Caterpillar 365B II
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar 365B II is a large-class hydraulic excavator designed for heavy production tasks such as quarrying, trenching, and truck loading. This series features the Cat 3196 ATAAC engine, delivering approximately 404 hp (301.3 kW). The machine operates in the roughly 60-tonne class, with configurations including standard and long undercarriages. It is engineered for high performance, offering a maximum digging depth of approximately 9.5 m (31.2 ft) and a maximum reach at ground level of approximately 14 m (46 ft).
The Series II generation introduced significant upgrades over the predecessor 365B L, providing 5 percent more engine horsepower and up to 19 percent increased lift capacity. Improvements were made to the engine, boom/stick cylinders, and bucket linkage. In today's used market, this machine remains a critical asset due to its robust 3196 ATAAC powertrain and advanced electronic control systems like VIDS. Its durability in heavy-duty applications makes it a high-value choice for fleet owners seeking reliable earthmoving capacity.
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 365B II specifications
Engine
| Model | Caterpillar 3196 ATAAC |
| Net Power | 404 hp (301.3 kW) |
| Displacement | 730 cu in (12 L) |
| Bore | 5.2 in (130.1 mm) or 5.12 in (130 mm) |
| Stroke | 6 in (150.2 mm) or 5.91 in (150 mm) |
| Emissions Tier | EPA Tier 2 |
Weights
| Operating Weight (Standard Undercarriage) | 150,333 lb (68,190 kg) or 149,000 lb (67,630 kg) |
| Operating Weight (Long Undercarriage) | 150,200 lb (68,129.6 kg) or 150,200 lb (68,190 kg) |
Dimensions
| Transport Length | 13.3 m |
| Transport Width | 3.4 m or 3.5 m |
| Transport Height | 4.16 m to 4.37 m |
| Track Shoe Width | 650 mm |
Performance
| Maximum Digging Depth | 9.5 m to 9.6 m (31.17 ft to 31.2 ft) |
| Maximum Reach at Ground Level | 14 m (45.93 ft to 46.1 ft) |
| Swing Speed | 6.5 rpm |
| Maximum Travel Speed | 2.6 mph (4.1 km/h) |
| Maximum Drawbar Pull (Standard Undercarriage) | 103,767 lb (461.58 kN) to 103,767.29 lb (461.58 kN) |
| Maximum Drawbar Pull (Long Undercarriage) | 103,820 lb (47092.75 kg) to 103,820 lb (462 kN) |
Forces
| Bucket Digging Force | 86,100 lb (383 kN) |
| Stick/Arm Digging Force | 65,200 lb (290 kN) |
| Swing Torque | 150,850 lb-ft (204.5 kN·m to 204,525.2 Nm) |
Service capacities (summary)
| Fuel Tank Capacity | 798.8 L to 800 L (211 gal) |
| Hydraulic System (Including Tank) | 670 L to 670.1 L (177 gal) |
| Hydraulic Tank | 310 L to 310.5 L (82 gal) |
| Engine Oil | 54 L to 54.2 L (14.3 gal) |
| Cooling System | 94.7 L to 95 L (25 gal) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
365B II fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | 14.3 US gal (54 L) | Not specified by name in provided documentation |
| Cooling system | 25 US gal (95 L) | Not specified by name in provided documentation |
| Fuel tank | 211 US gal (800 L) | Not specified by name in provided documentation |
| Hydraulic system total | 177 US gal (670 L) | Not specified by name in provided documentation |
| Hydraulic tank | 82 US gal (310 L) | Not specified by name in provided documentation |
| Final drive (each) | 15 L (4 US gal) | Not specified by name in provided documentation |
| Swing drive (each) | 12 L (3.2 US gal) | Not specified by name in provided documentation |
| Grease | Not specified | Not specified by name in provided documentation |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar 365B II maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the 365B II beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize Caterpillar S.O.S Services to monitor engine oil, hydraulic fluid, and coolant. Analyze wear metals like iron or copper and contaminants such as silicon to detect early pump or cylinder wear. Regular hydraulic oil sampling at 1,000-hour intervals is critical for preventing catastrophic failures in the high-pressure 5080 psi (35000 kPa) system. For machines with optional fine filtration, hydraulic oil changes can be extended to 5000 hours based on verified fluid condition.
Corrective & Common Repairs
Monitor the pilot hydraulic system filter and swing/travel motor case drain filters to prevent contamination. If hydraulic performance drops, inspect for leaks in XT5 or XT6 high-pressure hoses. Check the radial seal main air cleaner for clogging; the VIDS system will alert the operator if the element is restricted. Ensure the water separator is drained regularly to prevent fuel system issues caused by moisture ingress in the battery compartment.
Overhaul & Rebuild Points
During major service intervals, perform a comprehensive structural inspection of boom and stick welds. Evaluate the condition of the 3196 ATAAC engine components, specifically inspecting the turbocharger and two-piece articulated pistons. For undercarriage rebuild points, measure track link and roller wear to determine if replacement is necessary. At the 2,000-hour mark, a full coolant flush is required to prevent internal engine corrosion and liner pitting.
Seasonal & Environment Servicing
In high-dust or quarry environments, check air filters daily and clean radiator/oil cooler fins frequently. Shorten engine oil intervals to 200 hours if operating in extreme sand conditions. For machines operating in cold climates, ensure the hydrostatically driven fan and automatic climate control systems are functional. Always verify the integrity of the Donaclone precleaner and radial seal air cleaner to maintain engine breathing efficiency in harsh seasonal conditions.
365B II fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| E360 | Engine Coolant Temperature — High | Low coolant level, failed thermostat, or water pump issue | Diagnose cooling system; do not operate until resolved |
| E361 | Engine Coolant Temperature — Very High (Shutdown) | Severe cooling system failure | Perform full cooling system diagnosis; engine shutdown required |
| 110-0 | Engine Coolant Temperature — Above Normal | Low coolant level or thermostat failure | Inspect cooling system, refill coolant, and test thermostat |
| 110-3 | Engine Coolant Temperature Sensor — Voltage High | Open circuit or sensor failure | Check wiring and replace sensor if confirmed faulty |
| 174-3 | Engine Fuel Temperature — Voltage Above Normal | Open circuit in sensor wiring | Inspect harness and replace sensor if necessary |
| 190-8 | Engine Speed — Abnormal Frequency | Speed sensor air gap, sensor failure, or tone ring damage | Check sensor gap and test speed sensor/tone ring |
| 41-3 | 8-Volt DC Supply — Voltage Above Normal | Short to power on 8V reference circuit | Inspect sensors sharing the 8V supply and isolate fault |
| 41-4 | 8-Volt DC Supply — Voltage Below Normal | Short to ground on 8V reference circuit | Disconnect sensors one at a time to locate short |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
365B II attachments & work tools
Buckets
Capacity ranges from 2.12 to 6 yd³ (1.6 to 4.6 m³). Available configurations include General Purpose (GP), Excavation (E), Heavy Duty (HD), Extreme Excavation (EX), Heavy Duty Rock (HDR), and Rock (R) types. All mass excavation sticks accept WB-family buckets and bucket linkage, while reach booms accept V-family buckets.
Hydraulic hammers
The machine is equipped with an auxiliary valve standard for operating tools such as hammers. Specific hammer weight class is not documented for this exact serial range — verify with your dealer.
Quick couplers
Compatible with quick coupler systems. Use of specific models like CW40 is noted in related heavy equipment listings for this class.
Thumbs/grapples
The machine can be configured with various work tools including grapples, rotators, and crushers. Specific thumb kit dimensions are not documented for this exact serial range — verify with your dealer.
Rippers
The machine is capable of utilizing rippers as part of its work tool variety. Consult a dealer for specific configuration availability.
Hydraulic-kit notes
Standard auxiliary valve supports tools like hammers and shears. The system includes high-pressure and medium-pressure hydraulic lines/functions.
All 365B II assemblies by section
Every catalogued assembly group for the Caterpillar 365B II. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Frame And Body
1852725 (V00) Lines Gp-Grease (Stick)
| 18***25 | Lines Group; -Stick | 1 |
Hydraulic System
1880407 (V00) Cylinder Ar
| 15***74 | Cylinder & Lines Group-Boom; -Lh | 1 |
| 15***75 | Cylinder & Lines Group-Boom; -Rh | 1 |
| 18***07 | Cylinder Ar | 1 |
1902771 (V00) Lines Gp-Boom
| 19***71 | Lines Group | 1 |
1902772 (V00) Lines Gp-Auxiliary Hydraulic
| 19***72 | Lines Group; -Hydraulic | 1 |
1903380 (V00) Lines Gp-Boom
| 19***80 | Lines Group | 1 |
1902772 (V02) Lines Gp-Auxiliary Hydraulic
| 19***72 | Lines Group; -Hydraulic | 1 |
1902771 (V02) Lines Gp-Boom (Mp)
| 19***71 | Lines Group | 1 |
1922532 (V01) Lines Gp-Front
| 19***32 | Lines Group | 1 |
1809372 (V00) Valve Ar
| 15***89 | Valve Ar-Boom Lowering Control | 1 |
| 18***72 | Valve Ar | 1 |
| 19***79 | Valve Ar | 1 |
1903379 (V00) Valve Ar
| 15***19 | Lines Group-Pilot | 1 |
| 15***73 | Lines Group-Stick Cylinder | 1 |
| 16***97 | Valve Group-Main Control | 1 |
Implements
1845231 (V00) Stick Ar
| 13***57 | Lines Group-Stick | 1 |
| 18***31 | Stick Ar | 1 |
| 18***32 | Stick Group | 1 |
1845232 (V00) Stick Gp-Hoe
| 18***32 | Stick Group | 1 |
Operators Station
4q4379 (V04) Guard Gp-Overhead
| 4Q***79 | Guard Group-Overhead; -Custom | 1 |
Undercarriage
2012600 (V01) Track Gp
| 20***00 | Track Group | 1 |
| 20***02 | Track Group | 1 |
2012602 (V00) Track Gp
| 14***06 | Link As-Track | 1 |
| 14***05 | Bolt-Track | 188 |
| 14***06 | Nut-Track | 188 |
2094834 (V00) Track Gp
| 20***34 | Track Group | 1 |
| 20***35 | Track Group | 1 |
2078405 (V00) Track Gp
| 20***05 | Track Group | 1 |
| 20***07 | Track Group | 1 |
2094835 (V00) Track Gp
| 14***06 | Link As-Track | 1 |
| 14***05 | Bolt-Track | 188 |
| 14***06 | Nut-Track | 188 |
2078407 (V00) Track Gp
| 10***69 | Link As-Track; Track Link As-Track | 1 |
| 19***25 | Shoe | 26 |
| 19***26 | Shoe | 25 |
365B II serial number reference
The PIN plate is typically riveted to the machine frame, often on the right-hand side below the cab or near the boom base. The first three alphanumeric characters of the PIN represent the prefix, which identifies the model generation and manufacturing factory. For the 365B II, the engine is the Cat 3196.
| Prefix | Identifies | Notes |
|---|---|---|
| CFJ | 365B II (Series II) | Identifies Series II configuration. Engine: Cat 3196. Sequence ID starts from 00001-UP. |
| DER | 365B II (Series II) | Identifies Series II configuration. Engine: Cat 3196. Sequence ID starts from 00001-UP. |
| JMB | 365B II (Series II) | Identifies Series II configuration. Engine: Cat 3196. Sequence ID starts from 00001-UP. |
Frequently asked questions
What engine powers the Caterpillar 365B II?
The machine is equipped with a Caterpillar 3196 ATAAC diesel engine, providing 404 hp (301.3 kW) of net flywheel power.
What is the operating weight of this excavator?
Operating weight varies by configuration: the standard undercarriage weighs approximately 150,333 lb (68,190 kg), while the long undercarriage version weighs approximately 150,200 lb (68,129.6 kg).
What model replaced the 365B II?
The provided documentation identifies the 365B L Series II as a successor to the 365B L; specific details for a direct replacement of the Series II are not documented in the available source text.
What 365B II owners discuss
What are the primary engine-related causes for power loss or smoke in the 365B II?
What electrical issues commonly cause unpredictable fault codes or starting failures on this machine?
How does the hydraulic system behavior change when there is an internal issue?
What specific undercarriage components should be monitored for service life?
What is the standard maintenance interval for engine oil and filters on this series?
What should be checked when inspecting a used 365B II for potential hydraulic or mechanical failure?
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Need a specific 365B II part?
Search live OEM part data, check fitment, and cross-reference alternatives with Heavy Parts AI.