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Home›John Deere›John Deere QAS 70

John Deere QAS 70 Generator Set

The John Deere QAS 70 is a 43.3 kW (43.3 kVA) standby generator set powered by a John Deere TF4045285 engine. It is available at 240 V and 480 V, 3-phase, 60 Hz and rated 168 A. It holds about 21 L (5.5 gal) of oil and 16 L (4.2 gal) of coolant, with a maximum ambient rating of 50 °C. The set produces 69 dBA at 23 m. An integrated tank holds 660 L (174.4 gal), roughly 37.3 hours of runtime.

43 kW
Standby
4.5 L
Displacement
21.0 L
Oil capacity
0
Document types

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Specifications

Frequency60.0 Hz
Standby power43 kW
Standby kVA43
Oil capacity21.0 L
AlternatorStamford/AvK UCI 224 G1
Voltage options240 V, 480 V
Phase3php,1php
Rated current[168, 84, 180] A
Power factor[0.8, 1.0]
Circuit breaker[100, 200] A
Coolant capacity16 L
Max ambient50 °C
Sound level69.0 dBA @ 23 m
Fuel tank660.0 L
Tank runtime37.3 hr

Engine

John Deere TF4045285
Oil capacity21.0 L
Coolant capacity16.0 L
Displacement4.5 L
Aspirationturbo

Maintenance & consumables

for the John Deere TF4045285
ItemSpecCapacityPart #Interval
Air filter—250 hr find
Fuel filter—500 hr find
Oil filter—2000 hr find
Belt—2000 hr find
CoolantPARCOOL EG—30 hr
Coolant filter—250 hr find
OilPAROIL Extra or PAROIL E—2000 hr

Common questions

What is the power rating of the John Deere QAS 70?

The John Deere QAS 70 is rated 43 kW standby (43.3 kVA).

What engine does the John Deere QAS 70 use?

The John Deere QAS 70 is powered by the John Deere TF4045285 engine.

What is the oil capacity of the John Deere QAS 70?

The John Deere TF4045285 engine in the John Deere QAS 70 has an oil capacity of 21.0 liters.

What alternator does the John Deere QAS 70 use?

The John Deere QAS 70 uses a Stamford/AvK UCI 224 G1 alternator.

Troubleshooting

15

Symptoms & remedies

SymptomCauseRemedy
Alternator gives 0 VoltBlown fuse.Replace fuse.
No residual voltageExcite the alternator by applying a 12V battery voltage with a 30 W resistor in series on the + and - terminals of the electronic regulator, respecting the polarities.
After being excited the alternator still gives 0 VoltConnections are interrupted.Check connection cables, measure winding resistances and compare with values mentioned in the alternator manual.
Low voltage at no loadVoltage potentiometer out of setting.Reset voltage.
Intervention of protectionCheck frequency/voltage regulator.
Winding failureCheck windings.
High voltage at no loadVoltage potentiometer out of setting.Reset voltage.
Failed regulatorSubstitute regulator.
Lower than rated voltage at loadVoltage potentiometer out of setting.Reset voltage potentiometer.
Intervention by protectionCheck frequency/voltage regulator.
Current too high, power factor lower than 0.8; speed lower than 10% of rated speedFailed regulator.Substitute regulator.
Rotating bridge failureCheck diodes, disconnect cables.
Higher than rated voltage at loadVoltage potentiometer out of setting.Reset voltage potentiometer.
Unstable voltageSpeed variation in engine.Check regularity of rotation.
Regulator out of settingRegulate stability of regulator by acting on STABILITY potentiometer.

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.

Fuel consumption

RatingLoadL/hgal/h
Prime32.0
Prime100%3.5

Available documents