Caterpillarearthmoving compactorlandfill compactor

Caterpillar 826G

Maintenance schedule, common problems & OEM parts breakdown

The Caterpillar 826G is a heavy-duty landfill compactor designed for high-productivity waste compaction. This machine belongs to the earthmoving class of compactors and features a Cat 3406C TA engine (with Series II configurations utilizing the 3406E ATAAC diesel) producing approximately 340 hp (254 kW). The unit operates at an approximate weight of 76,805 lb (34,839 kg) and is configured with a straight blade, oscillating rear axle, and heavy-duty planetary power shift transmission. It is engineered for durability in landfill environments through specialized trash protection and robust axle components.

Across its production lifespan, the 826G evolved to improve operator efficiency through Command Control steering and integrated transmission controls, reducing physical motion effort. The transition between standard and Series II configurations introduced variations in engine models like the 3406E. In today's used market, the 826G remains a critical asset due to its proven durability and the availability of essential components. Its specialized features, such as the Anti-Wrap Axle Guard System and trash-resistant radiator designs, make it highly sought after for waste management fleets looking for reliable, low-cost compaction solutions.

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 826G specifications

Engine

Model	Cat 3406E ATAAC Diesel (Series II); Cat 3406C TA (Standard)
Gross Power	283 kW (380 hp)
Net Power	340 hp (254 kW)
Displacement	891 in³ (14.6 l) to 893 in³
Cylinders	6

Weights

Operating Weight

34,839 kg (76,805 lb) to 81,498 lb

Dimensions

Length - With Blade On Ground	8.4125 m (27.6 ft) to 27.13 ft
Width - Over Wheels	3.81 m (12.5 ft) to 12.47 ft
Width - Over End Bits - Blade	4.5111 m (14.8 ft)
Height - Top Of Cab With A/C	13.75 ft
Wheelbase	3,700.8 mm (12.1 ft) to 145.67 in
Ground Clearance - Counterweight	3.38 in
Height - Top Of Hood	8.86 ft
Height - Top Of Exhaust Pipe	12.57 ft
Height - Bottom Of Ladder	2.33 ft

Performance

Travel Speed Forward	11.2 km/h (6.9 mph) to 6 mph
Travel Speed Reverse	13.5 km/h (8.4 mph)
Transmission - Forward Gear 1	6.3 km/h (3.9 mph) to 3.6 mph
Transmission - Forward Gear 2	11.3 km/h (7 mph)
Transmission - Reverse Gear 1	7.6 km/h (4.7 mph) to 4.1 mph
Transmission - Reverse Gear 2	13.5 km/h (8.4 mph) to 6.6 mph
Blade Lift Speed At Rated RPM	0.4 m/s (1.4 ft/s) to 1.42 ft/s
Turning Radius - Inside	10.58 ft
Turning Radius - Outside	24.06 ft

Service capacities (summary)

Fuel Tank	630 l (166.5 gal)
Hydraulic Tank	88.2 l (23.3 gal) to 23.2 gal
Cooling System	81 l (21.4 gal) to 21.9 gal
Crankcase	34.1 l (9 gal)
Transmission	62.1 l (16.4 gal)
Differential - Final Drives - Front	90.1 l (23.8 gal)
Differential - Final Drives - Rear	90.1 l (23.8 gal)

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

826G fluids & capacities

System	Capacity	Recommended fluid
Engine Crankcase	34.1 L (9 US gal)	Cat DEO-ULS (for Tier 4 engines with aftertreatment) or Cat DEO (for engines without aftertreatment). Viscosity: SAE 10W-30 preferred for ambient temperatures between -18°C (0°F) and 40°C (104°F); use higher viscosity for hotter climates up to 50°C (122°F).
Cooling System	81 L (21.4 US gal) to 81 L (21.9 US gal)	Cat ELC (Engine Coolant)
Fuel Tank	630 L (166.5 US gal)	Diesel fuel
Transmission/Powertrain	62.1 L (16.4 US gal)	Cat TDTO (for powershift transmissions)
Final Drives (Front)	90.1 L (23.8 US gal)	Cat TDTO
Final Drives (Rear)	90.1 L (23.8 US gal)	Cat TDTO
Hydraulic System and Tank	88.2 L (23.3 US gal) to 88.6 L (23.4 US gal)	Cat HYDO Advanced 10 (for cold to moderate temperatures) or Cat HYDO Advanced 30 (for moderate to hot temperatures).
Grease		Not specified

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

Caterpillar 826G maintenance schedule

Service interval	Tasks
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 Monitor air filter restriction indicator Inspect for external fluid leaks
Every 250 h	Change engine oil and filter Grease all machine pivot points Perform visual inspection of components Check air filter primary element Verify belt and hose condition
Every 500 h	Replace fuel filters Replace hydraulic return filter Perform battery service and terminal inspection Conduct detailed undercarriage/tire inspection Test coolant additive levels
Every 1,000 h	Perform hydraulic oil sample analysis (S.O.S) Service final drive oil Inspect turbocharger for wear Check torque on ROPS bolts Measure component wear levels
Every 2,000 h	Change hydraulic system oil Perform cooling system flush Service transmission oil and filters Conduct comprehensive structural inspection Execute major component evaluation

Servicing the 826G beyond the schedule

Predictive Maintenance & Fluid Analysis

Utilize Cat S.O.S Services to monitor engine oil, hydraulic fluid, and transmission oil for wear metals like iron or copper. Analyze coolant for pH levels and SCA concentration to prevent internal corrosion. Regularly check the air filter restriction indicator to prevent dirt ingestion. Early detection of silicon or sodium in samples can prevent catastrophic engine or hydraulic pump failure.

Corrective & Common Repairs

Address front differential issues promptly to prevent widespread drivetrain damage. Monitor hydraulic hoses for cracks, abrasion, or leaks that lead to pump cavitation. Inspect the radiator and cooling system frequently; debris buildup requires cleaning to avoid overheating. If the engine experiences oil pressure drops, investigate potential bearing wear or oil starvation immediately to avoid total engine loss.

Overhaul & Rebuild Points

Plan for major component evaluation during 2,000-hour intervals. Focus on inspecting the turbocharger and evaluating the condition of the planetary transmission components. When rebuilding, assess structural integrity, specifically checking torque on ROPS bolts and blade mounting hardware. Comprehensive inspections of the hydraulic pumps and large capacity lift cylinders are essential during high-hour rebuild cycles.

Seasonal & Environment Servicing

In dusty or quarry environments, check air filters daily and clean radiator fins more frequently to prevent overheating. For landfill applications, inspect the Anti-Wrap Axle Guard System for debris buildup that could damage seals. In cold climates, ensure traction tips are secure for maximum grip in frozen waste. Always verify hydraulic oil viscosity and condition if operating in extreme temperature fluctuations.

826G 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	Engine shutdown required; perform full cooling system diagnosis
110-0	Engine Coolant Temp — Above Normal	Low coolant level or thermostat failure	Inspect cooling system, refill coolant, and test thermostat
110-3	Engine Coolant Temp 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 and tone ring
2458-2	DPF #1 Differential Pressure — Erratic	Plugged pressure ports or failing sensor	Clean pressure ports and test sensor; verify DPF soot load
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
2348-9	SAE J1939 Data Link #2 — Abnormal Update Rate	CAN bus wiring damage or termination fault	Check CAN wiring and measure termination resistance

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

826G attachments & work tools

Blades

Straight blade configuration is standard for waste management. Features include a moldboard length of 14.1 ft (4.3 m) to 14.8 ft (4.51 m) and a height of 6.25 ft (1.9 m) to 6.3 ft (1.92 m).

Wheels and Traction

Available configurations include self-cleaning chopper wheels, plus tip teeth with abrasion resistant material, and traction tip wheels. Drum width is approximately 3.9 ft (1.2 m) to 4 ft (1.22 m) with diameters ranging from 5.1 ft (1.55 m) to 6.1 ft (1.86 m).

Mounting and Protection Systems

Optional Cat Anti-Wrap Axle Guard System protects final drives, planetaries, and seals from debris. Includes a cab bottom guard to protect hydraulic hoses and wires.

Hydraulic and Control Configurations

Systems utilize armrest-mounted levers for low-effort implement control. Features include load sensing steering and integrated transmission controls via Command Control steering.

All 826G assemblies by section

Every catalogued assembly group for the Caterpillar 826G. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Frame And Body

2z-9960 Kit-Cleaner Bar -Custom

13***22	Gusset	6
13***41	Gusset	8
13***06	Gusset	4
13***15	Block	2

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2z-9967 Kit-Cleaner Bar -Custom

13***22	Gusset	8
13***41	Gusset	12
13***06	Gusset	4
13***15	Block	2

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826G serial number reference

The PIN plate is typically riveted to the machine's outer frame. To read the prefix, identify the first three alphanumeric characters of the Product Identification Number (PIN). For post-2001 models, the serial number is the last 8 characters of the 17-character PIN.

Prefix	Identifies	Notes
7LN	826G	Identified in machine listings for the 826G Landfill Compactor. Engine configuration is Cat 3406E ATAAC Diesel. Confirm exact build year and region with dealer.

Frequently asked questions

What engine is used in the Caterpillar 826G?

The standard 826G is equipped with a Cat 3406C TA engine, while Series II configurations may utilize the Cat 3046E ATAAC diesel engine.

What is the operating weight of the machine?

The Caterpillar 826G has an approximate operating weight of 34,839 kg (76,805 lb).

What model replaced the 826G?

The 826K landfill compactor succeeded the 826G, featuring a larger operating weight of 90,207 lb and a Cat C15 engine.

What 826G owners discuss

What are the primary engine models used in the Caterpillar 826G series?

The 826G configuration utilizes the Cat 3406C TA engine. The 826G Series II variant is equipped with the Cat 3406E ATAAC Diesel engine. Gross power for these units is rated at 340 hp (254 kW). Engine displacement varies by series, documented at approximately 891 in³ (14.6 l) for the 3406C and 893 in³ for the 3406E.

What hydraulic system behaviors or features are standard on the 826G?

The machine uses a load-sensing steering system to maximize performance by directing power only when required. The hydraulic system provides low-effort implement control via armrest-mounted levers that send electrical signals to a pilot valve. Standard components include XT-3 and XT-5 hoses and O-ring face seals. Relief valve settings are rated at 3500 psi.

What common electrical or sensor issues should be monitored in Caterpillar machines?

Electrical instability is a frequent issue, often caused by moisture intrusion into connectors, stressed wiring harnesses, or failing charging systems. Operators may observe erratic ECM behavior due to simple grounding problems or voltage loss under load. Additionally, the 826G monitoring system provides a 3-level warning for key functions to assist in identifying these faults.

What are the typical maintenance requirements for the 826G hydraulic and transmission fluids?

To prevent pump cavitation and valve sludge, use Caterpillar HYDO Advanced oils for hydraulic systems. For transmission, ensure proper fluid levels to avoid issues; the transmission tank capacity is 62.1 l (16.4 gal). Avoid cross-contamination when topping off, as exceeding a 10% mix of different oil types can damage components.

What specific wear patterns or protection features are relevant to the 826G's wheels and axles?

For landfill applications, the machine may be equipped with self-cleaning chopper wheels or weld-on traction tips for difficult terrain. To protect against debris, an optional Cat Anti-Wrap Axle Guard System is available to shield final drives, planetaries, and seals from wire, cable, or plastic entanglement.

What should be checked when buying a used Caterpillar 826G?

Perform a thorough inspection of the hydraulic cylinders for leaks and check the condition of the engine cooling system. Verify the exact serial-prefix specification sheet to confirm the installed attachment package, as configurations like blade width or drum diameter can vary. Inspect the underside of the cab and chassis for damage from flying debris. Have your dealer verify the machine build date using the official SIS database.

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

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