Question 1

What engine does the Caterpillar 329E L excavator use?

Accepted Answer

The 329E L runs a Cat C7.1 ACERT six-cylinder diesel, rated 161 kW (216 hp) net (179 kW / 240 hp gross per ISO 14396), 7.01 L displacement. It uses high-pressure common-rail injection and a DPF-plus-catalyst regeneration system to meet EU Stage IIIB / US EPA Tier 4 Interim emissions, with no DEF or SCR dosing required.

Question 2

What is the operating weight of the Caterpillar 329E L?

Accepted Answer

Operating weight for the 329E L long-undercarriage variant runs approximately 28,717-30,959 kg (63,300-68,250 lb), depending on boom and stick length, counterweight, and track shoe width fitted.

Question 3

What replaced the Caterpillar 329E L?

Accepted Answer

Caterpillar replaced the 329E L with the 329F L in its next-generation medium excavator lineup, carrying the long-undercarriage 29-30 tonne class forward with a Tier 4 Final C7.1 ACERT engine and updated hydraulics and cab electronics. The 329E L itself had succeeded the earlier 329D L.

Question 4

How does the C7.1 ACERT engine and its emissions system behave on the 329E L, and is it different from older Cat mid-range diesels?

Accepted Answer

The 329E L runs the C7.1 ACERT, a 7-liter inline six on a high-pressure common-rail fuel system with full electronic injection, not the older hydraulic unit-injector (HEUI) design used on earlier C7-family engines. Turbo setup is a single or two-stage wastegated unit depending on configuration. It meets Tier 4 Interim / Stage IIIB through a diesel particulate filter and catalyst, not SCR, so there is no DEF tank to manage. Regeneration runs automatically in the background during normal digging and needs no operator input. A manual parked regen is available from the monitor for machines that idle heavily or run light duty cycles and never build enough exhaust heat to self-clean the filter. Run ultra-low-sulfur diesel (or a B20 blend) and CJ-4 or better low-ash oil; anything less shortens filter life and forces more frequent parked regens.

Question 5

The machine throws random fault codes or cranks but won't come up into run - what's usually going on?

Accepted Answer

On this machine that pattern points to wiring or ECM communication, not a bad injector or sensor. A recurring code owners report is a CAN data-link fault between the engine ECM and the monitor, logged as a J1939 network error rather than an actual component failure - usually traced to corroded connector pins or a weak ECM ground, not a dead module. On higher-hour machines the engine harness chafes where it routes near the block and filter bracket, and the resulting intermittent short throws unrelated codes that come and go with vibration. Before replacing parts, clean and reseat every ECM connector, check main grounds for corrosion, and inspect the harness where it contacts the block.

Question 6

The main hydraulic pump is whining or growling under load - does that mean it's shot?

Accepted Answer

A whine or growl from the main pump under load is usually air in the system or cavitation, not a worn-out pump. Check hydraulic oil level and condition first, then check suction-side lines and fittings for a leak pulling air in rather than fluid out. Bleed the system after any hose or filter work. If the noise persists once fluid and air checks come back clean, pull a case-drain sample; metal or brass in the sample points to slipper or swashplate wear inside the pump and means a teardown rather than more troubleshooting.

Question 7

Boom or stick creeps down when parked overnight - is that normal wear?

Accepted Answer

Some downward creep on the boom or stick over several hours is normal on any excavator this size, and the 329E L's boom circuit includes a drift-reduction valve specifically to keep it in check. What's not normal is a boom that visibly drops within a minute or two, or drift that has clearly worsened over time - that points to internal bypass past the cylinder piston seal or a leaking holding valve, not something an adjustment fixes. A drift test, timing settlement under a known load against factory spec, is the right way to separate normal seepage from a cylinder that needs a reseal. Have your dealer verify any suspected holding-valve or cylinder fault before working under a raised boom or stick.

Question 8

A track keeps losing tension soon after it's adjusted - what's the usual cause?

Accepted Answer

Look past the grease fitting first. A track pressure relief valve or fitting that isn't sealing will bleed pressure back out about as fast as it goes in, and owners of this model have chased exactly that symptom to a leaking relief valve. Advanced chain wear or an idler near the end of its travel produces the same symptom, so measure tension under consistent conditions before condemning the valve. Day to day, this machine wears its undercarriage the way any medium excavator does: sharp pivots and counter-rotating on hard or abrasive ground accelerate bushing and sprocket wear, packed debris keeps components from running true, and tracks left too tight overload rollers and idlers. The relief valve is spring-loaded and stores real energy - have your dealer or a qualified tech service it rather than backing it out cold.

Question 9

Swing drive or a travel motor is grinding or running hot - what does that point to?

Accepted Answer

Grinding or growling from the swing drive or a travel motor, especially with rising case temperature, is the classic sign of internal bearing wear or breakdown lubricant on this class of machine and isn't something to run through hoping it clears up. A slow drip at the sprocket-to-travel-motor joint is almost always a failed face seal at that interface; it's a maintenance item rather than an emergency, but ignored long enough it lets contamination into the final drive. Separately, medium Cat excavators in this weight class have had swing-bearing mounting bolts lose torque or shear over time, showing up as a knock or slight house movement when swinging under load - a periodic bolt-torque check on the swing bearing is cheap insurance against a much bigger repair.

Question 10

What should you check when looking at a used 329E L before buying?

Accepted Answer

Walk the undercarriage first and get an actual measured wear percentage on the chain rather than a visual guess; listings for this model commonly show machines in the 80-90% range and undercarriage condition is the single biggest swing factor in resale value. Start the engine cold and watch for smoke, and confirm the DPF/regen system isn't throwing derate warnings or stuck in a parked-regen loop. Cycle every hydraulic function including boom and stick under load, watching for drift or hesitation, and check the swing for knock or looseness. Have the dealer pull the ECM fault code history rather than trusting a cleared display; stored and logged codes show what the previous owner actually dealt with. Confirm hour count is consistent with wear level and application history, check cab electronics and AC function, and ask for oil sample history if the seller has one.

Engine model	Cat C7.1 ACERT, 6-cylinder turbocharged diesel
Net flywheel power (rated)	161 kW (216 hp)
Gross power (ISO 14396)	179 kW (240 hp)
Displacement	7.01 L (428 cu in)
Cylinders	6
Emissions tier	EU Stage IIIB / US EPA Tier 4 Interim, with Cat Clean Emissions Module

Operating weight range (Long Undercarriage)	28,717-30,959 kg (63,313-68,254 lb), varies by boom/stick, counterweight and track shoe width
Ground pressure	45.5-59.7 kPa (6.6-8.7 psi), lowest with 800 mm shoes, highest with 600 mm shoes
Transport weight	Not separately published; ships at the operating-weight figure for the ordered boom/stick/shoe configuration

Transport length	9830-10,400 mm (32'3"-34'1"), varies by boom/stick
Transport width	3190 mm (10'6") w/600 mm shoes, 3290 mm (10'10") w/700 mm shoes, 3390 mm (11'2") w/800 mm shoes
Transport/shipping height	3372-3520 mm (11'1"-11'7"), includes shoe lug height, varies by stick
Tail swing radius	3044 mm (10'0")
Track shoe width	600 mm (24") standard triple grouser; 700 mm (28") and 800 mm (32") triple grouser optional
Ground clearance	490 mm (1'7")
Undercarriage length	Track length 4855 mm (15'11"); length to center of rollers 3994 mm (13'1")
Track gauge	2590 mm (8'6")
Cab height	3044 mm (10'0"), 3240 mm (10'8") with top guard

Max dig depth	6100-7250 mm (20'0"-23'9"), shortest with 5.55 m mass boom, deepest with 6.15 m HD reach boom and long stick
Max reach at ground level	9430-10,680 mm (30'11"-35'0")
Max dump/loading height	6000-6950 mm (19'8"-22'10")
Max cutting height	9130-10,010 mm (29'11"-32'10")
Swing speed	9.8 rpm, swing torque 82.2 kN·m (60,650 lbf-ft)
Max travel speed	5.1 km/h (3.2 mph)
Drawbar pull	247 kN (55,528 lbf)
Gradeability	Not documented in available factory spec sheets for this model

Bucket digging force (ISO)	179 kN (40,240 lbf) with 6.15 m HD reach boom and CB-family bucket (std or long stick); 210 kN (47,210 lbf) with 5.55 m mass boom and DB-family bucket
Stick digging force (ISO)	126 kN (28,326 lbf) on long reach stick, 145 kN (32,597 lbf) on standard reach stick (both HD reach boom), 152 kN (34,171 lbf) on mass boom stick

Caterpillar 329E L

Caterpillar 329E L specifications

Engine

Weights

Dimensions

Performance

Forces

Service capacities (summary)

329E L fluids & capacities

Caterpillar 329E L maintenance schedule

Servicing the 329E L beyond the schedule

Predictive Maintenance & Fluid Analysis

Corrective & Common Repairs

Overhaul & Rebuild Points

Seasonal & Environment Servicing

329E L fault codes & troubleshooting

329E L attachments & work tools

Buckets

Hydraulic hammers

Quick couplers

Thumbs/grapples

Rippers

Hydraulic-kit notes

All 329E L assemblies by section

329E L serial number reference

Frequently asked questions

What 329E L owners discuss

Need a specific 329E L part?

Fuel tank	520 L (137.4 gal)
Hydraulic system (incl. tank)	310 L (81.9 gal); hydraulic tank alone 155 L (40.9 gal)
Engine oil (with filter)	22.5 L (5.9 gal)
Cooling system	44 L (11.6 gal)
Swing drive / final drive (each side)	Swing drive 10 L (2.6 gal); final drive 6 L (1.6 gal)

System	Capacity	Recommended fluid
Engine crankcase (with filter)	22.5-22.7 L (6.0 US gal)	Cat DEO-ULS low-ash diesel engine oil (required on this ACERT/emissions-controlled engine; standard Cat DEO is not approved). SAE 10W-30 for ambient -18C to 40C; SAE 15W-40 for warmer climates down to about -9.5C; Cat DEO Cold Weather 0W-40 for sub-arctic starts.
Cooling system	44 L (11.7 US gal)	Cat ELC (Extended Life Coolant), factory premix or concentrate mixed 50/50 with water. Long-life, low-silicate glycol formulation for this engine.
Fuel tank	520 L (137.4 US gal)	Ultra-low sulfur No. 2 diesel meeting ASTM D975 or EN 590. Biodiesel blends up to B20 acceptable if the blend stock meets Cat fuel spec.
Hydraulic system (total, incl. tank)	310 L (81.9 US gal)	Cat HYDO Advanced, grade chosen by ambient temperature: HYDO Advanced 10 for cold climates to about -20C, HYDO Advanced 20 for moderate ranges, HYDO Advanced 30 for sustained heat above 40C. Cat BIO HYDO Advanced where a biodegradable fluid is required.
Hydraulic tank (reservoir)	155 L (40.9 US gal)	Same as hydraulic system: Cat HYDO Advanced 10/20/30 by ambient temperature, or Cat BIO HYDO Advanced.
Final drive (each)	approx. 6 L (1.6 US gal) each side - varies by configuration, verify with dealer	Cat TDTO (TO-4 Transmission/Drive Train Oil), monograde selected by ambient temperature, or Cat TDTO-TMS multigrade for wide temperature swings.
Swing drive	10 L (2.7 US gal)	Cat TDTO (TO-4), same grade selection as final drives.
Grease (spec only)	not applicable - lubricant spec only, no fixed refill volume	Cat Multipurpose (Prime Application) Grease, NLGI 2, for pin and bushing grease points. Cat Ultra5-Moly grease for extreme-pressure points where specified.

Service interval	Tasks
Every 50 h	Walk around the machine before starting; check for fluid leaks, loose bolts, and undercarriage or structural damage. Check engine oil level, coolant level, and hydraulic tank sight gauge. Drain water and sediment from the fuel water separator. Grease boom, stick, and bucket linkage pins (daily during break-in, weekly once seated). Check track sag and inspect shoes, rollers, and idlers for wear or damage. Test the backup alarm, work lights, and seat belt condition.
Every 250 h	Change engine oil and filter if not running on S·O·S-extended oil life. Replace primary and secondary fuel filter elements. Inspect and adjust alternator and fan belt tension. Clean or replace the cab fresh-air filter. Check swing drive and final drive oil levels.
Every 500 h	Change engine oil and filter. Replace the hydraulic oil return filter element. Pull engine oil, hydraulic oil, and coolant samples for S·O·S analysis. Replace fuel filter and water separator elements. Inspect the A/C compressor belt and clean condenser and radiator fins.
Every 1,000 h	Change final drive gear oil in both travel motors. Change swing drive gear oil. Replace the hydraulic tank case-drain breather element. Inspect turbocharger mounting and boost air lines for leaks. Check alternator, starter, and wiring harness condition.
Every 2,000 h	Change hydraulic system oil, or follow S·O·S trend if running an extended-life hydraulic fluid. Check and adjust engine valve lash clearance. Inspect swing bearing bolt torque and engine mount condition. Replace engine coolant if not on Cat Extended Life Coolant. Inspect high-pressure fuel lines and injectors for leakage or chafing.
Every 5,000 h	Clean or replace Clean Emissions Module DPF ash accumulation (minimum service interval for the C7.1 ACERT aftertreatment). Inspect the turbocharger for shaft play and housing cracks. Inspect swing gear and pinion wear, re-torque swing bearing bolts. Sample and inspect final drive and swing drive gear oil condition before deciding on a full change.
Every 6,000 h	Replace Cat Extended Life Coolant (ELC) at its first full-change interval. Change hydraulic system oil if running Cat HYDO Advanced extended-interval fluid. Inspect main hydraulic pump, travel motors, and swing motor for rebuild if oil analysis shows abnormal wear metals. Replace worn boom, stick, and bucket linkage bushings.

Code	Meaning	Likely cause	What to do
1044-2 (E1044)	Intake manifold (boost) pressure reads high with moderate severity; the engine controller flags turbo boost above the calibrated value expected for current load and speed.	Turbocharger wastegate valve or wastegate regulator stuck or sticking, worn actuator linkage, or the actuator not moving through full travel.	With the engine off, disconnect the wastegate actuator rod and work the wastegate lever through its full range by hand; if it binds, service or replace the turbocharger. Clear any related boost-sensor codes first before condemning the turbo.
247-14 (MID 36, Data Link)	The engine/machine ECM and the monitor display ECM are exchanging corrupted or invalid data over the J1939 data link; gauges can read blank or erratic and unrelated warning lights can trip.	Data-link wiring or connector fault, low system voltage, or engine/monitor ECM software not matched to the current data-link revision.	Check battery voltage and inspect data-link wiring and connectors for corrosion or damage first. If wiring checks out, confirm the engine and monitor ECM software is current, since a factory software update has resolved this exact fault on this machine.
E360	Engine oil pressure has dropped below the normal range for current engine speed; response escalates through warning, power derate, and shutdown levels depending on how low pressure falls.	Low oil level, a plugged oil filter, a worn oil pump, or a failed oil pressure sensor.	Stop and check oil level and filter condition right away. If level and filter are good, verify the sensor reading against a mechanical gauge before suspecting the pump.
E361	Engine coolant temperature is above the normal operating range; severity can range from a dash warning up to a commanded power derate or shutdown.	Low coolant, a plugged radiator core or fins, a failed fan or fan drive, a thermostat stuck closed, or a faulty coolant temperature sensor.	Check coolant level and clean debris from the radiator core and fins first, then confirm fan operation. Verify the sensor reading against actual coolant temperature before deeper teardown.
E362	Engine speed has exceeded the governed maximum; the controller logs an overspeed warning and can command a shutdown at extreme rpm.	Sudden loss of load such as a downhill run, or a speed/timing sensor sending a false high-rpm signal.	Review recent operating conditions for a load-loss event. If none occurred, check the engine speed/timing sensor wiring and signal quality before replacing parts.
E2143	The coolant level sensor reports coolant below the safe minimum in the surge tank or radiator; severity can escalate from warning to derate or shutdown.	Actual low coolant from an external or internal leak, or a faulty coolant level sensor or float.	Visually check coolant level and inspect for leaks before replacing the level sensor.
110-3 / 110-4	Coolant temperature sensor circuit reads outside the normal voltage range: FMI 3 is signal too high (open circuit or short to battery), FMI 4 is signal too low (short to ground). This is a wiring/sensor fault independent of actual coolant temperature.	Damaged sensor wiring, a corroded connector, or a failed coolant temperature sensor.	Inspect the sensor connector and harness for corrosion or damage, test sensor resistance against spec, and replace the sensor if it is out of range.
100-3 / 100-4	Engine oil pressure sensor circuit reads outside the normal voltage range: FMI 3 is signal too high, FMI 4 is signal too low, independent of actual oil pressure.	Damaged sensor wiring, a corroded connector, or a failed oil pressure sensor.	Check wiring and connector condition, confirm actual oil pressure with a mechanical gauge, and replace the sensor if the electrical fault persists.

Prefix	Identifies	Notes
C7R	329E L, long (standard) undercarriage	Earliest production serial block found for the 329E L, listed alongside prefix PLW in the same parts catalog set. Fitted with the Cat C7.1 ACERT engine. Exact build year not documented — confirm with your dealer.
PLW	329E L, long (standard) undercarriage	Early production serial block for the 329E L, covered by the same parts/service manual set as prefix C7R. Fitted with the Cat C7.1 ACERT engine. Exact build year not documented — confirm with your dealer.
ZCD	329E L, long (standard) undercarriage	Later production serial block for the 329E L, covered by its own dedicated parts/service manual, separate from the C7R/PLW block. Fitted with the Cat C7.1 ACERT engine. At least one machine in this range left the factory in 2014.