)
8u4863 Boom Ar-Hoe-Part 1 Of 2
8u4863 Boom Ar-Hoe-Part 2 Of 2
Bracket Gp-Hammer Mntg (W/Holes)
5w7077 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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5w0669 Bucket As.-Brg & (Dozer 2000mm)
5w0670 Bucket As.-Brg & (Dozer 2400 Mm)
5w0603 Bucket As.-Ditch Clng (1500 Mm)
5w0604 Bucket As.-Ditch Clng (1800mm)
5W***04Bucket As.-Ditch Clng; -Ditch Cleaning1
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5w0605 Bucket As.-Ditch Clng (2000mm)
5W***05Bucket As.-Ditch Clng; -Ditch Cleaning1
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5w0694 Bucket As.-Ditch Clng (2400mm)
5w0576 Bucket Gp-Rock (750mm W/Teeth)
5w0579 Bucket Gp-Rock (1000mm W/Teeth)
5w0575 Bucket Gp-Rock (600mm W/Teeth)
5w0668 Bucket Gp.-Dozer (2400)
5w0581 Bucket Gp.-G.P. (600mm W/Teeth)
5w2857 Bucket Gp.-Dozer (2000 Mm)
5w0580 Bucket Gp.-G.P. (500mm W/Teeth)
5w0693 Bucket Gp. (Ditch Clng) (2400 Mm)
5w0590 Bucket Gp.-Brg & (Ditch Clng) (1800)
5W***90Bucket Group.-Bearing & (Ditch Clng)1
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5w0589 Bucket Gp.-Brg & (Ditch Clng) (1500 Mm)
5W***89Bucket 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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5w0635 Bucket Gp.-Drainage (280 Mm)
5w0633 Bucket Gp.-Drainage (380 Mm)
5w0585 Bucket Gp.-G.P. (1000mm W/ Teeth)
5w0582 Bucket Gp.-G.P. (700mm W/Teeth)
5w0584 Bucket Gp.-G.P. (900mm W/ Teeth)
5w0583 Bucket Gp.-G.P. (800mm W/Teeth)
5w0586 Bucket Gp.-G.P. (1100mm W/Teeth)
5w0587 Bucket Gp.-G.P. (1200mm W/Teeth)
8u6493 Connection Gp-Hammer (Krupp)
8U***93Connection Group-Hammer (Krupp)1
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8u7537 Connection Gp-Hammer (Mont)
8u4846 Cylinder Gp
8u4845 Cylinder Gp-Linkage &
5w2482 Cylinder Gp.
Hammer As.-Hyd (Krupp Hm 600)
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
8u8133 Restraint Gp - Bukt Linkage
8u7679 Restraint Gp-Clam (Ger) (Fact)
8u7687 Restraint Gp-Clam (Ger) (Fact)
8u4549 Restraint Gp-Travel
8u7638 Stick Gp-Hoe (2100) Zmw
8u4892 Stick Gp-Hoe (2600)
8u4894 Stick Gp-Hoe (3100)
8u4885 Stick Gp-Hoe (1600)
8u4888 Stick Gp-Hoe (2100)
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
8u0543 Cab Gp (Lexan)-Part 3 Of 8
8u0543 Cab Gp (Lexan)-Part 7 Of 8
8u0183 Cab Gp (920)
8u0181 Cap Gp (Laminated)-Part 5 Of 8
8u0181 Cab Gp (Laminated)-Part 3 Of 8
8u0543 Cap Gp (Lexan)-Part 2 Of 8
8u0180 Cab Gp (920) (Glass Panes)
8u0181 Cab Gp (Laminated)-Part 8 Of 8
8u0181 Cab Gp (Laminated)-Part 4 Of 8
8u0181 Cab Gp (Laminated)-Part 7 Of 8
8u0543 Cab Gp (Lexan)-Part 8 Of 8
8u0183 Cab Gp (920) (Lexan Panes)
8u0181 Cab Gp (Laminated)-Part 1 Of 8
8u0543 Cap Gp (Lexan)-Part 5 Of 8
8u0543 Cab Gp (Lexan)-Part 6 Of 8
8u0543 Cab Gp (Lexan)-Part 4 Of 8
8u0543 Cab Gp (Lexan)-Part 1 Of 8
8u0181 Cap Gp (Laminated)-Part 2 Of 8
8u0181 Cab Gp (Laminated)-Part 6 Of 8
8u0180 Cab Gp (920)
8u7743 Cab Gp-Glass-Part 6a Of 9
8u7743 Cab Gp-Glass-Part 1a Of 9
8u7743 Cab Gp-Glass-Part 7 Of 9
8u7743 Cab Gp-Glass-Part 9 Of 9
8u7743 Cab Gp-Glass-Part 2 Of 9
8u7743 Cab Gp-Glass-Part 6 Of 9
8u7743 Cab Gp-Glass-Part 4 Of 9
8u7743 Cab Gp-Glass-Part 3 Of 9
8u7743 Cab Gp-Glass-Part 1 Of 9
8u7743 Cab Gp-Glass-Part 5 Of 9
8u7743 Cab Gp-Glass-Part 8 Of 9
8u7865 Cab Gp-Lexan-Part 1 Of 9
8u7865 Cab Gp-Lexan-Part 5 Of 9
8u7865 Cab Gp-Lexan-Part 9 Of 9
8u7865 Cab Gp-Lexan-Part 6a Of 9
8u7865 Cab Gp-Lexan-Part 4 Of 9
8u7865 Cab Gp-Lexan-Part 1a Of 9
8u7865 Cab Gp-Lexan-Part 8 Of 9
8u7865 Cab Gp-Lexan-Part 2 Of 9
8u7865 Cab Gp-Lexan-Part 6 Of 9
8u7865 Cab Gp-Lexan-Part 3 Of 9
8u7865 Cab Gp-Lexan-Part 7 Of 9
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)
Guard Gp-Windshield (Lexan)
Guard Gp-Windshield (Lexan)(Air Conditioning System)
8u6922 Guard Gp-Windshield (Glass)
8u7535 Guard Gp-Windshield (Glass)
8u6919 Guard Gp-Windshield (Lexan)
8u3711 Headrest Gp
8u5335 Heater Gp-Cab-Part 1a Of 2
8u5335 Heater Gp-Cab-Part 2 Of 2
8u5335 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
8u6736 Tool Gp-Hand
Tool Gp-Hand
8u2511 Visor Gp - Rain
8u8018 Windshield Gp - Front-Part 1 Of 2
8u8018 Windshield Gp - Front-Part 2 Of 2
8u8019 Windshield Gp - Front
Chassis
8u4459 Axle Ar-Front-Part 3 Of 6
8u4459 Axle Ar-Front-Part 1 Of 6
8u4459 Axle Ar-Front-Part 5 Of 6
8u4459 Axle Ar-Front-Part 4 Of 6
8u4459 Axle Ar-Front-Part 2 Of 6
8u4459 Axle Ar-Front-Part 6 Of 6
8u5918 Axle Gp-Rear-Part 2 Of 2
8u5918 Axle Gp-Rear-Part 1 Of 2
8u6086 Transmission Gp-Part 1 Of 10
8u6086 Transmission Gp-Part 4 Of 10
8u6086 Transmission Gp-Part 8 Of 10
8u6086 Transmission Gp-Part 5 Of 10
8u6086 Transmission Gp-Part 7 Of 10
8u6086 Transmission Gp-Part 6 Of 10
8u6086 Transmission Gp-Part 10 Of 10
8u6086 Transmission Gp-Part 9 Of 10
8u6086 Transmission Gp-Part 2 Of 10
8u6086 Transmission Gp-Part 3 Of 10
Chassis & Undercarriage
8u7594 Valve Gp
8u2202 Valve Gp / 8u2212 Valve Gp
8u6257 Baffle Gp (Sound)
8u4513 Blade Gp-Dozer(Pin-On)(Front Or Rear)-Part 1 Of 2
8u4513 Blade Gp-Dozer(Pin-On)(Front Or Rear)-Part 2 Of 2
8u9094 Box Gp-Battery
8u5266 Box Gp-Battery
8u6271 Box Gp-Storage
8u1618 Bracket Gp-Towing
8u4430 Counterweight Gp (2500 Kg)
8u4429 Counterweight Gp (1800 Kg)
8u5708 Cylinder Gp (Single Acting)
8u4461 Cylinder Gp
8u1410 Cylinder Gp
8u4533 Cylinder Gp
8u4978 Drive Gp-Swing
8u4450 Frame Ar-Undercarriage-Part 1b Of 3
8u4450 Frame Ar-Undercarriage-Part 1 Of 3
8u4450 Frame Ar-Undercarriage-Part 2 Of 3
8u4450 Frame Ar-Undercarriage-Part 1a Of 3
8u4450 Frame Ar-Undercarriage-Part 3 Of 3
8u4796 Frame Ar-Upper-Part 2b Of 3
8u4796 Frame Ar-Upper-Part 2a Of 3
8u4796 Frame Ar-Upper-Part 2 Of 3
8u4796 Frame Ar-Upper-Part 1 Of 3
8u4796 Frame Ar-Upper-Part 3 Of 3
8u4796 Frame Ar-Upper-Part 3a Of 3
8u4451 Frame Gp-Dozer
8u5823 Frame Gp-U/C (Pin On)
8u4532 Guard Gp-Cylinder
8u6593 Guard Gp-Swing Gear & Pinion
8U***93Guard Group-Swing Gear & Pinion1
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8u4465 Hood Gp-Guard &-Part 2a Of 2
8u4465 Hood Gp-Guard &-Part 1a Of 2
8u4465 Hood Gp-Guard &-Part 2 Of 2
8u4465 Hood Gp-Guard &-Part 1 Of 2
8u7142 Hood Gp-Guard &-Part 1 Of 2 (Air Conditioning System)
8U***42Hood Group-Guard & (Air Condition)1
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8u7142 Hood Gp-Guard &-Part 1a Of 2 (Air Conditioning System)
8U***42Hood Group-Guard & (Air Condition)1
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8u7142 Hood Gp-Guard &-Part 2 Of 2 (Air Conditioning System)
8U***42Hood Group-Guard & (Air Condition)1
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8u7142 Hood Gp-Guard &-Part 2a Of 2 (Air Conditioning System)
8U***42Hood Group-Guard & (Air Condition)1
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8u7362 Mirror Gp-Rh
8u7592 Motor Gp-Hyd-Part 2 Of 2
8u7592 Motor Gp-Hyd-Part 1 Of 2
8u5251 Motor Gp-Swing
8u5706 Pedal Gp-Brake
8u5665 Platform Gp-Part 3 Of 3
8u5665 Platform Gp-Part 1b Of 3
8u5665 Platform Gp-Part 1a Of 3
8u5665 Platform Gp-Part 1c Of 3
8u5665 Platform Gp-Part 2 Of 3
8u5665 Platform Gp-Part 1 Of 3
8u4688 Pump Gp-Metering
5w3832 Reflector Gp
8u6723 Ring Gp-Tire Type 1 (26-40mm)
8u6727 Ring Gp-Tire Type 3 (51-60mm)
8u6725 Ring Gp-Tire Type 2 (41-50mm)
8u7101 Sender Gp-Temp (Trans)
8u4462 Shaft Gp-Drive
8u5909 Stabilizer Gp (Pin On)Front Or Rear
8u5265 Box Gp-Storage-Part 2 Of 2
8u5265 Box Gp-Storage-Part 1 Of 2
8u9212 Swivel Gp-Part 2 Of 2
8u9212 Swivel Gp-Part 1 Of 2
8u5827 Swivel Gp-Part 1 Of 2
8u9146 Swivel Gp-Part 2 Of 2
8u5827 Swivel Gp-Part 2 Of 2
8u9146 Swivel Gp-Part 1 Of 2
5w6821 Tire Gp-Rim & (10.00-20 New)
5w7085 Tire Gp-Rim & (10.00-20 New)(Dunlop)
5w7088 Tire Gp-Rim & (10.00r20 New)(Michelin)
5w6818 Tire Gp-Rim & (9.00-20 New)
5w6824 Tire Gp-Rim & (Super Single)
5w7083 Tire Gp-Rim & (9.00r20 New)(Michelin)
8u5707 Valve Gp-Brake
8u5846 Valve Gp-Control
8u4746 Warning Gp-Road
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
4w7589 Pump Gp-Water
7c4508 Pump Gp-Water
Decals
9x2948 Lubricant Gp-Paint & (Spanish)
9x2949 Lubricant Gp-Paint & (Portuguese)
9x2951 Lubricant Gp-Paint & (Italian)
9x2947 Lubricant Gp-Paint & (French)
9x2950 Lubricant Gp-Paint & (German)
9x2946 Lubricant Gp-Paint & (English)
9X***46Lubricant Group-Paint & (English)1
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Electrical System
8u6592 Alarm Gp-Travel
8u7432 Cable Gp
8u6099, 8u6100, 8u6101 Cable Gp-Battery
8u6281 Control Gp-Max Travel Spd
8u6320 Guard Gp-Headlight
8u8060 Harness Gp-Part 1 Of 2
5w8945 Harness Gp
8u8060 Harness Gp-Part 2 Of 2
8u8084 Harness Gp-Part 3 Of 4
8u9220 Harness Gp-Part 4 Of 4
8u9220 Harness Gp-Part 2 Of 4
8u8084 Harness Gp-Part 4 Of 4
8u8054 Harness Gp-Part 3 Of 4
8u5042 Harness Gp
8u6093 Harness Gp, 8u6094 Harness Gp
8u9221 Harness Gp-Part 1 Of 2
8u5907 Harness Gp
8u8054 Harness Gp-Part 1 Of 4
8u8054 Harness Gp-Part 4 Of 4
8u9220 Harness Gp-Part 3 Of 4
8u8086 Harness Gp-Part 1 Of 2
8u8014 Harness Gp-Part 5 Of 6
8u8014 Harness Gp-Part 2 Of 6
8u5298 Harness Gp
8u5841 Harness Gp
8u8084 Harness Gp-Part 1 Of 4
8u8014 Harness Gp-Part 6 Of 6
8u8014 Harness Gp-Part 3 Of 6
8u8014 Harness Gp-Part 4 Of 6
8u5868 Harness Gp
8u7343 Harness Gp
8u8084 Harness Gp-Part 2 Of 4
8u8054 Harness Gp-Part 2 Of 4
8u9220 Harness Gp-Part 1 Of 4
8u9221 Harness Gp-Part 2 Of 2
8u8086 Harness Gp-Part 2 Of 2
8u5839 Harness Gp
8u8014 Harness Gp-Part 1 Of 6
8u6694 Harness Gp-Steering
5w5860 Horn Gp-Air
8u6435 Horn Gp-Warning (Adtl)
5w8893 Lever Gp-Directional Signal & Horn
5W***93Lever Group-Directional Signal & Horn1
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8u6438 Lighting Gp-Eng Compart
8u6322 Lighting Gp-Boom (H.A.B.)
8u6316 Lighting Gp-Boom (Lh)
8u6432 Lighting Gp-Boom (1 Pc)
8u6433 Lighting Gp-Rear
8u6337 Panel Gp-Electric-Part 2b Of 2
8u6337 Panel Gp-Electric-Part 2a Of 2
8u6337 Panel Gp-Electric-Part 2 Of 2
8u6337 Panel Gp-Electric-Part 1a Of 2
8u6337 Panel Gp-Electric-Part 1 Of 2
8u6336 Panel Gp-Instrument
8u6095 Switch Gp
8u5842 Switch Gp-Rotor
8u5836 Switch Gp-Rotor
8u6590 Washer Gp-Windshield
8u5345 Wiring Gp-Batt&-Part 2 Of 4
8u5345 Wiring Gp-Batt&-Part 1 Of 4
8u5345 Wiring Gp-Batt&-Part 4 Of 4
8u5345 Wiring Gp-Batt&-Part 3 Of 4
8u4441 Wiring Gp-Gage & (Cab)
Engine Arrangement
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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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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Engine Installation
8u6731 Aid Gp-Ether Starting
8u4632 Coupling Gp
8u9307 Coupling Gp
8u4242 Frame Ar-Engine (Mounting)-Part 3 Of 4
8u4242 Frame Ar-Engine (Mounting)-Part 4 Of 4
8u4242 Frame Ar-Engine (Mounting)-Part 2b Of 4
8u4242 Frame Ar-Engine (Mounting)-Part 2 Of 4
8u4242 Frame Ar-Engine (Mounting)-Part 1 Of 4
8u4242 Frame Ar-Engine (Mounting)-Part 2a Of 4
8u4629 Pump Gp-Hyd-Part 2 Of 2
8u4629 Pump Gp-Hyd-Part 1 Of 2
8u5546 Regulator Gp / 8u4229 Housing Gp
8U***46Regulator Group / Housing Group1
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8u8108 Valve Gp
Fuel System & Governors
8u5046 Cable Gp-Governor
8u6289 Cable Gp-Governor
8u7579 Cable Gp-Governor Control
8u4374 Control Gp-Governor
5w8633 Pump Gp-Fuel Filler
5W***33Pump Group-Fuel Filler; -Refueling1
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8u6274 Pump Gp-Refueling
8u6274 Pump Gp-Refueling-Part 2 Of 2
8u6274 Pump Gp-Refueling-Part 1 Of 2
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
4p4775 Drive Gp-Governor & Transfer Pump-Flexible Drive
4P***75Drive Group-Gov & Transfer Pump1
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7w8179 Drive Gp-Governor & Transfer Pump
7W***79Drive Group-Gov & Transfer Pump1
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6i0232 Drive Gp-Governor & Transfer Pump
6I***32Drive Group-Gov & Transfer Pump1
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4p5614 Drive Gp-Governor & Transfer Pump
4P***14Drive Group-Gov & Transfer Pump1
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4p0666 Drive Gp-Governor & Transfer Pump
4P***66Drive 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
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
4p8154 Governor Gp-Unit Injector
4p4776 Governor Gp-Unit Injector
7e3697 Governor Gp-Unit Injector
4p5502 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
8u6171 Boom Ar-Hoe (Lines &) (H.A.B.)-Part 3b Of 4
8u6171 Boom Ar-Hoe (Lines &) (H.A.B.)-Part 1 Of 4
8u6171 Boom Ar-Hoe (Lines &) (H.A.B.)-Part 2a Of 4
8u6171 Boom Ar-Hoe (Lines &) (H.A.B.)-Part 2b Of 4
8u6171 Boom Ar-Hoe (Lines &) (H.A.B.)-Part 1a Of 4
8u6171 Boom Ar-Hoe (Lines &) (H.A.B.)-Part 3a Of 4
8u6171 Boom Ar-Hoe (Lines &) (H.A.B.)-Part 4 Of 4
8u6171 Boom Ar-Hoe (Lines &) (H.A.B.)-Part 2 Of 4
8u6171 Boom Ar-Hoe (Lines &) (H.A.B.)-Part 3 Of 4
8u7423 Control Gp-Adjuster (Lever)
8u6288 Control Gp-Engine Speed
8u7911 Control Gp-Hand
8u4439 Control Gp-Implement-Part 2 Of 3
8u4439 Control Gp-Implement-Part 3 Of 3
8u4439 Control Gp-Implement-Part 1a Of 3
8u4439 Control Gp-Implement-Part 1 Of 3
8u4439 Control Gp-Implement-Part 3a Of 3
8u4439 Control Gp-Implement-Part 2a Of 3
8u4439 Control Gp-Implement-Part 1b Of 3
8u6516 Control Gp-Lines &
8u6157 Control Gp-Solenoid
8u9132 Control Gp-Speed (Creeper)(Elect)
8u6141 Control Gp-Speed (Creeper)(Elect)
Control Gp-Speed (Creeper)(Mech)
8u7958 Cover Gp
8u4375 Cyl Gp-Lines & (Boom) (W/ Check Valve)-Part 2 Of 2
8u4375 Cyl Gp-Lines & (Boom) (W/ Check Valve)-Part 1 Of 2
8u4379 Cyl Gp-Lines & (Boom)(W/O Check Valve)
8u6388 Cyl Gp-Valve &
8u9171 Cylinder Gp
8u9175 Cylinder Gp
8u4898 Cylinder Gp
8u9174 Cylinder Gp
8u5389 Cylinder Gp
8u9176 Cylinder Gp
8u4850 Cylinder Gp
8u9170 Cylinder Gp
8u6306 Cylinder Gp
8u5375 Cylinder Gp-Boom (Lh)
8u5390 Cylinder Gp-Boom (Lh)
8u5391 Cylinder Gp-Boom (Rh)
8u5376 Cylinder Gp-Boom (Rh)
8u4350 Cylinder Gp-Foreboom
8u6174 Cylinder Gp-Foreboom
8u4897 Cylinder Gp-Stick
8u0189 Filter Gp
8u0198 Filter Gp
8u5037 Filter Gp
8u6418 Housing Gp-Solenoid
8u7201 Indicator Gp-Lift(Boom Load)(W/O Check Valve)
8u7206 Indicator Gp-Lift(Boom Load)(W/Check Valve)
8U***06Indicator Group-Lift (Boom Load)(W/Check Valve)1
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8u8046 Indicator Gp-Overload (W/O Check Valve)
8u8095 Indicator Gp-Overload (W/Check Valve)
8u6387 Lines Gp-1 Pc Boom
8u6390 Lines Gp-1 Pc Boom And Hydraulic Hammer
8U***90Lines Group-1 Pc Boom + Hydraulic Hammer1
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8u7096 Lines Gp-Anti-Drift (Boom Cyl)
8U***96Lines Group-Anti-Drift (Boom Cyl)1
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8u7093 Lines Gp-Anti-Drift (Stk Cyl)
8U***93Lines Group-Anti-Drift (Stk Cyl)1
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5w4559 Lines Gp-Clamshell
8u7957 Lines Gp-Dozer/Stab
8u6207 Lines Gp-Hammer (1 Pc Boom)
8u6212 Lines Gp-Hammer (1600)
8u6216 Lines Gp-Hammer (2100)
8u6218 Lines Gp-Hammer (2600)
8u6479 Lines Gp-Hammer (Hyd Adjust Boom)
8u6932 Lines Gp-Hyd (Addl Func W/O Bkt Cyl
8u6932 Lines Gp-Hyd (Adtl Function W/O Bkt Cyl)
8u7652 Lines Gp-Hyd (2100) Zmw
8u4437 Lines Gp-Hyd-Part 3a Of 3
8u4904 Lines Gp-Hyd (2600)
8u7646 Lines Gp-Hyd (Zmw)
8u6469 Lines Gp-Hyd (Adtl Function) (H.A.B.)
8u4437 Lines Gp-Hyd-Part 3 Of 3
8u4882 Lines Gp-Hyd (1 Pc Boom)
8u4906 Lines Gp-Hyd (3100)
8u4437 Lines Gp-Hyd-Part 1 Of 3
8u4437 Lines Gp-Hyd-Part 2 Of 3
8u5085 Lines Gp-Hyd (1600)
8u4901 Lines Gp-Hyd (2100)
8u4908 Lines Gp-Hyd
8U***08Lines Group-Hydraulic (Special Function)1
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8u4438 Lines Gp-Pilot-Part 1 Of 2
8u4438 Lines Gp-Pilot-Part 2 Of 2
8u4438 Lines Gp-Pilot-Part 1a Of 2
8u4436 Lines Gp-Pump-Part 1 Of 2
8u4436 Lines Gp-Pump-Part 2 Of 2
Lines Gp-Stabilizer
8u4890 Lines Gp-Stick (2100)
8u6397 Lines Gp-Stick (H.A.B)
8u4896 Lines Gp-Stick (3100)
8u4960 Lines Gp-Stick (2600)
8u4957 Lines Gp-Stick (1600)
8u5825 Lines Gp-U/C (Rear)
8u5824 Lines Gp-U/C (Front)
8u4452 Lines Gp-Undercarriage-Part 1 Of 4
8u4452 Lines Gp-Undercarriage-Part 4 Of 4
8u4452 Lines Gp-Undercarriage-Part 2 Of 4
8u4452 Frame Ar-Undercarriage-Part 3 Of 4
8u6509 Lines Gp-Valve &
8u6496 Lines Gp-Valve &
8u7522 Linkage Gp-Pedal Stop (H.A.B.)
8u6497 Manifold Gp
8u6515 Manifold Gp
8u6501 Pedal Gp (H.A.B.)
An Attachment
8u7102 Plug Gp
8u6573 Plug Gp-Hydraulic Hammer
8u7988 Pump Gp
8u1881 Pump Gp-Brake
8u6840 Pump Gp-Steering
Stabilizer Elect. (Crowler Gear)
Stabilizer Elect. (Rear)
8u6687 Steering Gp-Supplemental-Part 2 Of 2
8u6687 Steering Gp-Supplemental-Part 1 Of 2
8u2592 Switch Gp-Overload
8u4627 Tank Gp-Hyd
8u5910 Valve & Lines Gp-Stabilizer (2 Pt)
8u1068 Valve Gp
8u4663 Valve Gp
5w9422 Valve Gp
8u5873 Valve Gp-Control
8u6552 Valve Gp
8u6549 Valve Gp
8u6158 Valve Gp
8u1328 Valve Gp
Part Of 8u5390 Cylinder Gp-Boom (Lh)
8u2284 Valve Gp (Pressure Cut Off)
8u6550 Valve Gp
8u6556 Valve Gp
8u5382 Valve Gp
8u4798 Valve Gp
8u1650 Valve Gp (Creeper Speed)
8u6547 Valve Gp
8u6555 Valve Gp
8u6499 Valve Gp (Add'L Func)
8u6192 Valve Gp-Check
8u7094 Valve Gp-Check
8u5872 Valve Gp-Control
8u5912 Valve Gp-Control
8u8116 Valve Gp-Control
8u1944 Valve Gp-Diverter
8u6282 Valve Gp-Solenoid
8u6441 Valve Gp-Solenoid
8u6459 Valve Gp-Solenoid
Intake & Exhaust System
8u5650 Filter Gp-Air
8u5250 Muffler Gp
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
7w8599 Pump Gp-Engine Oil
4w4951 Pump Gp-Engine Oil
Starting And Electrical System
7c1683 Alternator Gp-Charging
7C***83Alternator Group-Charging; Charging Alternator Group (24v, 55a)1
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9w3043 Alternator Gp-Charging*R
9W***43Alternator Group-Charging; (24-Volt, 52-Ampere)1
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9x5524 Solenoid As-Latching
7c4028 Solenoid Gp-Shut-Off-24 Volt Dc, Boss Mounted
3e5381 Starting Motor Gp-Electric-24 Volt
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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206B serial number reference

Locate the ID plate on the machine outer frame. The serial prefix consists of the first three alphanumeric characters of the Product Identification Number (PIN).

PrefixIdentifies
2FG206B FT Mobile Excavator

Frequently asked questions

What engine is used in the Caterpillar 206B?

The Caterpillar 206B is equipped with a Caterpillar 3114 DIT turbocharged engine, rated at approximately 78 kW (104 hp).

What is the operating weight of this machine?

The machine has an operating weight of approximately 13.4 t (13.4 t). Note that weights may vary by configuration and serial range.

What model replaced the Caterpillar 206B?

The source text identifies the 206B as a replacement for the original Caterpillar 206; specific successor models for the 206B series are not documented in the provided text.

What 206B owners discuss

What engine is used in the Caterpillar 206B, and what are its power specifications?
The Caterpillar 206B is equipped with a Cat 3114 DIT turbocharged engine. This engine provides 78 kW (105 hp) of gross power.
What are the known hydraulic and drive performance issues following a pump rebuild on this model?
Operators have reported instances where a rebuilt hydraulic pump functions correctly for cylinder movement (preventing engine stall during deadheading) but results in a significant loss of drive strength, particularly when attempting to move on inclines.
What are the common electrical failure modes for Caterpillar excavators?
Electrical instability is a frequent issue. Common causes include moisture intrusion into connectors, damaged wiring harnesses, and failing charging systems. Voltage loss or grounding problems can cause the ECM to behave erratically, which may be mistaken for control unit failure.
What hydraulic system symptoms should be monitored to prevent pump destruction?
Loss of pressure, overheated oil, and jerky movement are primary indicators of contamination or internal leakage. Operating with low hydraulic oil levels can cause cavitation, which destroys pumps. Use HYDO Advanced or compatible fluids; avoid topping off with generic oils that may create sludge via cross-contamination.
What should be checked regarding the engine's air and fuel systems to prevent power loss?
Power loss, smoke, or overheating is often linked to airflow or contamination. Check for dirty air filters that can choke the turbocharger and inspect fuel filters for restrictions. Low-quality fuel can destroy injectors, leading to rough operation or excessive emissions.
What are the critical points to check when buying a used Caterpillar 206B?
Inspect hydraulic pump performance for drive strength on inclines and verify the condition of electrical connectors for moisture. Check the engine for exhaust smoke (black, white, or blue), which may indicate turbo issues, coolant leaks, or worn rings. Verify that the machine has not been operated with low oil levels to avoid dry bearings.

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

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