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Terex T120P Generator Set

The Terex T120P is a 96 kW (120 kVA) prime generator set powered by a Perkins 1104D-E44TG1 engine. It is available at 208 V, 220 V, 240 V, 440 V and 480 V, single-phase and rated 350 A. It holds about 8.4 L (2.2 gal) of oil and 7 L (1.8 gal) of coolant. The set measures 2790×1190×1620 mm (109.8×46.9×63.8 in) and weighs about 2445 kg (5390 lb). The same 1104D-E44TG1 engine also powers generator sets from Perkins.

4.41 L
Displacement
8.4 L
Oil capacity
1
Document types

Service parts for the T120P

Grouped by system, with how many of each the parts manual calls for.

Air intake

1 required

Belts

1 required

Prices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.

Specifications

Prime power96 kW
Oil capacity8.4 L
Voltage options208 V, 220 V, 240 V, 440 V, 480 V
Phase3 phase,1 phase
Rated current350 A
Circuit breaker350 A
Dimensions (L×W×H)2790×1190×1620 mm
Dry weight2445 kg

Engine

Perkins 1104D-E44TG1
Oil capacity8.4 L
Coolant capacity7.0 L
Displacement4.41 L
Aspirationturbocharged
Rated speed1800 rpm

Maintenance & consumables

for the Perkins 1104D-E44TG1
ItemSpecCapacityPart #Interval
Air filterAir Filter - Secondary125562 Amazon eBay
Fuel filter
Oil filter
Battery
BeltBelt125552 Amazon eBay FridayParts $77.87
Coolant16.5 litres
Oil8.4 litres
Spark plug

Common questions

What engine is in the Terex T120P?

The Terex T120P is powered by the Perkins 1104D-E44TG1 engine.

How much oil does the Terex T120P take?

The Perkins 1104D-E44TG1 engine in the Terex T120P has an oil capacity of 8.4 liters.

Which air filter part number does the Terex T120P take?

The Terex T120P uses air filter part number 125562.

Troubleshooting

6

Symptoms & remedies

SymptomCauseRemedy
No generator output voltageCircuit breaker trippedReset circuit breaker
Low generator output voltageVoltage adjustment set too lowAdjust voltage potentiometer
Low engine speedCall TEREX Service
Fluctuating or surging generator output voltageCheck engine fuel, oil, and air filters
High generator output voltageVoltage adjustment potentiometer set too highAdjust potentiometer
High engine speedCall TEREX Service

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Terex T120P troubleshooting guide (14 entries) →

Parts

2
Part #DescriptionQtySystem
125552BeltBelt Amazon eBay FridayParts $77.87
125562Air Filter - SecondaryAir filter Amazon eBay

Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.

Fuel consumption

RatingLoadL/hgal/h
Prime4.416.6
Prime50%3.413.0
Prime75%5.019.0
Standby5.621.0
Standby100%6.023.0

Available documents

Service manual — 134277 (Terex)
Other sets with this engine